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| author | Arun R Murthy <arun.r.murthy@intel.com> | 2022-08-08 09:27:50 +0530 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2022-08-23 21:27:21 -0400 |
| commit | 868e8e5156a1f8d92ca83fdbac6fd52798650792 (patch) | |
| tree | fbc7f0ae9df2925ee3e55a48eea8939703a7d39a /drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | |
| parent | 13393f65b77445d8b0f99c7b605cc9ccc936586f (diff) | |
drm/i915/display: avoid warnings when registering dual panel backlight
Commit 20f85ef89d94 ("drm/i915/backlight: use unique backlight device
names") added support for multiple backlight devices on dual panel
systems, but did so with error handling on -EEXIST from
backlight_device_register(). Unfortunately, that triggered a warning in
dmesg all the way down from sysfs_add_file_mode_ns() and
sysfs_warn_dup().
Instead of optimistically always attempting to register with the default
name ("intel_backlight", which we have to retain for backward
compatibility), check if a backlight device with the name exists first,
and, if so, use the card and connector based name.
v2: reworked on top of the patch commit 20f85ef89d94
("drm/i915/backlight: use unique backlight device names")
v3: fixed the ref count leak(Jani N)
Fixes: 20f85ef89d94 ("drm/i915/backlight: use unique backlight device names")
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220808035750.3111046-1-arun.r.murthy@intel.com
(cherry picked from commit 4234ea30051200fc6016de10e4d58369e60b38f1)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c')
0 files changed, 0 insertions, 0 deletions