[PATCH] drm/amd/display: Modify display link stream setup sequence.

[Liu, Zhan]

From: Zhan Liu <zhan.liu at amd.com>

[Why]
When a specific kind of connector is detected,
DC needs to set the attribute of the stream.
This step needs to be done before enabling link,
or some bugs (e.g. display won't light up)
will be observed.

[How]
Setting the attribute of the stream first, then
enabling stream.

Signed-off-by: Zhan Liu <zhan.liu at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index fb18681b502b..713caab82837 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2745,16 +2745,6 @@ void core_link_enable_stream(
                        dc_is_virtual_signal(pipe_ctx->stream->signal))
                return;

-       if (!dc_is_virtual_signal(pipe_ctx->stream->signal)) {
-               stream->link->link_enc->funcs->setup(
-                       stream->link->link_enc,
-                       pipe_ctx->stream->signal);
-               pipe_ctx->stream_res.stream_enc->funcs->setup_stereo_sync(
-                       pipe_ctx->stream_res.stream_enc,
-                       pipe_ctx->stream_res.tg->inst,
-                       stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE);
-       }
-
        if (dc_is_dp_signal(pipe_ctx->stream->signal))
                pipe_ctx->stream_res.stream_enc->funcs->dp_set_stream_attribute(
                        pipe_ctx->stream_res.stream_enc,
@@ -2841,6 +2831,16 @@ void core_link_enable_stream(
                                        CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
                                        COLOR_DEPTH_UNDEFINED);

+               if (!dc_is_virtual_signal(pipe_ctx->stream->signal)) {
+                       stream->link->link_enc->funcs->setup(
+                               stream->link->link_enc,
+                               pipe_ctx->stream->signal);
+                       pipe_ctx->stream_res.stream_enc->funcs->setup_stereo_sync(
+                               pipe_ctx->stream_res.stream_enc,
+                               pipe_ctx->stream_res.tg->inst,
+                               stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE);
+               }
+
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
                if (pipe_ctx->stream->timing.flags.DSC) {
                        if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
--
2.17.1