On Tue, May 30, 2017 at 05:43:43PM +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.
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Jose Abreu <joabreu@xxxxxxxxxxxx>
> Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_edid.c | 15 +++++++++++++++
> include/drm/drm_connector.h | 3 +++
> include/drm/drm_edid.h | 5 +++++
> 3 files changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index ce86528..50fa96e 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4142,6 +4142,19 @@ 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)
> +{
> + struct drm_hdmi_info *info = &connector->display_info.hdmi;
> +
> + if (db[7] & DRM_EDID_YCBCR420_DC_48)
> + info->ycbcr420_dc_modes |= DRM_EDID_YCBCR420_DC_48;
> + if (db[7] & DRM_EDID_YCBCR420_DC_36)
> + info->ycbcr420_dc_modes |= DRM_EDID_YCBCR420_DC_36;
> + if (db[7] & DRM_EDID_YCBCR420_DC_30)
> + info->ycbcr420_dc_modes |= DRM_EDID_YCBCR420_DC_30;
> +}
> +
> static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
> const u8 *hf_vsdb)
> {
> @@ -4182,6 +4195,8 @@ 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 07b10ab..49cc38c 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -148,6 +148,9 @@ struct drm_hdmi_info {
>
> /** @ycbcr420_vcb_map: bitmap of SVD index, to extraxt vcb modes */
> u64 ycbcr420_vcb_map;
> +
> + /** @ycbcr420_dc_modes: bitmap of deep color support index */
> + u8 ycbcr420_dc_modes;
We seem to be wasting quite a few bits by reusing the EDID bit
definition directly. Maybe we should consider packing these better?
But I suppose we can look into that later.
> };
>
> /**
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index c07eb81..a4d174e7 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -213,6 +213,11 @@ 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)
> +
> /* ELD Header Block */
> #define DRM_ELD_HEADER_BLOCK_SIZE 4
>
> --
> 2.7.4
--
Ville Syrjälä
Intel OTC
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