[Intel-gfx] [PATCH 2/5] drm/edid: Introduce drm_default_rgb_quant_range()

[Daniel Vetter]

On Wed, Jan 11, 2017 at 02:57:22PM +0200, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Make the code selecting the RGB quantization range a little less magicy
> by wrapping it up in a small helper.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Needs cc: for driver maintainers, Eric for vc4 here.
-Daniel

> ---
>  drivers/gpu/drm/drm_edid.c        | 18 ++++++++++++++++++
>  drivers/gpu/drm/i915/intel_dp.c   |  4 +++-
>  drivers/gpu/drm/i915/intel_hdmi.c |  3 ++-
>  drivers/gpu/drm/vc4/vc4_hdmi.c    |  4 +++-
>  include/drm/drm_edid.h            |  2 ++
>  5 files changed, 28 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 4ff04aa84dd0..304c583b8000 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3768,6 +3768,24 @@ bool drm_rgb_quant_range_selectable(struct edid *edid)
>  }
>  EXPORT_SYMBOL(drm_rgb_quant_range_selectable);
>  
> +/**
> + * drm_default_rgb_quant_range - default RGB quantization range
> + * @mode: display mode
> + *
> + * Determine the default RGB quantization range for the mode,
> + * as specified in CEA-861.
> + *
> + * Return: The default RGB quantization range for the mode
> + */
> +enum hdmi_quantization_range
> +drm_default_rgb_quant_range(const struct drm_display_mode *mode)
> +{
> +	return drm_match_cea_mode(mode) > 1 ?
> +		HDMI_QUANTIZATION_RANGE_LIMITED :
> +		HDMI_QUANTIZATION_RANGE_FULL;
> +}
> +EXPORT_SYMBOL(drm_default_rgb_quant_range);
> +
>  static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
>  					   const u8 *hdmi)
>  {
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 343e1d9fa761..d4befbbe834a 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1713,7 +1713,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
>  		 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
>  		 */
>  		pipe_config->limited_color_range =
> -			bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1;
> +			bpp != 18 &&
> +			drm_default_rgb_quant_range(adjusted_mode) ==
> +			HDMI_QUANTIZATION_RANGE_LIMITED;
>  	} else {
>  		pipe_config->limited_color_range =
>  			intel_dp->limited_color_range;
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 0bcfead14571..19bd13f53729 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1330,7 +1330,8 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
>  		/* See CEA-861-E - 5.1 Default Encoding Parameters */
>  		pipe_config->limited_color_range =
>  			pipe_config->has_hdmi_sink &&
> -			drm_match_cea_mode(adjusted_mode) > 1;
> +			drm_default_rgb_quant_range(adjusted_mode) ==
> +			HDMI_QUANTIZATION_RANGE_LIMITED;
>  	} else {
>  		pipe_config->limited_color_range =
>  			intel_hdmi->limited_color_range;
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index c4cb2e26de32..d79466a42690 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -463,7 +463,9 @@ static void vc4_hdmi_encoder_mode_set(struct drm_encoder *encoder,
>  	csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
>  				VC4_HD_CSC_CTL_ORDER);
>  
> -	if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
> +	if (vc4_encoder->hdmi_monitor &&
> +	    drm_default_rgb_quant_range(adjusted_mode) ==
> +	    HDMI_QUANTIZATION_RANGE_LIMITED) {
>  		/* CEA VICs other than #1 requre limited range RGB
>  		 * output unless overridden by an AVI infoframe.
>  		 * Apply a colorspace conversion to squash 0-255 down
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 838eaf2b42e9..25cdf5f7a0d8 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -441,6 +441,8 @@ enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
>  bool drm_detect_hdmi_monitor(struct edid *edid);
>  bool drm_detect_monitor_audio(struct edid *edid);
>  bool drm_rgb_quant_range_selectable(struct edid *edid);
> +enum hdmi_quantization_range
> +drm_default_rgb_quant_range(const struct drm_display_mode *mode);
>  int drm_add_modes_noedid(struct drm_connector *connector,
>  			 int hdisplay, int vdisplay);
>  void drm_set_preferred_mode(struct drm_connector *connector,
> -- 
> 2.10.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch