Add helper function to check if Downstream HDMI 2.1 sink supports
DSC1.2.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 32292c0be2bd..fdf82373a22d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -118,6 +118,15 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp)
static void intel_dp_unset_edid(struct intel_dp *intel_dp);
static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc);
+static bool
+is_dfp_hdmi_sink_dsc_1_2(struct intel_dp *intel_dp)
+{
+ struct intel_connector *intel_connector = intel_dp->attached_connector;
+ struct drm_connector *connector = &intel_connector->base;
+
+ return connector->display_info.hdmi.dsc_cap.v_1p2;
+}
+
/* Is link rate UHBR and thus 128b/132b? */
bool intel_dp_is_uhbr(const struct intel_crtc_state *crtc_state)
{
@@ -2393,7 +2402,7 @@ static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp)
rate_per_lane = connector->display_info.hdmi.max_frl_rate_per_lane;
max_frl_rate = max_lanes * rate_per_lane;
- if (connector->display_info.hdmi.dsc_cap.v_1p2) {
+ if (is_dfp_hdmi_sink_dsc_1_2(intel_dp)) {
max_dsc_lanes = connector->display_info.hdmi.dsc_cap.max_lanes;
dsc_rate_per_lane = connector->display_info.hdmi.dsc_cap.max_frl_rate_per_lane;
if (max_dsc_lanes && dsc_rate_per_lane)
@@ -2605,7 +2614,7 @@ intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,
if (!intel_connector)
return;
connector = &intel_connector->base;
- hdmi_is_dsc_1_2 = connector->display_info.hdmi.dsc_cap.v_1p2;
+ hdmi_is_dsc_1_2 = is_dfp_hdmi_sink_dsc_1_2(intel_dp);
if (!drm_dp_pcon_enc_is_dsc_1_2(intel_dp->pcon_dsc_dpcd) ||
!hdmi_is_dsc_1_2)
--
2.25.1
