drm/amd/display: enable DP DSC Compliance automation

[Why]
Color depth data is not parsed during test requests.

[How]
Update display color depth according to color depth
request from the test equipment.

Signed-off-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 a92fc18..962e88d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2808,10 +2808,27 @@ static void dp_test_send_link_test_pattern(struct dc_link *link)
        enum dp_test_pattern test_pattern;
        enum dp_test_pattern_color_space test_pattern_color_space =
                        DP_TEST_PATTERN_COLOR_SPACE_UNDEFINED;
+       enum dc_color_depth requestColorDepth = COLOR_DEPTH_UNDEFINED;
+       struct pipe_ctx *pipes = link->dc->current_state->res_ctx.pipe_ctx;
+       struct pipe_ctx *pipe_ctx = NULL;
+       int i;
 
        memset(&dpcd_test_pattern, 0, sizeof(dpcd_test_pattern));
        memset(&dpcd_test_params, 0, sizeof(dpcd_test_params));
 
+       for (i = 0; i < MAX_PIPES; i++) {
+               if (pipes[i].stream == NULL)
+                       continue;
+
+               if (pipes[i].stream->link == link && !pipes[i].top_pipe && !pipes[i].prev_odm_pipe) {
+                       pipe_ctx = &pipes[i];
+                       break;
+               }
+       }
+
+       if (pipe_ctx == NULL)
+               return;
+
        /* get link test pattern and pattern parameters */
        core_link_read_dpcd(
                        link,
@@ -2849,6 +2866,29 @@ static void dp_test_send_link_test_pattern(struct dc_link *link)
                                DP_TEST_PATTERN_COLOR_SPACE_YCBCR709 :
                                DP_TEST_PATTERN_COLOR_SPACE_YCBCR601;
 
+       switch (dpcd_test_params.bits.BPC) {
+       case 0: // 6 bits
+               requestColorDepth = COLOR_DEPTH_666;
+               break;
+       case 1: // 8 bits
+               requestColorDepth = COLOR_DEPTH_888;
+               break;
+       case 2: // 10 bits
+               requestColorDepth = COLOR_DEPTH_101010;
+               break;
+       case 3: // 12 bits
+               requestColorDepth = COLOR_DEPTH_121212;
+               break;
+       default:
+               break;
+       }
+
+       if (requestColorDepth != COLOR_DEPTH_UNDEFINED
+                       && pipe_ctx->stream->timing.display_color_depth != requestColorDepth) {
+               pipe_ctx->stream->timing.display_color_depth = requestColorDepth;
+               dp_update_dsc_config(pipe_ctx);
+       }
+
        dc_link_dp_set_test_pattern(
                        link,
                        test_pattern,