While the two enums have similar values, they're not identical, and HDMI's enum is defined as per the HDMI standard.
Add a simple conversion function from DRM to HDMI. Unexpected inputs aren't handled in any clever way, DRM_COLOR_FORMAT_AUTO and any other value that doesn't cleanly map to HDMI just gets returned as HDMI_COLORSPACE_RGB. Add a second conversion function that gets a DRM_COLOR_FORMAT from an HDMI_COLORSPACE as well. In this case, reserved HDMI values that can't be converted will result in an -EINVAL return value. Co-developed-by: Marius Vlad <[email protected]> Signed-off-by: Marius Vlad <[email protected]> Signed-off-by: Nicolas Frattaroli <[email protected]> --- include/drm/drm_connector.h | 54 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index b5604dca728a..ffeb42f3b4a3 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -2612,6 +2612,60 @@ int drm_connector_attach_color_format_property(struct drm_connector *connector); const char *drm_get_color_format_name(enum drm_color_format color_fmt); +/** + * drm_color_format_to_hdmi_colorspace - convert DRM color format to HDMI + * @fmt: the &enum drm_color_format to convert + * + * Convert a given &enum drm_color_format to an equivalent + * &enum hdmi_colorspace. For non-representable values and + * %DRM_COLOR_FORMAT_AUTO, the value %HDMI_COLORSPACE_RGB is returned. + * + * Returns: the corresponding &enum hdmi_colorspace value + */ +static inline enum hdmi_colorspace __pure +drm_color_format_to_hdmi_colorspace(enum drm_color_format fmt) +{ + switch (fmt) { + default: + case DRM_COLOR_FORMAT_AUTO: + case DRM_COLOR_FORMAT_RGB444: + return HDMI_COLORSPACE_RGB; + case DRM_COLOR_FORMAT_YCBCR444: + return HDMI_COLORSPACE_YUV444; + case DRM_COLOR_FORMAT_YCBCR422: + return HDMI_COLORSPACE_YUV422; + case DRM_COLOR_FORMAT_YCBCR420: + return HDMI_COLORSPACE_YUV420; + } +} + +/** + * drm_color_format_from_hdmi_colorspace - convert HDMI color format to DRM + * @fmt: the &enum hdmi_colorspace to convert + * + * Convert a given &enum hdmi_colorspace to an equivalent + * &enum drm_color_format. For non-representable values, + * %-EINVAL is returned. + * + * Returns: the corresponding &enum drm_color_format value, or %-EINVAL + */ +static inline enum drm_color_format __pure +drm_color_format_from_hdmi_colorspace(enum hdmi_colorspace fmt) +{ + switch (fmt) { + default: + return -EINVAL; + case HDMI_COLORSPACE_RGB: + return DRM_COLOR_FORMAT_RGB444; + case HDMI_COLORSPACE_YUV444: + return DRM_COLOR_FORMAT_YCBCR444; + case HDMI_COLORSPACE_YUV422: + return DRM_COLOR_FORMAT_YCBCR422; + case HDMI_COLORSPACE_YUV420: + return DRM_COLOR_FORMAT_YCBCR420; + } +} + /** * drm_for_each_connector_iter - connector_list iterator macro * @connector: &struct drm_connector pointer used as cursor -- 2.52.0
