[PATCH 04/13] drm/i915: Store a direct pointer to shared dpll in intel_crtc_state

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Change the type of intel_crtc_state->shared_dpll to be a pointer to a
shared dpll. With this there is no need to first convert the id stored
in the crtc state to a pointer in order to use it. It does introduce a
bit of hassle on doing the opposite.

The long term objective is to hide details about dpll ids behind the
shared dpll interface.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_ddi.c      |   4 +-
 drivers/gpu/drm/i915/intel_display.c  | 108 ++++++++++++++++++++++------------
 drivers/gpu/drm/i915/intel_dpll_mgr.c |  51 ++++++++++++----
 drivers/gpu/drm/i915/intel_drv.h      |  19 +++++-
 drivers/gpu/drm/i915/intel_lvds.c     |   2 +-
 5 files changed, 132 insertions(+), 52 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index eb6b55c..a2b33d0 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1209,6 +1209,7 @@ hsw_ddi_pll_select(struct intel_crtc *intel_crtc,
 		   struct intel_crtc_state *crtc_state,
 		   struct intel_encoder *intel_encoder)
 {
+	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
 	int clock = crtc_state->port_clock;
 
 	if (intel_encoder->type == INTEL_OUTPUT_HDMI) {
@@ -1244,7 +1245,8 @@ hsw_ddi_pll_select(struct intel_crtc *intel_crtc,
 		    WARN_ON(spll->hw_state.spll != crtc_state->dpll_hw_state.spll))
 			return false;
 
-		crtc_state->shared_dpll = DPLL_ID_SPLL;
+		crtc_state->shared_dpll =
+			intel_get_shared_dpll_by_id(dev_priv, DPLL_ID_SPLL);
 		spll->hw_state.spll = crtc_state->dpll_hw_state.spll;
 		spll->crtc_mask |= 1 << intel_crtc->pipe;
 	}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index df49324..e723323 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1828,8 +1828,7 @@ static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
 	BUG_ON(!HAS_PCH_SPLIT(dev));
 
 	/* Make sure PCH DPLL is enabled */
-	assert_shared_dpll_enabled(dev_priv,
-				   intel_crtc_to_shared_dpll(intel_crtc));
+	assert_shared_dpll_enabled(dev_priv, intel_crtc->config->shared_dpll);
 
 	/* FDI must be feeding us bits for PCH ports */
 	assert_fdi_tx_enabled(dev_priv, pipe);
@@ -4024,7 +4023,8 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
 		temp = I915_READ(PCH_DPLL_SEL);
 		temp |= TRANS_DPLL_ENABLE(pipe);
 		sel = TRANS_DPLLB_SEL(pipe);
-		if (intel_crtc->config->shared_dpll == DPLL_ID_PCH_PLL_B)
+		if (intel_crtc->config->shared_dpll ==
+		    intel_get_shared_dpll_by_id(dev_priv, DPLL_ID_PCH_PLL_B))
 			temp |= sel;
 		else
 			temp &= ~sel;
@@ -4724,7 +4724,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
 						      false);
 
-	if (intel_crtc_to_shared_dpll(intel_crtc))
+	if (intel_crtc->config->shared_dpll)
 		intel_enable_shared_dpll(intel_crtc);
 
 	if (intel_crtc->config->has_dp_encoder)
@@ -7891,7 +7891,7 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
 		return false;
 
 	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
-	pipe_config->shared_dpll = DPLL_ID_PRIVATE;
+	pipe_config->shared_dpll = NULL;
 
 	ret = false;
 
@@ -9095,7 +9095,7 @@ static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
 		return false;
 
 	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
-	pipe_config->shared_dpll = DPLL_ID_PRIVATE;
+	pipe_config->shared_dpll = NULL;
 
 	ret = false;
 	tmp = I915_READ(PIPECONF(crtc->pipe));
@@ -9124,6 +9124,7 @@ static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
 
 	if (I915_READ(PCH_TRANSCONF(crtc->pipe)) & TRANS_ENABLE) {
 		struct intel_shared_dpll *pll;
+		enum intel_dpll_id pll_id;
 
 		pipe_config->has_pch_encoder = true;
 
