[PATCH 01/13] drm/i915/pps: abstract panel power sequencer from intel_dp.c

[Jani Nikula <jani.nikula@xxxxxxxxx>]

In a long overdue refactoring, split out all panel sequencer code from
intel_dp.c to new intel_pps.[ch].

The first part is mostly just code movement as-is, without cleanups.

We need to add a vlv_get_dpll() helper to get at the vlv/chv dpll from
pps code.

Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
 drivers/gpu/drm/i915/Makefile                 |    1 +
 drivers/gpu/drm/i915/display/intel_ddi.c      |    1 +
 .../drm/i915/display/intel_display_power.c    |    2 +-
 drivers/gpu/drm/i915/display/intel_dp.c       | 1442 +----------------
 drivers/gpu/drm/i915/display/intel_dp.h       |    5 +-
 drivers/gpu/drm/i915/display/intel_pps.c      | 1337 +++++++++++++++
 drivers/gpu/drm/i915/display/intel_pps.h      |   53 +
 7 files changed, 1447 insertions(+), 1394 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/display/intel_pps.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_pps.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 3a439b1d0496..1e26902a86e5 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -250,6 +250,7 @@ i915-y += \
 	display/intel_lspcon.o \
 	display/intel_lvds.o \
 	display/intel_panel.o \
+	display/intel_pps.o \
 	display/intel_sdvo.o \
 	display/intel_tv.o \
 	display/intel_vdsc.o \
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 6863236df1d0..9ddbe8b8730b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -46,6 +46,7 @@
 #include "intel_hotplug.h"
 #include "intel_lspcon.h"
 #include "intel_panel.h"
+#include "intel_pps.h"
 #include "intel_psr.h"
 #include "intel_sprite.h"
 #include "intel_tc.h"
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index d52374f01316..a11bd8213df4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -4,7 +4,6 @@
  */
 
 #include "display/intel_crt.h"
-#include "display/intel_dp.h"
 
 #include "i915_drv.h"
 #include "i915_irq.h"
@@ -16,6 +15,7 @@
 #include "intel_dpio_phy.h"
 #include "intel_hotplug.h"
 #include "intel_pm.h"
+#include "intel_pps.h"
 #include "intel_sideband.h"
 #include "intel_tc.h"
 #include "intel_vga.h"
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index b2bc0c8c39c7..d4760c478653 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -58,6 +58,7 @@
 #include "intel_lspcon.h"
 #include "intel_lvds.h"
 #include "intel_panel.h"
+#include "intel_pps.h"
 #include "intel_psr.h"
 #include "intel_sideband.h"
 #include "intel_tc.h"
@@ -121,6 +122,11 @@ static const struct dp_link_dpll chv_dpll[] = {
 		{ .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
 };
 
+const struct dpll *vlv_get_dpll(struct drm_i915_private *i915)
+{
+	return IS_CHERRYVIEW(i915) ? &chv_dpll[0].dpll : &vlv_dpll[0].dpll;
+}
+
 /* Constants for DP DSC configurations */
 static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};
 
@@ -145,12 +151,6 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp)
 
 static void intel_dp_link_down(struct intel_encoder *encoder,
 			       const struct intel_crtc_state *old_crtc_state);
-static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
-static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
-static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
-					   const struct intel_crtc_state *crtc_state);
-static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
-				      enum pipe pipe);
 static void intel_dp_unset_edid(struct intel_dp *intel_dp);
 
 /* update sink rates from dpcd */
@@ -854,451 +854,6 @@ static void intel_dp_unpack_aux(u32 src, u8 *dst, int dst_bytes)
 		dst[i] = src >> ((3-i) * 8);
 }
 
