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drm/amd/display: System Hang When System enters to S0i3 w/ iGPU

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[why]
System Hang when system enters to S0i3 w/ iGPU
some link_enc are NULL due to BIOS integration info table not correct,
but driver should have enough null pointer protection.

Reviewed-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2026-03-05 10:14:39 -05:00 committed by Alex Deucher
parent 058cb97b73
commit 6c36d8b0c9
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/hwss/dcn42/dcn42_hwseq.c
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@ -203,7 +203,8 @@ void dcn42_init_hw(struct dc *dc)
for (i = 0; i < dc->link_count; i++) {
struct dc_link *link = dc->links[i];
if (link->link_enc->funcs->is_dig_enabled &&
if (link && link->link_enc &&
link->link_enc->funcs->is_dig_enabled &&
link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
hws->funcs.power_down) {
hws->funcs.power_down(dc);