[Intel-gfx] [PATCH] drm/i915: Don't overestimate 4:2:0 link symbol clock

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

With 4:2:0 output the LS clock can be half of what it is with 4:4:4.
Make that happen.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0bdb7ecc5a81..1dfacf090fb8 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1853,8 +1853,10 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 	int mode_rate, link_clock, link_avail;
 
 	for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
+		int output_bpp = intel_dp_output_bpp(pipe_config, bpp);
+
 		mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
-						   bpp);
+						   output_bpp);
 
 		for (clock = limits->min_clock; clock <= limits->max_clock; clock++) {
 			for (lane_count = limits->min_lane_count;
-- 
2.21.0