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HDMI 2.0 introduces a new sampling mode called YCbCr 4:2:0. According to the spec the EDID may contain two blocks that signal this sampling mode: - YCbCr 4:2:0 Video Data Block - YCbCr 4:2:0 Video Capability Map Data Block The video data block contains the list of vic's were only YCbCr 4:2:0 sampling mode shall be used while the video capability map data block contains a mask were YCbCr 4:2:0 sampling mode may be used. This RFC patch adds support for parsing these two new blocks and introduces new flags to signal the drivers if the mode is 4:2:0'only or 4:2:0'able. The reason this is still a RFC is because there is no reference in kernel for this new sampling mode (specially in AVI infoframe part), so, I was hoping to hear some feedback first. Tested in a HDMI 2.0 compliance scenario. Signed-off-by: Jose Abreu <joabreu@synopsys.com> Cc: Carlos Palminha <palminha@synopsys.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: David Airlie <airlied@linux.ie> Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org (am from https://patchwork.kernel.org/patch/9495175) Change-Id: I7c9e331b5bf5f1fbcefd4368bc4b82ff180eb91e Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>