drm/nv50/backlight: take the sor into account when bashing regs

I'm sure that out there somewhere, someone will need this.  We currently
haven't seen an example of LVDS being on a non-0 SOR so far though.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_backlight.c

@@ -37,6 +37,7 @@
 #include "nouveau_drv.h"
 #include "nouveau_drm.h"
 #include "nouveau_reg.h"
+#include "nouveau_encoder.h"
 
 static int
 nv40_get_intensity(struct backlight_device *bd)
@@ -96,18 +97,22 @@ nv40_backlight_init(struct drm_connector *connector)
 static int
 nv50_get_intensity(struct backlight_device *bd)
 {
-	struct drm_device *dev = bl_get_data(bd);
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct drm_device *dev = nv_encoder->base.base.dev;
+	int or = nv_encoder->or;
 
-	return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
+	return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT + (or * 0x800));
 }
 
 static int
 nv50_set_intensity(struct backlight_device *bd)
 {
-	struct drm_device *dev = bl_get_data(bd);
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct drm_device *dev = nv_encoder->base.base.dev;
 	int val = bd->props.brightness;
+	int or = nv_encoder->or;
 
-	nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
+	nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT + (or * 0x800),
 		val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
 	return 0;
 }
@@ -123,17 +128,28 @@ nv50_backlight_init(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_encoder *nv_encoder;
 	struct backlight_properties props;
 	struct backlight_device *bd;
+	int or;
+
+	nv_encoder = find_encoder(connector, OUTPUT_LVDS);
+	if (!nv_encoder) {
+		nv_encoder = find_encoder(connector, OUTPUT_DP);
+		if (!nv_encoder)
+			return -ENODEV;
+	}
+
+	or = nv_encoder->or;
 
-	if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
+	if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT + (or * 0x800)))
 		return 0;
 
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.max_brightness = 1025;
-	bd = backlight_device_register("nv_backlight", &connector->kdev, dev,
-				       &nv50_bl_ops, &props);
+	bd = backlight_device_register("nv_backlight", &connector->kdev,
+				       nv_encoder, &nv50_bl_ops, &props);
 	if (IS_ERR(bd))
 		return PTR_ERR(bd);
 
@@ -144,10 +160,10 @@ nv50_backlight_init(struct drm_connector *connector)
 }
 
 int
-nouveau_backlight_init(struct drm_connector *connector)
+nouveau_backlight_init(struct drm_device *dev)
 {
-	struct drm_device *dev = connector->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_connector *connector;
 
 #ifdef CONFIG_ACPI
 	if (acpi_video_backlight_support()) {
@@ -157,22 +173,28 @@ nouveau_backlight_init(struct drm_connector *connector)
 	}
 #endif
 
-	switch (dev_priv->card_type) {
-	case NV_40:
-		return nv40_backlight_init(connector);
-	case NV_50:
-		return nv50_backlight_init(connector);
-	default:
-		break;
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
+		    connector->connector_type != DRM_MODE_CONNECTOR_eDP)
+			continue;
+
+		switch (dev_priv->card_type) {
+		case NV_40:
+			return nv40_backlight_init(connector);
+		case NV_50:
+			return nv50_backlight_init(connector);
+		default:
+			break;
+		}
 	}
 
+
 	return 0;
 }
 
 void
-nouveau_backlight_exit(struct drm_connector *connector)
+nouveau_backlight_exit(struct drm_device *dev)
 {
-	struct drm_device *dev = connector->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 
 	if (dev_priv->backlight) {

drivers/gpu/drm/nouveau/nouveau_connector.c

@@ -39,7 +39,7 @@
 
 static void nouveau_connector_hotplug(void *, int);
 
-static struct nouveau_encoder *
+struct nouveau_encoder *
 find_encoder(struct drm_connector *connector, int type)
 {
 	struct drm_device *dev = connector->dev;
@@ -116,10 +116,6 @@ nouveau_connector_destroy(struct drm_connector *connector)
 				      nouveau_connector_hotplug, connector);
 	}
 
-	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
-	    connector->connector_type == DRM_MODE_CONNECTOR_eDP)
-		nouveau_backlight_exit(connector);
-
 	kfree(nv_connector->edid);
 	drm_sysfs_connector_remove(connector);
 	drm_connector_cleanup(connector);
@@ -901,10 +897,6 @@ nouveau_connector_create(struct drm_device *dev, int index)
 
 	drm_sysfs_connector_add(connector);
 
-	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
-	    connector->connector_type == DRM_MODE_CONNECTOR_eDP)
-		nouveau_backlight_init(connector);
-
 	dcb->drm = connector;
 	return dcb->drm;
 

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -1054,15 +1054,15 @@ static inline int nouveau_acpi_edid(struct drm_device *dev, struct drm_connector
 
 /* nouveau_backlight.c */
 #ifdef CONFIG_DRM_NOUVEAU_BACKLIGHT
-extern int nouveau_backlight_init(struct drm_connector *);
-extern void nouveau_backlight_exit(struct drm_connector *);
+extern int nouveau_backlight_init(struct drm_device *);
+extern void nouveau_backlight_exit(struct drm_device *);
 #else
-static inline int nouveau_backlight_init(struct drm_connector *dev)
+static inline int nouveau_backlight_init(struct drm_device *dev)
 {
 	return 0;
 }
 
-static inline void nouveau_backlight_exit(struct drm_connector *dev) { }
+static inline void nouveau_backlight_exit(struct drm_device *dev) { }
 #endif
 
 /* nouveau_bios.c */

drivers/gpu/drm/nouveau/nouveau_encoder.h

@@ -57,6 +57,9 @@ struct nouveau_encoder {
 	};
 };
 
+struct nouveau_encoder *
+find_encoder(struct drm_connector *connector, int type);
+
 static inline struct nouveau_encoder *nouveau_encoder(struct drm_encoder *enc)
 {
 	struct drm_encoder_slave *slave = to_encoder_slave(enc);

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -728,6 +728,8 @@ nouveau_card_init(struct drm_device *dev)
 	if (ret)
 		goto out_irq;
 
+	nouveau_backlight_init(dev);
+
 	if (dev_priv->eng[NVOBJ_ENGINE_GR]) {
 		ret = nouveau_fence_init(dev);
 		if (ret)
@@ -757,6 +759,7 @@ nouveau_card_init(struct drm_device *dev)
 out_fence:
 	nouveau_fence_fini(dev);
 out_disp:
+	nouveau_backlight_exit(dev);
 	engine->display.destroy(dev);
 out_irq:
 	nouveau_irq_fini(dev);
@@ -817,6 +820,7 @@ static void nouveau_card_takedown(struct drm_device *dev)
 		nouveau_fence_fini(dev);
 	}
 
+	nouveau_backlight_exit(dev);
 	engine->display.destroy(dev);
 	drm_mode_config_cleanup(dev);