drm/omap: add framedone interrupt support

This prepares framedone interrupt handling for
manual display update support.

Acked-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 86827a061b0b..5b6a18a62bbb 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -51,6 +51,9 @@ struct omap_crtc {
 	bool pending;
 	wait_queue_head_t pending_wait;
 	struct drm_pending_vblank_event *event;
+
+	void (*framedone_handler)(void *);
+	void *framedone_handler_data;
 };
 
 /* -----------------------------------------------------------------------------
@@ -230,6 +233,18 @@ static int omap_crtc_dss_register_framedone(
 		struct omap_drm_private *priv, enum omap_channel channel,
 		void (*handler)(void *), void *data)
 {
+	struct drm_crtc *crtc = priv->channels[channel]->crtc;
+	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+	struct drm_device *dev = omap_crtc->base.dev;
+
+	if (omap_crtc->framedone_handler)
+		return -EBUSY;
+
+	dev_dbg(dev->dev, "register framedone %s", omap_crtc->name);
+
+	omap_crtc->framedone_handler = handler;
+	omap_crtc->framedone_handler_data = data;
+
 	return 0;
 }
 
@@ -237,6 +252,17 @@ static void omap_crtc_dss_unregister_framedone(
 		struct omap_drm_private *priv, enum omap_channel channel,
 		void (*handler)(void *), void *data)
 {
+	struct drm_crtc *crtc = priv->channels[channel]->crtc;
+	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+	struct drm_device *dev = omap_crtc->base.dev;
+
+	dev_dbg(dev->dev, "unregister framedone %s", omap_crtc->name);
+
+	WARN_ON(omap_crtc->framedone_handler != handler);
+	WARN_ON(omap_crtc->framedone_handler_data != data);
+
+	omap_crtc->framedone_handler = NULL;
+	omap_crtc->framedone_handler_data = NULL;
 }
 
 static const struct dss_mgr_ops mgr_ops = {
@@ -302,6 +328,28 @@ void omap_crtc_vblank_irq(struct drm_crtc *crtc)
 	DBG("%s: apply done", omap_crtc->name);
 }
 
+void omap_crtc_framedone_irq(struct drm_crtc *crtc, uint32_t irqstatus)
+{
+	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+
+	if (!omap_crtc->framedone_handler)
+		return;
+
+	omap_crtc->framedone_handler(omap_crtc->framedone_handler_data);
+
+	spin_lock(&crtc->dev->event_lock);
+	/* Send the vblank event if one has been requested. */
+	if (omap_crtc->event) {
+		drm_crtc_send_vblank_event(crtc, omap_crtc->event);
+		omap_crtc->event = NULL;
+	}
+	omap_crtc->pending = false;
+	spin_unlock(&crtc->dev->event_lock);
+
+	/* Wake up omap_atomic_complete. */
+	wake_up(&omap_crtc->pending_wait);
+}
+
 static void omap_crtc_write_crtc_properties(struct drm_crtc *crtc)
 {
 	struct omap_drm_private *priv = crtc->dev->dev_private;