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linux_dsm_epyc7002/drivers/media/v4l2-core/v4l2-common.c
Ezequiel Garcia ff35213fda media: v4l2-core: Module re-organization 
videodev.ko and v4l2-common.ko driver are built under
the same conditions. Therefore, it doesn't make much sense
to split them in two different modules.

Splitting v4l2-common to its own driver was done many years ago:

  commit a9254475bb
  Author: Mauro Carvalho Chehab <mchehab@infradead.org>
  Date:   Tue Jan 29 18:32:35 2008 -0300

      V4L/DVB (7115): Fix bug #9833: regression when compiling V4L without I2C

Back then, the subsystem organization was different and the module split
was needed. However, with the current organization, there is no issue
compiling V4L2 with I2C as y/m/n.

This commit makes v4l2-common part of our V4L2 core driver (videodev.ko).

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-08-26 10:48:15 -03:00

652 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Video for Linux Two
*
* A generic video device interface for the LINUX operating system
* using a set of device structures/vectors for low level operations.
*
* This file replaces the videodev.c file that comes with the
* regular kernel distribution.
*
* Author: Bill Dirks <bill@thedirks.org>
* based on code by Alan Cox, <alan@cymru.net>
*/
/*
* Video capture interface for Linux
*
* A generic video device interface for the LINUX operating system
* using a set of device structures/vectors for low level operations.
*
* Author: Alan Cox, <alan@lxorguk.ukuu.org.uk>
*
* Fixes:
*/
/*
* Video4linux 1/2 integration by Justin Schoeman
* <justin@suntiger.ee.up.ac.za>
* 2.4 PROCFS support ported from 2.4 kernels by
* Iñaki García Etxebarria <garetxe@euskalnet.net>
* Makefile fix by "W. Michael Petullo" <mike@flyn.org>
* 2.4 devfs support ported from 2.4 kernels by
* Dan Merillat <dan@merillat.org>
* Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#if defined(CONFIG_SPI)
#include <linux/spi/spi.h>
#endif
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/div64.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <linux/videodev2.h>
/*
*
* V 4 L 2 D R I V E R H E L P E R A P I
*
*/
/*
* Video Standard Operations (contributed by Michael Schimek)
*/
/* Helper functions for control handling */
/* Fill in a struct v4l2_queryctrl */
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
{
const char *name;
s64 min = _min;
s64 max = _max;
u64 step = _step;
s64 def = _def;
v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
&min, &max, &step, &def, &qctrl->flags);
if (name == NULL)
return -EINVAL;
qctrl->minimum = min;
qctrl->maximum = max;
qctrl->step = step;
qctrl->default_value = def;
qctrl->reserved[0] = qctrl->reserved[1] = 0;
strscpy(qctrl->name, name, sizeof(qctrl->name));
return 0;
}
EXPORT_SYMBOL(v4l2_ctrl_query_fill);
/* I2C Helper functions */
#if IS_ENABLED(CONFIG_I2C)
void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
const char *devname, const char *postfix)
{
if (!devname)
devname = client->dev.driver->name;
if (!postfix)
postfix = "";
snprintf(sd->name, sizeof(sd->name), "%s%s %d-%04x", devname, postfix,
i2c_adapter_id(client->adapter), client->addr);
}
EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_set_name);
void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
const struct v4l2_subdev_ops *ops)
{
v4l2_subdev_init(sd, ops);
sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
/* the owner is the same as the i2c_client's driver owner */
sd->owner = client->dev.driver->owner;
sd->dev = &client->dev;
/* i2c_client and v4l2_subdev point to one another */
v4l2_set_subdevdata(sd, client);
i2c_set_clientdata(client, sd);
v4l2_i2c_subdev_set_name(sd, client, NULL, NULL);
}
EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
/* Load an i2c sub-device. */
struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, struct i2c_board_info *info,
const unsigned short *probe_addrs)
{
struct v4l2_subdev *sd = NULL;
struct i2c_client *client;
BUG_ON(!v4l2_dev);
request_module(I2C_MODULE_PREFIX "%s", info->type);
/* Create the i2c client */
if (info->addr == 0 && probe_addrs)
client = i2c_new_probed_device(adapter, info, probe_addrs,
NULL);
else
client = i2c_new_device(adapter, info);
/* Note: by loading the module first we are certain that c->driver
will be set if the driver was found. If the module was not loaded
first, then the i2c core tries to delay-load the module for us,
and then c->driver is still NULL until the module is finally
loaded. This delay-load mechanism doesn't work if other drivers
want to use the i2c device, so explicitly loading the module
is the best alternative. */
if (client == NULL || client->dev.driver == NULL)
goto error;
/* Lock the module so we can safely get the v4l2_subdev pointer */
