Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.3 013/292] drm/amd/display: Handle virtual signal type in disable_link() | Date | Tue, 10 Dec 2019 16:20:32 -0500 |
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From: Martin Tsai <martin.tsai@amd.com>
[ Upstream commit 616f5b65f1c02d3d6ae370644670d14c57de2fd8 ]
[Why] The new implementation changed the behavior to allow process setMode to DAL when DAL returns empty mode query for unplugged display. This will trigger additional disable_link(). When unplug HDMI from MST dock, driver will update stream->signal to "Virtual". disable_link() will call disable_output() if the signal type is not DP and induce other displays on MST dock show black screen.
[How] Don't need to process disable_output() if the signal type is virtual.
Signed-off-by: Martin Tsai <martin.tsai@amd.com> Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> Acked-by: Leo Li <sunpeng.li@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 | 6 ++++-- 1 file changed, 4 insertions(+), 2 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 355b4ba127966..90217cf83ce17 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2157,8 +2157,10 @@ static void disable_link(struct dc_link *link, enum signal_type signal) dp_set_fec_ready(link, false); } #endif - } else - link->link_enc->funcs->disable_output(link->link_enc, signal); + } else { + if (signal != SIGNAL_TYPE_VIRTUAL) + link->link_enc->funcs->disable_output(link->link_enc, signal); + } if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { /* MST disable link only when no stream use the link */ -- 2.20.1
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