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Commit fa8bbe0a authored by Songjun Wu's avatar Songjun Wu Committed by Mauro Carvalho Chehab
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[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: default avatarSongjun Wu <songjun.wu@microchip.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 37e90a22

drivers/media/platform/atmel/atmel-isc.c

+7 −1
Original line number Diff line number Diff line
@@ -617,6 +617,12 @@ static void isc_buffer_queue(struct vb2_buffer *vb) 
	unsigned long flags;



	spin_lock_irqsave(&isc->dma_queue_lock, flags);

	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);

}