if (!try_module_get(client->dev.driver->owner))
goto error;
sd = i2c_get_clientdata(client);
/* Register with the v4l2_device which increases the module's
use count as well. */
if (v4l2_device_register_subdev(v4l2_dev, sd))
sd = NULL;
/* Decrease the module use count to match the first try_module_get. */
module_put(client->dev.driver->owner);
error:
/* If we have a client but no subdev, then something went wrong and
we must unregister the client. */
if (client && sd == NULL)
i2c_unregister_device(client);
return sd;
}
EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
struct i2c_adapter *adapter, const char *client_type,
u8 addr, const unsigned short *probe_addrs)
{
struct i2c_board_info info;
/* Setup the i2c board info with the device type and
the device address. */
memset(&info, 0, sizeof(info));
strscpy(info.type, client_type, sizeof(info.type));
info.addr = addr;
return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, probe_addrs);
}
EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
/* Return i2c client address of v4l2_subdev. */
unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return client ? client->addr : I2C_CLIENT_END;
}
EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
/* Return a list of I2C tuner addresses to probe. Use only if the tuner
addresses are unknown. */
const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
{
static const unsigned short radio_addrs[] = {
#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
0x10,
#endif
0x60,
I2C_CLIENT_END
};
static const unsigned short demod_addrs[] = {
0x42, 0x43, 0x4a, 0x4b,
I2C_CLIENT_END
};
static const unsigned short tv_addrs[] = {
0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
0x60, 0x61, 0x62, 0x63, 0x64,
I2C_CLIENT_END
};
switch (type) {
case ADDRS_RADIO:
return radio_addrs;
case ADDRS_DEMOD:
return demod_addrs;
case ADDRS_TV:
return tv_addrs;
case ADDRS_TV_WITH_DEMOD:
return tv_addrs + 4;
}
return NULL;
}
EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
#endif /* defined(CONFIG_I2C) */
#if defined(CONFIG_SPI)
/* Load an spi sub-device. */
void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
const struct v4l2_subdev_ops *ops)
{
v4l2_subdev_init(sd, ops);
sd->flags |= V4L2_SUBDEV_FL_IS_SPI;
/* the owner is the same as the spi_device's driver owner */
sd->owner = spi->dev.driver->owner;
sd->dev = &spi->dev;
/* spi_device and v4l2_subdev point to one another */
v4l2_set_subdevdata(sd, spi);
spi_set_drvdata(spi, sd);
/* initialize name */
snprintf(sd->name, sizeof(sd->name), "%s %s",
spi->dev.driver->name, dev_name(&spi->dev));
}
EXPORT_SYMBOL_GPL(v4l2_spi_subdev_init);
struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
struct spi_master *master, struct spi_board_info *info)
{
struct v4l2_subdev *sd = NULL;
struct spi_device *spi = NULL;
BUG_ON(!v4l2_dev);
if (info->modalias[0])
request_module(info->modalias);
spi = spi_new_device(master, info);
if (spi == NULL || spi->dev.driver == NULL)
goto error;
if (!try_module_get(spi->dev.driver->owner))
goto error;
sd = spi_get_drvdata(spi);
/* Register with the v4l2_device which increases the module's
use count as well. */
if (v4l2_device_register_subdev(v4l2_dev, sd))
sd = NULL;
/* Decrease the module use count to match the first try_module_get. */
module_put(spi->dev.driver->owner);
error:
/* If we have a client but no subdev, then something went wrong and
we must unregister the client. */
if (!sd)
spi_unregister_device(spi);
return sd;
}
EXPORT_SYMBOL_GPL(v4l2_spi_new_subdev);
#endif /* defined(CONFIG_SPI) */
/* Clamp x to be between min and max, aligned to a multiple of 2^align. min
* and max don't have to be aligned, but there must be at least one valid
* value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
* of 16 between 17 and 31. */
static unsigned int clamp_align(unsigned int x, unsigned int min,
unsigned int max, unsigned int align)
{
/* Bits that must be zero to be aligned */
unsigned int mask = ~((1 << align) - 1);
/* Clamp to aligned min and max */
x = clamp(x, (min + ~mask) & mask, max & mask);
/* Round to nearest aligned value */
if (align)
x = (x + (1 << (align - 1))) & mask;
return x;
}
static unsigned int clamp_roundup(unsigned int x, unsigned int min,
unsigned int max, unsigned int alignment)
{
x = clamp(x, min, max);
if (alignment)
x = round_up(x, alignment);
return x;
}
void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
unsigned int walign,
u32 *h, unsigned int hmin, unsigned int hmax,
unsigned int halign, unsigned int salign)
{
*w = clamp_align(*w, wmin, wmax, walign);
*h = clamp_align(*h, hmin, hmax, halign);
/* Usually we don't need to align the size and are done now. */
if (!salign)
return;
/* How much alignment do we have? */
