[RFC 0/6] drm/i915/dp: Preliminary support for DP YCbCr4:2:0 outputs

Gwan-gyeong Mun
2019-01-31T21:10:48Z

On Gen 11 platform, to enable resolutions like 5K@120 (or higher) we need
to use DSC (DP 1.4) or YCbCr4:2:0 (DP 1.3 or 1.4) on DP.
In order to support YCbCr4:2:0 on DP we need to program YCBCR 4:2:0
to MSA and VSC SDP.

This patches are RFC patches that add a VSC structure for handling
Pixel Encoding/Colorimetry Formats and program YCBCR 4:2:0 to MSA and VSC SDP.

This is currently not tested, but I wanted to get some inputs on this approach.
The idea of a scaling (RGB -> YCbCr4:4:4 -> YCbCr 4:2:0) is to follow the
same approach used in YCbCr 4:2:0 on HDMI.

Gwan-gyeong Mun (6):
drm/i915/dp: Support DP ports YUV 4:2:0 output to GEN11
drm/i915/dp: Add a config function for YCBCR420 outputs
drm: Add a VSC structure for handling Pixel Encoding/Colorimetry
Formats
drm/i915/dp: Program VSC Header and DB for Pixel Encoding/Colorimetry
Format
drm/i915/dp: Add a support of YCBCR 4:2:0 to DP MSA
drm/i915/dp: Update pipe_bpp for DP YCbCr4:2:0 outputs

drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_ddi.c | 16 +++-
drivers/gpu/drm/i915/intel_dp.c | 147 +++++++++++++++++++++++++++++--
drivers/gpu/drm/i915/intel_drv.h | 2 +
include/drm/drm_dp_helper.h | 17 ++++
5 files changed, 176 insertions(+), 7 deletions(-)

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2.20.1