diff mbox series

[v2] media: uvcvideo: Remove duplicated cap/out code

Message ID 20241129-uvc-dup-cap-out-v2-1-596cb9bdd5e8@chromium.org (mailing list archive)
State New
Headers show
Series [v2] media: uvcvideo: Remove duplicated cap/out code | expand

Commit Message

Ricardo Ribalda Nov. 29, 2024, 7:28 p.m. UTC 
The *_vid_cap and *_vid_out helpers seem to be identical:
- Remove all the cap/out duplicated code.
- Remove s/g_parm helpers
- Reorder uvc_ioctl_ops

And now that we are at it, fix a comment for uvc_acquire_privileges()

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
Unless I miss something, cap and out helpers are identical. So there is
no need to duplicate code
---
Changes in v2:
- Add missing acquire_privileges.
- Also remove helper for s/g_parm.
- Reorder callbacks.
- Link to v1: https://lore.kernel.org/r/20241127-uvc-dup-cap-out-v1-1-1bdcad2dabb0@chromium.org
---
 drivers/media/usb/uvc/uvc_v4l2.c | 162 +++++++++++----------------------------
 1 file changed, 43 insertions(+), 119 deletions(-)


---
base-commit: 72ad4ff638047bbbdf3232178fea4bec1f429319
change-id: 20241127-uvc-dup-cap-out-6a03c01e30a3

Best regards,
diff mbox series

Patch

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 97c5407f6603..42f0f8a89865 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -26,6 +26,8 @@ 
 
 #include "uvcvideo.h"
 
+static int uvc_acquire_privileges(struct uvc_fh *handle);
+
 static int uvc_control_add_xu_mapping(struct uvc_video_chain *chain,
 				      struct uvc_control_mapping *map,
 				      const struct uvc_xu_control_mapping *xmap)
@@ -361,9 +363,11 @@  static int uvc_v4l2_try_format(struct uvc_streaming *stream,
 	return ret;
 }
 
-static int uvc_v4l2_get_format(struct uvc_streaming *stream,
-	struct v4l2_format *fmt)
+static int uvc_ioctl_g_fmt(struct file *file, void *fh,
+			   struct v4l2_format *fmt)
 {
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
 	const struct uvc_format *format;
 	const struct uvc_frame *frame;
 	int ret = 0;
@@ -395,14 +399,20 @@  static int uvc_v4l2_get_format(struct uvc_streaming *stream,
 	return ret;
 }
 
-static int uvc_v4l2_set_format(struct uvc_streaming *stream,
-	struct v4l2_format *fmt)
+static int uvc_ioctl_s_fmt(struct file *file, void *fh,
+			   struct v4l2_format *fmt)
 {
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
 	struct uvc_streaming_control probe;
 	const struct uvc_format *format;
 	const struct uvc_frame *frame;
 	int ret;
 
+	ret = uvc_acquire_privileges(handle);
+	if (ret)
+		return ret;
+
 	if (fmt->type != stream->type)
 		return -EINVAL;
 
@@ -426,10 +436,12 @@  static int uvc_v4l2_set_format(struct uvc_streaming *stream,
 	return ret;
 }
 
-static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
-		struct v4l2_streamparm *parm)
+static int uvc_ioctl_g_parm(struct file *file, void *fh,
+			    struct v4l2_streamparm *parm)
 {
 	u32 numerator, denominator;
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
 
 	if (parm->type != stream->type)
 		return -EINVAL;
@@ -461,9 +473,11 @@  static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
 	return 0;
 }
 
-static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
-		struct v4l2_streamparm *parm)
+static int uvc_ioctl_s_parm(struct file *file, void *fh,
+			    struct v4l2_streamparm *parm)
 {
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
 	struct uvc_streaming_control probe;
 	struct v4l2_fract timeperframe;
 	const struct uvc_format *format;
@@ -472,6 +486,10 @@  static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 	unsigned int i;
 	int ret;
 
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
 	if (parm->type != stream->type)
 		return -EINVAL;
 
@@ -573,6 +591,7 @@  static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
  * - VIDIOC_S_INPUT
  * - VIDIOC_S_PARM
  * - VIDIOC_S_FMT
+ * - VIDIOC_CREATE_BUFS
  * - VIDIOC_REQBUFS
  */
 static int uvc_acquire_privileges(struct uvc_fh *handle)
@@ -685,11 +704,13 @@  static int uvc_ioctl_querycap(struct file *file, void *fh,
 	return 0;
 }
 
