diff options
| author | Takashi Iwai <[email protected]> | 2021-02-03 12:42:41 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2021-03-05 20:13:55 +0000 |
| commit | 7c20984795d7c26a8993ca2bd2c1cbad312b2ffa (patch) | |
| tree | a6d99a6c607fba501430bdf33946c4d15ae08910 /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | drm/amdgpu/display: handle aux backlight in backlight_get_brightness (diff) | |
| download | kernel-7c20984795d7c26a8993ca2bd2c1cbad312b2ffa.tar.gz kernel-7c20984795d7c26a8993ca2bd2c1cbad312b2ffa.zip | |
drm/amd/display: Add a backlight module option
There seem devices that don't work with the aux channel backlight
control. For allowing such users to test with the other backlight
control method, provide a new module option, aux_backlight, to specify
enabling or disabling the aux backport support explicitly. As
default, the aux support is detected by the hardware capability.
v2: make the backlight option generic in case we add future
backlight types (Alex)
BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=1180749
BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1438
Reviewed-by: Nicholas Kazlauskas <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index db03be054fad..aecf7baf219a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -783,6 +783,10 @@ uint amdgpu_dm_abm_level; MODULE_PARM_DESC(abmlevel, "ABM level (0 = off (default), 1-4 = backlight reduction level) "); module_param_named(abmlevel, amdgpu_dm_abm_level, uint, 0444); +int amdgpu_backlight = -1; +MODULE_PARM_DESC(backlight, "Backlight control (0 = pwm, 1 = aux, -1 auto (default))"); +module_param_named(backlight, amdgpu_backlight, bint, 0444); + /** * DOC: tmz (int) * Trusted Memory Zone (TMZ) is a method to protect data being written |