[PATCH v4 13/19] drm/i915/psr: Detect panel replay selective update support

[Jouni Högander]

Add new boolean to store panel replay selective update support of sink into
intel_psr struct.  Detect panel replay selective update support and store
it into this new boolean.

v3: Clear sink_panel_replay_su_support in intel_dp_detect
v2: Merge adding new boolean into this patch

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_types.h |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c            |  1 +
 drivers/gpu/drm/i915/display/intel_psr.c           | 10 ++++++++--
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 63097b10bc4d..fac568c312be 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1758,6 +1758,7 @@ struct intel_psr {
 	u16 su_y_granularity;
 	bool source_panel_replay_support;
 	bool sink_panel_replay_support;
+	bool sink_panel_replay_su_support;
 	bool panel_replay_enabled;
 	u32 dc3co_exitline;
 	u32 dc3co_exit_delay;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f1b917041192..5d896c338b61 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5730,6 +5730,7 @@ intel_dp_detect(struct drm_connector *connector,
 		memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
 		memset(intel_connector->dp.dsc_dpcd, 0, sizeof(intel_connector->dp.dsc_dpcd));
 		intel_dp->psr.sink_panel_replay_support = false;
+		intel_dp->psr.sink_panel_replay_su_support = false;
 
 		intel_dp_mst_disconnect(intel_dp);
 
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index f4c014eb28eb..fdc6d699d9c2 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -520,9 +520,15 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp)
 		return;
 	}
 
-	drm_dbg_kms(&i915->drm,
-		    "Panel replay is supported by panel\n");
 	intel_dp->psr.sink_panel_replay_support = true;
+
+	if (pr_dpcd & DP_PANEL_REPLAY_SU_SUPPORT)
+		intel_dp->psr.sink_panel_replay_su_support = true;
+
+	drm_dbg_kms(&i915->drm,
+		    "Panel replay %sis supported by panel\n",
+		    intel_dp->psr.sink_panel_replay_su_support ?
+		    "selective_update " : "");
 }
 
 static void _psr_init_dpcd(struct intel_dp *intel_dp)
-- 
2.34.1