V4L/DVB: pxa_camera: move fifo reset direct before dma start
Move the fifo reset from pxa_camera_start_capture to pxa_camera_irq direct
before the dma start after an end of frame interrupt to prevent images from
shifting because of old data at the begin of the frame.
Signed-off-by: Stefan Herbrechtsmeier <hbmeier@hni.uni-paderborn.de>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Tested-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c
index 5ecc30d..04bf5c1 100644
--- a/drivers/media/video/pxa_camera.c
+++ b/drivers/media/video/pxa_camera.c
@@ -609,12 +609,9 @@
*/
static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
{
- unsigned long cicr0, cifr;
+ unsigned long cicr0;
dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__);
- /* Reset the FIFOs */
- cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
- __raw_writel(cifr, pcdev->base + CIFR);
/* Enable End-Of-Frame Interrupt */
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
cicr0 &= ~CICR0_EOFM;
@@ -935,7 +932,7 @@
static irqreturn_t pxa_camera_irq(int irq, void *data)
{
struct pxa_camera_dev *pcdev = data;
- unsigned long status, cicr0;
+ unsigned long status, cifr, cicr0;
struct pxa_buffer *buf;
struct videobuf_buffer *vb;
@@ -949,6 +946,10 @@
__raw_writel(status, pcdev->base + CISR);
if (status & CISR_EOF) {
+ /* Reset the FIFOs */
+ cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
+ __raw_writel(cifr, pcdev->base + CIFR);
+
pcdev->active = list_first_entry(&pcdev->capture,
struct pxa_buffer, vb.queue);
vb = &pcdev->active->vb;