[Intel-gfx] [PATCH 03/12] drm/i915/psr: Nuke aux frame sync

[José Roberto de Souza]

Without GTC enabled hardware is sending dummy aux frame sync value
that is not useful to sink do selective update, that is why it also
require that sink supports and requires the y-coordinate.

So removing everything related to aux frame sync, if GTC is enabled
we can bring this back.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h  |  1 -
 drivers/gpu/drm/i915/intel_psr.c | 23 +----------------------
 2 files changed, 1 insertion(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c9c3b2ba6a86..7fe00509e51a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -602,7 +602,6 @@ struct i915_psr {
 	struct delayed_work work;
 	unsigned busy_frontbuffer_bits;
 	bool psr2_support;
-	bool aux_frame_sync;
 	bool link_standby;
 	bool y_cord_support;
 	bool colorimetry_support;
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index b8e083e10029..d46320a451d9 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -137,16 +137,9 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 
 	if (INTEL_GEN(dev_priv) >= 9 &&
 	    (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
-		uint8_t frame_sync_cap;
 
 		dev_priv->psr.sink_support = true;
-		if (drm_dp_dpcd_readb(&intel_dp->aux,
-				      DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
-				      &frame_sync_cap) != 1)
-			frame_sync_cap = 0;
-		dev_priv->psr.aux_frame_sync = frame_sync_cap & DP_AUX_FRAME_SYNC_CAP;
-		/* PSR2 needs frame sync as well */
-		dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
+		dev_priv->psr.psr2_support = true;
 		DRM_DEBUG_KMS("PSR2 %s on sink",
 			      dev_priv->psr.psr2_support ? "supported" : "not supported");
 
@@ -269,11 +262,6 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
 	struct drm_i915_private *dev_priv = to_i915(dev);
 
 
-	/* Enable AUX frame sync at sink */
-	if (dev_priv->psr.aux_frame_sync)
-		drm_dp_dpcd_writeb(&intel_dp->aux,
-				DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF,
-				DP_AUX_FRAME_SYNC_ENABLE);
 	/* Enable ALPM at sink for psr2 */
 	if (dev_priv->psr.psr2_support && dev_priv->psr.alpm)
 		drm_dp_dpcd_writeb(&intel_dp->aux,
@@ -712,11 +700,6 @@ static void hsw_psr_disable(struct intel_dp *intel_dp,
 		i915_reg_t psr_status;
 		u32 psr_status_mask;
 
-		if (dev_priv->psr.aux_frame_sync)
-			drm_dp_dpcd_writeb(&intel_dp->aux,
-					DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF,
-					0);
-
 		if (dev_priv->psr.psr2_support) {
 			psr_status = EDP_PSR2_STATUS;
 			psr_status_mask = EDP_PSR2_STATUS_STATE_MASK;
@@ -860,10 +843,6 @@ static void intel_psr_exit(struct drm_i915_private *dev_priv)
 		return;
 
 	if (HAS_DDI(dev_priv)) {
-		if (dev_priv->psr.aux_frame_sync)
-			drm_dp_dpcd_writeb(&intel_dp->aux,
-					DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF,
-					0);
 		if (dev_priv->psr.psr2_support) {
 			val = I915_READ(EDP_PSR2_CTL);
 			WARN_ON(!(val & EDP_PSR2_ENABLE));
-- 
2.16.2