walign = __ffs(*w);
halign = __ffs(*h);
/* Enough to satisfy the image alignment? */
if (walign + halign < salign) {
/* Max walign where there is still a valid width */
unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
/* Max halign where there is still a valid height */
unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
/* up the smaller alignment until we have enough */
do {
if (halign >= hmaxa ||
(walign <= halign && walign < wmaxa)) {
*w = clamp_align(*w, wmin, wmax, walign + 1);
walign = __ffs(*w);
} else {
*h = clamp_align(*h, hmin, hmax, halign + 1);
halign = __ffs(*h);
}
} while (halign + walign < salign);
}
}
EXPORT_SYMBOL_GPL(v4l_bound_align_image);
const void *
__v4l2_find_nearest_size(const void *array, size_t array_size,
size_t entry_size, size_t width_offset,
size_t height_offset, s32 width, s32 height)
{
u32 error, min_error = U32_MAX;
const void *best = NULL;
unsigned int i;
if (!array)
return NULL;
for (i = 0; i < array_size; i++, array += entry_size) {
const u32 *entry_width = array + width_offset;
const u32 *entry_height = array + height_offset;
error = abs(*entry_width - width) + abs(*entry_height - height);
if (error > min_error)
continue;
min_error = error;
best = array;
if (!error)
break;
}
return best;
}
EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
int v4l2_g_parm_cap(struct video_device *vdev,
struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
struct v4l2_subdev_frame_interval ival = { 0 };
int ret;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
if (vdev->device_caps & V4L2_CAP_READWRITE)
a->parm.capture.readbuffers = 2;
if (v4l2_subdev_has_op(sd, video, g_frame_interval))
a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
if (!ret)
a->parm.capture.timeperframe = ival.interval;
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
int v4l2_s_parm_cap(struct video_device *vdev,
struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
struct v4l2_subdev_frame_interval ival = {
.interval = a->parm.capture.timeperframe
};
int ret;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
memset(&a->parm, 0, sizeof(a->parm));
if (vdev->device_caps & V4L2_CAP_READWRITE)
a->parm.capture.readbuffers = 2;
else
a->parm.capture.readbuffers = 0;
if (v4l2_subdev_has_op(sd, video, g_frame_interval))
a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
if (!ret)
a->parm.capture.timeperframe = ival.interval;
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
const struct v4l2_format_info *v4l2_format_info(u32 format)
{
static const struct v4l2_format_info formats[] = {
/* RGB formats */
{ .format = V4L2_PIX_FMT_BGR24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGB24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_HSV24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_XBGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGRX32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_XRGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGBX32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_HSV32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_ARGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGBA32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_ABGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGRA32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_GREY, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
/* YUV packed formats */
{ .format = V4L2_PIX_FMT_YUYV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YVYU, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_UYVY, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_VYUY, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
/* YUV planar formats */
{ .format = V4L2_PIX_FMT_NV12, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_NV21, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_NV16, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV61, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV24, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV42, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YUV410, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
{ .format = V4L2_PIX_FMT_YVU410, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
{ .format = V4L2_PIX_FMT_YUV411P, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YUV420, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_YVU420, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_YUV422P, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
/* YUV planar formats, non contiguous variant */
{ .format = V4L2_PIX_FMT_YUV420M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_YVU420M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_YUV422M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YVU422M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YUV444M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_YVU444M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV12M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_NV21M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