-static void
-intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp);
-static void
-intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
-					      bool force_disable_vdd);
-static void
-intel_dp_pps_init(struct intel_dp *intel_dp);
-
-static intel_wakeref_t
-pps_lock(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	intel_wakeref_t wakeref;
-
-	/*
-	 * See intel_power_sequencer_reset() why we need
-	 * a power domain reference here.
-	 */
-	wakeref = intel_display_power_get(dev_priv,
-					  intel_aux_power_domain(dp_to_dig_port(intel_dp)));
-
-	mutex_lock(&dev_priv->pps_mutex);
-
-	return wakeref;
-}
-
-static intel_wakeref_t
-pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	mutex_unlock(&dev_priv->pps_mutex);
-	intel_display_power_put(dev_priv,
-				intel_aux_power_domain(dp_to_dig_port(intel_dp)),
-				wakeref);
-	return 0;
-}
-
-#define with_pps_lock(dp, wf) \
-	for ((wf) = pps_lock(dp); (wf); (wf) = pps_unlock((dp), (wf)))
-
-static void
-vlv_power_sequencer_kick(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	enum pipe pipe = intel_dp->pps_pipe;
-	bool pll_enabled, release_cl_override = false;
-	enum dpio_phy phy = DPIO_PHY(pipe);
-	enum dpio_channel ch = vlv_pipe_to_channel(pipe);
-	u32 DP;
-
-	if (drm_WARN(&dev_priv->drm,
-		     intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN,
-		     "skipping pipe %c power sequencer kick due to [ENCODER:%d:%s] being active\n",
-		     pipe_name(pipe), dig_port->base.base.base.id,
-		     dig_port->base.base.name))
-		return;
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "kicking pipe %c power sequencer for [ENCODER:%d:%s]\n",
-		    pipe_name(pipe), dig_port->base.base.base.id,
-		    dig_port->base.base.name);
-
-	/* Preserve the BIOS-computed detected bit. This is
-	 * supposed to be read-only.
-	 */
-	DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
-	DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
-	DP |= DP_PORT_WIDTH(1);
-	DP |= DP_LINK_TRAIN_PAT_1;
-
-	if (IS_CHERRYVIEW(dev_priv))
-		DP |= DP_PIPE_SEL_CHV(pipe);
-	else
-		DP |= DP_PIPE_SEL(pipe);
-
-	pll_enabled = intel_de_read(dev_priv, DPLL(pipe)) & DPLL_VCO_ENABLE;
-
-	/*
-	 * The DPLL for the pipe must be enabled for this to work.
-	 * So enable temporarily it if it's not already enabled.
-	 */
-	if (!pll_enabled) {
-		release_cl_override = IS_CHERRYVIEW(dev_priv) &&
-			!chv_phy_powergate_ch(dev_priv, phy, ch, true);
-
-		if (vlv_force_pll_on(dev_priv, pipe, IS_CHERRYVIEW(dev_priv) ?
-				     &chv_dpll[0].dpll : &vlv_dpll[0].dpll)) {
-			drm_err(&dev_priv->drm,
-				"Failed to force on pll for pipe %c!\n",
-				pipe_name(pipe));
-			return;
-		}
-	}
-
-	/*
-	 * Similar magic as in intel_dp_enable_port().
-	 * We _must_ do this port enable + disable trick
-	 * to make this power sequencer lock onto the port.
-	 * Otherwise even VDD force bit won't work.
-	 */
-	intel_de_write(dev_priv, intel_dp->output_reg, DP);
-	intel_de_posting_read(dev_priv, intel_dp->output_reg);
-
-	intel_de_write(dev_priv, intel_dp->output_reg, DP | DP_PORT_EN);
-	intel_de_posting_read(dev_priv, intel_dp->output_reg);
-
-	intel_de_write(dev_priv, intel_dp->output_reg, DP & ~DP_PORT_EN);
-	intel_de_posting_read(dev_priv, intel_dp->output_reg);
-
-	if (!pll_enabled) {
-		vlv_force_pll_off(dev_priv, pipe);
-
-		if (release_cl_override)
-			chv_phy_powergate_ch(dev_priv, phy, ch, false);
-	}
-}
-
-static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
-{
-	struct intel_encoder *encoder;
-	unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
-
-	/*
-	 * We don't have power sequencer currently.
-	 * Pick one that's not used by other ports.
-	 */
-	for_each_intel_dp(&dev_priv->drm, encoder) {
-		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
-		if (encoder->type == INTEL_OUTPUT_EDP) {
-			drm_WARN_ON(&dev_priv->drm,
-				    intel_dp->active_pipe != INVALID_PIPE &&
-				    intel_dp->active_pipe !=
-				    intel_dp->pps_pipe);
-
-			if (intel_dp->pps_pipe != INVALID_PIPE)
-				pipes &= ~(1 << intel_dp->pps_pipe);
-		} else {
-			drm_WARN_ON(&dev_priv->drm,
-				    intel_dp->pps_pipe != INVALID_PIPE);
-
-			if (intel_dp->active_pipe != INVALID_PIPE)
-				pipes &= ~(1 << intel_dp->active_pipe);
-		}
-	}
-
-	if (pipes == 0)
-		return INVALID_PIPE;
-
-	return ffs(pipes) - 1;
-}
-
-static enum pipe
-vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	enum pipe pipe;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	/* We should never land here with regular DP ports */
-	drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
-
-	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE &&
-		    intel_dp->active_pipe != intel_dp->pps_pipe);
-
-	if (intel_dp->pps_pipe != INVALID_PIPE)
-		return intel_dp->pps_pipe;
-
-	pipe = vlv_find_free_pps(dev_priv);
-
-	/*
-	 * Didn't find one. This should not happen since there
-	 * are two power sequencers and up to two eDP ports.
-	 */
-	if (drm_WARN_ON(&dev_priv->drm, pipe == INVALID_PIPE))
-		pipe = PIPE_A;
-
-	vlv_steal_power_sequencer(dev_priv, pipe);
-	intel_dp->pps_pipe = pipe;
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "picked pipe %c power sequencer for [ENCODER:%d:%s]\n",
-		    pipe_name(intel_dp->pps_pipe),
-		    dig_port->base.base.base.id,
-		    dig_port->base.base.name);
-
-	/* init power sequencer on this pipe and port */
-	intel_dp_init_panel_power_sequencer(intel_dp);
-	intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
-
-	/*
-	 * Even vdd force doesn't work until we've made
-	 * the power sequencer lock in on the port.
-	 */
-	vlv_power_sequencer_kick(intel_dp);
-
-	return intel_dp->pps_pipe;
-}
-
-static int
-bxt_power_sequencer_idx(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	int backlight_controller = dev_priv->vbt.backlight.controller;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	/* We should never land here with regular DP ports */
-	drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
-
-	if (!intel_dp->pps_reset)
-		return backlight_controller;
-
-	intel_dp->pps_reset = false;
-
-	/*
-	 * Only the HW needs to be reprogrammed, the SW state is fixed and
-	 * has been setup during connector init.
-	 */
-	intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
-
-	return backlight_controller;
-}
-
-typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
-			       enum pipe pipe);
-
-static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
-			       enum pipe pipe)
-{
-	return intel_de_read(dev_priv, PP_STATUS(pipe)) & PP_ON;
-}
-
-static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
-				enum pipe pipe)
-{
-	return intel_de_read(dev_priv, PP_CONTROL(pipe)) & EDP_FORCE_VDD;
-}
-
-static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
-			 enum pipe pipe)
-{
-	return true;
-}
-
-static enum pipe
-vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
-		     enum port port,
-		     vlv_pipe_check pipe_check)
-{
-	enum pipe pipe;
-
-	for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
-		u32 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(pipe)) &
-			PANEL_PORT_SELECT_MASK;
-
-		if (port_sel != PANEL_PORT_SELECT_VLV(port))
-			continue;
-
-		if (!pipe_check(dev_priv, pipe))
-			continue;
-
-		return pipe;
-	}
-
-	return INVALID_PIPE;
-}
-
-static void
-vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	enum port port = dig_port->base.port;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	/* try to find a pipe with this port selected */
-	/* first pick one where the panel is on */
-	intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
-						  vlv_pipe_has_pp_on);
-	/* didn't find one? pick one where vdd is on */
-	if (intel_dp->pps_pipe == INVALID_PIPE)
-		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
-							  vlv_pipe_has_vdd_on);
-	/* didn't find one? pick one with just the correct port */
-	if (intel_dp->pps_pipe == INVALID_PIPE)
-		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
-							  vlv_pipe_any);
-
-	/* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
-	if (intel_dp->pps_pipe == INVALID_PIPE) {
-		drm_dbg_kms(&dev_priv->drm,
-			    "no initial power sequencer for [ENCODER:%d:%s]\n",
-			    dig_port->base.base.base.id,
-			    dig_port->base.base.name);
-		return;
-	}
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "initial power sequencer for [ENCODER:%d:%s]: pipe %c\n",
-		    dig_port->base.base.base.id,
-		    dig_port->base.base.name,
-		    pipe_name(intel_dp->pps_pipe));
-
-	intel_dp_init_panel_power_sequencer(intel_dp);
-	intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
-}
-
-void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
-{
-	struct intel_encoder *encoder;
-
-	if (drm_WARN_ON(&dev_priv->drm,
-			!(IS_VALLEYVIEW(dev_priv) ||
-			  IS_CHERRYVIEW(dev_priv) ||
-			  IS_GEN9_LP(dev_priv))))
-		return;
-
-	/*
-	 * We can't grab pps_mutex here due to deadlock with power_domain
-	 * mutex when power_domain functions are called while holding pps_mutex.
-	 * That also means that in order to use pps_pipe the code needs to
-	 * hold both a power domain reference and pps_mutex, and the power domain
-	 * reference get/put must be done while _not_ holding pps_mutex.
-	 * pps_{lock,unlock}() do these steps in the correct order, so one
-	 * should use them always.
-	 */
-
-	for_each_intel_dp(&dev_priv->drm, encoder) {
-		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
-		drm_WARN_ON(&dev_priv->drm,
-			    intel_dp->active_pipe != INVALID_PIPE);
-
-		if (encoder->type != INTEL_OUTPUT_EDP)
-			continue;
-
-		if (IS_GEN9_LP(dev_priv))
-			intel_dp->pps_reset = true;
-		else
-			intel_dp->pps_pipe = INVALID_PIPE;
-	}
-}
-
-struct pps_registers {
-	i915_reg_t pp_ctrl;
-	i915_reg_t pp_stat;
-	i915_reg_t pp_on;
-	i915_reg_t pp_off;
-	i915_reg_t pp_div;
-};
-
-static void intel_pps_get_registers(struct intel_dp *intel_dp,
-				    struct pps_registers *regs)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	int pps_idx = 0;
-
-	memset(regs, 0, sizeof(*regs));
-
-	if (IS_GEN9_LP(dev_priv))
-		pps_idx = bxt_power_sequencer_idx(intel_dp);
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		pps_idx = vlv_power_sequencer_pipe(intel_dp);
-
-	regs->pp_ctrl = PP_CONTROL(pps_idx);
-	regs->pp_stat = PP_STATUS(pps_idx);
-	regs->pp_on = PP_ON_DELAYS(pps_idx);
-	regs->pp_off = PP_OFF_DELAYS(pps_idx);
-
-	/* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
-	if (IS_GEN9_LP(dev_priv) || INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
-		regs->pp_div = INVALID_MMIO_REG;
-	else
-		regs->pp_div = PP_DIVISOR(pps_idx);
-}
-
-static i915_reg_t
-_pp_ctrl_reg(struct intel_dp *intel_dp)
-{
-	struct pps_registers regs;
-
-	intel_pps_get_registers(intel_dp, &regs);
-
-	return regs.pp_ctrl;
-}
-
-static i915_reg_t
-_pp_stat_reg(struct intel_dp *intel_dp)
-{
-	struct pps_registers regs;
-
-	intel_pps_get_registers(intel_dp, &regs);
-
-	return regs.pp_stat;
-}
-
-static bool edp_have_panel_power(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
-	    intel_dp->pps_pipe == INVALID_PIPE)
-		return false;
-
-	return (intel_de_read(dev_priv, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
-}
-
-static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
-	    intel_dp->pps_pipe == INVALID_PIPE)
-		return false;
-
-	return intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
-}
-
-static void
-intel_dp_check_edp(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
-		drm_WARN(&dev_priv->drm, 1,
-			 "eDP powered off while attempting aux channel communication.\n");
-		drm_dbg_kms(&dev_priv->drm, "Status 0x%08x Control 0x%08x\n",
-			    intel_de_read(dev_priv, _pp_stat_reg(intel_dp)),
-			    intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)));
-	}
-}
-
 static u32
 intel_dp_aux_wait_done(struct intel_dp *intel_dp)
 {
@@ -2907,492 +2462,67 @@ static void intel_dp_prepare(struct intel_encoder *encoder,
 	 *
 	 * IBX PCH and CPU are the same for almost everything,
 	 * except that the CPU DP PLL is configured in this
-	 * register
-	 *
-	 * CPT PCH is quite different, having many bits moved
-	 * to the TRANS_DP_CTL register instead. That
-	 * configuration happens (oddly) in ilk_pch_enable
-	 */
-
-	/* Preserve the BIOS-computed detected bit. This is
-	 * supposed to be read-only.
-	 */
-	intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
-
-	/* Handle DP bits in common between all three register formats */
