Avoid reading the PCON capabilities redundantly on non-branch devices.
v2:
- Make commit description more accurate. (Imre)
- Clear intel_dp->pcon_dsc_dpcd irrespective of presense of PCON. (Imre)
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.bo...@intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
b/drivers/gpu/drm/i915/display/intel_dp.c
index 277b40b13948..f48912f308df 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3726,6 +3726,9 @@ static void intel_dp_get_pcon_dsc_cap(struct intel_dp
*intel_dp)
memset(intel_dp->pcon_dsc_dpcd, 0, sizeof(intel_dp->pcon_dsc_dpcd));
+ if (!drm_dp_is_branch(intel_dp->dpcd))
+ return;
+
if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER,
intel_dp->pcon_dsc_dpcd,
sizeof(intel_dp->pcon_dsc_dpcd)) < 0)
--
2.25.1
