[PATCH v3] videodev2: Set vb2_rect's width and height as unsigned

From: Ricardo Ribalda Delgado
Date: Wed Nov 06 2013 - 11:34:58 EST

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As addressed on the media summit 2013, there is no reason for the width
and height to be signed.

Therefore this patch is an attempt to convert those fields into unsigned.

v3: Comments by Sakari
-Update also doc

v2: Comments by Sakari Ailus and Laurent Pinchart

-Fix alignment on all drivers
-Replace min with min_t where possible and remove unneeded checks

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
---
Documentation/DocBook/media/v4l/compat.xml | 12 ++++++++
Documentation/DocBook/media/v4l/dev-overlay.xml | 8 ++---
Documentation/DocBook/media/v4l/vidioc-cropcap.xml | 8 ++---
drivers/media/i2c/mt9m032.c | 16 +++++-----
drivers/media/i2c/mt9p031.c | 28 ++++++++++--------
drivers/media/i2c/mt9t001.c | 26 ++++++++++-------
drivers/media/i2c/mt9v032.c | 34 ++++++++++++----------
drivers/media/i2c/smiapp/smiapp-core.c | 8 ++---
drivers/media/i2c/soc_camera/mt9m111.c | 4 +--
drivers/media/i2c/tvp5150.c | 14 ++++-----
drivers/media/pci/bt8xx/bttv-driver.c | 6 ++--
drivers/media/pci/saa7134/saa7134-video.c | 4 ---
drivers/media/platform/soc_camera/soc_scale_crop.c | 4 +--
include/uapi/linux/videodev2.h | 4 +--
14 files changed, 97 insertions(+), 79 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml
index 0c7195e..5dbe68b 100644
--- a/Documentation/DocBook/media/v4l/compat.xml
+++ b/Documentation/DocBook/media/v4l/compat.xml
@@ -2523,6 +2523,18 @@ that used it. It was originally scheduled for removal in 2.6.35.
</orderedlist>
</section>

+ <section>
+ <title>V4L2 in Linux 3.12</title>
+ <orderedlist>
+ <listitem>
+ <para> In struct <structname>v4l2_rect</structname>, the type
+of <structfield>width</structfield> and <structfield>height</structfield>
+fields changed from _s32 to _u32.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
<section id="other">
<title>Relation of V4L2 to other Linux multimedia APIs</title>

diff --git a/Documentation/DocBook/media/v4l/dev-overlay.xml b/Documentation/DocBook/media/v4l/dev-overlay.xml
index 40d1d76..a44ac66 100644
--- a/Documentation/DocBook/media/v4l/dev-overlay.xml
+++ b/Documentation/DocBook/media/v4l/dev-overlay.xml
@@ -346,16 +346,14 @@ rectangle, in pixels.</entry>
rectangle, in pixels. Offsets increase to the right and down.</entry>
</row>
<row>
- <entry>__s32</entry>
+ <entry>__u32</entry>
<entry><structfield>width</structfield></entry>
<entry>Width of the rectangle, in pixels.</entry>
</row>
<row>
- <entry>__s32</entry>
+ <entry>__u32</entry>
<entry><structfield>height</structfield></entry>
- <entry>Height of the rectangle, in pixels. Width and
-height cannot be negative, the fields are signed for hysterical
-reasons. </entry>
</row>
</tbody>
diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
index bf7cc97..26b8f8f 100644
--- a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
@@ -133,16 +133,14 @@ rectangle, in pixels.</entry>
rectangle, in pixels.</entry>
</row>
<row>
- <entry>__s32</entry>
+ <entry>__u32</entry>
<entry><structfield>width</structfield></entry>
<entry>Width of the rectangle, in pixels.</entry>
</row>
<row>
- <entry>__s32</entry>
+ <entry>__u32</entry>
<entry><structfield>height</structfield></entry>
- <entry>Height of the rectangle, in pixels. Width
-and height cannot be negative, the fields are signed for
-hysterical reasons. 
</entry>
</row>
diff --git a/drivers/media/i2c/mt9m032.c b/drivers/media/i2c/mt9m032.c
index 846b15f..85ec3ba 100644
--- a/drivers/media/i2c/mt9m032.c
+++ b/drivers/media/i2c/mt9m032.c
@@ -459,13 +459,15 @@ static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev,
MT9M032_COLUMN_START_MAX);
rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN,
MT9M032_ROW_START_MAX);
- rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN,
- MT9M032_COLUMN_SIZE_MAX);
- rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN,
- MT9M032_ROW_SIZE_MAX);
-
- rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
- rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
+ rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+ MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX);
+ rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+ MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX);
+
+ rect.width = min_t(unsigned int, rect.width,
+ MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);