-	intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
-	intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
-
-	/* Split out the IBX/CPU vs CPT settings */
-
-	if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
-		if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
-			intel_dp->DP |= DP_SYNC_HS_HIGH;
-		if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
-			intel_dp->DP |= DP_SYNC_VS_HIGH;
-		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
-
-		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
-			intel_dp->DP |= DP_ENHANCED_FRAMING;
-
-		intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
-	} else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
-		u32 trans_dp;
-
-		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
-
-		trans_dp = intel_de_read(dev_priv, TRANS_DP_CTL(crtc->pipe));
-		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
-			trans_dp |= TRANS_DP_ENH_FRAMING;
-		else
-			trans_dp &= ~TRANS_DP_ENH_FRAMING;
-		intel_de_write(dev_priv, TRANS_DP_CTL(crtc->pipe), trans_dp);
-	} else {
-		if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
-			intel_dp->DP |= DP_COLOR_RANGE_16_235;
-
-		if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
-			intel_dp->DP |= DP_SYNC_HS_HIGH;
-		if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
-			intel_dp->DP |= DP_SYNC_VS_HIGH;
-		intel_dp->DP |= DP_LINK_TRAIN_OFF;
-
-		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
-			intel_dp->DP |= DP_ENHANCED_FRAMING;
-
-		if (IS_CHERRYVIEW(dev_priv))
-			intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe);
-		else
-			intel_dp->DP |= DP_PIPE_SEL(crtc->pipe);
-	}
-}
-
-#define IDLE_ON_MASK		(PP_ON | PP_SEQUENCE_MASK | 0                     | PP_SEQUENCE_STATE_MASK)
-#define IDLE_ON_VALUE   	(PP_ON | PP_SEQUENCE_NONE | 0                     | PP_SEQUENCE_STATE_ON_IDLE)
-
-#define IDLE_OFF_MASK		(PP_ON | PP_SEQUENCE_MASK | 0                     | 0)
-#define IDLE_OFF_VALUE		(0     | PP_SEQUENCE_NONE | 0                     | 0)
-
-#define IDLE_CYCLE_MASK		(PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
-#define IDLE_CYCLE_VALUE	(0     | PP_SEQUENCE_NONE | 0                     | PP_SEQUENCE_STATE_OFF_IDLE)
-
-static void intel_pps_verify_state(struct intel_dp *intel_dp);
-
-static void wait_panel_status(struct intel_dp *intel_dp,
-				       u32 mask,
-				       u32 value)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	i915_reg_t pp_stat_reg, pp_ctrl_reg;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	intel_pps_verify_state(intel_dp);
-
-	pp_stat_reg = _pp_stat_reg(intel_dp);
-	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "mask %08x value %08x status %08x control %08x\n",
-		    mask, value,
-		    intel_de_read(dev_priv, pp_stat_reg),
-		    intel_de_read(dev_priv, pp_ctrl_reg));
-
-	if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
-				       mask, value, 5000))
-		drm_err(&dev_priv->drm,
-			"Panel status timeout: status %08x control %08x\n",
-			intel_de_read(dev_priv, pp_stat_reg),
-			intel_de_read(dev_priv, pp_ctrl_reg));
-
-	drm_dbg_kms(&dev_priv->drm, "Wait complete\n");
-}
-
-static void wait_panel_on(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
-
-	drm_dbg_kms(&i915->drm, "Wait for panel power on\n");
-	wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
-}
-
-static void wait_panel_off(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
-
-	drm_dbg_kms(&i915->drm, "Wait for panel power off time\n");
-	wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
-}
-
-static void wait_panel_power_cycle(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
-	ktime_t panel_power_on_time;
-	s64 panel_power_off_duration;
-
-	drm_dbg_kms(&i915->drm, "Wait for panel power cycle\n");
-
-	/* take the difference of currrent time and panel power off time
-	 * and then make panel wait for t11_t12 if needed. */
-	panel_power_on_time = ktime_get_boottime();
-	panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
-
-	/* When we disable the VDD override bit last we have to do the manual
-	 * wait. */
-	if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
-		wait_remaining_ms_from_jiffies(jiffies,
-				       intel_dp->panel_power_cycle_delay - panel_power_off_duration);
-
-	wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
-}
-
-static void wait_backlight_on(struct intel_dp *intel_dp)
-{
-	wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
-				       intel_dp->backlight_on_delay);
-}
-
-static void edp_wait_backlight_off(struct intel_dp *intel_dp)
-{
-	wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
-				       intel_dp->backlight_off_delay);
-}
-
-/* Read the current pp_control value, unlocking the register if it
- * is locked
- */
-
-static  u32 ilk_get_pp_control(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 control;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
-	if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
-			(control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
-		control &= ~PANEL_UNLOCK_MASK;
-		control |= PANEL_UNLOCK_REGS;
-	}
-	return control;
-}
-
-/*
- * Must be paired with edp_panel_vdd_off().
- * Must hold pps_mutex around the whole on/off sequence.
- * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
- */
-static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	u32 pp;
-	i915_reg_t pp_stat_reg, pp_ctrl_reg;
-	bool need_to_disable = !intel_dp->want_panel_vdd;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if (!intel_dp_is_edp(intel_dp))
-		return false;
-
-	cancel_delayed_work(&intel_dp->panel_vdd_work);
-	intel_dp->want_panel_vdd = true;
-
-	if (edp_have_panel_vdd(intel_dp))
-		return need_to_disable;
-
-	drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
-	intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
-							intel_aux_power_domain(dig_port));
-
-	drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD on\n",
-		    dig_port->base.base.base.id,
-		    dig_port->base.base.name);
-
-	if (!edp_have_panel_power(intel_dp))
-		wait_panel_power_cycle(intel_dp);
-
-	pp = ilk_get_pp_control(intel_dp);
-	pp |= EDP_FORCE_VDD;
-
-	pp_stat_reg = _pp_stat_reg(intel_dp);
-	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-
-	intel_de_write(dev_priv, pp_ctrl_reg, pp);
-	intel_de_posting_read(dev_priv, pp_ctrl_reg);
-	drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
-		    intel_de_read(dev_priv, pp_stat_reg),
-		    intel_de_read(dev_priv, pp_ctrl_reg));
-	/*
-	 * If the panel wasn't on, delay before accessing aux channel
-	 */
-	if (!edp_have_panel_power(intel_dp)) {
-		drm_dbg_kms(&dev_priv->drm,
-			    "[ENCODER:%d:%s] panel power wasn't enabled\n",
-			    dig_port->base.base.base.id,
-			    dig_port->base.base.name);
-		msleep(intel_dp->panel_power_up_delay);
-	}
-
-	return need_to_disable;
-}
-
-/*
- * Must be paired with intel_edp_panel_vdd_off() or
- * intel_edp_panel_off().
- * Nested calls to these functions are not allowed since
- * we drop the lock. Caller must use some higher level
- * locking to prevent nested calls from other threads.
- */
-void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
-{
-	intel_wakeref_t wakeref;
-	bool vdd;
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	vdd = false;
-	with_pps_lock(intel_dp, wakeref)
-		vdd = edp_panel_vdd_on(intel_dp);
-	I915_STATE_WARN(!vdd, "[ENCODER:%d:%s] VDD already requested on\n",
-			dp_to_dig_port(intel_dp)->base.base.base.id,
-			dp_to_dig_port(intel_dp)->base.base.name);
-}
-
-static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port =
-		dp_to_dig_port(intel_dp);
-	u32 pp;
-	i915_reg_t pp_stat_reg, pp_ctrl_reg;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	drm_WARN_ON(&dev_priv->drm, intel_dp->want_panel_vdd);
-
-	if (!edp_have_panel_vdd(intel_dp))
-		return;
-
-	drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD off\n",
-		    dig_port->base.base.base.id,
-		    dig_port->base.base.name);
-
-	pp = ilk_get_pp_control(intel_dp);
-	pp &= ~EDP_FORCE_VDD;
-
-	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-	pp_stat_reg = _pp_stat_reg(intel_dp);
-
-	intel_de_write(dev_priv, pp_ctrl_reg, pp);
-	intel_de_posting_read(dev_priv, pp_ctrl_reg);
-
-	/* Make sure sequencer is idle before allowing subsequent activity */
-	drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
-		    intel_de_read(dev_priv, pp_stat_reg),
-		    intel_de_read(dev_priv, pp_ctrl_reg));
-
-	if ((pp & PANEL_POWER_ON) == 0)
-		intel_dp->panel_power_off_time = ktime_get_boottime();
-
-	intel_display_power_put(dev_priv,
-				intel_aux_power_domain(dig_port),
-				fetch_and_zero(&intel_dp->vdd_wakeref));
-}
-
-static void edp_panel_vdd_work(struct work_struct *__work)
-{
-	struct intel_dp *intel_dp =
-		container_of(to_delayed_work(__work),
-			     struct intel_dp, panel_vdd_work);
-	intel_wakeref_t wakeref;
-
-	with_pps_lock(intel_dp, wakeref) {
-		if (!intel_dp->want_panel_vdd)
-			edp_panel_vdd_off_sync(intel_dp);
-	}
-}
-
-static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
-{
-	unsigned long delay;
-
-	/*
-	 * Queue the timer to fire a long time from now (relative to the power
-	 * down delay) to keep the panel power up across a sequence of
-	 * operations.
-	 */
-	delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
-	schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
-}
-
-/*
- * Must be paired with edp_panel_vdd_on().
- * Must hold pps_mutex around the whole on/off sequence.
- * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
- */
-static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	I915_STATE_WARN(!intel_dp->want_panel_vdd, "[ENCODER:%d:%s] VDD not forced on",
-			dp_to_dig_port(intel_dp)->base.base.base.id,
-			dp_to_dig_port(intel_dp)->base.base.name);
-
-	intel_dp->want_panel_vdd = false;
-
-	if (sync)
-		edp_panel_vdd_off_sync(intel_dp);
-	else
-		edp_panel_vdd_schedule_off(intel_dp);
-}
-
-static void edp_panel_on(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 pp;
-	i915_reg_t pp_ctrl_reg;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power on\n",
-		    dp_to_dig_port(intel_dp)->base.base.base.id,
-		    dp_to_dig_port(intel_dp)->base.base.name);
-
-	if (drm_WARN(&dev_priv->drm, edp_have_panel_power(intel_dp),
-		     "[ENCODER:%d:%s] panel power already on\n",
-		     dp_to_dig_port(intel_dp)->base.base.base.id,
-		     dp_to_dig_port(intel_dp)->base.base.name))
-		return;
-
-	wait_panel_power_cycle(intel_dp);
-
-	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-	pp = ilk_get_pp_control(intel_dp);
-	if (IS_GEN(dev_priv, 5)) {
-		/* ILK workaround: disable reset around power sequence */
-		pp &= ~PANEL_POWER_RESET;
-		intel_de_write(dev_priv, pp_ctrl_reg, pp);
-		intel_de_posting_read(dev_priv, pp_ctrl_reg);
-	}
-
-	pp |= PANEL_POWER_ON;
-	if (!IS_GEN(dev_priv, 5))
-		pp |= PANEL_POWER_RESET;
-
-	intel_de_write(dev_priv, pp_ctrl_reg, pp);
-	intel_de_posting_read(dev_priv, pp_ctrl_reg);
-
-	wait_panel_on(intel_dp);
-	intel_dp->last_power_on = jiffies;
-
-	if (IS_GEN(dev_priv, 5)) {
-		pp |= PANEL_POWER_RESET; /* restore panel reset bit */
-		intel_de_write(dev_priv, pp_ctrl_reg, pp);
-		intel_de_posting_read(dev_priv, pp_ctrl_reg);
-	}
-}
-
-void intel_edp_panel_on(struct intel_dp *intel_dp)
-{
-	intel_wakeref_t wakeref;
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	with_pps_lock(intel_dp, wakeref)
-		edp_panel_on(intel_dp);
-}
-
-
-static void edp_panel_off(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	u32 pp;
-	i915_reg_t pp_ctrl_reg;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power off\n",
-		    dig_port->base.base.base.id, dig_port->base.base.name);
-
-	drm_WARN(&dev_priv->drm, !intel_dp->want_panel_vdd,
-		 "Need [ENCODER:%d:%s] VDD to turn off panel\n",
-		 dig_port->base.base.base.id, dig_port->base.base.name);
-
-	pp = ilk_get_pp_control(intel_dp);
-	/* We need to switch off panel power _and_ force vdd, for otherwise some
-	 * panels get very unhappy and cease to work. */
-	pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
-		EDP_BLC_ENABLE);
-
-	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-
-	intel_dp->want_panel_vdd = false;
+	 * register
+	 *
+	 * CPT PCH is quite different, having many bits moved
+	 * to the TRANS_DP_CTL register instead. That
+	 * configuration happens (oddly) in ilk_pch_enable
+	 */
 
