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drm/i915: Set DP min_bpp to 8*3 for non-RGB output formats

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6bpc is only legal for RGB and RAW pixel encodings. For the rest
the minimum is 8bpc. Set our lower limit accordingly.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190326142556.21176-6-ville.syrjala@linux.intel.com
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
This commit is contained in:
Ville Syrjälä
2019-03-26 16:25:56 +02:00
parent 632c7ad6f4
commit 4e2056e05e
3 changed files with 11 additions and 2 deletions
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10
drivers/gpu/drm/i915/intel_dp.c
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@@ -1978,6 +1978,14 @@ static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
return 0;
}
int intel_dp_min_bpp(const struct intel_crtc_state *crtc_state)
{
if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB)
return 6 * 3;
else
return 8 * 3;
}
static int
intel_dp_compute_link_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
@@ -2001,7 +2009,7 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
limits.min_lane_count = 1;
limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
limits.min_bpp = 6 * 3;
limits.min_bpp = intel_dp_min_bpp(pipe_config);
limits.max_bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
if (intel_dp_is_edp(intel_dp)) {