Re: [Intel-gfx] [PATCH 2/5] drm/i915: Force RGB output for DVI sink

[Jani Nikula <jani.nikula@linux.intel.com>]

On Mon, 07 Nov 2022, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> YCbCr output requires infoframes and whatnot, so don't allow
> it when dealing with a DVI sink (or a HDMI sink we wishc to
> treat as DVI).

*wish

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_hdmi.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index f2a4431a7fbf..d3692c9a1d80 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -2190,9 +2190,13 @@ static bool intel_hdmi_has_audio(struct intel_encoder *encoder,
>  }
>  
>  static enum intel_output_format
> -intel_hdmi_output_format(struct intel_connector *connector,
> +intel_hdmi_output_format(const struct intel_crtc_state *crtc_state,
> +			 struct intel_connector *connector,
>  			 bool ycbcr_420_output)
>  {
> +	if (!crtc_state->has_hdmi_sink)
> +		return INTEL_OUTPUT_FORMAT_RGB;
> +
>  	if (connector->base.ycbcr_420_allowed && ycbcr_420_output)
>  		return INTEL_OUTPUT_FORMAT_YCBCR420;
>  	else
> @@ -2211,7 +2215,8 @@ static int intel_hdmi_compute_output_format(struct intel_encoder *encoder,
>  	bool ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);
>  	int ret;
>  
> -	crtc_state->output_format = intel_hdmi_output_format(connector, ycbcr_420_only);
> +	crtc_state->output_format =
> +		intel_hdmi_output_format(crtc_state, connector, ycbcr_420_only);
>  
>  	if (ycbcr_420_only && !intel_hdmi_is_ycbcr420(crtc_state)) {
>  		drm_dbg_kms(&i915->drm,
> @@ -2226,7 +2231,7 @@ static int intel_hdmi_compute_output_format(struct intel_encoder *encoder,
>  		    !drm_mode_is_420_also(info, adjusted_mode))
>  			return ret;
>  
> -		crtc_state->output_format = intel_hdmi_output_format(connector, true);
> +		crtc_state->output_format = intel_hdmi_output_format(crtc_state, connector, true);
>  		ret = intel_hdmi_compute_clock(encoder, crtc_state, respect_downstream_limits);
>  	}

-- 
Jani Nikula, Intel Open Source Graphics Center