diff options
| author | Nicholas Bishop <nicholasbishop@google.com> | 2022-02-11 14:57:39 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-23 11:59:56 +0100 |
| commit | 13f6ebef03b0359fac82a8460454374098f66995 (patch) | |
| tree | 9917d873c6e5e3988ddf6a30ab83a828a56a8e3d /drivers/gpu | |
| parent | 494de920d98f125b099f27a2d274850750aff957 (diff) | |
drm/radeon: Fix backlight control on iMac 12,1
commit 364438fd629f7611a84c8e6d7de91659300f1502 upstream.
The iMac 12,1 does not use the gmux driver for backlight, so the radeon
backlight device is needed to set the brightness.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1838
Signed-off-by: Nicholas Bishop <nicholasbishop@google.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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/radeon/atombios_encoders.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index cc8f32a1b03c..92ffed5c1d69 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -197,7 +197,8 @@ void radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder, * so don't register a backlight device */ if ((rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) && - (rdev->pdev->device == 0x6741)) + (rdev->pdev->device == 0x6741) && + !dmi_match(DMI_PRODUCT_NAME, "iMac12,1")) return; if (!radeon_encoder->enc_priv) |