@@ -9134,17 +9135,18 @@ static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
 		ironlake_get_fdi_m_n_config(crtc, pipe_config);
 
 		if (HAS_PCH_IBX(dev_priv->dev)) {
-			pipe_config->shared_dpll =
-				(enum intel_dpll_id) crtc->pipe;
+			pll_id = (enum intel_dpll_id) crtc->pipe;
 		} else {
 			tmp = I915_READ(PCH_DPLL_SEL);
 			if (tmp & TRANS_DPLLB_SEL(crtc->pipe))
-				pipe_config->shared_dpll = DPLL_ID_PCH_PLL_B;
+				pll_id = DPLL_ID_PCH_PLL_B;
 			else
-				pipe_config->shared_dpll = DPLL_ID_PCH_PLL_A;
+				pll_id= DPLL_ID_PCH_PLL_A;
 		}
 
-		pll = &dev_priv->shared_dplls[pipe_config->shared_dpll];
+		pipe_config->shared_dpll =
+			intel_get_shared_dpll_by_id(dev_priv, pll_id);
+		pll = pipe_config->shared_dpll;
 
 		WARN_ON(!pll->get_hw_state(dev_priv, pll,
 					   &pipe_config->dpll_hw_state));
@@ -9580,28 +9582,34 @@ static void bxt_get_ddi_pll(struct drm_i915_private *dev_priv,
 				enum port port,
 				struct intel_crtc_state *pipe_config)
 {
+	enum intel_dpll_id id;
+
 	switch (port) {
 	case PORT_A:
 		pipe_config->ddi_pll_sel = SKL_DPLL0;
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL1;
+		id = DPLL_ID_SKL_DPLL1;
 		break;
 	case PORT_B:
 		pipe_config->ddi_pll_sel = SKL_DPLL1;
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL2;
+		id = DPLL_ID_SKL_DPLL2;
 		break;
 	case PORT_C:
 		pipe_config->ddi_pll_sel = SKL_DPLL2;
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL3;
+		id = DPLL_ID_SKL_DPLL3;
 		break;
 	default:
 		DRM_ERROR("Incorrect port type\n");
+		return;
 	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
 }
 
 static void skylake_get_ddi_pll(struct drm_i915_private *dev_priv,
 				enum port port,
 				struct intel_crtc_state *pipe_config)
 {
+	enum intel_dpll_id id;
 	u32 temp, dpll_ctl1;
 
 	temp = I915_READ(DPLL_CTRL2) & DPLL_CTRL2_DDI_CLK_SEL_MASK(port);
@@ -9616,36 +9624,53 @@ static void skylake_get_ddi_pll(struct drm_i915_private *dev_priv,
 		 */
 		dpll_ctl1 = I915_READ(DPLL_CTRL1);
 		pipe_config->dpll_hw_state.ctrl1 = dpll_ctl1 & 0x3f;
-		break;
+		return;
 	case SKL_DPLL1:
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL1;
+		id = DPLL_ID_SKL_DPLL1;
 		break;
 	case SKL_DPLL2:
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL2;
+		id = DPLL_ID_SKL_DPLL2;
 		break;
 	case SKL_DPLL3:
-		pipe_config->shared_dpll = DPLL_ID_SKL_DPLL3;
+		id = DPLL_ID_SKL_DPLL3;
 		break;
+	default:
+		MISSING_CASE(pipe_config->ddi_pll_sel);
+		return;
 	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
 }
 
 static void haswell_get_ddi_pll(struct drm_i915_private *dev_priv,
 				enum port port,
 				struct intel_crtc_state *pipe_config)
 {
+	enum intel_dpll_id id;
+
 	pipe_config->ddi_pll_sel = I915_READ(PORT_CLK_SEL(port));
 
