From: Kai-Heng Feng Date: Mon, 2 Sep 2019 08:33:42 +0000 (+0800) Subject: drm/amd/display: Restore backlight brightness after system resume X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=c7c5be3c892fd33b9c9ff1d4a5570b85e6deec0b;p=uclinux-h8%2Flinux.git drm/amd/display: Restore backlight brightness after system resume Laptops with AMD APU doesn't restore display backlight brightness after system resume. This issue started when DC was introduced. Let's use BL_CORE_SUSPENDRESUME so the backlight core calls update_status callback after system resume to restore the backlight level. Tested on Dell Inspiron 3180 (Stoney Ridge) and Dell Latitude 5495 (Raven Ridge). Signed-off-by: Kai-Heng Feng Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index be44047dbf4a..2220235952ac 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2180,6 +2180,7 @@ static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd) } static const struct backlight_ops amdgpu_dm_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, .get_brightness = amdgpu_dm_backlight_get_brightness, .update_status = amdgpu_dm_backlight_update_status, };