On Thu, 2018-08-23 at 14:00 +0200, Karol Herbst wrote:

Patches 1-5 are Reviewed-by: Karol Herbst kherbst@redhat.com

I think it might be worth to test those patches on a system without any backlight devices just to verify we don't break things, but the code looked good already, so maybe we don't really need to test.

Did! The P50 lets you switch between dedicated GPU mode and hybrid GPU mode, and it switches backlight control between the intel and nvidia GPUs. Seemed to work just fine for me

On Thu, Aug 23, 2018 at 3:21 AM, Lyude Paul lyude@redhat.com wrote:

...

Remember, ida IDs start at 0, not 1!

Signed-off-by: Lyude Paul lyude@redhat.com Cc: stable@vger.kernel.org Cc: Jeffery Miller jmiller@neverware.com Cc: Karol Herbst kherbst@redhat.com

---

drivers/gpu/drm/nouveau/nouveau_backlight.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c index 408b955e5c39..6dd72bc32897 100644 --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c @@ -116,7 +116,7 @@ nv40_backlight_init(struct drm_connector *connector) &nv40_bl_ops, &props);

    if (IS_ERR(bd)) {

•           if (bl_connector.id > 0)
  

•           if (bl_connector.id >= 0)
                    ida_simple_remove(&bl_ida, bl_connector.id);
            return PTR_ERR(bd);
    }
  

@@ -249,7 +249,7 @@ nv50_backlight_init(struct drm_connector *connector) nv_encoder, ops, &props);

    if (IS_ERR(bd)) {

•           if (bl_connector.id > 0)
  

•           if (bl_connector.id >= 0)
                    ida_simple_remove(&bl_ida, bl_connector.id);
            return PTR_ERR(bd);
    }
  

-- 2.17.1