[PATCH 09/14] drm/amd/display: Handle pixel format test request

[Stylon Wang]

From: Ilya Bakoulin <ilya.bakou...@amd.com>

[Why]
Some DSC tests fail because stream pixel encoding does not change
its value according to the type requested in the DPCD test params.

[How]
Set stream pixel encoding before updating DSC config and configuring
the test pattern.

Signed-off-by: Ilya Bakoulin <ilya.bakou...@amd.com>
Reviewed-by: Hanghong Ma <hanghong...@amd.com>
Acked-by: Stylon Wang <stylon.w...@amd.com>
---
 .../gpu/drm/amd/display/dc/core/dc_link_dp.c  | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

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 27c5d49a7bc1..ba4883fca616 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
@@ -2975,6 +2975,22 @@ static void dp_test_send_link_test_pattern(struct 
dc_link *link)
                break;
        }
 
+       switch (dpcd_test_params.bits.CLR_FORMAT) {
+       case 0:
+               pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_RGB;
+               break;
+       case 1:
+               pipe_ctx->stream->timing.pixel_encoding = 
PIXEL_ENCODING_YCBCR422;
+               break;
+       case 2:
+               pipe_ctx->stream->timing.pixel_encoding = 
PIXEL_ENCODING_YCBCR444;
+               break;
+       default:
+               pipe_ctx->stream->timing.pixel_encoding = PIXEL_ENCODING_RGB;
+               break;
+       }
+
+
        if (requestColorDepth != COLOR_DEPTH_UNDEFINED
                        && pipe_ctx->stream->timing.display_color_depth != 
requestColorDepth) {
                DC_LOG_DEBUG("%s: original bpc %d, changing to %d\n",
@@ -2982,9 +2998,10 @@ static void dp_test_send_link_test_pattern(struct 
dc_link *link)
                                pipe_ctx->stream->timing.display_color_depth,
                                requestColorDepth);
                pipe_ctx->stream->timing.display_color_depth = 
requestColorDepth;
-               dp_update_dsc_config(pipe_ctx);
        }
 
+       dp_update_dsc_config(pipe_ctx);
+
        dc_link_dp_set_test_pattern(
                        link,
                        test_pattern,
-- 
2.25.1

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