__crop = __mt9m032_get_pad_crop(sensor, fh, crop->which);

diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index 4734836..722f78a 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -518,11 +518,13 @@ static int mt9p031_set_format(struct v4l2_subdev *subdev,

/* Clamp the width and height to avoid dividing by zero. */
width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
- max(__crop->width / 7, MT9P031_WINDOW_WIDTH_MIN),
+ max_t(unsigned int, __crop->width / 7,
+ MT9P031_WINDOW_WIDTH_MIN),
__crop->width);
height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
- max(__crop->height / 8, MT9P031_WINDOW_HEIGHT_MIN),
- __crop->height);
+ max_t(unsigned int, __crop->height / 8,
+ MT9P031_WINDOW_HEIGHT_MIN),
+ __crop->height);

hratio = DIV_ROUND_CLOSEST(__crop->width, width);
vratio = DIV_ROUND_CLOSEST(__crop->height, height);
@@ -564,15 +566,17 @@ static int mt9p031_set_crop(struct v4l2_subdev *subdev,
MT9P031_COLUMN_START_MAX);
rect.top = clamp(ALIGN(crop->rect.top, 2), MT9P031_ROW_START_MIN,
MT9P031_ROW_START_MAX);
- rect.width = clamp(ALIGN(crop->rect.width, 2),
- MT9P031_WINDOW_WIDTH_MIN,
- MT9P031_WINDOW_WIDTH_MAX);
- rect.height = clamp(ALIGN(crop->rect.height, 2),
- MT9P031_WINDOW_HEIGHT_MIN,
- MT9P031_WINDOW_HEIGHT_MAX);
-
- rect.width = min(rect.width, MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
- rect.height = min(rect.height, MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
+ rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+ MT9P031_WINDOW_WIDTH_MIN,
+ MT9P031_WINDOW_WIDTH_MAX);
+ rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+ MT9P031_WINDOW_HEIGHT_MIN,
+ MT9P031_WINDOW_HEIGHT_MAX);
+
+ rect.width = min_t(unsigned int, rect.width,
+ MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);

__crop = __mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which);

diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c
index 7964634..d41c70e 100644
--- a/drivers/media/i2c/mt9t001.c
+++ b/drivers/media/i2c/mt9t001.c
@@ -291,10 +291,12 @@ static int mt9t001_set_format(struct v4l2_subdev *subdev,

/* Clamp the width and height to avoid dividing by zero. */
width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
- max(__crop->width / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+ max_t(unsigned int, __crop->width / 8,
+ MT9T001_WINDOW_HEIGHT_MIN + 1),
__crop->width);
height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
- max(__crop->height / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+ max_t(unsigned int, __crop->height / 8,
+ MT9T001_WINDOW_HEIGHT_MIN + 1),
__crop->height);

hratio = DIV_ROUND_CLOSEST(__crop->width, width);
@@ -339,15 +341,17 @@ static int mt9t001_set_crop(struct v4l2_subdev *subdev,
rect.top = clamp(ALIGN(crop->rect.top, 2),
MT9T001_ROW_START_MIN,
MT9T001_ROW_START_MAX);
- rect.width = clamp(ALIGN(crop->rect.width, 2),
- MT9T001_WINDOW_WIDTH_MIN + 1,
- MT9T001_WINDOW_WIDTH_MAX + 1);
- rect.height = clamp(ALIGN(crop->rect.height, 2),
- MT9T001_WINDOW_HEIGHT_MIN + 1,
- MT9T001_WINDOW_HEIGHT_MAX + 1);
-
- rect.width = min(rect.width, MT9T001_PIXEL_ARRAY_WIDTH - rect.left);
- rect.height = min(rect.height, MT9T001_PIXEL_ARRAY_HEIGHT - rect.top);
+ rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+ MT9T001_WINDOW_WIDTH_MIN + 1,
+ MT9T001_WINDOW_WIDTH_MAX + 1);
+ rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+ MT9T001_WINDOW_HEIGHT_MIN + 1,
+ MT9T001_WINDOW_HEIGHT_MAX + 1);
+
+ rect.width = min_t(unsigned int, rect.width,
+ MT9T001_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ MT9T001_PIXEL_ARRAY_HEIGHT - rect.top);

