drm/armada: convert overlay plane vbl worker to a armada plane worker

Convert the overlay plane to use the generic armada plane worker
infrastructure which is shared with the primary plane.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/gpu/drm/armada/armada_crtc.c

@@ -226,44 +226,15 @@ int armada_drm_plane_work_wait(struct armada_plane *plane, long timeout)
 	return wait_event_timeout(plane->frame_wait, !plane->work, timeout);
 }
 
-void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
-	struct armada_vbl_event *evt)
+struct armada_plane_work *armada_drm_plane_work_cancel(
+	struct armada_crtc *dcrtc, struct armada_plane *plane)
 {
-	unsigned long flags;
-	bool not_on_list;
-
-	WARN_ON(drm_vblank_get(dcrtc->crtc.dev, dcrtc->num));
-
-	spin_lock_irqsave(&dcrtc->irq_lock, flags);
-	not_on_list = list_empty(&evt->node);
-	if (not_on_list)
-		list_add_tail(&evt->node, &dcrtc->vbl_list);
-	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
+	struct armada_plane_work *work = xchg(&plane->work, NULL);
 
-	if (!not_on_list)
+	if (work)
 		drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
-}
 
-void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
-	struct armada_vbl_event *evt)
-{
-	spin_lock_irq(&dcrtc->irq_lock);
-	if (!list_empty(&evt->node)) {
-		list_del_init(&evt->node);
-		drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
-	}
-	spin_unlock_irq(&dcrtc->irq_lock);
-}
-
-static void armada_drm_vbl_event_run(struct armada_crtc *dcrtc)
-{
-	struct armada_vbl_event *e, *n;
-
-	list_for_each_entry_safe(e, n, &dcrtc->vbl_list, node) {
-		list_del_init(&e->node);
-		drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
-		e->fn(dcrtc, e->data);
-	}
+	return work;
 }
 
 static int armada_drm_crtc_queue_frame_work(struct armada_crtc *dcrtc,
@@ -429,6 +400,7 @@ static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 {
 	void __iomem *base = dcrtc->base;
+	struct drm_plane *ovl_plane;
 
 	if (stat & DMA_FF_UNDERFLOW)
 		DRM_ERROR("video underflow on crtc %u\n", dcrtc->num);
@@ -439,7 +411,12 @@ static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 		drm_handle_vblank(dcrtc->crtc.dev, dcrtc->num);
 
 	spin_lock(&dcrtc->irq_lock);
-	armada_drm_vbl_event_run(dcrtc);
+	ovl_plane = dcrtc->plane;
+	if (ovl_plane) {
+		struct armada_plane *plane = drm_to_armada_plane(ovl_plane);
+		armada_drm_plane_work_run(dcrtc, plane);
+		wake_up(&plane->frame_wait);
+	}
 
 	if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) {
 		int i = stat & GRA_FRAME_IRQ0 ? 0 : 1;
@@ -1188,7 +1165,6 @@ static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
 	dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24;
 	spin_lock_init(&dcrtc->irq_lock);
 	dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR;
-	INIT_LIST_HEAD(&dcrtc->vbl_list);
 
 	/* Initialize some registers which we don't otherwise set */
 	writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV);

drivers/gpu/drm/armada/armada_crtc.h

@@ -52,6 +52,8 @@ int armada_drm_plane_init(struct armada_plane *plane);
 int armada_drm_plane_work_queue(struct armada_crtc *dcrtc,
 	struct armada_plane *plane, struct armada_plane_work *work);
 int armada_drm_plane_work_wait(struct armada_plane *plane, long timeout);
+struct armada_plane_work *armada_drm_plane_work_cancel(
+	struct armada_crtc *dcrtc, struct armada_plane *plane);
 
 struct armada_crtc {
 	struct drm_crtc		crtc;
@@ -87,27 +89,9 @@ struct armada_crtc {
 
 	spinlock_t		irq_lock;
 	uint32_t		irq_ena;
-	struct list_head	vbl_list;
 };
 #define drm_to_armada_crtc(c) container_of(c, struct armada_crtc, crtc)
 
