diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2026-03-20 19:33:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 14:25:47 +0300 |
| commit | 60b0524bfb7d691ab378cdc788209f11cd34da89 (patch) | |
| tree | 8abefaedb467ce5eeb18b65937c1c0f55fa702d8 /drivers/gpu | |
| parent | 52db857e94b9be4e6315586602b0257d1d2b165a (diff) | |
| download | linux-60b0524bfb7d691ab378cdc788209f11cd34da89.tar.xz | |
drm/amd/display: check if ext_caps is valid in BL setup
commit 9da4f9964abcaeb6e19797d5e3b10faad338a786 upstream.
LVDS connectors don't have extended backlight caps so check
if the pointer is valid before accessing it.
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/5012
Fixes: 1454642960b0 ("drm/amd: Re-introduce property to control adaptive backlight modulation")
Cc: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 3f797396d7f4eb9bb6eded184bbc6f033628a6f6)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index b5fa8aacda8a..6c5a1ba4cb00 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5406,7 +5406,7 @@ static void setup_backlight_device(struct amdgpu_display_manager *dm, caps = &dm->backlight_caps[aconnector->bl_idx]; /* Only offer ABM property when non-OLED and user didn't turn off by module parameter */ - if (!caps->ext_caps->bits.oled && amdgpu_dm_abm_level < 0) + if (caps->ext_caps && !caps->ext_caps->bits.oled && amdgpu_dm_abm_level < 0) drm_object_attach_property(&aconnector->base.base, dm->adev->mode_info.abm_level_property, ABM_SYSFS_CONTROL); |