From: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
[Why]
On ASIC without ABM support (most dGPU) we run into a null pointer
dereference when attempting to set the backlight level.
[How]
This function requires ABM, so fix up the condition to only allow
DMCU to be optional.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Reviewed-by: Wyatt Wood <wyatt.w...@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.sique...@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 1c5c11d6347e..a926c1c3f57d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2462,8 +2462,7 @@ bool dc_link_set_backlight_level(const struct dc_link
*link,
int i;
DC_LOGGER_INIT(link->ctx->logger);
- if ((dmcu == NULL && abm == NULL) ||
- (abm->funcs->set_backlight_level_pwm == NULL))
+ if (abm == NULL || (abm->funcs->set_backlight_level_pwm == NULL))
return false;
if (dmcu)
--
2.26.0
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