As per the display enable sequence, we need to follow the enable sequence
for slaves first with DP_TP_CTL set to Idle and configure the transcoder
port sync register to select the corersponding master, then follow the
enable sequence for master leaving DP_TP_CTL to idle.
At this point the transcoder port sync mode is configured and enabled
and the Vblanks of both ports are synchronized so then set DP_TP_CTL
for the slave and master to Normal and do post crtc enable updates.
v11:
* Rebase (Manasi)
v10:
* in trans sync mode, dont stop link train for tgl (Manasi)
v9:
Remove update_scanline_offset to rebase on Maarten's patch (Manasi)
v8:
* Rebase on Maarten's patches (Manasi)
v7:
* Use ffs(slaves) to get slave crtc (Ville)
v6:
* Modeset implies active_changed, remove one condition (Maarten)
v5:
* Fix checkpatch warning (Manasi)
v4:
* Reuse skl_commit_modeset_enables() hook (Maarten)
* Obtain slave crtc and states from master (Maarten)
v3:
* Rebase on drm-tip (Manasi)
v2:
* Create a icl_update_crtcs hook (Maarten, Danvet)
* This sequence only for CRTCs in trans port sync mode (Maarten)
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 6 +-
drivers/gpu/drm/i915/display/intel_display.c | 136 ++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_display.h | 2 +
3 files changed, 139 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4c81449ec144..46a7b2ca2782 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3500,7 +3500,8 @@ static void tgl_ddi_pre_enable_dp(struct intel_encoder *encoder,
intel_dp_start_link_train(intel_dp);
/* 7.k */
- intel_dp_stop_link_train(intel_dp);
+ if (!is_trans_port_sync_mode(crtc_state))
+ intel_dp_stop_link_train(intel_dp);
/*
* TODO: enable clock gating
@@ -3574,7 +3575,8 @@ static void hsw_ddi_pre_enable_dp(struct intel_encoder *encoder,
true);
intel_dp_sink_set_fec_ready(intel_dp, crtc_state);
intel_dp_start_link_train(intel_dp);
- if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
+ if ((port != PORT_A || INTEL_GEN(dev_priv) >= 9) &&
+ !is_trans_port_sync_mode(crtc_state))
intel_dp_stop_link_train(intel_dp);
intel_ddi_enable_fec(encoder, crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index f6c57255bf28..bfbf916dc250 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14061,6 +14061,18 @@ static void intel_update_crtc(struct intel_crtc *crtc,
intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
}
+static struct intel_crtc *intel_get_slave_crtc(const struct intel_crtc_state *new_crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(new_crtc_state->base.crtc->dev);
+ enum transcoder slave_transcoder;
+
+ WARN_ON(!is_power_of_2(new_crtc_state->sync_mode_slaves_mask));
+
+ slave_transcoder = ffs(new_crtc_state->sync_mode_slaves_mask) - 1;
+ return intel_get_crtc_for_pipe(dev_priv,
+ (enum pipe)slave_transcoder);
+}
+
static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
struct intel_crtc_state *old_crtc_state,
struct intel_crtc_state *new_crtc_state,
@@ -14139,6 +14151,113 @@ static void intel_commit_modeset_enables(struct intel_atomic_state *state)
}
}
+static void intel_crtc_enable_trans_port_sync(struct intel_crtc *crtc,
+ struct intel_atomic_state *state,
+ struct intel_crtc_state *new_crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+
+ intel_crtc_update_active_timings(new_crtc_state);
+ dev_priv->display.crtc_enable(new_crtc_state, state);
+ intel_crtc_enable_pipe_crc(crtc);
+}
+
+static void intel_set_dp_tp_ctl_normal(struct intel_crtc *crtc,
+ struct intel_atomic_state *state)
+{
+ struct drm_connector_state *conn_state;
+ struct drm_connector *conn;
+ struct intel_dp *intel_dp;
+ int i;
+
+ for_each_new_connector_in_state(&state->base, conn, conn_state, i) {
+ if (conn_state->crtc == &crtc->base)
+ break;
+ }
+ intel_dp = enc_to_intel_dp(&intel_attached_encoder(conn)->base);
+ intel_dp_stop_link_train(intel_dp);
+}
+
+static void intel_post_crtc_enable_updates(struct intel_crtc *crtc,
+ struct intel_atomic_state *state)
+{
+ struct intel_crtc_state *new_crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+ struct intel_crtc_state *old_crtc_state =
+ intel_atomic_get_old_crtc_state(state, crtc);
+ struct intel_plane_state *new_plane_state =
+ intel_atomic_get_new_plane_state(state,
+ to_intel_plane(crtc->base.primary));
+ bool modeset = needs_modeset(new_crtc_state);
+
+ if (new_crtc_state->update_pipe && !new_crtc_state->enable_fbc)
+ intel_fbc_disable(crtc);
+ else if (new_plane_state)
+ intel_fbc_enable(crtc, new_crtc_state, new_plane_state);
+
+ /* Perform vblank evasion around commit operation */
+ intel_pipe_update_start(new_crtc_state);
+ commit_pipe_config(state, old_crtc_state, new_crtc_state);
+ skl_update_planes_on_crtc(state, crtc);
+ intel_pipe_update_end(new_crtc_state);
+
+ /*
+ * We usually enable FIFO underrun interrupts as part of the
+ * CRTC enable sequence during modesets. But when we inherit a
+ * valid pipe configuration from the BIOS we need to take care
+ * of enabling them on the CRTC's first fastset.