{ .format = V4L2_PIX_FMT_NV16M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_NV61M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
/* Bayer RGB formats */
{ .format = V4L2_PIX_FMT_SBGGR8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGBRG8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGRBG8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SRGGB8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SBGGR10, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGBRG10, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGRBG10, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SRGGB10, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SBGGR10ALAW8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGBRG10ALAW8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGRBG10ALAW8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SRGGB10ALAW8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SBGGR10DPCM8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGBRG10DPCM8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGRBG10DPCM8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SRGGB10DPCM8, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SBGGR12, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGBRG12, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SGRBG12, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_SRGGB12, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
};
unsigned int i;
for (i = 0; i < ARRAY_SIZE(formats); ++i)
if (formats[i].format == format)
return &formats[i];
return NULL;
}
EXPORT_SYMBOL(v4l2_format_info);
static inline unsigned int v4l2_format_block_width(const struct v4l2_format_info *info, int plane)
{
if (!info->block_w[plane])
return 1;
return info->block_w[plane];
}
static inline unsigned int v4l2_format_block_height(const struct v4l2_format_info *info, int plane)
{
if (!info->block_h[plane])
return 1;
return info->block_h[plane];
}
void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
const struct v4l2_frmsize_stepwise *frmsize)
{
if (!frmsize)
return;
/*
* Clamp width/height to meet min/max constraints and round it up to
* macroblock alignment.
*/
*width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
frmsize->step_width);
*height = clamp_roundup(*height, frmsize->min_height, frmsize->max_height,
frmsize->step_height);
}
EXPORT_SYMBOL_GPL(v4l2_apply_frmsize_constraints);
int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
u32 pixelformat, u32 width, u32 height)
{
const struct v4l2_format_info *info;
struct v4l2_plane_pix_format *plane;
int i;
info = v4l2_format_info(pixelformat);
if (!info)
return -EINVAL;
pixfmt->width = width;
pixfmt->height = height;
pixfmt->pixelformat = pixelformat;
pixfmt->num_planes = info->mem_planes;
if (info->mem_planes == 1) {
plane = &pixfmt->plane_fmt[0];
plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
plane->sizeimage = 0;
for (i = 0; i < info->comp_planes; i++) {
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
unsigned int aligned_width;
unsigned int aligned_height;
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
plane->sizeimage += info->bpp[i] *
DIV_ROUND_UP(aligned_width, hdiv) *
DIV_ROUND_UP(aligned_height, vdiv);
}
} else {
for (i = 0; i < info->comp_planes; i++) {
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
unsigned int aligned_width;
unsigned int aligned_height;
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
plane = &pixfmt->plane_fmt[i];
plane->bytesperline =
info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
plane->sizeimage =
plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
}
}
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
u32 width, u32 height)
{
const struct v4l2_format_info *info;
int i;
info = v4l2_format_info(pixelformat);
if (!info)
return -EINVAL;
/* Single planar API cannot be used for multi plane formats. */
if (info->mem_planes > 1)
return -EINVAL;
pixfmt->width = width;
pixfmt->height = height;
pixfmt->pixelformat = pixelformat;
pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
pixfmt->sizeimage = 0;
for (i = 0; i < info->comp_planes; i++) {
unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
unsigned int aligned_width;
unsigned int aligned_height;
aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
pixfmt->sizeimage += info->bpp[i] *
DIV_ROUND_UP(aligned_width, hdiv) *
DIV_ROUND_UP(aligned_height, vdiv);
}
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
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