backlight_level =
amdgpu_atombios_encoder_get_backlight_level_from_reg(adev);
dig = amdgpu_encoder->enc_priv;
dig->bl_dev = bd;
bd->props.brightness =
amdgpu_atombios_encoder_get_backlight_brightness(bd);
bd->props.power = FB_BLANK_UNBLANK;
backlight_update_status(bd);
DRM_INFO("amdgpu atom DIG backlight initialized\n");
u8
amdgpu_atombios_encoder_get_backlight_level_from_reg(struct amdgpu_device *adev)
{
u8 backlight_level;
u32 bios_2_scratch;
bios_2_scratch = RREG32(mmBIOS_SCRATCH_2);
backlight_level = ((bios_2_scratch & ATOM_S2_CURRENT_BL_LEVEL_MASK) >>
ATOM_S2_CURRENT_BL_LEVEL_SHIFT);
return backlight_level;
}
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https://bugs.launchpad.net/bugs/1802834
Title:
Dim screen after first boot on Thinkpad A285
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