__crop = __mt9t001_get_pad_crop(mt9t001, fh, crop->pad, crop->which);

diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
index 2c50eff..ba8da9b 100644
--- a/drivers/media/i2c/mt9v032.c
+++ b/drivers/media/i2c/mt9v032.c
@@ -420,12 +420,14 @@ static int mt9v032_set_format(struct v4l2_subdev *subdev,
format->which);

/* Clamp the width and height to avoid dividing by zero. */
- width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
- max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
- __crop->width);
- height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
- max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
- __crop->height);
+ width = clamp(ALIGN(format->format.width, 2),
+ max_t(unsigned int, __crop->width / 8,
+ MT9V032_WINDOW_WIDTH_MIN),
+ __crop->width);
+ height = clamp(ALIGN(format->format.height, 2),
+ max_t(unsigned int, __crop->height / 8,
+ MT9V032_WINDOW_HEIGHT_MIN),
+ __crop->height);

hratio = DIV_ROUND_CLOSEST(__crop->width, width);
vratio = DIV_ROUND_CLOSEST(__crop->height, height);
@@ -471,15 +473,17 @@ static int mt9v032_set_crop(struct v4l2_subdev *subdev,
rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
MT9V032_ROW_START_MIN,
MT9V032_ROW_START_MAX);
- rect.width = clamp(ALIGN(crop->rect.width, 2),
- MT9V032_WINDOW_WIDTH_MIN,
- MT9V032_WINDOW_WIDTH_MAX);
- rect.height = clamp(ALIGN(crop->rect.height, 2),
- MT9V032_WINDOW_HEIGHT_MIN,
- MT9V032_WINDOW_HEIGHT_MAX);
-
- rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
- rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
+ rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+ MT9V032_WINDOW_WIDTH_MIN,
+ MT9V032_WINDOW_WIDTH_MAX);
+ rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+ MT9V032_WINDOW_HEIGHT_MIN,
+ MT9V032_WINDOW_HEIGHT_MAX);
+
+ rect.width = min_t(unsigned int,
+ rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int,
+ rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);

__crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index ae66d91..3fadb9e 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2028,8 +2028,8 @@ static int smiapp_set_crop(struct v4l2_subdev *subdev,
sel->r.width = min(sel->r.width, src_size->width);
sel->r.height = min(sel->r.height, src_size->height);

- sel->r.left = min(sel->r.left, src_size->width - sel->r.width);
- sel->r.top = min(sel->r.top, src_size->height - sel->r.height);
+ sel->r.left = min_t(int, sel->r.left, src_size->width - sel->r.width);
+ sel->r.top = min_t(int, sel->r.top, src_size->height - sel->r.height);

*crops[sel->pad] = sel->r;

@@ -2121,8 +2121,8 @@ static int smiapp_set_selection(struct v4l2_subdev *subdev,

sel->r.left = max(0, sel->r.left & ~1);
sel->r.top = max(0, sel->r.top & ~1);
- sel->r.width = max(0, SMIAPP_ALIGN_DIM(sel->r.width, sel->flags));
- sel->r.height = max(0, SMIAPP_ALIGN_DIM(sel->r.height, sel->flags));
+ sel->r.width = SMIAPP_ALIGN_DIM(sel->r.width, sel->flags);
+ sel->r.height = SMIAPP_ALIGN_DIM(sel->r.height, sel->flags);

sel->r.width = max_t(unsigned int,
sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE],
diff --git a/drivers/media/i2c/soc_camera/mt9m111.c b/drivers/media/i2c/soc_camera/mt9m111.c
index 6f40566..ccf5940 100644
--- a/drivers/media/i2c/soc_camera/mt9m111.c
+++ b/drivers/media/i2c/soc_camera/mt9m111.c
@@ -208,8 +208,8 @@ struct mt9m111 {
struct mt9m111_context *ctx;
struct v4l2_rect rect; /* cropping rectangle */
struct v4l2_clk *clk;
- int width; /* output */
- int height; /* sizes */
+ unsigned int width; /* output */
+ unsigned int height; /* sizes */
struct mutex power_lock; /* lock to protect power_count */
int power_count;
const struct mt9m111_datafmt *fmt;
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 89c0b13..7b8962e 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -867,7 +867,7 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
struct v4l2_rect rect = a->c;
struct tvp5150 *decoder = to_tvp5150(sd);
v4l2_std_id std;
- int hmax;
+ unsigned int hmax;

v4l2_dbg(1, debug, sd, "%s left=%d, top=%d, width=%d, height=%d\n",
__func__, rect.left, rect.top, rect.width, rect.height);
@@ -877,9 +877,9 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)