-	intel_de_write(dev_priv, pp_ctrl_reg, pp);
-	intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	/* Preserve the BIOS-computed detected bit. This is
+	 * supposed to be read-only.
+	 */
+	intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
 
-	wait_panel_off(intel_dp);
-	intel_dp->panel_power_off_time = ktime_get_boottime();
+	/* Handle DP bits in common between all three register formats */
+	intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
+	intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
 
-	/* We got a reference when we enabled the VDD. */
-	intel_display_power_put(dev_priv,
-				intel_aux_power_domain(dig_port),
-				fetch_and_zero(&intel_dp->vdd_wakeref));
-}
+	/* Split out the IBX/CPU vs CPT settings */
 
-void intel_edp_panel_off(struct intel_dp *intel_dp)
-{
-	intel_wakeref_t wakeref;
+	if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+			intel_dp->DP |= DP_SYNC_HS_HIGH;
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+			intel_dp->DP |= DP_SYNC_VS_HIGH;
+		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
 
-	if (!intel_dp_is_edp(intel_dp))
-		return;
+		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
+			intel_dp->DP |= DP_ENHANCED_FRAMING;
 
-	with_pps_lock(intel_dp, wakeref)
-		edp_panel_off(intel_dp);
-}
+		intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
+	} else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
+		u32 trans_dp;
 
-/* Enable backlight in the panel power control. */
-static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	intel_wakeref_t wakeref;
+		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
 
-	/*
-	 * If we enable the backlight right away following a panel power
-	 * on, we may see slight flicker as the panel syncs with the eDP
-	 * link.  So delay a bit to make sure the image is solid before
-	 * allowing it to appear.
-	 */
-	wait_backlight_on(intel_dp);
+		trans_dp = intel_de_read(dev_priv, TRANS_DP_CTL(crtc->pipe));
+		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
+			trans_dp |= TRANS_DP_ENH_FRAMING;
+		else
+			trans_dp &= ~TRANS_DP_ENH_FRAMING;
+		intel_de_write(dev_priv, TRANS_DP_CTL(crtc->pipe), trans_dp);
+	} else {
+		if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
+			intel_dp->DP |= DP_COLOR_RANGE_16_235;
 
-	with_pps_lock(intel_dp, wakeref) {
-		i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-		u32 pp;
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+			intel_dp->DP |= DP_SYNC_HS_HIGH;
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+			intel_dp->DP |= DP_SYNC_VS_HIGH;
+		intel_dp->DP |= DP_LINK_TRAIN_OFF;
 
-		pp = ilk_get_pp_control(intel_dp);
-		pp |= EDP_BLC_ENABLE;
+		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
+			intel_dp->DP |= DP_ENHANCED_FRAMING;
 
-		intel_de_write(dev_priv, pp_ctrl_reg, pp);
-		intel_de_posting_read(dev_priv, pp_ctrl_reg);
+		if (IS_CHERRYVIEW(dev_priv))
+			intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe);
+		else
+			intel_dp->DP |= DP_PIPE_SEL(crtc->pipe);
 	}
 }
 
+
 /* Enable backlight PWM and backlight PP control. */
 void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
 			    const struct drm_connector_state *conn_state)
@@ -3409,30 +2539,6 @@ void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
 	_intel_edp_backlight_on(intel_dp);
 }
 
-/* Disable backlight in the panel power control. */
-static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	intel_wakeref_t wakeref;
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	with_pps_lock(intel_dp, wakeref) {
-		i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
-		u32 pp;
-
-		pp = ilk_get_pp_control(intel_dp);
-		pp &= ~EDP_BLC_ENABLE;
-
-		intel_de_write(dev_priv, pp_ctrl_reg, pp);
-		intel_de_posting_read(dev_priv, pp_ctrl_reg);
-	}
-
-	intel_dp->last_backlight_off = jiffies;
-	edp_wait_backlight_off(intel_dp);
-}
-
 /* Disable backlight PP control and backlight PWM. */
 void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
 {
@@ -3448,33 +2554,6 @@ void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
 	intel_panel_disable_backlight(old_conn_state);
 }
 