 	switch (pipe_config->ddi_pll_sel) {
 	case PORT_CLK_SEL_WRPLL1:
-		pipe_config->shared_dpll = DPLL_ID_WRPLL1;
+		id = DPLL_ID_WRPLL1;
 		break;
 	case PORT_CLK_SEL_WRPLL2:
-		pipe_config->shared_dpll = DPLL_ID_WRPLL2;
+		id = DPLL_ID_WRPLL2;
 		break;
 	case PORT_CLK_SEL_SPLL:
-		pipe_config->shared_dpll = DPLL_ID_SPLL;
+		id = DPLL_ID_SPLL;
 		break;
+	default:
+		MISSING_CASE(pipe_config->ddi_pll_sel);
+		/* fall through */
+	case PORT_CLK_SEL_NONE:
+	case PORT_CLK_SEL_LCPLL_810:
+	case PORT_CLK_SEL_LCPLL_1350:
+	case PORT_CLK_SEL_LCPLL_2700:
+		return;
 	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
 }
 
 static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
@@ -9668,9 +9693,8 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
 	else
 		haswell_get_ddi_pll(dev_priv, port, pipe_config);
 
-	if (pipe_config->shared_dpll >= 0) {
-		pll = &dev_priv->shared_dplls[pipe_config->shared_dpll];
-
+	pll = pipe_config->shared_dpll;
+	if (pll) {
 		WARN_ON(!pll->get_hw_state(dev_priv, pll,
 					   &pipe_config->dpll_hw_state));
 	}
@@ -9710,7 +9734,7 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
 	ret = false;
 
 	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
-	pipe_config->shared_dpll = DPLL_ID_PRIVATE;
+	pipe_config->shared_dpll = NULL;
 
 	tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
 	if (tmp & TRANS_DDI_FUNC_ENABLE) {
@@ -11702,7 +11726,7 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
 
 	if (mode_changed && crtc_state->enable &&
 	    dev_priv->display.crtc_compute_clock &&
-	    !WARN_ON(pipe_config->shared_dpll != DPLL_ID_PRIVATE)) {
+	    !WARN_ON(pipe_config->shared_dpll)) {
 		ret = dev_priv->display.crtc_compute_clock(intel_crtc,
 							   pipe_config);
 		if (ret)
@@ -12026,7 +12050,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
 	struct drm_crtc_state tmp_state;
 	struct intel_crtc_scaler_state scaler_state;
 	struct intel_dpll_hw_state dpll_hw_state;
-	enum intel_dpll_id shared_dpll;
+	struct intel_shared_dpll *shared_dpll;
 	uint32_t ddi_pll_sel;
 	bool force_thru;
 
@@ -12296,6 +12320,15 @@ intel_pipe_config_compare(struct drm_device *dev,
 		ret = false; \
 	}
 
+#define PIPE_CONF_CHECK_P(name)	\
+	if (current_config->name != pipe_config->name) { \
+		INTEL_ERR_OR_DBG_KMS("mismatch in " #name " " \
+			  "(expected %p, found %p)\n", \
+			  current_config->name, \
+			  pipe_config->name); \
+		ret = false; \
+	}
+
 #define PIPE_CONF_CHECK_M_N(name) \
 	if (!intel_compare_link_m_n(&current_config->name, \
 				    &pipe_config->name,\
@@ -12463,7 +12496,7 @@ intel_pipe_config_compare(struct drm_device *dev,
 
 	PIPE_CONF_CHECK_X(ddi_pll_sel);
 
-	PIPE_CONF_CHECK_I(shared_dpll);
+	PIPE_CONF_CHECK_P(shared_dpll);
 	PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
 	PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
 	PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
@@ -12482,6 +12515,7 @@ intel_pipe_config_compare(struct drm_device *dev,
 