+ */
+ if (new_crtc_state->update_pipe && !modeset &&
+ old_crtc_state->base.mode.private_flags & I915_MODE_FLAG_INHERITED)
+ intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
+}
+
+static void intel_update_trans_port_sync_crtcs(struct intel_crtc *crtc,
+ struct intel_atomic_state *state,
+ struct intel_crtc_state *old_crtc_state,
+ struct intel_crtc_state *new_crtc_state)
+{
+ struct intel_crtc *slave_crtc = intel_get_slave_crtc(new_crtc_state);
+ struct intel_crtc_state *new_slave_crtc_state =
+ intel_atomic_get_new_crtc_state(state, slave_crtc);
+ struct intel_crtc_state *old_slave_crtc_state =
+ intel_atomic_get_old_crtc_state(state, slave_crtc);
+
+ WARN_ON(!slave_crtc || !new_slave_crtc_state ||
+ !old_slave_crtc_state);
+
+ DRM_DEBUG_KMS("Updating Transcoder Port Sync Master CRTC = %d %s and Slave CRTC %d %s\n",
+ crtc->base.base.id, crtc->base.name, slave_crtc->base.base.id,
+ slave_crtc->base.name);
+
+ /* Enable seq for slave with with DP_TP_CTL left Idle until the
+ * master is ready
+ */
+ intel_crtc_enable_trans_port_sync(slave_crtc,
+ state,
+ new_slave_crtc_state);
+
+ /* Enable seq for master with with DP_TP_CTL left Idle */
+ intel_crtc_enable_trans_port_sync(crtc,
+ state,
+ new_crtc_state);
+
+ /* Set Slave's DP_TP_CTL to Normal */
+ intel_set_dp_tp_ctl_normal(slave_crtc,
+ state);
+
+ /* Set Master's DP_TP_CTL To Normal */
+ usleep_range(200, 400);
+ intel_set_dp_tp_ctl_normal(crtc,
+ state);
+
+ /* Now do the post crtc enable for all master and slaves */
+ intel_post_crtc_enable_updates(slave_crtc,
+ state);
+ intel_post_crtc_enable_updates(crtc,
+ state);
+}
+
static void skl_commit_modeset_enables(struct intel_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->base.dev);
@@ -14172,6 +14291,7 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
enum pipe pipe = crtc->pipe;
bool vbl_wait = false;
+ bool modeset = needs_modeset(new_crtc_state);
if (updated & BIT(crtc->pipe) || !new_crtc_state->base.active)
continue;
@@ -14192,12 +14312,22 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
*/
if (!skl_ddb_entry_equal(&new_crtc_state->wm.skl.ddb,
&old_crtc_state->wm.skl.ddb) &&
- !new_crtc_state->base.active_changed &&
+ !modeset &&
state->wm_results.dirty_pipes != updated)
vbl_wait = true;
- intel_update_crtc(crtc, state, old_crtc_state,
- new_crtc_state);
+ if (modeset && is_trans_port_sync_mode(new_crtc_state)) {
+ if (is_trans_port_sync_master(new_crtc_state))
+ intel_update_trans_port_sync_crtcs(crtc,
+ state,
+ old_crtc_state,
+ new_crtc_state);
+ else
+ continue;
+ } else {
+ intel_update_crtc(crtc, state, old_crtc_state,
+ new_crtc_state);
+ }
if (vbl_wait)
intel_wait_for_vblank(dev_priv, pipe);
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index db149cb56ec5..7dcb176d91b0 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -27,6 +27,7 @@
#include <drm/drm_util.h>
#include <drm/i915_drm.h>
+#include "intel_dp_link_training.h"
enum link_m_n_set;
struct dpll;
@@ -54,6 +55,7 @@ struct intel_plane;
struct intel_plane_state;
struct intel_remapped_info;
struct intel_rotation_info;
+struct intel_crtc_state;
enum i915_gpio {
GPIOA,
--
2.19.1
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