[10/25] drm/amd/display: Handle virtual signal type in disable_link()

Submitted by Li, Sun peng (Leo) on Sept. 10, 2019, 1:54 p.m.


Message ID 20190910135445.18300-11-sunpeng.li@amd.com
State New
Headers show
Series "DC Patches 09 Sep 2019" ( rev: 1 ) in AMD X.Org drivers

Not browsing as part of any series.

Commit Message

Li, Sun peng (Leo) Sept. 10, 2019, 1:54 p.m.
From: Martin Tsai <martin.tsai@amd.com>

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.

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>
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Patch hide | download patch | download mbox

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 1307b533a3f8..de07577085ce 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2166,8 +2166,10 @@  static void disable_link(struct dc_link *link, enum signal_type signal)
 			dp_set_fec_ready(link, false);
-	} 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);
+	}
 		/* MST disable link only when no stream use the link */