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drm/amdgpu: Restore LCD backlight level on resume 

Instead of only enabling the backlight (which seems to set it to max
brightness), just re-set the current backlight level, which also takes
care of enabling the backlight if necessary.

Port of radeon commit:
drm/radeon: Restore LCD backlight level on resume (>= R5xx)

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-09-29 13:53:30 -04:00
parent 4281f46ef8
commit 74b3112e95
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
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@ -1279,8 +1279,7 @@ amdgpu_atombios_encoder_setup_dig(struct drm_encoder *encoder, int action)
amdgpu_atombios_encoder_setup_dig_encoder(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0);
}
if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
amdgpu_atombios_encoder_setup_dig_transmitter(encoder,
ATOM_TRANSMITTER_ACTION_LCD_BLON, 0, 0);
amdgpu_atombios_encoder_set_backlight_level(amdgpu_encoder, dig->backlight_level);
if (ext_encoder)
amdgpu_atombios_encoder_setup_external_encoder(encoder, ext_encoder, ATOM_ENABLE);
} else {