linux-kernel - [PATCH AUTOSEL 5.6 016/149] drm/amd/display: Fix test pattern color space inconsistency for Linux

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Date:   Sat, 11 Apr 2020 19:01:33 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     "Jerry (Fangzhi) Zuo" <Jerry.Zuo@....com>,
        Hersen Wu <hersenxs.wu@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.6 016/149] drm/amd/display: Fix test pattern color space inconsistency for Linux

From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@....com>

[ Upstream commit ef65c702d40637ed9ee25edc8e8a994168a32377 ]

[why]
When reprogram MSA with updated color space, the test color space shows
inconsistency. Linux has separate routine to set up test pattern color
space, but it fails to configure RGB.

[How]
Add RGB to test pattern.

Fixes: 43563bc2e6a769 ("drm/amd/display: update MSA and VSC SDP on video test pattern request")
Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@....com>
Reviewed-by: Hersen Wu <hersenxs.wu@....com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index fd9e69634c50a..f01bc378a51ee 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2654,9 +2654,12 @@ static void dp_test_send_link_test_pattern(struct dc_link *link)
 	break;
 	}
 
-	test_pattern_color_space = dpcd_test_params.bits.YCBCR_COEFS ?
-			DP_TEST_PATTERN_COLOR_SPACE_YCBCR709 :
-			DP_TEST_PATTERN_COLOR_SPACE_YCBCR601;
+	if (dpcd_test_params.bits.CLR_FORMAT == 0)
+		test_pattern_color_space = DP_TEST_PATTERN_COLOR_SPACE_RGB;
+	else
+		test_pattern_color_space = dpcd_test_params.bits.YCBCR_COEFS ?
+				DP_TEST_PATTERN_COLOR_SPACE_YCBCR709 :
+				DP_TEST_PATTERN_COLOR_SPACE_YCBCR601;
 
 	dc_link_dp_set_test_pattern(
 			link,
-- 
2.20.1