[media] v4l2-subdev: replace v4l2_subdev_fh by v4l2_subdev_pad_config

If a subdevice pad op is called from a bridge driver, then there is
no v4l2_subdev_fh struct that can be passed to the subdevice. This
made it hard to use such subdevs from a bridge driver.

This patch replaces the v4l2_subdev_fh pointer by a v4l2_subdev_pad_config
pointer in the pad ops. This allows bridge drivers to use the various
try_ pad ops by creating a v4l2_subdev_pad_config struct and passing it
along to the pad op.

The v4l2_subdev_get_try_* macros had to be changed because of this, so
I also took the opportunity to use the full name of the v4l2_subdev_get_try_*
functions in the __V4L2_SUBDEV_MK_GET_TRY macro arguments: if you now do
'git grep v4l2_subdev_get_try_format' you will actually find the header
where it is defined.

One remark regarding the drivers/staging/media/davinci_vpfe patches: the
*_init_formats() functions assumed that fh could be NULL. However, that's
not true for this driver, it's always set. This is almost certainly a copy
and paste from the omap3isp driver. I've updated the code to reflect the
fact that fh is never NULL.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Tested-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 21 insertions, 21 deletions

diff --git a/drivers/staging/media/omap4iss/iss_ipipe.c b/drivers/staging/media/omap4iss/iss_ipipe.c
index a1a46ef8319b..fc319822a33e 100644
--- a/drivers/staging/media/omap4iss/iss_ipipe.c
+++ b/drivers/staging/media/omap4iss/iss_ipipe.c
@@ -24,7 +24,7 @@
 #include "iss_ipipe.h"
 
 static struct v4l2_mbus_framefmt *
-__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg,
 		  unsigned int pad, enum v4l2_subdev_format_whence which);
 
 static const unsigned int ipipe_fmts[] = {
@@ -176,11 +176,11 @@ static int ipipe_set_stream(struct v4l2_subdev *sd, int enable)
 }
 
 static struct v4l2_mbus_framefmt *
-__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg,
 		  unsigned int pad, enum v4l2_subdev_format_whence which)
 {
 	if (which == V4L2_SUBDEV_FORMAT_TRY)
-		return v4l2_subdev_get_try_format(fh, pad);
+		return v4l2_subdev_get_try_format(&ipipe->subdev, cfg, pad);
 
 	return &ipipe->formats[pad];
 }
@@ -188,12 +188,12 @@ __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
 /*
  * ipipe_try_format - Try video format on a pad
  * @ipipe: ISS IPIPE device
- * @fh : V4L2 subdev file handle
+ * @cfg: V4L2 subdev pad config
  * @pad: Pad number
  * @fmt: Format
  */
 static void
-ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg,
 		unsigned int pad, struct v4l2_mbus_framefmt *fmt,
 		enum v4l2_subdev_format_whence which)
 {
@@ -220,7 +220,7 @@ ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
 		break;
 
 	case IPIPE_PAD_SOURCE_VP:
-		format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SINK, which);
+		format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SINK, which);
 		memcpy(fmt, format, sizeof(*fmt));
 
 		fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
@@ -236,12 +236,12 @@ ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
 /*
  * ipipe_enum_mbus_code - Handle pixel format enumeration
  * @sd     : pointer to v4l2 subdev structure
- * @fh : V4L2 subdev file handle
+ * @cfg    : V4L2 subdev pad config
  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
  * return -EINVAL or zero on success
  */
 static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,
-			       struct v4l2_subdev_fh *fh,
+			       struct v4l2_subdev_pad_config *cfg,
 			       struct v4l2_subdev_mbus_code_enum *code)
 {
 	switch (code->pad) {
@@ -268,7 +268,7 @@ static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,
 }
 
 static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
-				struct v4l2_subdev_fh *fh,
+				struct v4l2_subdev_pad_config *cfg,
 				struct v4l2_subdev_frame_size_enum *fse)
 {
 	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
@@ -280,7 +280,7 @@ static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
 	format.code = fse->code;
 	format.width = 1;
 	format.height = 1;
-	ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+	ipipe_try_format(ipipe, cfg, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
 	fse->min_width = format.width;
 	fse->min_height = format.height;
 
@@ -290,7 +290,7 @@ static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
 	format.code = fse->code;
 	format.width = -1;
 	format.height = -1;
-	ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+	ipipe_try_format(ipipe, cfg, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
 	fse->max_width = format.width;
 	fse->max_height = format.height;
 
@@ -300,19 +300,19 @@ static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
 /*
  * ipipe_get_format - Retrieve the video format on a pad
  * @sd : ISP IPIPE V4L2 subdevice
- * @fh : V4L2 subdev file handle
+ * @cfg: V4L2 subdev pad config
  * @fmt: Format
  *
  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
  * to the format type.
  */
-static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 			   struct v4l2_subdev_format *fmt)
 {
 	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
 	struct v4l2_mbus_framefmt *format;
 
-	format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
+	format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which);
 	if (format == NULL)
 		return -EINVAL;
 
@@ -323,31 +323,31 @@ static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
 /*
  * ipipe_set_format - Set the video format on a pad
  * @sd : ISP IPIPE V4L2 subdevice
- * @fh : V4L2 subdev file handle
+ * @cfg: V4L2 subdev pad config
  * @fmt: Format
  *
  * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
  * to the format type.
  */
-static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 			   struct v4l2_subdev_format *fmt)
 {
 	struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
 	struct v4l2_mbus_framefmt *format;
 
-	format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
+	format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which);
 	if (format == NULL)
 		return -EINVAL;
 
-	ipipe_try_format(ipipe, fh, fmt->pad, &fmt->format, fmt->which);
+	ipipe_try_format(ipipe, cfg, fmt->pad, &fmt->format, fmt->which);
 	*format = fmt->format;
 
 	/* Propagate the format from sink to source */
 	if (fmt->pad == IPIPE_PAD_SINK) {
-		format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SOURCE_VP,
+		format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP,
 					   fmt->which);
 		*format = fmt->format;
-		ipipe_try_format(ipipe, fh, IPIPE_PAD_SOURCE_VP, format,
+		ipipe_try_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP, format,
 				fmt->which);
 	}
 
@@ -388,7 +388,7 @@ static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 	format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
 	format.format.width = 4096;
 	format.format.height = 4096;
-	ipipe_set_format(sd, fh, &format);
+	ipipe_set_format(sd, fh ? fh->pad : NULL, &format);
 
 	return 0;
 }