Commit 63ad5371 authored by Mario Limonciello's avatar Mario Limonciello Committed by Alex Deucher
Browse files

drm/amd/display: explicitly set is_dsc_supported to false before use 

When UBSAN is enabled a case is shown on unplugging the display that
this variable hasn't been initialized by `update_dsc_caps`, presumably
when the display was unplugged it wasn't copied from the DPCD.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1956497


Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b54ce6c9

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+1 −0
Original line number Diff line number Diff line
@@ -6097,6 +6097,7 @@ static void update_dsc_caps(struct amdgpu_dm_connector *aconnector, 
							struct dsc_dec_dpcd_caps *dsc_caps)

{

	stream->timing.flags.DSC = 0;

	dsc_caps->is_dsc_supported = false;



	if (aconnector->dc_link && (sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT ||

		sink->sink_signal == SIGNAL_TYPE_EDP)) {