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[media] v4l: omap4iss: resizer: Stop the whole resizer to avoid FIFO overflows

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When stopping the resizer due to a buffer underrun, disabling RZA only
produces input FIFO overflows, most probably when the next frame is
received. Disable the whole resizer to work around the problem.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Laurent Pinchart 2013-09-04 09:48:20 -03:00 • committed by Mauro Carvalho Chehab
parent 97059524ba
commit 82043ff6af
1 changed files with 5 additions and 3 deletions
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8
drivers/staging/media/omap4iss/iss_resizer.c
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@ -266,10 +266,12 @@ static void resizer_configure(struct iss_resizer_device *resizer)
static void resizer_isr_buffer(struct iss_resizer_device *resizer) static void resizer_isr_buffer(struct iss_resizer_device *resizer)
{ {
struct iss_device *iss = to_iss_device(resizer);
struct iss_buffer *buffer; struct iss_buffer *buffer;
iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_EN, RSZ_EN_EN); /* The whole resizer needs to be stopped. Disabling RZA only produces
* input FIFO overflows, most probably when the next frame is received.
*/
resizer_enable(resizer, 0);
buffer = omap4iss_video_buffer_next(&resizer->video_out); buffer = omap4iss_video_buffer_next(&resizer->video_out);
if (buffer == NULL) if (buffer == NULL)
@ -277,7 +279,7 @@ static void resizer_isr_buffer(struct iss_resizer_device *resizer)
resizer_set_outaddr(resizer, buffer->iss_addr); resizer_set_outaddr(resizer, buffer->iss_addr);
iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_EN, RSZ_EN_EN); resizer_enable(resizer, 1);
} }
/* /*