[media] omap3isp: ccdc: Don't timeout on stream off when the CCDC is stopped

When the CCDC is already stopped due to a buffer underrun, the stop
state machine won't advance in BT.656 mode as no interrupt are generated
by the stopped CCDC in that mode. Handle this case explicitly in the
ccdc_disable() function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Enrico Butera <ebutera@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/omap3isp/ispccdc.c

@@ -1320,6 +1320,8 @@ static void __ccdc_enable(struct isp_ccdc_device *ccdc, int enable)
 
 	isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_PCR,
 			ISPCCDC_PCR_EN, enable ? ISPCCDC_PCR_EN : 0);
+
+	ccdc->running = enable;
 }
 
 static int ccdc_disable(struct isp_ccdc_device *ccdc)
@@ -1330,6 +1332,8 @@ static int ccdc_disable(struct isp_ccdc_device *ccdc)
 	spin_lock_irqsave(&ccdc->lock, flags);
 	if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS)
 		ccdc->stopping = CCDC_STOP_REQUEST;
+	if (!ccdc->running)
+		ccdc->stopping = CCDC_STOP_FINISHED;
 	spin_unlock_irqrestore(&ccdc->lock, flags);
 
 	ret = wait_event_timeout(ccdc->wait,

drivers/media/platform/omap3isp/ispccdc.h

@@ -124,6 +124,7 @@ struct ispccdc_lsc {
  * @lock: Serializes shadow_update with interrupt handler
  * @wait: Wait queue used to stop the module
  * @stopping: Stopping state
+ * @running: Is the CCDC hardware running
  * @ioctl_lock: Serializes ioctl calls and LSC requests freeing
  */
 struct isp_ccdc_device {
@@ -155,6 +156,7 @@ struct isp_ccdc_device {
 	spinlock_t lock;
 	wait_queue_head_t wait;
 	unsigned int stopping;
+	bool running;
 	struct mutex ioctl_lock;
 };