media: stm32: dcmipp: bytecap: clear all interrupts upon stream stop

Ensure that there are no pending interrupts after we have stopped the
pipeline. Indeed, it could happen that new interrupt has been generated
during the stop_streaming processing hence clear them in order to avoid
getting a new interrupt right from the start of a next start_streaming.

Fixes: 28e0f3772296 ("media: stm32-dcmipp: STM32 DCMIPP camera interface driver")
Cc: stable@vger.kernel.org
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c
index 1c1b6b48918ee26f245d4cf99086473c44e74123..b18e273ef4a3e6e8339f5d4d2c01899594e46d5b 100644 (file)
--- a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c
@@ -512,6 +512,9 @@ static void dcmipp_bytecap_stop_streaming(struct vb2_queue *vq)
        /* Disable pipe */
        reg_clear(vcap, DCMIPP_P0FSCR, DCMIPP_P0FSCR_PIPEN);
 
+       /* Clear any pending interrupts */
+       reg_write(vcap, DCMIPP_CMFCR, DCMIPP_CMIER_P0ALL);
+
        spin_lock_irq(&vcap->irqlock);
 
        /* Return all queued buffers to vb2 in ERROR state */