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| author | Songjun Wu <songjun.wu@microchip.com> | 2016-09-28 08:28:57 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-10-24 23:22:46 +0300 |
| commit | fa8bbe0a8567bf4eb87e82739465360a6797c91b (patch) | |
| tree | ae0010f24a95c00630229f7035af29e7112f22e6 | |
| parent | 37e90a220abc4c5dee1fc42382cbca595a0e95bd (diff) | |
| download | linux-fa8bbe0a8567bf4eb87e82739465360a6797c91b.tar.xz | |
[media] atmel-isc: start dma in some scenario
If a new vb buf is added to vb queue, the queue is
empty and steaming, dma should be started.
Signed-off-by: Songjun Wu <songjun.wu@microchip.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
| -rw-r--r-- | drivers/media/platform/atmel/atmel-isc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c index ccfe13b7d3f8..8e25d3f56438 100644 --- a/drivers/media/platform/atmel/atmel-isc.c +++ b/drivers/media/platform/atmel/atmel-isc.c @@ -617,7 +617,13 @@ static void isc_buffer_queue(struct vb2_buffer *vb) unsigned long flags; spin_lock_irqsave(&isc->dma_queue_lock, flags); - list_add_tail(&buf->list, &isc->dma_queue); + if (!isc->cur_frm && list_empty(&isc->dma_queue) && + vb2_is_streaming(vb->vb2_queue)) { + isc->cur_frm = buf; + isc_start_dma(isc->regmap, isc->cur_frm, + isc->current_fmt->reg_dctrl_dview); + } else + list_add_tail(&buf->list, &isc->dma_queue); spin_unlock_irqrestore(&isc->dma_queue_lock, flags); } |