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drm/radeon: add get_backlight_level callback

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Read back the backlight level from the hw.
Needed for proper backlight restoration on resume.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2012-09-14 09:59:26 -04:00
parent 2e3b3b105a
commit 6d92f81dcf
5 changed files with 49 additions and 0 deletions
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2
drivers/gpu/drm/radeon/radeon_asic.h
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@@ -43,7 +43,9 @@ void radeon_atom_set_memory_clock(struct radeon_device *rdev, uint32_t mem_clock
void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable);
void atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level);
u8 atombios_get_backlight_level(struct radeon_encoder *radeon_encoder);
void radeon_legacy_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level);
u8 radeon_legacy_get_backlight_level(struct radeon_encoder *radeon_encoder);
/*