media: stm32-dcmi: only enable IT frame on JPEG capture

Only enable IT frame on JPEG capture, this saves some CPU
interruptions and processing on all the other cases.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index ba3e2ee..d6b00ed 100644 (file)
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -659,7 +659,10 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count)
        }
 
        /* Enable interruptions */
-       reg_set(dcmi->regs, DCMI_IER, IT_FRAME | IT_OVR | IT_ERR);
+       if (dcmi->sd_format->fourcc == V4L2_PIX_FMT_JPEG)
+               reg_set(dcmi->regs, DCMI_IER, IT_FRAME | IT_OVR | IT_ERR);
+       else
+               reg_set(dcmi->regs, DCMI_IER, IT_OVR | IT_ERR);
 
        return 0;