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Commit 1438be56 authored by Anatolij Gustschin's avatar Anatolij Gustschin Committed by Mauro Carvalho Chehab
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[media] V4L: soc_camera: allow reading from video device if supported 



Try reading on video device. If the camera bus driver supports reading
we can try it and return the result. Also add a debug line.

Signed-off-by: default avatarAnatolij Gustschin <agust@denx.de>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 0dc2d849

drivers/media/platform/soc_camera/soc_camera.c

+8 −2
Original line number Diff line number Diff line
@@ -645,11 +645,17 @@ static ssize_t soc_camera_read(struct file *file, char __user *buf, 
			       size_t count, loff_t *ppos)

{

	struct soc_camera_device *icd = file->private_data;

	int err = -EINVAL;

	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);



	dev_dbg(icd->pdev, "read called, buf %p\n", buf);



	if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ)

		return vb2_read(&icd->vb2_vidq, buf, count, ppos,

				file->f_flags & O_NONBLOCK);



	dev_err(icd->pdev, "camera device read not implemented\n");



	return err;

	return -EINVAL;

}



static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)