[PATCH 09/14] drm/i915/dp: Check if mode can be supported with dsc compressed bpp

[Ankit Nautiyal]

Use compressed bpp to calculate mode_rate during dp_mode_valid.
Check if this can be supported with max lane count and link rate
combination.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 13cd0ed8d478..47e8b1fba20d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1104,8 +1104,6 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 	max_lanes = intel_dp_max_lane_count(intel_dp);
 
 	max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
-	mode_rate = intel_dp_link_required(target_clock,
-					   intel_dp_mode_min_output_bpp(connector, mode));
 	if (DISPLAY_VER(dev_priv) >= 10 &&
 	    drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
 		int pipe_bpp;
@@ -1160,7 +1158,12 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 	if (DISPLAY_VER(dev_priv) < 13 && bigjoiner && !dsc)
 		return MODE_CLOCK_HIGH;
 
-	if (mode_rate > max_rate && !dsc)
+	if (dsc)
+		mode_rate = intel_dp_link_required(target_clock, dsc_max_output_bpp);
+	else
+		mode_rate = intel_dp_link_required(target_clock,
+						   intel_dp_mode_min_output_bpp(connector, mode));
+	if (mode_rate > max_rate)
 		return MODE_CLOCK_HIGH;
 
 	status = intel_dp_mode_valid_downstream(connector, mode, target_clock);
-- 
2.25.1