-struct armada_vbl_event {
-	struct list_head	node;
-	void			*data;
-	void			(*fn)(struct armada_crtc *, void *);
-};
-
-void armada_drm_vbl_event_add(struct armada_crtc *,
-	struct armada_vbl_event *);
-void armada_drm_vbl_event_remove(struct armada_crtc *,
-	struct armada_vbl_event *);
-#define armada_drm_vbl_event_init(_e, _f, _d) do {	\
-	struct armada_vbl_event *__e = _e;		\
-	INIT_LIST_HEAD(&__e->node);			\
-	__e->data = _d;					\
-	__e->fn = _f;					\
-} while (0)
-
 void armada_drm_crtc_gamma_set(struct drm_crtc *, u16, u16, u16, int);
 void armada_drm_crtc_gamma_get(struct drm_crtc *, u16 *, u16 *, u16 *, int);
 void armada_drm_crtc_disable_irq(struct armada_crtc *, u32);

drivers/gpu/drm/armada/armada_overlay.c

@@ -37,7 +37,7 @@ struct armada_ovl_plane {
 	uint32_t dst_yx;
 	uint32_t ctrl0;
 	struct {
-		struct armada_vbl_event update;
+		struct armada_plane_work work;
 		struct armada_regs regs[13];
 	} vbl;
 	struct armada_ovl_plane_properties prop;
@@ -82,14 +82,13 @@ static void armada_ovl_retire_fb(struct armada_ovl_plane *dplane,
 }
 
 /* === Plane support === */
-static void armada_ovl_plane_vbl(struct armada_crtc *dcrtc, void *data)
+static void armada_ovl_plane_work(struct armada_crtc *dcrtc,
+	struct armada_plane *plane, struct armada_plane_work *work)
 {
-	struct armada_ovl_plane *dplane = data;
+	struct armada_ovl_plane *dplane = container_of(plane, struct armada_ovl_plane, base);
 
 	armada_drm_crtc_update_regs(dcrtc, dplane->vbl.regs);
 	armada_ovl_retire_fb(dplane, NULL);
-
-	wake_up(&dplane->base.frame_wait);
 }
 
 static int
@@ -162,9 +161,8 @@ armada_ovl_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 			       dcrtc->base + LCD_SPU_SRAM_PARA1);
 	}
 
-	wait_event_timeout(dplane->base.frame_wait,
-			   list_empty(&dplane->vbl.update.node),
-			   HZ/25);
+	if (armada_drm_plane_work_wait(&dplane->base, HZ / 25) == 0)
+		armada_drm_plane_work_cancel(dcrtc, &dplane->base);
 
 	if (plane->fb != fb) {
 		struct armada_gem_object *obj = drm_fb_obj(fb);
@@ -255,7 +253,8 @@ armada_ovl_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 	}
 	if (idx) {
 		armada_reg_queue_end(dplane->vbl.regs, idx);
-		armada_drm_vbl_event_add(dcrtc, &dplane->vbl.update);
+		armada_drm_plane_work_queue(dcrtc, &dplane->base,
+					    &dplane->vbl.work);
 	}
 	return 0;
 }
@@ -270,14 +269,13 @@ static int armada_ovl_plane_disable(struct drm_plane *plane)
 		return 0;
 
 	dcrtc = drm_to_armada_crtc(dplane->base.base.crtc);
-	dcrtc->plane = NULL;
 
-	armada_drm_vbl_event_remove(dcrtc, &dplane->vbl.update);
+	armada_drm_plane_work_cancel(dcrtc, &dplane->base);
+	armada_drm_crtc_plane_disable(dcrtc, plane);
 
+	dcrtc->plane = NULL;
 	dplane->ctrl0 = 0;
 
-	armada_drm_crtc_plane_disable(dcrtc, plane);
-
 	fb = xchg(&dplane->old_fb, NULL);
 	if (fb)
 		drm_framebuffer_unreference(fb);
@@ -456,8 +454,7 @@ int armada_overlay_plane_create(struct drm_device *dev, unsigned long crtcs)
 		return ret;
 	}
 
-	armada_drm_vbl_event_init(&dplane->vbl.update, armada_ovl_plane_vbl,
-				  dplane);
+	dplane->vbl.work.fn = armada_ovl_plane_work;
 
 	ret = drm_universal_plane_init(dev, &dplane->base.base, crtcs,
 				       &armada_ovl_plane_funcs,