-/*
- * Hook for controlling the panel power control backlight through the bl_power
- * sysfs attribute. Take care to handle multiple calls.
- */
-static void intel_edp_backlight_power(struct intel_connector *connector,
-				      bool enable)
-{
-	struct drm_i915_private *i915 = to_i915(connector->base.dev);
-	struct intel_dp *intel_dp = intel_attached_dp(connector);
-	intel_wakeref_t wakeref;
-	bool is_enabled;
-
-	is_enabled = false;
-	with_pps_lock(intel_dp, wakeref)
-		is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
-	if (is_enabled == enable)
-		return;
-
-	drm_dbg_kms(&i915->drm, "panel power control backlight %s\n",
-		    enable ? "enable" : "disable");
-
-	if (enable)
-		_intel_edp_backlight_on(intel_dp);
-	else
-		_intel_edp_backlight_off(intel_dp);
-}
-
 static void assert_dp_port(struct intel_dp *intel_dp, bool state)
 {
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
@@ -4139,112 +3218,6 @@ static void g4x_pre_enable_dp(struct intel_atomic_state *state,
 		ilk_edp_pll_on(intel_dp, pipe_config);
 }
 
-static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
-{
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
-	enum pipe pipe = intel_dp->pps_pipe;
-	i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
-
-	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
-
-	if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B))
-		return;
-
-	edp_panel_vdd_off_sync(intel_dp);
-
-	/*
-	 * VLV seems to get confused when multiple power sequencers
-	 * have the same port selected (even if only one has power/vdd
-	 * enabled). The failure manifests as vlv_wait_port_ready() failing
-	 * CHV on the other hand doesn't seem to mind having the same port
-	 * selected in multiple power sequencers, but let's clear the
-	 * port select always when logically disconnecting a power sequencer
-	 * from a port.
-	 */
-	drm_dbg_kms(&dev_priv->drm,
-		    "detaching pipe %c power sequencer from [ENCODER:%d:%s]\n",
-		    pipe_name(pipe), dig_port->base.base.base.id,
-		    dig_port->base.base.name);
-	intel_de_write(dev_priv, pp_on_reg, 0);
-	intel_de_posting_read(dev_priv, pp_on_reg);
-
-	intel_dp->pps_pipe = INVALID_PIPE;
-}
-
-static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
-				      enum pipe pipe)
-{
-	struct intel_encoder *encoder;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	for_each_intel_dp(&dev_priv->drm, encoder) {
-		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
-		drm_WARN(&dev_priv->drm, intel_dp->active_pipe == pipe,
-			 "stealing pipe %c power sequencer from active [ENCODER:%d:%s]\n",
-			 pipe_name(pipe), encoder->base.base.id,
-			 encoder->base.name);
-
-		if (intel_dp->pps_pipe != pipe)
-			continue;
-
-		drm_dbg_kms(&dev_priv->drm,
-			    "stealing pipe %c power sequencer from [ENCODER:%d:%s]\n",
-			    pipe_name(pipe), encoder->base.base.id,
-			    encoder->base.name);
-
-		/* make sure vdd is off before we steal it */
-		vlv_detach_power_sequencer(intel_dp);
-	}
-}
-
-static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
-					   const struct intel_crtc_state *crtc_state)
-{
-	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
-
-	if (intel_dp->pps_pipe != INVALID_PIPE &&
-	    intel_dp->pps_pipe != crtc->pipe) {
-		/*
-		 * If another power sequencer was being used on this
-		 * port previously make sure to turn off vdd there while
-		 * we still have control of it.
-		 */
-		vlv_detach_power_sequencer(intel_dp);
-	}
-
-	/*
-	 * We may be stealing the power
-	 * sequencer from another port.
-	 */
-	vlv_steal_power_sequencer(dev_priv, crtc->pipe);
-
-	intel_dp->active_pipe = crtc->pipe;
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
-
-	/* now it's all ours */
-	intel_dp->pps_pipe = crtc->pipe;
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "initializing pipe %c power sequencer for [ENCODER:%d:%s]\n",
-		    pipe_name(intel_dp->pps_pipe), encoder->base.base.id,
-		    encoder->base.name);
-
-	/* init power sequencer on this pipe and port */
-	intel_dp_init_panel_power_sequencer(intel_dp);
-	intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
-}
-
 static void vlv_pre_enable_dp(struct intel_atomic_state *state,
 			      struct intel_encoder *encoder,
 			      const struct intel_crtc_state *pipe_config,
@@ -6888,31 +5861,6 @@ void intel_dp_encoder_shutdown(struct intel_encoder *intel_encoder)
 		wait_panel_power_cycle(intel_dp);
 }
 
-static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	if (!edp_have_panel_vdd(intel_dp))
-		return;
-
-	/*
-	 * The VDD bit needs a power domain reference, so if the bit is
-	 * already enabled when we boot or resume, grab this reference and
-	 * schedule a vdd off, so we don't hold on to the reference
-	 * indefinitely.
-	 */
-	drm_dbg_kms(&dev_priv->drm,
-		    "VDD left on by BIOS, adjusting state tracking\n");
-	drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
-	intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
-							intel_aux_power_domain(dig_port));
-
-	edp_panel_vdd_schedule_off(intel_dp);
-}
-
 static enum pipe vlv_active_pipe(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
@@ -7118,19 +6066,6 @@ static const struct drm_encoder_funcs intel_dp_enc_funcs = {
 	.destroy = intel_dp_encoder_destroy,
 };
 
-static bool intel_edp_have_power(struct intel_dp *intel_dp)
-{
-	intel_wakeref_t wakeref;
-	bool have_power = false;
-
-	with_pps_lock(intel_dp, wakeref) {
-		have_power = edp_have_panel_power(intel_dp) &&
-						  edp_have_panel_vdd(intel_dp);
-	}
-
-	return have_power;
-}
-
 enum irqreturn
 intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd)
 {
@@ -7234,277 +6169,6 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
 	}
 }
 
-static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
-{
-	intel_dp->panel_power_off_time = ktime_get_boottime();
-	intel_dp->last_power_on = jiffies;
-	intel_dp->last_backlight_off = jiffies;
-}
-
-static void
-intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 pp_on, pp_off, pp_ctl;
-	struct pps_registers regs;
-
-	intel_pps_get_registers(intel_dp, &regs);
-
-	pp_ctl = ilk_get_pp_control(intel_dp);
-
-	/* Ensure PPS is unlocked */
-	if (!HAS_DDI(dev_priv))
-		intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
-
-	pp_on = intel_de_read(dev_priv, regs.pp_on);
-	pp_off = intel_de_read(dev_priv, regs.pp_off);
-
-	/* Pull timing values out of registers */
-	seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
-	seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
-	seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
-	seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
-
-	if (i915_mmio_reg_valid(regs.pp_div)) {
-		u32 pp_div;
-
-		pp_div = intel_de_read(dev_priv, regs.pp_div);
-
-		seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
-	} else {
-		seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
-	}
-}
-
-static void
-intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
-{
-	DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
-		      state_name,
-		      seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
-}
-
-static void
-intel_pps_verify_state(struct intel_dp *intel_dp)
-{
-	struct edp_power_seq hw;
-	struct edp_power_seq *sw = &intel_dp->pps_delays;
-
-	intel_pps_readout_hw_state(intel_dp, &hw);
-
-	if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
-	    hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
-		DRM_ERROR("PPS state mismatch\n");
-		intel_pps_dump_state("sw", sw);
-		intel_pps_dump_state("hw", &hw);
-	}
-}
-
-static void
-intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct edp_power_seq cur, vbt, spec,
-		*final = &intel_dp->pps_delays;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	/* already initialized? */
-	if (final->t11_t12 != 0)
-		return;
-
-	intel_pps_readout_hw_state(intel_dp, &cur);
-
-	intel_pps_dump_state("cur", &cur);
-
-	vbt = dev_priv->vbt.edp.pps;
-	/* On Toshiba Satellite P50-C-18C system the VBT T12 delay
-	 * of 500ms appears to be too short. Ocassionally the panel
-	 * just fails to power back on. Increasing the delay to 800ms
-	 * seems sufficient to avoid this problem.
-	 */
-	if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
-		vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
-		drm_dbg_kms(&dev_priv->drm,
-			    "Increasing T12 panel delay as per the quirk to %d\n",
-			    vbt.t11_t12);
-	}
-	/* T11_T12 delay is special and actually in units of 100ms, but zero
-	 * based in the hw (so we need to add 100 ms). But the sw vbt
-	 * table multiplies it with 1000 to make it in units of 100usec,
-	 * too. */
-	vbt.t11_t12 += 100 * 10;
-
-	/* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
-	 * our hw here, which are all in 100usec. */
-	spec.t1_t3 = 210 * 10;
-	spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
-	spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
-	spec.t10 = 500 * 10;
-	/* This one is special and actually in units of 100ms, but zero
-	 * based in the hw (so we need to add 100 ms). But the sw vbt
-	 * table multiplies it with 1000 to make it in units of 100usec,
-	 * too. */
-	spec.t11_t12 = (510 + 100) * 10;
-
-	intel_pps_dump_state("vbt", &vbt);
-
-	/* Use the max of the register settings and vbt. If both are
-	 * unset, fall back to the spec limits. */
-#define assign_final(field)	final->field = (max(cur.field, vbt.field) == 0 ? \
-				       spec.field : \
-				       max(cur.field, vbt.field))
-	assign_final(t1_t3);
-	assign_final(t8);
-	assign_final(t9);
-	assign_final(t10);
-	assign_final(t11_t12);
-#undef assign_final
-
-#define get_delay(field)	(DIV_ROUND_UP(final->field, 10))
-	intel_dp->panel_power_up_delay = get_delay(t1_t3);
-	intel_dp->backlight_on_delay = get_delay(t8);
-	intel_dp->backlight_off_delay = get_delay(t9);
-	intel_dp->panel_power_down_delay = get_delay(t10);
-	intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
-#undef get_delay
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "panel power up delay %d, power down delay %d, power cycle delay %d\n",
-		    intel_dp->panel_power_up_delay,
-		    intel_dp->panel_power_down_delay,
-		    intel_dp->panel_power_cycle_delay);
-
-	drm_dbg_kms(&dev_priv->drm, "backlight on delay %d, off delay %d\n",
-		    intel_dp->backlight_on_delay,
-		    intel_dp->backlight_off_delay);
-
-	/*
-	 * We override the HW backlight delays to 1 because we do manual waits
-	 * on them. For T8, even BSpec recommends doing it. For T9, if we
-	 * don't do this, we'll end up waiting for the backlight off delay
-	 * twice: once when we do the manual sleep, and once when we disable
-	 * the panel and wait for the PP_STATUS bit to become zero.
-	 */
-	final->t8 = 1;
-	final->t9 = 1;
-
-	/*
-	 * HW has only a 100msec granularity for t11_t12 so round it up
-	 * accordingly.
-	 */
-	final->t11_t12 = roundup(final->t11_t12, 100 * 10);
-}
-
-static void
-intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
-					      bool force_disable_vdd)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 pp_on, pp_off, port_sel = 0;
-	int div = RUNTIME_INFO(dev_priv)->rawclk_freq / 1000;
-	struct pps_registers regs;
-	enum port port = dp_to_dig_port(intel_dp)->base.port;
-	const struct edp_power_seq *seq = &intel_dp->pps_delays;
-
-	lockdep_assert_held(&dev_priv->pps_mutex);
-
-	intel_pps_get_registers(intel_dp, &regs);
-
-	/*
-	 * On some VLV machines the BIOS can leave the VDD
-	 * enabled even on power sequencers which aren't
-	 * hooked up to any port. This would mess up the
-	 * power domain tracking the first time we pick
-	 * one of these power sequencers for use since
-	 * edp_panel_vdd_on() would notice that the VDD was
-	 * already on and therefore wouldn't grab the power
-	 * domain reference. Disable VDD first to avoid this.
-	 * This also avoids spuriously turning the VDD on as
-	 * soon as the new power sequencer gets initialized.
-	 */
-	if (force_disable_vdd) {
-		u32 pp = ilk_get_pp_control(intel_dp);
-
-		drm_WARN(&dev_priv->drm, pp & PANEL_POWER_ON,
-			 "Panel power already on\n");
-
-		if (pp & EDP_FORCE_VDD)
-			drm_dbg_kms(&dev_priv->drm,
-				    "VDD already on, disabling first\n");
-
-		pp &= ~EDP_FORCE_VDD;
-
-		intel_de_write(dev_priv, regs.pp_ctrl, pp);
-	}
-
-	pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
-		REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
-	pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
-		REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
-
-	/* Haswell doesn't have any port selection bits for the panel
-	 * power sequencer any more. */
-	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
-		port_sel = PANEL_PORT_SELECT_VLV(port);
-	} else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
-		switch (port) {
-		case PORT_A:
-			port_sel = PANEL_PORT_SELECT_DPA;
-			break;
-		case PORT_C:
-			port_sel = PANEL_PORT_SELECT_DPC;
-			break;
-		case PORT_D:
-			port_sel = PANEL_PORT_SELECT_DPD;
-			break;
-		default:
-			MISSING_CASE(port);
-			break;
-		}
-	}
-
-	pp_on |= port_sel;
-
-	intel_de_write(dev_priv, regs.pp_on, pp_on);
-	intel_de_write(dev_priv, regs.pp_off, pp_off);
-
-	/*
-	 * Compute the divisor for the pp clock, simply match the Bspec formula.
-	 */
-	if (i915_mmio_reg_valid(regs.pp_div)) {
-		intel_de_write(dev_priv, regs.pp_div,
-			       REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
-	} else {
-		u32 pp_ctl;
-
-		pp_ctl = intel_de_read(dev_priv, regs.pp_ctrl);
-		pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
-		pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
-		intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
-	}
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
-		    intel_de_read(dev_priv, regs.pp_on),
-		    intel_de_read(dev_priv, regs.pp_off),
-		    i915_mmio_reg_valid(regs.pp_div) ?
-		    intel_de_read(dev_priv, regs.pp_div) :
-		    (intel_de_read(dev_priv, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
-}
-
-static void intel_dp_pps_init(struct intel_dp *intel_dp)
-{
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-
-	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
-		vlv_initial_power_sequencer_setup(intel_dp);
-	} else {
-		intel_dp_init_panel_power_sequencer(intel_dp);
-		intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
-	}
-}
-
 /**
  * intel_dp_set_drrs_state - program registers for RR switch to take effect
  * @dev_priv: i915 device
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index b871a09b6901..87ace5d7f447 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -69,15 +69,11 @@ enum irqreturn intel_dp_hpd_pulse(struct intel_digital_port *dig_port,
 void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
 			    const struct drm_connector_state *conn_state);
 void intel_edp_backlight_off(const struct drm_connector_state *conn_state);
-void intel_edp_panel_vdd_on(struct intel_dp *intel_dp);
-void intel_edp_panel_on(struct intel_dp *intel_dp);
-void intel_edp_panel_off(struct intel_dp *intel_dp);
 void intel_dp_mst_suspend(struct drm_i915_private *dev_priv);
 void intel_dp_mst_resume(struct drm_i915_private *dev_priv);
 int intel_dp_max_link_rate(struct intel_dp *intel_dp);
 int intel_dp_max_lane_count(struct intel_dp *intel_dp);
 int intel_dp_rate_select(struct intel_dp *intel_dp, int rate);
-void intel_power_sequencer_reset(struct drm_i915_private *dev_priv);
 u32 intel_dp_pack_aux(const u8 *src, int src_bytes);
 
