[PATCH 07/20] drm/edid: parse ycbcr 420 deep color information

[Ville Syrjälä]

On Mon, Jul 10, 2017 at 04:48:35PM +0530, Shashank Sharma wrote:
> CEA-861-F spec adds ycbcr420 deep color support information
> in hf-vsdb block. This patch extends the existing hf-vsdb parsing
> function by adding parsing of ycbcr420 deep color support from the
> EDID and adding it into display information stored.
> 
> V2: Rebase
> V3: Rebase
> V4: Moved definition of y420_dc_modes into this patch, where its used
>     (Ville)
> V5: Optimize function, if(conditions) not reqd (Ville)
> V6: Rebase
> 
> Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c  | 12 ++++++++++++
>  include/drm/drm_connector.h |  3 +++
>  include/drm/drm_edid.h      |  8 ++++++++
>  3 files changed, 23 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 44be128..944a28f 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4199,6 +4199,16 @@ drm_default_rgb_quant_range(const struct drm_display_mode *mode)
>  }
>  EXPORT_SYMBOL(drm_default_rgb_quant_range);
>  
> +static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
> +					     const u8 *db)
> +{
> +	u8 dc_mask;
> +	struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
> +
> +	dc_mask = db[7] & DRM_EDID_YCBCR420_DC_MASK;
> +	hdmi->y420_dc_modes |= dc_mask;
> +}
> +
>  static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
>  				 const u8 *hf_vsdb)
>  {
> @@ -4239,6 +4249,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
>  				scdc->scrambling.low_rates = true;
>  		}
>  	}
> +
> +	drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb);
>  }
>  
>  static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 225e092..4bc0882 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -154,6 +154,9 @@ struct drm_hdmi_info {
>  
>  	/** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
>  	u64 y420_cmdb_map;
> +
> +	/** @y420_dc_modes: bitmap of deep color support index */
> +	u8 y420_dc_modes;

Pls put it next to the other dc u8 stuff.

>  };
>  
>  /**
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index b55b2a7..aa58146 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -213,6 +213,14 @@ struct detailed_timing {
>  #define DRM_EDID_HDMI_DC_30               (1 << 4)
>  #define DRM_EDID_HDMI_DC_Y444             (1 << 3)
>  
> +/* YCBCR 420 deep color modes */
> +#define DRM_EDID_YCBCR420_DC_48		  (1 << 6)
> +#define DRM_EDID_YCBCR420_DC_36		  (1 << 5)
> +#define DRM_EDID_YCBCR420_DC_30		  (1 << 4)
> +#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
> +				    DRM_EDID_YCBCR420_DC_36 | \
> +				    DRM_EDID_YCBCR420_DC_30)
> +
>  /* ELD Header Block */
>  #define DRM_ELD_HEADER_BLOCK_SIZE	4
>  
> -- 
> 2.7.4
> 
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-- 
Ville Syrjälä
Intel OTC