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drm/i915: Don't overestimate 4:2:0 link symbol clock

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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@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190710125851.3275-1-ville.syrjala@linux.intel.com
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Tested-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
This commit is contained in:
Ville Syrjälä 2019-07-10 15:58:51 +03:00
parent 86c9640b3a
commit ddb3d12afa
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/display/intel_dp.c
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@ -1854,8 +1854,10 @@ 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;