Commit 9df38728 authored by Antonio Gomes's avatar Antonio Gomes Committed by Karol Herbst
Browse files

drm/nouveau: Add support to control backlight using bl_power for nva3. 



Summary:

* Add support to turn on/off backlight when changing values in bl_power
  file. This is achieved by using function backlight_get_brightness()
  in nva3_set_intensity to get current brightness.

Test plan:

* Turn off:
echo 1 > /sys/class/backlight/nv_backlight/bl_power

* Turn on:
echo 0 > /sys/class/backlight/nv_backlight/bl_power

Signed-off-by: default avatarAntonio Gomes <antoniospg100@gmail.com>
Signed-off-by: default avatarKarol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221104220424.41164-1-antoniospg100@gmail.com
parent d23a6e3f

drivers/gpu/drm/nouveau/nouveau_backlight.c

+5 −1
Original line number Diff line number Diff line
@@ -264,7 +264,11 @@ nva3_set_intensity(struct backlight_device *bd) 
	u32 div, val;



	div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));

	val = (bd->props.brightness * div) / 100;



	val = backlight_get_brightness(bd);

	if (val)

		val = (val * div) / 100;



	if (div) {

		nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),

			  val |