/* tvp5150 has some special limits */
rect.left = clamp(rect.left, 0, TVP5150_MAX_CROP_LEFT);
- rect.width = clamp(rect.width,
- TVP5150_H_MAX - TVP5150_MAX_CROP_LEFT - rect.left,
- TVP5150_H_MAX - rect.left);
+ rect.width = clamp_t(unsigned int, rect.width,
+ TVP5150_H_MAX - TVP5150_MAX_CROP_LEFT - rect.left,
+ TVP5150_H_MAX - rect.left);
rect.top = clamp(rect.top, 0, TVP5150_MAX_CROP_TOP);

/* Calculate height based on current standard */
@@ -893,9 +893,9 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
else
hmax = TVP5150_V_MAX_OTHERS;

- rect.height = clamp(rect.height,
- hmax - TVP5150_MAX_CROP_TOP - rect.top,
- hmax - rect.top);
+ rect.height = clamp_t(unsigned int, rect.height,
+ hmax - TVP5150_MAX_CROP_TOP - rect.top,
+ hmax - rect.top);

tvp5150_write(sd, TVP5150_VERT_BLANKING_START, rect.top);
tvp5150_write(sd, TVP5150_VERT_BLANKING_STOP,
diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
index c6532de..41ec4fa 100644
--- a/drivers/media/pci/bt8xx/bttv-driver.c
+++ b/drivers/media/pci/bt8xx/bttv-driver.c
@@ -1126,9 +1126,9 @@ bttv_crop_calc_limits(struct bttv_crop *c)
c->min_scaled_height = 32;
} else {
c->min_scaled_width =
- (max(48, c->rect.width >> 4) + 3) & ~3;
+ (max_t(unsigned int, 48, c->rect.width >> 4) + 3) & ~3;
c->min_scaled_height =
- max(32, c->rect.height >> 4);
+ max_t(unsigned int, 32, c->rect.height >> 4);
}

c->max_scaled_width = c->rect.width & ~3;
@@ -2024,7 +2024,7 @@ limit_scaled_size_lock (struct bttv_fh * fh,
/* We cannot scale up. When the scaled image is larger
than crop.rect we adjust the crop.rect as required
by the V4L2 spec, hence cropcap.bounds are our limit. */
- max_width = min(b->width, (__s32) MAX_HACTIVE);
+ max_width = min_t(unsigned int, b->width, MAX_HACTIVE);
max_height = b->height;

/* We cannot capture the same line as video and VBI data.
diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index fb60da8..bdbd805 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -1979,10 +1979,6 @@ static int saa7134_s_crop(struct file *file, void *f, const struct v4l2_crop *cr
if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
crop->type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
return -EINVAL;
- if (crop->c.height < 0)
- return -EINVAL;
- if (crop->c.width < 0)
- return -EINVAL;

if (res_locked(fh->dev, RESOURCE_OVERLAY))
return -EBUSY;
diff --git a/drivers/media/platform/soc_camera/soc_scale_crop.c b/drivers/media/platform/soc_camera/soc_scale_crop.c
index cbd3a34..8e74fb7 100644
--- a/drivers/media/platform/soc_camera/soc_scale_crop.c
+++ b/drivers/media/platform/soc_camera/soc_scale_crop.c
@@ -141,8 +141,8 @@ int soc_camera_client_s_crop(struct v4l2_subdev *sd,
* Popular special case - some cameras can only handle fixed sizes like
* QVGA, VGA,... Take care to avoid infinite loop.
*/
- width = max(cam_rect->width, 2);
- height = max(cam_rect->height, 2);
+ width = max_t(unsigned int, cam_rect->width, 2);
+ height = max_t(unsigned int, cam_rect->height, 2);

/*
* Loop as long as sensor is not covering the requested rectangle and
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 437f1b0..6ae7bbe 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -207,8 +207,8 @@ enum v4l2_priority {
struct v4l2_rect {
__s32 left;
__s32 top;
- __s32 width;
- __s32 height;
+ __u32 width;
+ __u32 height;
};

struct v4l2_fract {
--
1.8.4.rc3

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