shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-10 12:57:06 +09:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: Handle virtual signal type in disable_link()

Browse Source 
[ Upstream commit 616f5b65f1 ]

[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>
This commit is contained in:
Martin Tsai
2019-08-22 10:02:13 +08:00
committed by Greg Kroah-Hartman
parent 56997f310d
commit 67a0b5676c
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@@ -2169,8 +2169,10 @@ 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 */