Applied. Thanks!

Alex

On Mon, Sep 2, 2019 at 4:16 PM Kai-Heng Feng kai.heng.feng@canonical.com wrote:

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).

Cc: stable@vger.kernel.org Signed-off-by: Kai-Heng Feng kai.heng.feng@canonical.com

---

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 + 1 file changed, 1 insertion(+)

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 1b0949dd7808..183ef18ac6f3 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2111,6 +2111,7 @@ 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,
  

};

2.17.1

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