diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2014-11-19 18:12:54 (GMT) |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2014-11-20 16:12:55 (GMT) |
| commit | b7bc596ebbe0cddc97d76ef9309f64471bbf13eb (patch) | |
| tree | 1856c2479af75c1f10b769dba3e7d5491fcaef5d | |
| parent | bcfef97398972de555e6e1dbf4dac33f0db38d52 (diff) | |
| download | linux-b7bc596ebbe0cddc97d76ef9309f64471bbf13eb.tar.xz | |
drm/radeon: disable native backlight control on pre-r6xx asics (v2)
Just use the acpi interface. That's what windows uses on this
generation and it's the only thing that seems to work reliably
on these generation parts.
You can still force the native backlight interface by setting
radeon.backlight=1
Bug:
https://bugzilla.kernel.org/show_bug.cgi?id=88501
v2: merge into above if/else block
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_encoders.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c index 9a19e52..6b670b0 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -179,6 +179,9 @@ static void radeon_encoder_add_backlight(struct radeon_encoder *radeon_encoder, (rdev->pdev->subsystem_vendor == 0x1734) && (rdev->pdev->subsystem_device == 0x1107)) use_bl = false; + /* disable native backlight control on older asics */ + else if (rdev->family < CHIP_R600) + use_bl = false; else use_bl = true; } |