Commit d5e27f07 authored Apr 05, 2020 by Sung Lee Committed by Alex Deucher Apr 09, 2020

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>

parent c97c8d77

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -1379,7 +1379,10 @@ void dcn10_init_hw(struct dc *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) &&
		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);

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