 void intel_edp_drrs_enable(struct intel_dp *intel_dp,
@@ -143,5 +139,6 @@ bool intel_dp_initial_fastset_check(struct intel_encoder *encoder,
 				    struct intel_crtc_state *crtc_state);
 void intel_dp_sync_state(struct intel_encoder *encoder,
 			 const struct intel_crtc_state *crtc_state);
+const struct dpll *vlv_get_dpll(struct drm_i915_private *i915);
 
 #endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
new file mode 100644
index 000000000000..cfe347076031
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pps.c
@@ -0,0 +1,1337 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "intel_display_types.h"
+#include "intel_dp.h"
+#include "intel_pps.h"
+
+static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
+				      enum pipe pipe);
+static void
+intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp);
+static void
+intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
+					      bool force_disable_vdd);
+
+intel_wakeref_t pps_lock(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	intel_wakeref_t wakeref;
+
+	/*
+	 * See intel_power_sequencer_reset() why we need
+	 * a power domain reference here.
+	 */
+	wakeref = intel_display_power_get(dev_priv,
+					  intel_aux_power_domain(dp_to_dig_port(intel_dp)));
+
+	mutex_lock(&dev_priv->pps_mutex);
+
+	return wakeref;
+}
+
+intel_wakeref_t pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	mutex_unlock(&dev_priv->pps_mutex);
+	intel_display_power_put(dev_priv,
+				intel_aux_power_domain(dp_to_dig_port(intel_dp)),
+				wakeref);
+	return 0;
+}
+
+static void
+vlv_power_sequencer_kick(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum pipe pipe = intel_dp->pps_pipe;
+	bool pll_enabled, release_cl_override = false;
+	enum dpio_phy phy = DPIO_PHY(pipe);
+	enum dpio_channel ch = vlv_pipe_to_channel(pipe);
+	u32 DP;
+
+	if (drm_WARN(&dev_priv->drm,
+		     intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN,
+		     "skipping pipe %c power sequencer kick due to [ENCODER:%d:%s] being active\n",
+		     pipe_name(pipe), dig_port->base.base.base.id,
+		     dig_port->base.base.name))
+		return;
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "kicking pipe %c power sequencer for [ENCODER:%d:%s]\n",
+		    pipe_name(pipe), dig_port->base.base.base.id,
+		    dig_port->base.base.name);
+
+	/* Preserve the BIOS-computed detected bit. This is
+	 * supposed to be read-only.
+	 */
+	DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
+	DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
+	DP |= DP_PORT_WIDTH(1);
+	DP |= DP_LINK_TRAIN_PAT_1;
+
+	if (IS_CHERRYVIEW(dev_priv))
+		DP |= DP_PIPE_SEL_CHV(pipe);
+	else
+		DP |= DP_PIPE_SEL(pipe);
+
+	pll_enabled = intel_de_read(dev_priv, DPLL(pipe)) & DPLL_VCO_ENABLE;
+
+	/*
+	 * The DPLL for the pipe must be enabled for this to work.
+	 * So enable temporarily it if it's not already enabled.
+	 */
+	if (!pll_enabled) {
+		release_cl_override = IS_CHERRYVIEW(dev_priv) &&
+			!chv_phy_powergate_ch(dev_priv, phy, ch, true);
+
+		if (vlv_force_pll_on(dev_priv, pipe, vlv_get_dpll(dev_priv))) {
+			drm_err(&dev_priv->drm,
+				"Failed to force on pll for pipe %c!\n",
+				pipe_name(pipe));
+			return;
+		}
+	}
+
+	/*
+	 * Similar magic as in intel_dp_enable_port().
+	 * We _must_ do this port enable + disable trick
+	 * to make this power sequencer lock onto the port.
+	 * Otherwise even VDD force bit won't work.
+	 */
+	intel_de_write(dev_priv, intel_dp->output_reg, DP);
+	intel_de_posting_read(dev_priv, intel_dp->output_reg);
+
+	intel_de_write(dev_priv, intel_dp->output_reg, DP | DP_PORT_EN);
+	intel_de_posting_read(dev_priv, intel_dp->output_reg);
+
+	intel_de_write(dev_priv, intel_dp->output_reg, DP & ~DP_PORT_EN);
+	intel_de_posting_read(dev_priv, intel_dp->output_reg);
+
+	if (!pll_enabled) {
+		vlv_force_pll_off(dev_priv, pipe);
+
+		if (release_cl_override)
+			chv_phy_powergate_ch(dev_priv, phy, ch, false);
+	}
+}
+
+static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+	unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
+
+	/*
+	 * We don't have power sequencer currently.
+	 * Pick one that's not used by other ports.
+	 */
+	for_each_intel_dp(&dev_priv->drm, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+		if (encoder->type == INTEL_OUTPUT_EDP) {
+			drm_WARN_ON(&dev_priv->drm,
+				    intel_dp->active_pipe != INVALID_PIPE &&
+				    intel_dp->active_pipe !=
+				    intel_dp->pps_pipe);
+
+			if (intel_dp->pps_pipe != INVALID_PIPE)
+				pipes &= ~(1 << intel_dp->pps_pipe);
+		} else {
+			drm_WARN_ON(&dev_priv->drm,
+				    intel_dp->pps_pipe != INVALID_PIPE);
+
+			if (intel_dp->active_pipe != INVALID_PIPE)
+				pipes &= ~(1 << intel_dp->active_pipe);
+		}
+	}
+
+	if (pipes == 0)
+		return INVALID_PIPE;
+
+	return ffs(pipes) - 1;
+}
+
+static enum pipe
+vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum pipe pipe;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	/* We should never land here with regular DP ports */
+	drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
+
+	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE &&
+		    intel_dp->active_pipe != intel_dp->pps_pipe);
+
+	if (intel_dp->pps_pipe != INVALID_PIPE)
+		return intel_dp->pps_pipe;
+
+	pipe = vlv_find_free_pps(dev_priv);
+
+	/*
+	 * Didn't find one. This should not happen since there
+	 * are two power sequencers and up to two eDP ports.
+	 */
+	if (drm_WARN_ON(&dev_priv->drm, pipe == INVALID_PIPE))
+		pipe = PIPE_A;
+
+	vlv_steal_power_sequencer(dev_priv, pipe);
+	intel_dp->pps_pipe = pipe;
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "picked pipe %c power sequencer for [ENCODER:%d:%s]\n",
+		    pipe_name(intel_dp->pps_pipe),
+		    dig_port->base.base.base.id,
+		    dig_port->base.base.name);
+
+	/* init power sequencer on this pipe and port */
+	intel_dp_init_panel_power_sequencer(intel_dp);
+	intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
+
+	/*
+	 * Even vdd force doesn't work until we've made
+	 * the power sequencer lock in on the port.
+	 */
+	vlv_power_sequencer_kick(intel_dp);
+
+	return intel_dp->pps_pipe;
+}
+
+static int
+bxt_power_sequencer_idx(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	int backlight_controller = dev_priv->vbt.backlight.controller;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	/* We should never land here with regular DP ports */
+	drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
+
+	if (!intel_dp->pps_reset)
+		return backlight_controller;
+
+	intel_dp->pps_reset = false;
+
+	/*
+	 * Only the HW needs to be reprogrammed, the SW state is fixed and
+	 * has been setup during connector init.
+	 */
+	intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
+
+	return backlight_controller;
+}
+
+typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
+			       enum pipe pipe);
+
+static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
+			       enum pipe pipe)
+{
+	return intel_de_read(dev_priv, PP_STATUS(pipe)) & PP_ON;
+}
+
+static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
+				enum pipe pipe)
+{
+	return intel_de_read(dev_priv, PP_CONTROL(pipe)) & EDP_FORCE_VDD;
+}
+
+static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
+			 enum pipe pipe)
+{
+	return true;
+}
+
+static enum pipe
+vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
+		     enum port port,
+		     vlv_pipe_check pipe_check)
+{
+	enum pipe pipe;
+
+	for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
+		u32 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(pipe)) &
+			PANEL_PORT_SELECT_MASK;
+
+		if (port_sel != PANEL_PORT_SELECT_VLV(port))
+			continue;
+
+		if (!pipe_check(dev_priv, pipe))
+			continue;
+
+		return pipe;
+	}
+
+	return INVALID_PIPE;
+}
+
+static void
+vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	enum port port = dig_port->base.port;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	/* try to find a pipe with this port selected */
+	/* first pick one where the panel is on */
+	intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+						  vlv_pipe_has_pp_on);
+	/* didn't find one? pick one where vdd is on */
+	if (intel_dp->pps_pipe == INVALID_PIPE)
+		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+							  vlv_pipe_has_vdd_on);
+	/* didn't find one? pick one with just the correct port */
+	if (intel_dp->pps_pipe == INVALID_PIPE)
+		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+							  vlv_pipe_any);
+
+	/* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
+	if (intel_dp->pps_pipe == INVALID_PIPE) {
+		drm_dbg_kms(&dev_priv->drm,
+			    "no initial power sequencer for [ENCODER:%d:%s]\n",
+			    dig_port->base.base.base.id,
+			    dig_port->base.base.name);
+		return;
+	}
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "initial power sequencer for [ENCODER:%d:%s]: pipe %c\n",
+		    dig_port->base.base.base.id,
+		    dig_port->base.base.name,
+		    pipe_name(intel_dp->pps_pipe));
+
+	intel_dp_init_panel_power_sequencer(intel_dp);
+	intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
+}
+
+void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+
+	if (drm_WARN_ON(&dev_priv->drm,
+			!(IS_VALLEYVIEW(dev_priv) ||
+			  IS_CHERRYVIEW(dev_priv) ||
+			  IS_GEN9_LP(dev_priv))))
+		return;
+
+	/*
+	 * We can't grab pps_mutex here due to deadlock with power_domain
+	 * mutex when power_domain functions are called while holding pps_mutex.
+	 * That also means that in order to use pps_pipe the code needs to
+	 * hold both a power domain reference and pps_mutex, and the power domain
+	 * reference get/put must be done while _not_ holding pps_mutex.
+	 * pps_{lock,unlock}() do these steps in the correct order, so one
+	 * should use them always.
+	 */
+
+	for_each_intel_dp(&dev_priv->drm, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+		drm_WARN_ON(&dev_priv->drm,
+			    intel_dp->active_pipe != INVALID_PIPE);
+
+		if (encoder->type != INTEL_OUTPUT_EDP)
+			continue;
+
+		if (IS_GEN9_LP(dev_priv))
+			intel_dp->pps_reset = true;
+		else
+			intel_dp->pps_pipe = INVALID_PIPE;
+	}
+}
+
+struct pps_registers {
+	i915_reg_t pp_ctrl;
+	i915_reg_t pp_stat;
+	i915_reg_t pp_on;
+	i915_reg_t pp_off;
+	i915_reg_t pp_div;
+};
+
+static void intel_pps_get_registers(struct intel_dp *intel_dp,
+				    struct pps_registers *regs)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	int pps_idx = 0;
+
+	memset(regs, 0, sizeof(*regs));
+
+	if (IS_GEN9_LP(dev_priv))
+		pps_idx = bxt_power_sequencer_idx(intel_dp);
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		pps_idx = vlv_power_sequencer_pipe(intel_dp);
+
+	regs->pp_ctrl = PP_CONTROL(pps_idx);
+	regs->pp_stat = PP_STATUS(pps_idx);
+	regs->pp_on = PP_ON_DELAYS(pps_idx);
+	regs->pp_off = PP_OFF_DELAYS(pps_idx);
+
+	/* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
+	if (IS_GEN9_LP(dev_priv) || INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
+		regs->pp_div = INVALID_MMIO_REG;
+	else
+		regs->pp_div = PP_DIVISOR(pps_idx);
+}
+
+static i915_reg_t
+_pp_ctrl_reg(struct intel_dp *intel_dp)
+{
+	struct pps_registers regs;
+
+	intel_pps_get_registers(intel_dp, &regs);
+
+	return regs.pp_ctrl;
+}
+
+static i915_reg_t
+_pp_stat_reg(struct intel_dp *intel_dp)
+{
+	struct pps_registers regs;
+
+	intel_pps_get_registers(intel_dp, &regs);
+
+	return regs.pp_stat;
+}
+
+static bool edp_have_panel_power(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    intel_dp->pps_pipe == INVALID_PIPE)
+		return false;
+
+	return (intel_de_read(dev_priv, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
+}
+
+static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    intel_dp->pps_pipe == INVALID_PIPE)
+		return false;
+
+	return intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
+}
+
+void intel_dp_check_edp(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
+		drm_WARN(&dev_priv->drm, 1,
+			 "eDP powered off while attempting aux channel communication.\n");
+		drm_dbg_kms(&dev_priv->drm, "Status 0x%08x Control 0x%08x\n",
+			    intel_de_read(dev_priv, _pp_stat_reg(intel_dp)),
+			    intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)));
+	}
+}
+
+#define IDLE_ON_MASK		(PP_ON | PP_SEQUENCE_MASK | 0                     | PP_SEQUENCE_STATE_MASK)
+#define IDLE_ON_VALUE   	(PP_ON | PP_SEQUENCE_NONE | 0                     | PP_SEQUENCE_STATE_ON_IDLE)
+
+#define IDLE_OFF_MASK		(PP_ON | PP_SEQUENCE_MASK | 0                     | 0)
+#define IDLE_OFF_VALUE		(0     | PP_SEQUENCE_NONE | 0                     | 0)
+
+#define IDLE_CYCLE_MASK		(PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
+#define IDLE_CYCLE_VALUE	(0     | PP_SEQUENCE_NONE | 0                     | PP_SEQUENCE_STATE_OFF_IDLE)
+
+static void intel_pps_verify_state(struct intel_dp *intel_dp);
+
+static void wait_panel_status(struct intel_dp *intel_dp,
+				       u32 mask,
+				       u32 value)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	i915_reg_t pp_stat_reg, pp_ctrl_reg;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	intel_pps_verify_state(intel_dp);
+
+	pp_stat_reg = _pp_stat_reg(intel_dp);
