On Tue, Feb 05, 2019 at 09:33:36PM +0530, Uma Shankar wrote:
> This adds colorspace information to HDMI AVI infoframe.
> A helper function is added to program the same.
>
> v2: Moved this to drm core instead of i915 driver.
>
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_connector.c | 2 +-
> drivers/gpu/drm/drm_edid.c | 28 ++++++++++++++++++++++++++++
> include/drm/drm_edid.h | 6 ++++++
> 3 files changed, 35 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 86b368bf..086085d 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -862,7 +862,7 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
> { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
> /* Colorimetry based on IEC 61966-2-5 */
> { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
> - { DRM_MODE_COLORIMETRY_DCI_P3, "DCI-P3" },
> + { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
> /* DP MSA Colorimetry */
> { DRM_MODE_DP_COLORIMETRY_YCBCR_ITU_601, "YCBCR_ITU_601" },
> { DRM_MODE_DP_COLORIMETRY_YCBCR_ITU_709, "YCBCR_ITU_709" },
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 990b190..1fc0978 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4925,6 +4925,34 @@ static bool is_hdmi2_sink(struct drm_connector *connector)
> EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode);
>
> /**
> + * drm_hdmi_avi_infoframe_colorspace() - fill the HDMI AVI infoframe
> + * colorspace information
> + * @frame: HDMI AVI infoframe
> + * @conn_state: connector state
> + */
> +void
> +drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
> + const struct drm_connector_state *conn_state)
> +{
> + if (conn_state->colorspace == DRM_MODE_COLORIMETRY_DEFAULT) {
> + /* Set No Data as default for HDMI */
> + frame->colorimetry = DRM_MODE_COLORIMETRY_NO_DATA;
> + } else if (conn_state->colorspace < DRM_MODE_COLORIMETRY_XVYCC_601) {
> + frame->colorimetry = conn_state->colorspace;
> + } else {
> + frame->colorimetry = HDMI_COLORIMETRY_EXTENDED;
> + /*
> + * Starting from extended list where COLORIMETRY_XV_YCC_601
> + * is the first extended mode and its value is 0 as per HDMI
> + * specification.
> + * ToDO: Extend to support ACE formats defined in CTA 861.G
> + */
> + frame->extended_colorimetry = conn_state->colorspace -
> + DRM_MODE_COLORIMETRY_XVYCC_601;
IMO if you don't want to make the numbers based on the spec, then this
sould become a proper lookup table.
> + }
> +}
> +
> +/**
> * drm_hdmi_avi_infoframe_quant_range() - fill the HDMI AVI infoframe
> * quantization range information
> * @frame: HDMI AVI infoframe
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 8dc1a08..9d3b5b9 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -331,6 +331,7 @@ struct cea_sad {
>
> struct drm_encoder;
> struct drm_connector;
> +struct drm_connector_state;
> struct drm_display_mode;
>
> int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
> @@ -358,6 +359,11 @@ int drm_av_sync_delay(struct drm_connector *connector,
> drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
> struct drm_connector *connector,
> const struct drm_display_mode *mode);
> +
> +void
> +drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
> + const struct drm_connector_state *conn_state);
> +
> void
> drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
> struct drm_connector *connector,
> --
> 1.9.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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