drm/nv40/pm: execute memory reset script from vbios

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bios.c

@@ -6776,6 +6776,16 @@ nouveau_bios_run_init_table(struct drm_device *dev, uint16_t table,
 	spin_unlock_bh(&bios->lock);
 }
 
+void
+nouveau_bios_init_exec(struct drm_device *dev, uint16_t table)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nvbios *bios = &dev_priv->vbios;
+	struct init_exec iexec = { true, false };
+
+	parse_init_table(bios, table, &iexec);
+}
+
 static bool NVInitVBIOS(struct drm_device *dev)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -1071,6 +1071,7 @@ extern void nouveau_bios_takedown(struct drm_device *dev);
 extern int nouveau_run_vbios_init(struct drm_device *);
 extern void nouveau_bios_run_init_table(struct drm_device *, uint16_t table,
 					struct dcb_entry *, int crtc);
+extern void nouveau_bios_init_exec(struct drm_device *, uint16_t table);
 extern struct dcb_gpio_entry *nouveau_bios_gpio_entry(struct drm_device *,
 						      enum dcb_gpio_tag);
 extern struct dcb_connector_table_entry *

drivers/gpu/drm/nouveau/nv40_pm.c

@@ -221,6 +221,7 @@ nv40_pm_clocks_set(struct drm_device *dev, void *pre_state)
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nv40_pm_state *info = pre_state;
 	unsigned long flags;
+	struct bit_entry M;
 	u32 crtc_mask = 0;
 	u8 sr1[2];
 	int i;
@@ -310,6 +311,10 @@ nv40_pm_clocks_set(struct drm_device *dev, void *pre_state)
 	nv_mask(dev, 0x100210, 0x80000000, 0x80000000);
 	udelay(100);
 
+	/* execute memory reset script from vbios */
+	if (!bit_table(dev, 'M', &M))
+		nouveau_bios_init_exec(dev, ROM16(M.data[0]));
+
 	/* make sure we're in vblank (hopefully the same one as before), and
 	 * then re-enable crtc memory access
 	 */