drm/nouveau: Implement the vblank DRM hooks.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_display.c

@@ -29,6 +29,7 @@
 #include "nouveau_drv.h"
 #include "nouveau_fb.h"
 #include "nouveau_fbcon.h"
+#include "nouveau_hw.h"
 
 static void
 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
@@ -104,3 +105,29 @@ const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 	.output_poll_changed = nouveau_fbcon_output_poll_changed,
 };
 
+int
+nouveau_vblank_enable(struct drm_device *dev, int crtc)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+	if (dev_priv->card_type >= NV_50)
+		nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, 0,
+			NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc));
+	else
+		NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0,
+			    NV_PCRTC_INTR_0_VBLANK);
+
+	return 0;
+}
+
+void
+nouveau_vblank_disable(struct drm_device *dev, int crtc)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+	if (dev_priv->card_type >= NV_50)
+		nv_mask(dev, NV50_PDISPLAY_INTR_EN_1,
+			NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc), 0);
+	else
+		NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0, 0);
+}

drivers/gpu/drm/nouveau/nouveau_drv.c

@@ -397,6 +397,9 @@ static struct drm_driver driver = {
 	.irq_postinstall = nouveau_irq_postinstall,
 	.irq_uninstall = nouveau_irq_uninstall,
 	.irq_handler = nouveau_irq_handler,
+	.get_vblank_counter = drm_vblank_count,
+	.enable_vblank = nouveau_vblank_enable,
+	.disable_vblank = nouveau_vblank_disable,
 	.reclaim_buffers = drm_core_reclaim_buffers,
 	.ioctls = nouveau_ioctls,
 	.fops = {
@@ -407,6 +410,7 @@ static struct drm_driver driver = {
 		.mmap = nouveau_ttm_mmap,
 		.poll = drm_poll,
 		.fasync = drm_fasync,
+		.read = drm_read,
 #if defined(CONFIG_COMPAT)
 		.compat_ioctl = nouveau_compat_ioctl,
 #endif

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -1312,6 +1312,10 @@ extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
 extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
 				  struct drm_file *);
 
+/* nouveau_display.c */
+int nouveau_vblank_enable(struct drm_device *dev, int crtc);
+void nouveau_vblank_disable(struct drm_device *dev, int crtc);
+
 /* nv10_gpio.c */
 int nv10_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag);
 int nv10_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state);

drivers/gpu/drm/nouveau/nouveau_hw.c

@@ -1017,8 +1017,9 @@ nv_load_state_ext(struct drm_device *dev, int head,
 
 	NVWriteCRTC(dev, head, NV_PCRTC_START, regp->fb_start);
 
-	/* Setting 1 on this value gives you interrupts for every vblank period. */
-	NVWriteCRTC(dev, head, NV_PCRTC_INTR_EN_0, 0);
+	/* Enable vblank interrupts. */
+	NVWriteCRTC(dev, head, NV_PCRTC_INTR_EN_0,
+		    (dev->vblank_enabled[head] ? 1 : 0));
 	NVWriteCRTC(dev, head, NV_PCRTC_INTR_0, NV_PCRTC_INTR_0_VBLANK);
 }
 

drivers/gpu/drm/nouveau/nouveau_irq.c

@@ -1200,11 +1200,15 @@ nv50_pgraph_irq_handler(struct drm_device *dev)
 static void
 nouveau_crtc_irq_handler(struct drm_device *dev, int crtc)
 {
-	if (crtc & 1)
+	if (crtc & 1) {
 		nv_wr32(dev, NV_CRTC0_INTSTAT, NV_CRTC_INTR_VBLANK);
+		drm_handle_vblank(dev, 0);
+	}
 
-	if (crtc & 2)
+	if (crtc & 2) {
 		nv_wr32(dev, NV_CRTC1_INTSTAT, NV_CRTC_INTR_VBLANK);
+		drm_handle_vblank(dev, 1);
+	}
 }
 
 irqreturn_t

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -669,13 +669,13 @@ nouveau_card_init(struct drm_device *dev)
 	if (ret)
 		goto out_fifo;
 
