On Fri, Mar 31, 2023 at 03:46:04PM +0530, Ankit Nautiyal wrote:
> Handle the case with DP to HDMI PCON, where sink_format is set to YCbCr444.
> In that case PCON is required to be configured to convert from given
> output_format to YCbCR444.
> 
> Signed-off-by: Ankit Nautiyal <[email protected]>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 837532952936..c3f3003c52ca 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2862,6 +2862,22 @@ void intel_dp_configure_protocol_converter(struct 
> intel_dp *intel_dp,
>                       MISSING_CASE(crtc_state->output_format);
>                       break;
>               }
> +     } else if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
> +             switch (crtc_state->output_format) {
> +             case INTEL_OUTPUT_FORMAT_YCBCR420:
> +                     drm_WARN(&i915->drm,
> +                              crtc_state->output_format == 
> INTEL_OUTPUT_FORMAT_YCBCR420,
> +                              "Cannot convert YCbCr420->YCbCr444\n");

Since this should never happen I think we can drop this
and just let the MISSING_CASE() catch it.

with that
Reviewed-by: Ville Syrjälä <[email protected]>

> +                     break;
> +             case INTEL_OUTPUT_FORMAT_YCBCR444:
> +                     break;
> +             case INTEL_OUTPUT_FORMAT_RGB:
> +                     rgb_to_ycbcr = true;
> +                     break;
> +             default:
> +                     MISSING_CASE(crtc_state->output_format);
> +                     break;
> +             }
>       }
>  
>       tmp = ycbcr444_to_420 ? DP_CONVERSION_TO_YCBCR420_ENABLE : 0;
> -- 
> 2.25.1

-- 
Ville Syrjälä
Intel

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