From: Anatolij Gustschin Date: Fri, 24 Aug 2012 14:36:11 +0000 (-0300) Subject: [media] V4L: soc_camera: allow reading from video device if supported X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1438be56ade16653584f70a2e2a1c11197291271;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [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: Anatolij Gustschin Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index 6f76ada1b2d8..4e3735679f17 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -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)