From: Magnus Damm <magnus.damm@gmail.com>
To: video4linux-list@redhat.com
Cc: v4l-dvb-maintainer@linuxtv.org, g.liakhovetski@gmx.de,
mchehab@infradead.org
Subject: [PATCH] video: improve sh_mobile_ceu buffer handling
Date: Wed, 15 Oct 2008 19:17:09 +0900 [thread overview]
Message-ID: <20081015101709.22905.30106.sendpatchset@rx1.opensource.se> (raw)
From: Magnus Damm <damm@igel.co.jp>
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.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Test-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
---
drivers/media/video/sh_mobile_ceu_camera.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
--- 0004/drivers/media/video/sh_mobile_ceu_camera.c
+++ work/drivers/media/video/sh_mobile_ceu_camera.c 2008-10-15 18:26:29.000000000 +0900
@@ -165,6 +165,7 @@ static void sh_mobile_ceu_capture(struct
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
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_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,
--
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reply other threads:[~2008-10-15 10:18 UTC|newest]
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