drm/amd/display: Check dc_link before applying DSC policy

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apply_dsc_policy_for_stream() decides whether Display Stream Compression
(DSC) should be enabled for a display stream based on display
capabilities, link bandwidth and user overrides.

Smatch reports that apply_dsc_policy_for_stream() dereferences
aconnector->dc_link before checking whether it is NULL.

Add an early NULL check for aconnector->dc_link before the first
dereference and remove the later redundant NULL check in the HDMI_FRL
path.

Fixes: 0e967e086e ("drm/amd/display: Extract connector and encoder code to amdgpu_dm_connector")
Reported-by: Dan Carpenter <error27@gmail.com>
Cc: Roman Li <roman.li@amd.com>
Cc: Alex Hung <alex.hung@amd.com>
Cc: Tom Chung <chiahsuan.chung@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: George Zhang <george.zhang@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Srinivasan Shanmugam 2026-06-22 14:58:52 +05:30 • committed by Alex Deucher

parent ffa0cfa9d6

commit c96d79332e

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_connector.c

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