drm: Add DP1.4 VSC SDP Payload related Data Structures
It adds new enumeration definitions for VSC SDP Payload for Pixel Encoding/Colorimetry Format. And it adds a new drm data structure for DP VSC SDP. enum dp_colorspace and enum dp_colorimetry correspond "Pixel Encoding and Colorimetry Formats". enum dp_dynamic_range corresponds "Dynamic Range". And enum dp_content_type corresponds "Content Type" All of them are based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through DB18]. v3: Add a new drm data structure for DP VSC SDP v5: Addressed review comments from Uma - Add kernel docs for added data structures - Rename enum dp_colorspace to dp_pixelformat - Polish commit message - Fix typos - Drop self-explanatory comments Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200211074657.231405-2-gwan-gyeong.mun@intel.com
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