From 51354cc3e0c233803505ac8842c3683f42ff42bb Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Thu, 16 Oct 2008 19:51:20 -0300 Subject: [PATCH] V4L/DVB (9244): video: improve sh_mobile_ceu buffer handling This patch improves the buffer handling in the sh_mobile_ceu driver. Instead of marking all queued buffers as VIDEOBUF_ACTIVE the code now marks queued-but-not-active buffers as VIDEOBUF_QUEUED and buffers involved in dma as VIDEOBUF_ACTIVE. The code is also updated with code to cancel active buffers, thanks to Morimoto-san. Tested-by: Kuninori Morimoto Signed-off-by: Magnus Damm Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/sh_mobile_ceu_camera.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c index fa88d38..2407607 100644 --- a/drivers/media/video/sh_mobile_ceu_camera.c +++ b/drivers/media/video/sh_mobile_ceu_camera.c @@ -165,6 +165,7 @@ static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10); if (pcdev->active) { + pcdev->active->state = VIDEOBUF_ACTIVE; ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active)); ceu_write(pcdev, CAPSR, 0x1); /* start capture */ } @@ -236,7 +237,7 @@ static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, vb, vb->baddr, vb->bsize); - vb->state = VIDEOBUF_ACTIVE; + vb->state = VIDEOBUF_QUEUED; spin_lock_irqsave(&pcdev->lock, flags); list_add_tail(&vb->queue, &pcdev->capture); @@ -323,12 +324,24 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; + unsigned long flags; BUG_ON(icd != pcdev->icd); /* disable capture, disable interrupts */ ceu_write(pcdev, CEIER, 0); ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ + + /* make sure active buffer is canceled */ + spin_lock_irqsave(&pcdev->lock, flags); + if (pcdev->active) { + list_del(&pcdev->active->queue); + pcdev->active->state = VIDEOBUF_ERROR; + wake_up_all(&pcdev->active->done); + pcdev->active = NULL; + } + spin_unlock_irqrestore(&pcdev->lock, flags); + icd->ops->release(icd); dev_info(&icd->dev, -- 2.7.4