-	ret = nouveau_irq_init(dev);
+	ret = drm_vblank_init(dev, nv_two_heads(dev) ? 2 : 1);
 	if (ret)
-		goto out_display;
+		goto out_vblank;
 
-	ret = drm_vblank_init(dev, 0);
+	ret = nouveau_irq_init(dev);
 	if (ret)
-		goto out_irq;
+		goto out_vblank;
 
 	/* what about PVIDEO/PCRTC/PRAMDAC etc? */
 
@@ -701,7 +701,8 @@ nouveau_card_init(struct drm_device *dev)
 	nouveau_fence_fini(dev);
 out_irq:
 	nouveau_irq_fini(dev);
-out_display:
+out_vblank:
+	drm_vblank_cleanup(dev);
 	engine->display.destroy(dev);
 out_fifo:
 	if (!nouveau_noaccel)
@@ -772,6 +773,7 @@ static void nouveau_card_takedown(struct drm_device *dev)
 	nouveau_mem_vram_fini(dev);
 
 	nouveau_irq_fini(dev);
+	drm_vblank_cleanup(dev);
 
 	nouveau_pm_fini(dev);
 	nouveau_bios_takedown(dev);

drivers/gpu/drm/nouveau/nv50_display.c

@@ -428,31 +428,29 @@ static void
 nv50_display_vblank_crtc_handler(struct drm_device *dev, int crtc)
 {
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
-	struct nouveau_channel *chan;
-	struct list_head *entry, *tmp;
-
-	list_for_each_safe(entry, tmp, &dev_priv->vbl_waiting) {
-		chan = list_entry(entry, struct nouveau_channel, nvsw.vbl_wait);
+	struct nouveau_channel *chan, *tmp;
 
+	list_for_each_entry_safe(chan, tmp, &dev_priv->vbl_waiting,
+				 nvsw.vbl_wait) {
 		nouveau_bo_wr32(chan->notifier_bo, chan->nvsw.vblsem_offset,
 						chan->nvsw.vblsem_rval);
 		list_del(&chan->nvsw.vbl_wait);
+		drm_vblank_put(dev, crtc);
 	}
+
+	drm_handle_vblank(dev, crtc);
 }
 
 static void
 nv50_display_vblank_handler(struct drm_device *dev, uint32_t intr)
 {
-	intr &= NV50_PDISPLAY_INTR_1_VBLANK_CRTC;
-
 	if (intr & NV50_PDISPLAY_INTR_1_VBLANK_CRTC_0)
 		nv50_display_vblank_crtc_handler(dev, 0);
 
 	if (intr & NV50_PDISPLAY_INTR_1_VBLANK_CRTC_1)
 		nv50_display_vblank_crtc_handler(dev, 1);
 
-	nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, intr, 0x00000000);
-	nv_wr32(dev, NV50_PDISPLAY_INTR_1, intr);
+	nv_wr32(dev, NV50_PDISPLAY_INTR_1, NV50_PDISPLAY_INTR_1_VBLANK_CRTC);
 }
 
 static void

drivers/gpu/drm/nouveau/nv50_graph.c

@@ -384,14 +384,7 @@ nv50_graph_nvsw_vblsem_release(struct nouveau_channel *chan,
 	if (!chan->nvsw.vblsem || chan->nvsw.vblsem_offset == ~0 || data > 1)
 		return -EINVAL;
 
-	if (!(nv_rd32(dev, NV50_PDISPLAY_INTR_EN_1) &
-			   NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(data))) {
-		nv_wr32(dev, NV50_PDISPLAY_INTR_1,
-			     NV50_PDISPLAY_INTR_1_VBLANK_CRTC_(data));
-		nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, 0,
-			     NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(data));
-	}
-
+	drm_vblank_get(dev, data);
 	list_add(&chan->nvsw.vbl_wait, &dev_priv->vbl_waiting);
 	return 0;
 }