From 7c6b73197062180d51e9871982b083a651838992 Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Tue, 27 Jul 2010 09:06:10 -0300 Subject: [PATCH] V4L/DVB: mx2_camera: implement forced termination of active buffer for mx25 This allows userspace to terminate a capture without waiting for the current frame to complete. Signed-off-by: Baruch Siach Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/mx2_camera.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c index 2560e77..d7b3229 100644 --- a/drivers/media/video/mx2_camera.c +++ b/drivers/media/video/mx2_camera.c @@ -640,15 +640,27 @@ static void mx2_videobuf_release(struct videobuf_queue *vq, * Terminate only queued but inactive buffers. Active buffers are * released when they become inactive after videobuf_waiton(). * - * FIXME: implement forced termination of active buffers, so that the - * user won't get stuck in an uninterruptible state. This requires a - * specific handling for each of the three DMA types that this driver - * supports. + * FIXME: implement forced termination of active buffers for mx27 and + * mx27 eMMA, so that the user won't get stuck in an uninterruptible + * state. This requires a specific handling for each of the these DMA + * types. */ spin_lock_irqsave(&pcdev->lock, flags); if (vb->state == VIDEOBUF_QUEUED) { list_del(&vb->queue); vb->state = VIDEOBUF_ERROR; + } else if (cpu_is_mx25() && vb->state == VIDEOBUF_ACTIVE) { + if (pcdev->fb1_active == buf) { + pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN; + writel(0, pcdev->base_csi + CSIDMASA_FB1); + pcdev->fb1_active = NULL; + } else if (pcdev->fb2_active == buf) { + pcdev->csicr1 &= ~CSICR1_FB2_DMA_INTEN; + writel(0, pcdev->base_csi + CSIDMASA_FB2); + pcdev->fb2_active = NULL; + } + writel(pcdev->csicr1, pcdev->base_csi + CSICR1); + vb->state = VIDEOBUF_ERROR; } spin_unlock_irqrestore(&pcdev->lock, flags); -- 2.7.4