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drm/amd/display: Check NULL before calling dac_load_detection

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dac_load_detection can be NULL in some scenario, so checking it before
calling.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 179176134b)
This commit is contained in:
Alex Hung 2025-12-08 12:11:43 -07:00 committed by Alex Deucher
parent 0de604d035
commit eb236fb911
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/dc/link/link_detection.c
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@ -932,7 +932,7 @@ static bool link_detect_dac_load_detect(struct dc_link *link)
struct link_encoder *link_enc = link->link_enc;
enum engine_id engine_id = link_enc->preferred_engine;
enum dal_device_type device_type = DEVICE_TYPE_CRT;
enum bp_result bp_result;
enum bp_result bp_result = BP_RESULT_UNSUPPORTED;
uint32_t enum_id;
switch (engine_id) {
@ -946,7 +946,9 @@ static bool link_detect_dac_load_detect(struct dc_link *link)
break;
}
bp_result = bios->funcs->dac_load_detection(bios, engine_id, device_type, enum_id);
if (bios->funcs->dac_load_detection)
bp_result = bios->funcs->dac_load_detection(bios, engine_id, device_type, enum_id);
return bp_result == BP_RESULT_OK;
}