Re: [Intel-gfx] [PATCH 06/13] drm/i915/dp: Add helper to get sink_format

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Fri, Mar 31, 2023 at 03:46:06PM +0530, Ankit Nautiyal wrote:
> Common function to get the sink format for a given mode for DP.
> 
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 30 ++++++++++++-------------
>  1 file changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index ce9384a0d153..352b5fbd805a 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -936,17 +936,25 @@ static int intel_dp_output_bpp(enum intel_output_format output_format, int bpp)
>  	return bpp;
>  }
>  
> +static enum intel_output_format
> +intel_dp_sink_format(struct intel_connector *connector,
> +		     const struct drm_display_mode *mode)
> +{
> +	const struct drm_display_info *info = &connector->base.display_info;
> +
> +	if (drm_mode_is_420_only(info, mode))
> +		return INTEL_OUTPUT_FORMAT_YCBCR420;
> +
> +	return INTEL_OUTPUT_FORMAT_RGB;
> +}
> +
>  static int
>  intel_dp_mode_min_output_bpp(struct intel_connector *connector,
>  			     const struct drm_display_mode *mode)
>  {
> -	const struct drm_display_info *info = &connector->base.display_info;
>  	enum intel_output_format output_format, sink_format;
>  
> -	if (drm_mode_is_420_only(info, mode))
> -		sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
> -	else
> -		sink_format = INTEL_OUTPUT_FORMAT_RGB;
> +	sink_format = intel_dp_sink_format(connector, mode);
>  
>  	output_format = intel_dp_output_format(connector, sink_format);
>  
> @@ -1018,7 +1026,6 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector,
>  	struct intel_dp *intel_dp = intel_attached_dp(connector);
>  	const struct drm_display_info *info = &connector->base.display_info;
>  	enum drm_mode_status status;
> -	bool ycbcr_420_only;
>  	enum intel_output_format sink_format;
>  
>  	/* If PCON supports FRL MODE, check FRL bandwidth constraints */
> @@ -1044,12 +1051,7 @@ intel_dp_mode_valid_downstream(struct intel_connector *connector,
>  	    target_clock > intel_dp->dfp.max_dotclock)
>  		return MODE_CLOCK_HIGH;
>  
> -	ycbcr_420_only = drm_mode_is_420_only(info, mode);
> -
> -	if (ycbcr_420_only)
> -		sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
> -	else
> -		sink_format = INTEL_OUTPUT_FORMAT_RGB;
> +	sink_format = intel_dp_sink_format(connector, mode);
>  
>  	/* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */
>  	status = intel_dp_tmds_clock_valid(intel_dp, target_clock,
> @@ -2127,10 +2129,8 @@ intel_dp_compute_output_format(struct intel_encoder *encoder,
>  		drm_dbg_kms(&i915->drm,
>  			    "YCbCr 4:2:0 mode but YCbCr 4:2:0 output not possible. Falling back to RGB.\n");
>  		crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
> -	} else if (ycbcr_420_only) {
> -		crtc_state->sink_format = INTEL_OUTPUT_FORMAT_YCBCR420;
>  	} else {
> -		crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
> +		crtc_state->sink_format = intel_dp_sink_format(connector, adjusted_mode);
>  	}
>  
>  	crtc_state->output_format = intel_dp_output_format(connector, crtc_state->sink_format);
> -- 
> 2.25.1

-- 
Ville Syrjälä
Intel