Applied. Thanks! Alex
On Wed, May 15, 2024 at 5:47 PM Kendall Smith <kendall...@icloud.com> wrote: > > If a Radeon 6750M GPU from an iMac12,1 is installed into an iMac 12,2, there > is no backlight device initialized during boot. Everything else is > functional, but the display brightness cannot be controlled. There are no > directories present in /sys/class/backlight after booting. A simple one line > modification to an if statement fixes this issue by initializing the radeon > backlight device for an iMac12,2 as well if it has a 6750M. After the patch, > brightness can be controlled and radeon_bl0 is present in > /sys/class/backlight. This was tested by compiling the latest kernel with and > without the patch. > > Signed-off-by: Kendall Smith <kendall...@icloud.com> > --- > drivers/gpu/drm/radeon/atombios_encoders.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c > b/drivers/gpu/drm/radeon/atombios_encoders.c > index 2bff0d9e20f5..7b11674f5d45 100644 > --- a/drivers/gpu/drm/radeon/atombios_encoders.c > +++ b/drivers/gpu/drm/radeon/atombios_encoders.c > @@ -201,7 +201,7 @@ void radeon_atom_backlight_init(struct radeon_encoder > *radeon_encoder, > */ > if ((rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) && > (rdev->pdev->device == 0x6741) && > - !dmi_match(DMI_PRODUCT_NAME, "iMac12,1")) > + !(dmi_match(DMI_PRODUCT_NAME, "iMac12,1") || > dmi_match(DMI_PRODUCT_NAME, "iMac12,2"))) > return; > > if (!radeon_encoder->enc_priv) > -- > 2.34.1 >
