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drm/i915: Reject YCbCr output with degamma+gamma on pre-icl

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Since the pipe CSC sits between the degamma and gamma LUTs there
is no way to make us it for RGB->YCbCr conversion when both LUTs
are also active. Simply reject such combos.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026113906.10551-10-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
This commit is contained in:
Ville Syrjälä
2022-10-26 14:39:04 +03:00
parent 6d5e733f3a
commit 4c0119dd0a
1 changed files with 16 additions and 2 deletions
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18
drivers/gpu/drm/i915/display/intel_color.c
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@@ -1556,7 +1556,14 @@ static int ivb_color_check(struct intel_crtc_state *crtc_state)
if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB &&
crtc_state->hw.ctm) {
drm_dbg_kms(&i915->drm,
"YCBCR and CTM together are not possible\n");
"YCbCr and CTM together are not possible\n");
return -EINVAL;
}
if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB &&
crtc_state->hw.degamma_lut && crtc_state->hw.gamma_lut) {
drm_dbg_kms(&i915->drm,
"YCbCr and degamma+gamma together are not possible\n");
return -EINVAL;
}
@@ -1622,7 +1629,14 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB &&
crtc_state->hw.ctm) {
drm_dbg_kms(&i915->drm,
"YCBCR and CTM together are not possible\n");
"YCbCr and CTM together are not possible\n");
return -EINVAL;
}
if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB &&
crtc_state->hw.degamma_lut && crtc_state->hw.gamma_lut) {
drm_dbg_kms(&i915->drm,
"YCbCr and degamma+gamma together are not possible\n");
return -EINVAL;
}