 #undef PIPE_CONF_CHECK_X
 #undef PIPE_CONF_CHECK_I
+#undef PIPE_CONF_CHECK_P
 #undef PIPE_CONF_CHECK_I_ALT
 #undef PIPE_CONF_CHECK_FLAGS
 #undef PIPE_CONF_CHECK_CLOCK_FUZZY
@@ -12685,7 +12719,8 @@ check_shared_dpll_state(struct drm_device *dev)
 	int i;
 
 	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
-		struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
+		struct intel_shared_dpll *pll =
+			intel_get_shared_dpll_by_id(dev_priv, i);
 		int enabled_crtcs = 0, active_crtcs = 0;
 		bool active;
 
@@ -12707,9 +12742,9 @@ check_shared_dpll_state(struct drm_device *dev)
 		     pll->on, active);
 
 		for_each_intel_crtc(dev, crtc) {
-			if (crtc->base.state->enable && intel_crtc_to_shared_dpll(crtc) == pll)
+			if (crtc->base.state->enable && crtc->config->shared_dpll == pll)
 				enabled_crtcs++;
-			if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll)
+			if (crtc->active && crtc->config->shared_dpll == pll)
 				active_crtcs++;
 		}
 		I915_STATE_WARN(pll->active != active_crtcs,
@@ -12800,20 +12835,21 @@ static void intel_modeset_clear_plls(struct drm_atomic_state *state)
 
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-		int old_dpll = to_intel_crtc_state(crtc->state)->shared_dpll;
+		struct intel_shared_dpll *old_dpll =
+			to_intel_crtc_state(crtc->state)->shared_dpll;
 
 		if (!needs_modeset(crtc_state))
 			continue;
 
-		to_intel_crtc_state(crtc_state)->shared_dpll = DPLL_ID_PRIVATE;
+		to_intel_crtc_state(crtc_state)->shared_dpll = NULL;
 
-		if (old_dpll == DPLL_ID_PRIVATE)
+		if (!old_dpll)
 			continue;
 
 		if (!shared_dpll)
 			shared_dpll = intel_atomic_get_shared_dpll_state(state);
 
-		shared_dpll[old_dpll].crtc_mask &= ~(1 << intel_crtc->pipe);
+		intel_shared_dpll_config_put(shared_dpll, old_dpll, intel_crtc);
 	}
 }
 
@@ -15435,7 +15471,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 		pll->active = 0;
 		pll->config.crtc_mask = 0;
 		for_each_intel_crtc(dev, crtc) {
-			if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll) {
+			if (crtc->active && crtc->config->shared_dpll == pll) {
 				pll->active++;
 				pll->config.crtc_mask |= 1 << crtc->pipe;
 			}
diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 11effe3..889ceed 100644
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -24,14 +24,43 @@
 #include "intel_drv.h"
 
 struct intel_shared_dpll *
-intel_crtc_to_shared_dpll(struct intel_crtc *crtc)
+intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
+			    enum intel_dpll_id id)
 {
-	struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+	return &dev_priv->shared_dplls[id];
+}
 
-	if (crtc->config->shared_dpll < 0)
-		return NULL;
+enum intel_dpll_id
+intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
+			 struct intel_shared_dpll *pll)
+{
+	if (WARN_ON(pll < dev_priv->shared_dplls||
+		    pll > &dev_priv->shared_dplls[dev_priv->num_shared_dpll]))
+		return -1;
+
+	return (enum intel_dpll_id) (pll - dev_priv->shared_dplls);
+}
+
+void
+intel_shared_dpll_config_get(struct intel_shared_dpll_config *config,
+			     struct intel_shared_dpll *pll,
+			     struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum intel_dpll_id id = intel_get_shared_dpll_id(dev_priv, pll);
+
+	config[id].crtc_mask |= 1 << crtc->pipe;
+}
+
+void
+intel_shared_dpll_config_put(struct intel_shared_dpll_config *config,
+			     struct intel_shared_dpll *pll,
+			     struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum intel_dpll_id id = intel_get_shared_dpll_id(dev_priv, pll);
 
