[PATCH v2] drm/amd/display: Modify display link stream setup sequence.

[Liu, Zhan]

[Why]
This patch is for fixing Navi14 pink screen issue. With this
patch, stream->link->link_enc->funcs->setup will be called
twice: this will make sure GC_SEND is set to 1. Though we
still need to look into why the issue only happens on
Linux, but not on Windows side.

[How]
Call stream->link->link_enc->funcs->setup twice.

Signed-off-by: Zhan liu <zhan.liu at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++++
 1 file changed, 6 insertions(+)

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 935053664160..8683e8613ec2 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2842,6 +2842,12 @@ void core_link_enable_stream(
                                        CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
                                        COLOR_DEPTH_UNDEFINED);

+               /* Hack on Navi14: fixes Navi14 HDMI pink screen issue */
+               if (!dc_is_virtual_signal(pipe_ctx->stream->signal))
+                       stream->link->link_enc->funcs->setup(
+                               stream->link->link_enc,
+                               pipe_ctx->stream->signal);
+
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
                if (pipe_ctx->stream->timing.flags.DSC) {
                        if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
--
2.17.0
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