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[media] v4l2: drop V4L2_CHIP_MATCH_SUBDEV_NAME
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After using the new VIDIOC_DBG_G_CHIP_NAME ioctl I realized that the matching
by name possibility is useless. Just drop it and rename MATCH_SUBDEV_IDX to
just MATCH_SUBDEV.
The v4l2-dbg utility is much better placed to match by name by just enumerating
all bridge and subdev devices until chip_name.name matches.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Hans Verkuil authored and Mauro Carvalho Chehab committed Apr 14, 2013
1 parent cd634f1 commit 3eef251
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Showing 6 changed files with 26 additions and 77 deletions.
7 changes: 1 addition & 6 deletions Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-ident.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -221,13 +221,8 @@ the values from <xref linkend="chip-ids" />.</entry>
<entry>Match the nth anciliary AC97 chip.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_NAME</constant></entry>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>
<entry>Match the sub-device by name. Can't be used with this ioctl.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_IDX</constant></entry>
<entry>5</entry>
<entry>Match the nth sub-device. Can't be used with this ioctl.</entry>
</row>
</tbody>
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18 changes: 2 additions & 16 deletions Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-name.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -87,16 +87,7 @@ connected to the PCI or USB bus. Non-zero numbers identify specific
parts of the bridge chip such as an AC97 register block.</para>

<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_SUBDEV_NAME</constant>,
<structfield>match.name</structfield> contains the name of a sub-device.
For instance
<constant>"saa7127 6-0044"</constant> will match the saa7127 sub-device
at the given i2c bus. This match type is not very useful for this ioctl
and is here only for consistency.
</para>

<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_SUBDEV_IDX</constant>,
<constant>V4L2_CHIP_MATCH_SUBDEV</constant>,
<structfield>match.addr</structfield> selects the nth sub-device. This
allows you to enumerate over all sub-devices.</para>

Expand Down Expand Up @@ -207,13 +198,8 @@ is set, then the driver supports reading registers from the device. If
<entry>Match the nth anciliary AC97 chip. Can't be used with this ioctl.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_NAME</constant></entry>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>
<entry>Match the sub-device by name.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_IDX</constant></entry>
<entry>5</entry>
<entry>Match the nth sub-device.</entry>
</row>
</tbody>
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17 changes: 2 additions & 15 deletions Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -123,15 +123,7 @@ bus address.</para>
on the TV card.</para>

<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_SUBDEV_NAME</constant>,
<structfield>match.name</structfield> contains the sub-device name.
For instance
<constant>"saa7127 6-0044"</constant> will match this specific saa7127
sub-device. Again with the &VIDIOC-DBG-G-CHIP-NAME; ioctl you can find
out which sub-devices are present.</para>

<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_SUBDEV_IDX</constant>,
<constant>V4L2_CHIP_MATCH_SUBDEV</constant>,
<structfield>match.addr</structfield> selects the nth sub-device.</para>

<note>
Expand Down Expand Up @@ -250,13 +242,8 @@ register.</entry>
<entry>Match the nth anciliary AC97 chip.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_NAME</constant></entry>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>
<entry>Match the sub-device by name.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV_IDX</constant></entry>
<entry>5</entry>
<entry>Match the nth sub-device.</entry>
</row>
</tbody>
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3 changes: 1 addition & 2 deletions drivers/media/v4l2-core/v4l2-common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -254,8 +254,7 @@ int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match
return len && !strncmp(c->driver->driver.name, match->name, len);
case V4L2_CHIP_MATCH_I2C_ADDR:
return c->addr == match->addr;
case V4L2_CHIP_MATCH_SUBDEV_IDX:
case V4L2_CHIP_MATCH_SUBDEV_NAME:
case V4L2_CHIP_MATCH_SUBDEV:
return 1;
default:
return 0;
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55 changes: 19 additions & 36 deletions drivers/media/v4l2-core/v4l2-ioctl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -629,8 +629,7 @@ static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
const struct v4l2_dbg_chip_ident *p = arg;

pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
Expand All @@ -644,8 +643,7 @@ static void v4l_print_dbg_chip_name(const void *arg, bool write_only)
const struct v4l2_dbg_chip_name *p = arg;

pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
Expand All @@ -658,8 +656,7 @@ static void v4l_print_dbg_register(const void *arg, bool write_only)
const struct v4l2_dbg_register *p = arg;

pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
Expand Down Expand Up @@ -1791,14 +1788,6 @@ static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
return ret;
}

static bool v4l_dbg_found_match(const struct v4l2_dbg_match *match,
struct v4l2_subdev *sd, int idx)
{
if (match->type == V4L2_CHIP_MATCH_SUBDEV_IDX)
return match->addr == idx;
return !strcmp(match->name, sd->name);
}

static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
Expand All @@ -1810,14 +1799,12 @@ static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,

if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME) {
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
if (vfd->v4l2_dev == NULL)
return -EINVAL;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
if (v4l_dbg_found_match(&p->match, sd, idx++))
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
if (p->match.addr == idx++)
return v4l2_subdev_call(sd, core, g_register, p);
}
return -EINVAL;
}
if (ops->vidioc_g_register)
Expand All @@ -1839,14 +1826,12 @@ static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,

if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME) {
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
if (vfd->v4l2_dev == NULL)
return -EINVAL;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
if (v4l_dbg_found_match(&p->match, sd, idx++))
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
if (p->match.addr == idx++)
return v4l2_subdev_call(sd, core, s_register, p);
}
return -EINVAL;
}
if (ops->vidioc_s_register)
Expand All @@ -1864,8 +1849,7 @@ static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,

p->ident = V4L2_IDENT_NONE;
p->revision = 0;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME ||
p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX)
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
return -EINVAL;
return ops->vidioc_g_chip_ident(file, fh, p);
}
Expand Down Expand Up @@ -1897,19 +1881,18 @@ static int v4l_dbg_g_chip_name(const struct v4l2_ioctl_ops *ops,
strlcpy(p->name, "bridge", sizeof(p->name));
return 0;

case V4L2_CHIP_MATCH_SUBDEV_IDX:
case V4L2_CHIP_MATCH_SUBDEV_NAME:
case V4L2_CHIP_MATCH_SUBDEV:
if (vfd->v4l2_dev == NULL)
break;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
if (v4l_dbg_found_match(&p->match, sd, idx++)) {
if (sd->ops->core && sd->ops->core->s_register)
p->flags |= V4L2_CHIP_FL_WRITABLE;
if (sd->ops->core && sd->ops->core->g_register)
p->flags |= V4L2_CHIP_FL_READABLE;
strlcpy(p->name, sd->name, sizeof(p->name));
return 0;
}
if (p->match.addr != idx++)
continue;
if (sd->ops->core && sd->ops->core->s_register)
p->flags |= V4L2_CHIP_FL_WRITABLE;
if (sd->ops->core && sd->ops->core->g_register)
p->flags |= V4L2_CHIP_FL_READABLE;
strlcpy(p->name, sd->name, sizeof(p->name));
return 0;
}
break;
}
Expand Down
3 changes: 1 addition & 2 deletions include/uapi/linux/videodev2.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1812,8 +1812,7 @@ struct v4l2_event_subscription {
#define V4L2_CHIP_MATCH_I2C_DRIVER 1 /* Match against I2C driver name */
#define V4L2_CHIP_MATCH_I2C_ADDR 2 /* Match against I2C 7-bit address */
#define V4L2_CHIP_MATCH_AC97 3 /* Match against anciliary AC97 chip */
#define V4L2_CHIP_MATCH_SUBDEV_NAME 4 /* Match against subdev name */
#define V4L2_CHIP_MATCH_SUBDEV_IDX 5 /* Match against subdev index */
#define V4L2_CHIP_MATCH_SUBDEV 4 /* Match against subdev index */

struct v4l2_dbg_match {
__u32 type; /* Match type */
Expand Down

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