drm: omapdrm: Handle CRTC error IRQs directly

Instead of going through a complicated registration mechanism, just
expose the CRTC error IRQ function and call it directly from the main
IRQ handler.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/omap_crtc.c

@@ -37,7 +37,6 @@ struct omap_crtc {
 	struct videomode vm;
 
 	struct omap_drm_irq vblank_irq;
-	struct omap_drm_irq error_irq;
 
 	bool ignore_digit_sync_lost;
 
@@ -275,10 +274,9 @@ static void omap_crtc_complete_page_flip(struct drm_crtc *crtc)
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 }
 
-static void omap_crtc_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
+void omap_crtc_error_irq(struct drm_crtc *crtc, uint32_t irqstatus)
 {
-	struct omap_crtc *omap_crtc =
-			container_of(irq, struct omap_crtc, error_irq);
+	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 
 	if (omap_crtc->ignore_digit_sync_lost) {
 		irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT;
@@ -325,7 +323,6 @@ static void omap_crtc_destroy(struct drm_crtc *crtc)
 	DBG("%s", omap_crtc->name);
 
 	WARN_ON(omap_crtc->vblank_irq.registered);
-	omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
 
 	drm_crtc_cleanup(crtc);
 
@@ -549,11 +546,6 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 	omap_crtc->vblank_irq.irqmask = pipe2vbl(crtc);
 	omap_crtc->vblank_irq.irq = omap_crtc_vblank_irq;
 
-	omap_crtc->error_irq.irqmask =
-			dispc_mgr_get_sync_lost_irq(channel);
-	omap_crtc->error_irq.irq = omap_crtc_error_irq;
-	omap_irq_register(dev, &omap_crtc->error_irq);
-
 	ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
 					&omap_crtc_funcs, NULL);
 	if (ret < 0) {

drivers/gpu/drm/omapdrm/omap_drv.h

@@ -155,6 +155,7 @@ void omap_crtc_pre_uninit(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id);
 int omap_crtc_wait_pending(struct drm_crtc *crtc);
+void omap_crtc_error_irq(struct drm_crtc *crtc, uint32_t irqstatus);
 
 struct drm_plane *omap_plane_init(struct drm_device *dev,
 		int id, enum drm_plane_type type,

drivers/gpu/drm/omapdrm/omap_irq.c

@@ -241,9 +241,13 @@ static irqreturn_t omap_irq_handler(int irq, void *arg)
 
 	for (id = 0; id < priv->num_crtcs; id++) {
 		struct drm_crtc *crtc = priv->crtcs[id];
+		enum omap_channel channel = omap_crtc_channel(crtc);
 
 		if (irqstatus & pipe2vbl(crtc))
 			drm_handle_vblank(dev, id);
+
+		if (irqstatus & dispc_mgr_get_sync_lost_irq(channel))
+			omap_crtc_error_irq(crtc, irqstatus);
 	}
 
 	omap_irq_fifo_underflow(priv, irqstatus);
@@ -279,6 +283,7 @@ int omap_drm_irq_install(struct drm_device *dev)
 {
 	struct omap_drm_private *priv = dev->dev_private;
 	struct omap_drm_irq *error_handler = &priv->error_handler;
+	unsigned int num_mgrs = dss_feat_get_num_mgrs();
 	unsigned int max_planes;
 	unsigned int i;
 	int ret;
@@ -294,6 +299,9 @@ int omap_drm_irq_install(struct drm_device *dev)
 			priv->irq_mask |= omap_underflow_irqs[i];
 	}
 
+	for (i = 0; i < num_mgrs; ++i)
+		priv->irq_mask |= dispc_mgr_get_sync_lost_irq(i);
+
 	dispc_runtime_get();
 	dispc_clear_irqstatus(0xffffffff);
 	dispc_runtime_put();