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    Subject[PATCH 5.4 189/434] drm/amd/display: setting the DIG_MODE to the correct value.
    Date
    From: Zhan liu <zhan.liu@amd.com>

    [ Upstream commit 967a3b85bac91c55eff740e61bf270c2732f48b2 ]

    [Why]
    This patch is for fixing Navi14 HDMI display pink screen issue.

    [How]
    Call stream->link->link_enc->funcs->setup twice. This is setting
    the DIG_MODE to the correct value after having been overridden by
    the call to transmitter control.

    Signed-off-by: Zhan Liu <zhan.liu@amd.com>
    Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/display/dc/core/dc_link.c | 9 +++++++++
    1 file changed, 9 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 efc1d30544bb..067f5579f452 100644
    --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
    +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
    @@ -2769,6 +2769,15 @@ void core_link_enable_stream(
    CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
    COLOR_DEPTH_UNDEFINED);

    + /* This second call is needed to reconfigure the DIG
    + * as a workaround for the incorrect value being applied
    + * from transmitter control.
    + */
    + 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) ||
    --
    2.20.1


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