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| author | Alex Deucher <alexander.deucher@amd.com> | 2012-09-14 09:59:26 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2012-09-27 10:22:41 -0400 |
| commit | 6d92f81dcf2d40b8ebb947bba5435642b830f649 (patch) | |
| tree | 9a9f606f27c6e0007d473727326b5b761186c331 /drivers/gpu/drm/radeon/atombios_encoders.c | |
| parent | 2e3b3b105ab3bb5b6a37198da4f193cd13781d13 (diff) | |
drm/radeon: add get_backlight_level callback
Read back the backlight level from the hw.
Needed for proper backlight restoration on resume.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_encoders.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_encoders.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index 266036b10fe..5ce13b8fbe6 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -72,6 +72,18 @@ radeon_atom_set_backlight_level_to_reg(struct radeon_device *rdev, WREG32(RADEON_BIOS_2_SCRATCH, bios_2_scratch); } +u8 +atombios_get_backlight_level(struct radeon_encoder *radeon_encoder) +{ + struct drm_device *dev = radeon_encoder->base.dev; + struct radeon_device *rdev = dev->dev_private; + + if (!(rdev->mode_info.firmware_flags & ATOM_BIOS_INFO_BL_CONTROLLED_BY_GPU)) + return 0; + + return radeon_atom_get_backlight_level_from_reg(rdev); +} + void atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level) { |