drm/nouveau/bl: fix backlight regression

Fixes: 3c66c87dc9 ("drm/nouveau/disp: remove hw-specific customisation
of output paths")
Suggested-by: Ben Skeggs <skeggsb@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
index f56f60f..debbbf0 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_backlight.c
+++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
@@ -134,7 +134,7 @@ nv50_get_intensity(struct backlight_device *bd)
        struct nouveau_encoder *nv_encoder = bl_get_data(bd);
        struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
        struct nvif_object *device = &drm->client.device.object;
-       int or = nv_encoder->or;
+       int or = ffs(nv_encoder->dcb->or) - 1;
        u32 div = 1025;
        u32 val;
 
@@ -149,7 +149,7 @@ nv50_set_intensity(struct backlight_device *bd)
        struct nouveau_encoder *nv_encoder = bl_get_data(bd);
        struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
        struct nvif_object *device = &drm->client.device.object;
-       int or = nv_encoder->or;
+       int or = ffs(nv_encoder->dcb->or) - 1;
        u32 div = 1025;
        u32 val = (bd->props.brightness * div) / 100;
 
@@ -170,7 +170,7 @@ nva3_get_intensity(struct backlight_device *bd)
        struct nouveau_encoder *nv_encoder = bl_get_data(bd);
        struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
        struct nvif_object *device = &drm->client.device.object;
-       int or = nv_encoder->or;
+       int or = ffs(nv_encoder->dcb->or) - 1;
        u32 div, val;
 
        div  = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
@@ -188,7 +188,7 @@ nva3_set_intensity(struct backlight_device *bd)
        struct nouveau_encoder *nv_encoder = bl_get_data(bd);
        struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
        struct nvif_object *device = &drm->client.device.object;
-       int or = nv_encoder->or;
+       int or = ffs(nv_encoder->dcb->or) - 1;
        u32 div, val;
 
        div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
@@ -228,7 +228,7 @@ nv50_backlight_init(struct drm_connector *connector)
                        return -ENODEV;
        }
 
-       if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
+       if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)))
                return 0;
 
        if (drm->client.device.info.chipset <= 0xa0 ||