-	return &dev_priv->shared_dplls[crtc->config->shared_dpll];
+	config[id].crtc_mask &= ~(1 << crtc->pipe);
 }
 
 /* For ILK+ */
@@ -55,7 +84,7 @@ void intel_prepare_shared_dpll(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
+	struct intel_shared_dpll *pll = crtc->config->shared_dpll;
 
 	if (WARN_ON(pll == NULL))
 		return;
@@ -82,7 +111,7 @@ void intel_enable_shared_dpll(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
+	struct intel_shared_dpll *pll = crtc->config->shared_dpll;
 
 	if (WARN_ON(pll == NULL))
 		return;
@@ -112,7 +141,7 @@ void intel_disable_shared_dpll(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
+	struct intel_shared_dpll *pll = crtc->config->shared_dpll;
 
 	/* PCH only available on ILK+ */
 	if (INTEL_INFO(dev)->gen < 5)
@@ -265,11 +294,11 @@ intel_get_shared_dpll(struct intel_crtc *crtc,
 		shared_dpll[i].hw_state =
 			crtc_state->dpll_hw_state;
 
-	crtc_state->shared_dpll = i;
+	crtc_state->shared_dpll = pll;
 	DRM_DEBUG_DRIVER("using %s for pipe %c\n", pll->name,
 			 pipe_name(crtc->pipe));
 
-	shared_dpll[i].crtc_mask |= 1 << crtc->pipe;
+	intel_shared_dpll_config_get(shared_dpll, pll, crtc);
 
 	return pll;
 }
@@ -360,7 +389,7 @@ static void ibx_pch_dpll_disable(struct drm_i915_private *dev_priv,
 
 	/* Make sure no transcoder isn't still depending on us. */
 	for_each_intel_crtc(dev, crtc) {
-		if (intel_crtc_to_shared_dpll(crtc) == pll)
+		if (crtc->config->shared_dpll == pll)
 			assert_pch_transcoder_disabled(dev_priv, crtc->pipe);
 	}
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 96e84d3..0a929c1 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -441,8 +441,8 @@ struct intel_crtc_state {
 	 * haswell. */
 	struct dpll dpll;
 
-	/* Selected dpll when shared or DPLL_ID_PRIVATE. */
-	enum intel_dpll_id shared_dpll;
+	/* Selected dpll when shared or NULL. */
+	struct intel_shared_dpll *shared_dpll;
 
 	/*
 	 * - PORT_CLK_SEL for DDI ports on HSW/BDW.
@@ -1147,7 +1147,20 @@ void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
 				    enum pipe pipe);
 
 /* shared dpll functions */
-struct intel_shared_dpll *intel_crtc_to_shared_dpll(struct intel_crtc *crtc);
+struct intel_shared_dpll *
+intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
+			    enum intel_dpll_id id);
+enum intel_dpll_id
+intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
+			 struct intel_shared_dpll *pll);
+void
+intel_shared_dpll_config_get(struct intel_shared_dpll_config *config,
+			     struct intel_shared_dpll *pll,
+			     struct intel_crtc *crtc);
+void
+intel_shared_dpll_config_put(struct intel_shared_dpll_config *config,
+			     struct intel_shared_dpll *pll,
+			     struct intel_crtc *crtc);
 void assert_shared_dpll(struct drm_i915_private *dev_priv,
 			struct intel_shared_dpll *pll,
 			bool state);
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 30a8403..a042a6f28 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -151,7 +151,7 @@ static void intel_pre_enable_lvds(struct intel_encoder *encoder)
 	if (HAS_PCH_SPLIT(dev)) {
 		assert_fdi_rx_pll_disabled(dev_priv, pipe);
 		assert_shared_dpll_disabled(dev_priv,
-					    intel_crtc_to_shared_dpll(crtc));
+					    crtc->config->shared_dpll);
 	} else {
 		assert_pll_disabled(dev_priv, pipe);
 	}
-- 
2.4.3

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