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Message-Id: <20241129-uvc-dup-cap-out-v2-1-596cb9bdd5e8@chromium.org>
Date: Fri, 29 Nov 2024 19:28:26 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hans de Goede <hdegoede@...hat.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2] media: uvcvideo: Remove duplicated cap/out code
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@...omium.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(-)
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,
---
base-commit: 72ad4ff638047bbbdf3232178fea4bec1f429319
change-id: 20241127-uvc-dup-cap-out-6a03c01e30a3
Best regards,
--
Ricardo Ribalda <ribalda@...omium.org>
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