[Intel-gfx] [PATCH 5/8] drm/i915/psr: Do not enable PSR2 if sink requires selective update X granularity

[José Roberto de Souza]

According to eDP spec, sink could required a granularity in the
start of x coordinate or in the width of the selective update region.
As it is not supported by hardware, lets not enable PSR2 in sinks
that requires it.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 0dd4211cb293..84b512426514 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -243,6 +243,8 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 		bool y_req = intel_dp->psr_dpcd[1] &
 			     DP_PSR2_SU_Y_COORDINATE_REQUIRED;
 		bool alpm = intel_dp_get_alpm_status(intel_dp);
+		bool granularity_req = (intel_dp->psr_dpcd[1] &
+					DP_PSR2_SU_GRANULARITY_REQUIRED);
 
 		/*
 		 * All panels that supports PSR version 03h (PSR2 +
@@ -255,7 +257,8 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 		 * Y-coordinate requirement panels we would need to enable
 		 * GTC first.
 		 */
-		dev_priv->psr.sink_psr2_support = y_req && alpm;
+		dev_priv->psr.sink_psr2_support = y_req && alpm &&
+						  !granularity_req;
 		DRM_DEBUG_KMS("PSR2 %ssupported\n",
 			      dev_priv->psr.sink_psr2_support ? "" : "not ");
 
-- 
2.19.0