From: Ville Syrjälä Date: Wed, 26 Oct 2022 11:39:04 +0000 (+0300) Subject: drm/i915: Reject YCbCr output with degamma+gamma on pre-icl X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4c0119dd0a7728456a2394c1bc0aa612e1f2c3cb;p=linux.git drm/i915: Reject YCbCr output with degamma+gamma on pre-icl 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 Link: https://patchwork.freedesktop.org/patch/msgid/20221026113906.10551-10-ville.syrjala@linux.intel.com Reviewed-by: Ankit Nautiyal --- diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 435394cad359e..926784f266f23 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -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; }