[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>
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
index b631687..ecd83fa 100644
--- a/drivers/media/video/mx2_camera.c
+++ b/drivers/media/video/mx2_camera.c
@@ -1787,6 +1787,8 @@
pcdev->soc_host.priv = pcdev;
pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
pcdev->soc_host.nr = pdev->id;
+ if (cpu_is_mx25())
+ pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(pcdev->alloc_ctx)) {
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c
index 5e3274e..cfac535 100644
--- a/drivers/media/video/soc_camera.c
+++ b/drivers/media/video/soc_camera.c
@@ -171,8 +171,10 @@
dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n",
pixfmtstr(pix->pixelformat), pix->width, pix->height);
- pix->bytesperline = 0;
- pix->sizeimage = 0;
+ if (!(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) {
+ pix->bytesperline = 0;
+ pix->sizeimage = 0;
+ }
ret = ici->ops->try_fmt(icd, f);
if (ret < 0)
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index a87062c..d865dcf 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -56,11 +56,15 @@
};
};
+/* 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;