-static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
+static int uvc_ioctl_enum_fmt(struct file *file, void *fh,
 			      struct v4l2_fmtdesc *fmt)
 {
-	const struct uvc_format *format;
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
 	enum v4l2_buf_type type = fmt->type;
+	const struct uvc_format *format;
 	u32 index = fmt->index;
 
 	if (fmt->type != stream->type || fmt->index >= stream->nformats)
@@ -707,82 +728,8 @@  static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
 	return 0;
 }
 
-static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
-				      struct v4l2_fmtdesc *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-
-	return uvc_ioctl_enum_fmt(stream, fmt);
-}
-
-static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
-				      struct v4l2_fmtdesc *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-
-	return uvc_ioctl_enum_fmt(stream, fmt);
-}
-
-static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
-				   struct v4l2_format *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-
-	return uvc_v4l2_get_format(stream, fmt);
-}
-
-static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
-				   struct v4l2_format *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-
-	return uvc_v4l2_get_format(stream, fmt);
-}
-
-static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
-				   struct v4l2_format *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-	int ret;
-
-	ret = uvc_acquire_privileges(handle);
-	if (ret < 0)
-		return ret;
-
-	return uvc_v4l2_set_format(stream, fmt);
-}
-
-static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
-				   struct v4l2_format *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-	int ret;
-
-	ret = uvc_acquire_privileges(handle);
-	if (ret < 0)
-		return ret;
-
-	return uvc_v4l2_set_format(stream, fmt);
-}
-
-static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
-				     struct v4l2_format *fmt)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-	struct uvc_streaming_control probe;
-
-	return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
-}
-
-static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
-				     struct v4l2_format *fmt)
+static int uvc_ioctl_try_fmt(struct file *file, void *fh,
+			     struct v4l2_format *fmt)
 {
 	struct uvc_fh *handle = fh;
 	struct uvc_streaming *stream = handle->stream;
@@ -1212,29 +1159,6 @@  static int uvc_ioctl_g_selection(struct file *file, void *fh,
 	return 0;
 }
 
-static int uvc_ioctl_g_parm(struct file *file, void *fh,
-			    struct v4l2_streamparm *parm)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-
-	return uvc_v4l2_get_streamparm(stream, parm);
-}
-
-static int uvc_ioctl_s_parm(struct file *file, void *fh,
-			    struct v4l2_streamparm *parm)
-{
-	struct uvc_fh *handle = fh;
-	struct uvc_streaming *stream = handle->stream;
-	int ret;
-
-	ret = uvc_acquire_privileges(handle);
-	if (ret < 0)
-		return ret;
-
-	return uvc_v4l2_set_streamparm(stream, parm);
-}
-
 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
 				     struct v4l2_frmsizeenum *fsize)
 {
@@ -1543,15 +1467,17 @@  static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
 #endif
 
 const struct v4l2_ioctl_ops uvc_ioctl_ops = {
+	.vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt,
+	.vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt,
+	.vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt,
+	.vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt,
+	.vidioc_g_parm = uvc_ioctl_g_parm,
+	.vidioc_s_parm = uvc_ioctl_s_parm,
 	.vidioc_querycap = uvc_ioctl_querycap,
-	.vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
-	.vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
-	.vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
-	.vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
-	.vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
-	.vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
-	.vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
-	.vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
+	.vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt,
+	.vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt,
+	.vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt,
+	.vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt,
 	.vidioc_reqbufs = uvc_ioctl_reqbufs,
 	.vidioc_querybuf = uvc_ioctl_querybuf,
 	.vidioc_qbuf = uvc_ioctl_qbuf,
@@ -1570,8 +1496,6 @@  const struct v4l2_ioctl_ops uvc_ioctl_ops = {
 	.vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
 	.vidioc_querymenu = uvc_ioctl_querymenu,
 	.vidioc_g_selection = uvc_ioctl_g_selection,
-	.vidioc_g_parm = uvc_ioctl_g_parm,
-	.vidioc_s_parm = uvc_ioctl_s_parm,
 	.vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
 	.vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
 	.vidioc_subscribe_event = uvc_ioctl_subscribe_event,