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drm/amd/display: Check power_down functions exist before calling 

[WHY]
The power_down() function was only defined for specific asics and will
crash the system if it is called by an asic with eDP connected that does
not have it defined.

[HOW]
Add a check for the function's existence before calling it.

Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sung Lee 2020-04-05 16:40:48 -04:00 committed by Alex Deucher
parent c97c8d77b1
commit d5e27f0728
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View File

@ -1378,8 +1378,11 @@ void dcn10_init_hw(struct dc *dc)
struct dc_link *edp_link = get_edp_link(dc);
if (edp_link &&
edp_link->link_enc->funcs->is_dig_enabled &&
edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc)) {
edp_link->link_enc->funcs->is_dig_enabled &&
edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
dc->hwss.edp_backlight_control &&
dc->hwss.power_down &&
dc->hwss.edp_power_control) {
dc->hwss.edp_backlight_control(edp_link, false);
dc->hwss.power_down(dc);
dc->hwss.edp_power_control(edp_link, false);