+	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "mask %08x value %08x status %08x control %08x\n",
+		    mask, value,
+		    intel_de_read(dev_priv, pp_stat_reg),
+		    intel_de_read(dev_priv, pp_ctrl_reg));
+
+	if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
+				       mask, value, 5000))
+		drm_err(&dev_priv->drm,
+			"Panel status timeout: status %08x control %08x\n",
+			intel_de_read(dev_priv, pp_stat_reg),
+			intel_de_read(dev_priv, pp_ctrl_reg));
+
+	drm_dbg_kms(&dev_priv->drm, "Wait complete\n");
+}
+
+static void wait_panel_on(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	drm_dbg_kms(&i915->drm, "Wait for panel power on\n");
+	wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
+}
+
+static void wait_panel_off(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	drm_dbg_kms(&i915->drm, "Wait for panel power off time\n");
+	wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
+}
+
+void wait_panel_power_cycle(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	ktime_t panel_power_on_time;
+	s64 panel_power_off_duration;
+
+	drm_dbg_kms(&i915->drm, "Wait for panel power cycle\n");
+
+	/* take the difference of currrent time and panel power off time
+	 * and then make panel wait for t11_t12 if needed. */
+	panel_power_on_time = ktime_get_boottime();
+	panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
+
+	/* When we disable the VDD override bit last we have to do the manual
+	 * wait. */
+	if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
+		wait_remaining_ms_from_jiffies(jiffies,
+				       intel_dp->panel_power_cycle_delay - panel_power_off_duration);
+
+	wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
+}
+
+static void wait_backlight_on(struct intel_dp *intel_dp)
+{
+	wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
+				       intel_dp->backlight_on_delay);
+}
+
+static void edp_wait_backlight_off(struct intel_dp *intel_dp)
+{
+	wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
+				       intel_dp->backlight_off_delay);
+}
+
+/* Read the current pp_control value, unlocking the register if it
+ * is locked
+ */
+
+static  u32 ilk_get_pp_control(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 control;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
+	if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
+			(control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
+		control &= ~PANEL_UNLOCK_MASK;
+		control |= PANEL_UNLOCK_REGS;
+	}
+	return control;
+}
+
+/*
+ * Must be paired with edp_panel_vdd_off().
+ * Must hold pps_mutex around the whole on/off sequence.
+ * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
+ */
+bool edp_panel_vdd_on(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	u32 pp;
+	i915_reg_t pp_stat_reg, pp_ctrl_reg;
+	bool need_to_disable = !intel_dp->want_panel_vdd;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if (!intel_dp_is_edp(intel_dp))
+		return false;
+
+	cancel_delayed_work(&intel_dp->panel_vdd_work);
+	intel_dp->want_panel_vdd = true;
+
+	if (edp_have_panel_vdd(intel_dp))
+		return need_to_disable;
+
+	drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
+	intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
+							intel_aux_power_domain(dig_port));
+
+	drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD on\n",
+		    dig_port->base.base.base.id,
+		    dig_port->base.base.name);
+
+	if (!edp_have_panel_power(intel_dp))
+		wait_panel_power_cycle(intel_dp);
+
+	pp = ilk_get_pp_control(intel_dp);
+	pp |= EDP_FORCE_VDD;
+
+	pp_stat_reg = _pp_stat_reg(intel_dp);
+	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+
+	intel_de_write(dev_priv, pp_ctrl_reg, pp);
+	intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
+		    intel_de_read(dev_priv, pp_stat_reg),
+		    intel_de_read(dev_priv, pp_ctrl_reg));
+	/*
+	 * If the panel wasn't on, delay before accessing aux channel
+	 */
+	if (!edp_have_panel_power(intel_dp)) {
+		drm_dbg_kms(&dev_priv->drm,
+			    "[ENCODER:%d:%s] panel power wasn't enabled\n",
+			    dig_port->base.base.base.id,
+			    dig_port->base.base.name);
+		msleep(intel_dp->panel_power_up_delay);
+	}
+
+	return need_to_disable;
+}
+
+/*
+ * Must be paired with intel_edp_panel_vdd_off() or
+ * intel_edp_panel_off().
+ * Nested calls to these functions are not allowed since
+ * we drop the lock. Caller must use some higher level
+ * locking to prevent nested calls from other threads.
+ */
+void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
+{
+	intel_wakeref_t wakeref;
+	bool vdd;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	vdd = false;
+	with_pps_lock(intel_dp, wakeref)
+		vdd = edp_panel_vdd_on(intel_dp);
+	I915_STATE_WARN(!vdd, "[ENCODER:%d:%s] VDD already requested on\n",
+			dp_to_dig_port(intel_dp)->base.base.base.id,
+			dp_to_dig_port(intel_dp)->base.base.name);
+}
+
+void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port =
+		dp_to_dig_port(intel_dp);
+	u32 pp;
+	i915_reg_t pp_stat_reg, pp_ctrl_reg;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	drm_WARN_ON(&dev_priv->drm, intel_dp->want_panel_vdd);
+
+	if (!edp_have_panel_vdd(intel_dp))
+		return;
+
+	drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD off\n",
+		    dig_port->base.base.base.id,
+		    dig_port->base.base.name);
+
+	pp = ilk_get_pp_control(intel_dp);
+	pp &= ~EDP_FORCE_VDD;
+
+	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+	pp_stat_reg = _pp_stat_reg(intel_dp);
+
+	intel_de_write(dev_priv, pp_ctrl_reg, pp);
+	intel_de_posting_read(dev_priv, pp_ctrl_reg);
+
+	/* Make sure sequencer is idle before allowing subsequent activity */
+	drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
+		    intel_de_read(dev_priv, pp_stat_reg),
+		    intel_de_read(dev_priv, pp_ctrl_reg));
+
+	if ((pp & PANEL_POWER_ON) == 0)
+		intel_dp->panel_power_off_time = ktime_get_boottime();
+
+	intel_display_power_put(dev_priv,
+				intel_aux_power_domain(dig_port),
+				fetch_and_zero(&intel_dp->vdd_wakeref));
+}
+
+void edp_panel_vdd_work(struct work_struct *__work)
+{
+	struct intel_dp *intel_dp =
+		container_of(to_delayed_work(__work),
+			     struct intel_dp, panel_vdd_work);
+	intel_wakeref_t wakeref;
+
+	with_pps_lock(intel_dp, wakeref) {
+		if (!intel_dp->want_panel_vdd)
+			edp_panel_vdd_off_sync(intel_dp);
+	}
+}
+
+static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
+{
+	unsigned long delay;
+
+	/*
+	 * Queue the timer to fire a long time from now (relative to the power
+	 * down delay) to keep the panel power up across a sequence of
+	 * operations.
+	 */
+	delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
+	schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
+}
+
+/*
+ * Must be paired with edp_panel_vdd_on().
+ * Must hold pps_mutex around the whole on/off sequence.
+ * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
+ */
+void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	I915_STATE_WARN(!intel_dp->want_panel_vdd, "[ENCODER:%d:%s] VDD not forced on",
+			dp_to_dig_port(intel_dp)->base.base.base.id,
+			dp_to_dig_port(intel_dp)->base.base.name);
+
+	intel_dp->want_panel_vdd = false;
+
+	if (sync)
+		edp_panel_vdd_off_sync(intel_dp);
+	else
+		edp_panel_vdd_schedule_off(intel_dp);
+}
+
+void edp_panel_on(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 pp;
+	i915_reg_t pp_ctrl_reg;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power on\n",
+		    dp_to_dig_port(intel_dp)->base.base.base.id,
+		    dp_to_dig_port(intel_dp)->base.base.name);
+
+	if (drm_WARN(&dev_priv->drm, edp_have_panel_power(intel_dp),
+		     "[ENCODER:%d:%s] panel power already on\n",
+		     dp_to_dig_port(intel_dp)->base.base.base.id,
+		     dp_to_dig_port(intel_dp)->base.base.name))
+		return;
+
+	wait_panel_power_cycle(intel_dp);
+
+	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+	pp = ilk_get_pp_control(intel_dp);
+	if (IS_GEN(dev_priv, 5)) {
+		/* ILK workaround: disable reset around power sequence */
+		pp &= ~PANEL_POWER_RESET;
+		intel_de_write(dev_priv, pp_ctrl_reg, pp);
+		intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	}
+
+	pp |= PANEL_POWER_ON;
+	if (!IS_GEN(dev_priv, 5))
+		pp |= PANEL_POWER_RESET;
+
+	intel_de_write(dev_priv, pp_ctrl_reg, pp);
+	intel_de_posting_read(dev_priv, pp_ctrl_reg);
+
+	wait_panel_on(intel_dp);
+	intel_dp->last_power_on = jiffies;
+
+	if (IS_GEN(dev_priv, 5)) {
+		pp |= PANEL_POWER_RESET; /* restore panel reset bit */
+		intel_de_write(dev_priv, pp_ctrl_reg, pp);
+		intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	}
+}
+
+void intel_edp_panel_on(struct intel_dp *intel_dp)
+{
+	intel_wakeref_t wakeref;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	with_pps_lock(intel_dp, wakeref)
+		edp_panel_on(intel_dp);
+}
+
+void edp_panel_off(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	u32 pp;
+	i915_reg_t pp_ctrl_reg;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power off\n",
+		    dig_port->base.base.base.id, dig_port->base.base.name);
+
+	drm_WARN(&dev_priv->drm, !intel_dp->want_panel_vdd,
+		 "Need [ENCODER:%d:%s] VDD to turn off panel\n",
+		 dig_port->base.base.base.id, dig_port->base.base.name);
+
+	pp = ilk_get_pp_control(intel_dp);
+	/* We need to switch off panel power _and_ force vdd, for otherwise some
+	 * panels get very unhappy and cease to work. */
+	pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
+		EDP_BLC_ENABLE);
+
+	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+
+	intel_dp->want_panel_vdd = false;
+
+	intel_de_write(dev_priv, pp_ctrl_reg, pp);
+	intel_de_posting_read(dev_priv, pp_ctrl_reg);
+
+	wait_panel_off(intel_dp);
+	intel_dp->panel_power_off_time = ktime_get_boottime();
+
+	/* We got a reference when we enabled the VDD. */
+	intel_display_power_put(dev_priv,
+				intel_aux_power_domain(dig_port),
+				fetch_and_zero(&intel_dp->vdd_wakeref));
+}
+
+void intel_edp_panel_off(struct intel_dp *intel_dp)
+{
+	intel_wakeref_t wakeref;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	with_pps_lock(intel_dp, wakeref)
+		edp_panel_off(intel_dp);
+}
+
+/* Enable backlight in the panel power control. */
+void _intel_edp_backlight_on(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	intel_wakeref_t wakeref;
+
+	/*
+	 * If we enable the backlight right away following a panel power
+	 * on, we may see slight flicker as the panel syncs with the eDP
+	 * link.  So delay a bit to make sure the image is solid before
+	 * allowing it to appear.
+	 */
+	wait_backlight_on(intel_dp);
+
+	with_pps_lock(intel_dp, wakeref) {
+		i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+		u32 pp;
+
+		pp = ilk_get_pp_control(intel_dp);
+		pp |= EDP_BLC_ENABLE;
+
+		intel_de_write(dev_priv, pp_ctrl_reg, pp);
+		intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	}
+}
+
+/* Disable backlight in the panel power control. */
+void _intel_edp_backlight_off(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	intel_wakeref_t wakeref;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	with_pps_lock(intel_dp, wakeref) {
+		i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
+		u32 pp;
+
+		pp = ilk_get_pp_control(intel_dp);
+		pp &= ~EDP_BLC_ENABLE;
+
+		intel_de_write(dev_priv, pp_ctrl_reg, pp);
+		intel_de_posting_read(dev_priv, pp_ctrl_reg);
+	}
+
+	intel_dp->last_backlight_off = jiffies;
+	edp_wait_backlight_off(intel_dp);
+}
+
+/*
+ * Hook for controlling the panel power control backlight through the bl_power
+ * sysfs attribute. Take care to handle multiple calls.
+ */
+void intel_edp_backlight_power(struct intel_connector *connector, bool enable)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	intel_wakeref_t wakeref;
+	bool is_enabled;
+
+	is_enabled = false;
+	with_pps_lock(intel_dp, wakeref)
+		is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
+	if (is_enabled == enable)
+		return;
+
+	drm_dbg_kms(&i915->drm, "panel power control backlight %s\n",
+		    enable ? "enable" : "disable");
+
+	if (enable)
+		_intel_edp_backlight_on(intel_dp);
+	else
+		_intel_edp_backlight_off(intel_dp);
+}
+
+static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
+{
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
+	enum pipe pipe = intel_dp->pps_pipe;
+	i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
+
+	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
+
+	if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B))
+		return;
+
+	edp_panel_vdd_off_sync(intel_dp);
+
+	/*
+	 * VLV seems to get confused when multiple power sequencers
+	 * have the same port selected (even if only one has power/vdd
+	 * enabled). The failure manifests as vlv_wait_port_ready() failing
+	 * CHV on the other hand doesn't seem to mind having the same port
+	 * selected in multiple power sequencers, but let's clear the
+	 * port select always when logically disconnecting a power sequencer
+	 * from a port.
+	 */
+	drm_dbg_kms(&dev_priv->drm,
+		    "detaching pipe %c power sequencer from [ENCODER:%d:%s]\n",
+		    pipe_name(pipe), dig_port->base.base.base.id,
+		    dig_port->base.base.name);
+	intel_de_write(dev_priv, pp_on_reg, 0);
+	intel_de_posting_read(dev_priv, pp_on_reg);
+
+	intel_dp->pps_pipe = INVALID_PIPE;
