[media] soc-camera: Support user-configurable line stride

Add a capabilities field to the soc_camera_host structure to flag hosts
that support user-configurable line strides. soc_camera_try_fmt() then
passes the user-provided bytesperline and sizeimage format fields to
such hosts, and expects the host to check (and fix if needed) the
values.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[g.liakhovetski@gmx.de: fix a typo in mx2_camera.c]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index a87062c393b5..d865dcf9879f 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -56,11 +56,15 @@ struct soc_camera_device {
         };
 };
 
+/* Host supports programmable stride */
+#define SOCAM_HOST_CAP_STRIDE           (1 << 0)
+
 struct soc_camera_host {
         struct v4l2_device v4l2_dev;
         struct list_head list;
         struct mutex host_lock;         /* Protect during probing */
         unsigned char nr;               /* Host number */
+        u32 capabilities;
         void *priv;
         const char *drv_name;
         struct soc_camera_host_ops *ops;