drm/amd/display: Fix COLOR_SPACE_YCBCR2020_TYPE matrix

commit 973a9c810c785ac270a6d50d8cf862b0c1643a10 upstream.

The YCC conversion matrix for RGB -> COLOR_SPACE_YCBCR2020_TYPE is
missing the values for the fourth column of the matrix.

The fourth column of the matrix is essentially just a value that is
added given that the color is 3 components in size.
These values are needed to bias the chroma from the [-1, 1] -> [0, 1]
range.

This fixes color being very green when using Gamescope HDR on HDMI
output which prefers YCC 4:4:4.

Fixes: 40df2f809e8f ("drm/amd/display: color space ycbcr709 support")
Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Joshua Ashton <joshua@froggi.es>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c
index 7c2e3b8..95562ef 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c
@@ -90,8 +90,8 @@ static const struct out_csc_color_matrix_type output_csc_matrix[] = {
                { 0xE00, 0xF349, 0xFEB7, 0x1000, 0x6CE, 0x16E3,
                                0x24F, 0x200, 0xFCCB, 0xF535, 0xE00, 0x1000} },
        { COLOR_SPACE_YCBCR2020_TYPE,
-               { 0x1000, 0xF149, 0xFEB7, 0x0000, 0x0868, 0x15B2,
-                               0x01E6, 0x0000, 0xFB88, 0xF478, 0x1000, 0x0000} },
+               { 0x1000, 0xF149, 0xFEB7, 0x1004, 0x0868, 0x15B2,
+                               0x01E6, 0x201, 0xFB88, 0xF478, 0x1000, 0x1004} },
        { COLOR_SPACE_YCBCR709_BLACK_TYPE,
                { 0x0000, 0x0000, 0x0000, 0x1000, 0x0000, 0x0000,
                                0x0000, 0x0200, 0x0000, 0x0000, 0x0000, 0x1000} },