+}
+
+static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
+				      enum pipe pipe)
+{
+	struct intel_encoder *encoder;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	for_each_intel_dp(&dev_priv->drm, encoder) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+		drm_WARN(&dev_priv->drm, intel_dp->active_pipe == pipe,
+			 "stealing pipe %c power sequencer from active [ENCODER:%d:%s]\n",
+			 pipe_name(pipe), encoder->base.base.id,
+			 encoder->base.name);
+
+		if (intel_dp->pps_pipe != pipe)
+			continue;
+
+		drm_dbg_kms(&dev_priv->drm,
+			    "stealing pipe %c power sequencer from [ENCODER:%d:%s]\n",
+			    pipe_name(pipe), encoder->base.base.id,
+			    encoder->base.name);
+
+		/* make sure vdd is off before we steal it */
+		vlv_detach_power_sequencer(intel_dp);
+	}
+}
+
+void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
+
+	if (intel_dp->pps_pipe != INVALID_PIPE &&
+	    intel_dp->pps_pipe != crtc->pipe) {
+		/*
+		 * If another power sequencer was being used on this
+		 * port previously make sure to turn off vdd there while
+		 * we still have control of it.
+		 */
+		vlv_detach_power_sequencer(intel_dp);
+	}
+
+	/*
+	 * We may be stealing the power
+	 * sequencer from another port.
+	 */
+	vlv_steal_power_sequencer(dev_priv, crtc->pipe);
+
+	intel_dp->active_pipe = crtc->pipe;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	/* now it's all ours */
+	intel_dp->pps_pipe = crtc->pipe;
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "initializing pipe %c power sequencer for [ENCODER:%d:%s]\n",
+		    pipe_name(intel_dp->pps_pipe), encoder->base.base.id,
+		    encoder->base.name);
+
+	/* init power sequencer on this pipe and port */
+	intel_dp_init_panel_power_sequencer(intel_dp);
+	intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
+}
+
+void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	if (!edp_have_panel_vdd(intel_dp))
+		return;
+
+	/*
+	 * The VDD bit needs a power domain reference, so if the bit is
+	 * already enabled when we boot or resume, grab this reference and
+	 * schedule a vdd off, so we don't hold on to the reference
+	 * indefinitely.
+	 */
+	drm_dbg_kms(&dev_priv->drm,
+		    "VDD left on by BIOS, adjusting state tracking\n");
+	drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
+	intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
+							intel_aux_power_domain(dig_port));
+
+	edp_panel_vdd_schedule_off(intel_dp);
+}
+
+bool intel_edp_have_power(struct intel_dp *intel_dp)
+{
+	intel_wakeref_t wakeref;
+	bool have_power = false;
+
+	with_pps_lock(intel_dp, wakeref) {
+		have_power = edp_have_panel_power(intel_dp) &&
+						  edp_have_panel_vdd(intel_dp);
+	}
+
+	return have_power;
+}
+
+void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
+{
+	intel_dp->panel_power_off_time = ktime_get_boottime();
+	intel_dp->last_power_on = jiffies;
+	intel_dp->last_backlight_off = jiffies;
+}
+
+static void
+intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 pp_on, pp_off, pp_ctl;
+	struct pps_registers regs;
+
+	intel_pps_get_registers(intel_dp, &regs);
+
+	pp_ctl = ilk_get_pp_control(intel_dp);
+
+	/* Ensure PPS is unlocked */
+	if (!HAS_DDI(dev_priv))
+		intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
+
+	pp_on = intel_de_read(dev_priv, regs.pp_on);
+	pp_off = intel_de_read(dev_priv, regs.pp_off);
+
+	/* Pull timing values out of registers */
+	seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
+	seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
+	seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
+	seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
+
+	if (i915_mmio_reg_valid(regs.pp_div)) {
+		u32 pp_div;
+
+		pp_div = intel_de_read(dev_priv, regs.pp_div);
+
+		seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
+	} else {
+		seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
+	}
+}
+
+static void
+intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
+{
+	DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
+		      state_name,
+		      seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
+}
+
+static void
+intel_pps_verify_state(struct intel_dp *intel_dp)
+{
+	struct edp_power_seq hw;
+	struct edp_power_seq *sw = &intel_dp->pps_delays;
+
+	intel_pps_readout_hw_state(intel_dp, &hw);
+
+	if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
+	    hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
+		DRM_ERROR("PPS state mismatch\n");
+		intel_pps_dump_state("sw", sw);
+		intel_pps_dump_state("hw", &hw);
+	}
+}
+
+static void
+intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct edp_power_seq cur, vbt, spec,
+		*final = &intel_dp->pps_delays;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	/* already initialized? */
+	if (final->t11_t12 != 0)
+		return;
+
+	intel_pps_readout_hw_state(intel_dp, &cur);
+
+	intel_pps_dump_state("cur", &cur);
+
+	vbt = dev_priv->vbt.edp.pps;
+	/* On Toshiba Satellite P50-C-18C system the VBT T12 delay
+	 * of 500ms appears to be too short. Ocassionally the panel
+	 * just fails to power back on. Increasing the delay to 800ms
+	 * seems sufficient to avoid this problem.
+	 */
+	if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
+		vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
+		drm_dbg_kms(&dev_priv->drm,
+			    "Increasing T12 panel delay as per the quirk to %d\n",
+			    vbt.t11_t12);
+	}
+	/* T11_T12 delay is special and actually in units of 100ms, but zero
+	 * based in the hw (so we need to add 100 ms). But the sw vbt
+	 * table multiplies it with 1000 to make it in units of 100usec,
+	 * too. */
+	vbt.t11_t12 += 100 * 10;
+
+	/* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
+	 * our hw here, which are all in 100usec. */
+	spec.t1_t3 = 210 * 10;
+	spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
+	spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
+	spec.t10 = 500 * 10;
+	/* This one is special and actually in units of 100ms, but zero
+	 * based in the hw (so we need to add 100 ms). But the sw vbt
+	 * table multiplies it with 1000 to make it in units of 100usec,
+	 * too. */
+	spec.t11_t12 = (510 + 100) * 10;
+
+	intel_pps_dump_state("vbt", &vbt);
+
+	/* Use the max of the register settings and vbt. If both are
+	 * unset, fall back to the spec limits. */
+#define assign_final(field)	final->field = (max(cur.field, vbt.field) == 0 ? \
+				       spec.field : \
+				       max(cur.field, vbt.field))
+	assign_final(t1_t3);
+	assign_final(t8);
+	assign_final(t9);
+	assign_final(t10);
+	assign_final(t11_t12);
+#undef assign_final
+
+#define get_delay(field)	(DIV_ROUND_UP(final->field, 10))
+	intel_dp->panel_power_up_delay = get_delay(t1_t3);
+	intel_dp->backlight_on_delay = get_delay(t8);
+	intel_dp->backlight_off_delay = get_delay(t9);
+	intel_dp->panel_power_down_delay = get_delay(t10);
+	intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
+#undef get_delay
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "panel power up delay %d, power down delay %d, power cycle delay %d\n",
+		    intel_dp->panel_power_up_delay,
+		    intel_dp->panel_power_down_delay,
+		    intel_dp->panel_power_cycle_delay);
+
+	drm_dbg_kms(&dev_priv->drm, "backlight on delay %d, off delay %d\n",
+		    intel_dp->backlight_on_delay,
+		    intel_dp->backlight_off_delay);
+
+	/*
+	 * We override the HW backlight delays to 1 because we do manual waits
+	 * on them. For T8, even BSpec recommends doing it. For T9, if we
+	 * don't do this, we'll end up waiting for the backlight off delay
+	 * twice: once when we do the manual sleep, and once when we disable
+	 * the panel and wait for the PP_STATUS bit to become zero.
+	 */
+	final->t8 = 1;
+	final->t9 = 1;
+
+	/*
+	 * HW has only a 100msec granularity for t11_t12 so round it up
+	 * accordingly.
+	 */
+	final->t11_t12 = roundup(final->t11_t12, 100 * 10);
+}
+
+static void
+intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
+					      bool force_disable_vdd)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 pp_on, pp_off, port_sel = 0;
+	int div = RUNTIME_INFO(dev_priv)->rawclk_freq / 1000;
+	struct pps_registers regs;
+	enum port port = dp_to_dig_port(intel_dp)->base.port;
+	const struct edp_power_seq *seq = &intel_dp->pps_delays;
+
+	lockdep_assert_held(&dev_priv->pps_mutex);
+
+	intel_pps_get_registers(intel_dp, &regs);
+
+	/*
+	 * On some VLV machines the BIOS can leave the VDD
+	 * enabled even on power sequencers which aren't
+	 * hooked up to any port. This would mess up the
+	 * power domain tracking the first time we pick
+	 * one of these power sequencers for use since
+	 * edp_panel_vdd_on() would notice that the VDD was
+	 * already on and therefore wouldn't grab the power
+	 * domain reference. Disable VDD first to avoid this.
+	 * This also avoids spuriously turning the VDD on as
+	 * soon as the new power sequencer gets initialized.
+	 */
+	if (force_disable_vdd) {
+		u32 pp = ilk_get_pp_control(intel_dp);
+
+		drm_WARN(&dev_priv->drm, pp & PANEL_POWER_ON,
+			 "Panel power already on\n");
+
+		if (pp & EDP_FORCE_VDD)
+			drm_dbg_kms(&dev_priv->drm,
+				    "VDD already on, disabling first\n");
+
+		pp &= ~EDP_FORCE_VDD;
+
+		intel_de_write(dev_priv, regs.pp_ctrl, pp);
+	}
+
+	pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
+		REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
+	pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
+		REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
+
+	/* Haswell doesn't have any port selection bits for the panel
+	 * power sequencer any more. */
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		port_sel = PANEL_PORT_SELECT_VLV(port);
+	} else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
+		switch (port) {
+		case PORT_A:
+			port_sel = PANEL_PORT_SELECT_DPA;
+			break;
+		case PORT_C:
+			port_sel = PANEL_PORT_SELECT_DPC;
+			break;
+		case PORT_D:
+			port_sel = PANEL_PORT_SELECT_DPD;
+			break;
+		default:
+			MISSING_CASE(port);
+			break;
+		}
+	}
+
+	pp_on |= port_sel;
+
+	intel_de_write(dev_priv, regs.pp_on, pp_on);
+	intel_de_write(dev_priv, regs.pp_off, pp_off);
+
+	/*
+	 * Compute the divisor for the pp clock, simply match the Bspec formula.
+	 */
+	if (i915_mmio_reg_valid(regs.pp_div)) {
+		intel_de_write(dev_priv, regs.pp_div,
+			       REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
+	} else {
+		u32 pp_ctl;
+
+		pp_ctl = intel_de_read(dev_priv, regs.pp_ctrl);
+		pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
+		pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
+		intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
+	}
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
+		    intel_de_read(dev_priv, regs.pp_on),
+		    intel_de_read(dev_priv, regs.pp_off),
+		    i915_mmio_reg_valid(regs.pp_div) ?
+		    intel_de_read(dev_priv, regs.pp_div) :
+		    (intel_de_read(dev_priv, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
+}
+
+void intel_dp_pps_init(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		vlv_initial_power_sequencer_setup(intel_dp);
+	} else {
+		intel_dp_init_panel_power_sequencer(intel_dp);
+		intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_pps.h b/drivers/gpu/drm/i915/display/intel_pps.h
new file mode 100644
index 000000000000..76d5cc565501
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pps.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef __INTEL_PPS_H__
+#define __INTEL_PPS_H__
+
+#include <linux/types.h>
+
+#include "intel_wakeref.h"
+
+struct drm_i915_private;
+struct intel_connector;
+struct intel_crtc_state;
+struct intel_dp;
+struct intel_encoder;
+
+intel_wakeref_t pps_lock(struct intel_dp *intel_dp);
+intel_wakeref_t pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref);
+
+#define with_pps_lock(dp, wf)						\
+	for ((wf) = pps_lock(dp); (wf); (wf) = pps_unlock((dp), (wf)))
+
+void intel_dp_check_edp(struct intel_dp *intel_dp);
+void _intel_edp_backlight_on(struct intel_dp *intel_dp);
+void _intel_edp_backlight_off(struct intel_dp *intel_dp);
+void intel_edp_backlight_power(struct intel_connector *connector, bool enable);
+
+bool edp_panel_vdd_on(struct intel_dp *intel_dp);
+void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
+void edp_panel_vdd_off_sync(struct intel_dp *intel_dp);
+void edp_panel_on(struct intel_dp *intel_dp);
+void edp_panel_off(struct intel_dp *intel_dp);
+void edp_panel_vdd_work(struct work_struct *__work);
+
+void intel_edp_panel_vdd_on(struct intel_dp *intel_dp);
+void intel_edp_panel_on(struct intel_dp *intel_dp);
+void intel_edp_panel_off(struct intel_dp *intel_dp);
+bool intel_edp_have_power(struct intel_dp *intel_dp);
+
+void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp);
+
+void wait_panel_power_cycle(struct intel_dp *intel_dp);
+
+void intel_dp_pps_init(struct intel_dp *intel_dp);
+void intel_power_sequencer_reset(struct drm_i915_private *i915);
+void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp);
+
+void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *crtc_state);
+
+#endif /* __INTEL_PPS_H__ */
-- 
2.20.1

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