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media: imx274: add cropping support via SELECTION API 

Currently this driver does not support cropping. The supported modes
are the following, all capturing the entire area:

 - 3840x2160, 1:1 binning (native sensor resolution)
 - 1920x1080, 2:1 binning
 - 1280x720,  3:1 binning

The VIDIOC_SUBDEV_S_FMT ioctl chooses among these 3 configurations the
one that matches the requested format.

Add cropping support via VIDIOC_SUBDEV_S_SELECTION: with target
V4L2_SEL_TGT_CROP to choose the captured area, with
V4L2_SEL_TGT_COMPOSE to choose the output resolution.

To maintain backward compatibility we also allow setting the compose
format via VIDIOC_SUBDEV_S_FMT. To obtain this, compose rect and
output format are computed in the common helper function
__imx274_change_compose(), which sets both to the same width/height
values.

Cropping also calls __imx274_change_compose() whenever cropping rect
size changes in order to reset the compose rect (and output format
size) for 1:1 binning.

Also rename enum imx274_mode to imx274_binning (and its values from
IMX274_MODE_BINNING_* to IMX274_BINNING_*). Without cropping, the two
naming are equivalent. With cropping, the resolution could be
different, e.g. using 2:1 binning mode to crop 1200x960 and output a
600x480 format. Using binning in the names avoids any
misunderstanding. For the same reason, replace the 'size' field in
struct imx274_frmfmt with 'bin_ratio'.

[Sakari Ailus: Remove leftover condition in imx274_apply_trimming]

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Luca Ceresoli 2018-07-25 12:24:55 -04:00 committed by Mauro Carvalho Chehab
parent 279b4b9aaa
commit 39dd23dc9d
1 changed files with 375 additions and 91 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

466
drivers/media/i2c/imx274.c
View File

@ -5,6 +5,7 @@
*
* Leon Luo <leonl@leopardimaging.com>
* Edwin Zou <edwinz@leopardimaging.com>
* Luca Ceresoli <luca@lucaceresoli.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@ -25,6 +26,7 @@
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
@ -74,7 +76,7 @@
*/
#define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72)
#define IMX274_DEFAULT_MODE IMX274_MODE_3840X2160
#define IMX274_DEFAULT_MODE IMX274_BINNING_OFF
#define IMX274_MAX_WIDTH (3840)
#define IMX274_MAX_HEIGHT (2160)
#define IMX274_MAX_FRAME_RATE (120)
@ -111,6 +113,20 @@
#define IMX274_SHR_REG_LSB 0x300C /* SHR */
#define IMX274_SVR_REG_MSB 0x300F /* SVR */
#define IMX274_SVR_REG_LSB 0x300E /* SVR */
#define IMX274_HTRIM_EN_REG 0x3037
#define IMX274_HTRIM_START_REG_LSB 0x3038
#define IMX274_HTRIM_START_REG_MSB 0x3039
#define IMX274_HTRIM_END_REG_LSB 0x303A
#define IMX274_HTRIM_END_REG_MSB 0x303B
#define IMX274_VWIDCUTEN_REG 0x30DD
#define IMX274_VWIDCUT_REG_LSB 0x30DE
#define IMX274_VWIDCUT_REG_MSB 0x30DF
#define IMX274_VWINPOS_REG_LSB 0x30E0
#define IMX274_VWINPOS_REG_MSB 0x30E1
#define IMX274_WRITE_VSIZE_REG_LSB 0x3130
#define IMX274_WRITE_VSIZE_REG_MSB 0x3131
#define IMX274_Y_OUT_SIZE_REG_LSB 0x3132
#define IMX274_Y_OUT_SIZE_REG_MSB 0x3133
#define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */
#define IMX274_VMAX_REG_2 0x30F9 /* VMAX */
#define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */
@ -140,10 +156,10 @@ static const struct regmap_config imx274_regmap_config = {
.cache_type = REGCACHE_RBTREE,
};
enum imx274_mode {
IMX274_MODE_3840X2160,
IMX274_MODE_1920X1080,
IMX274_MODE_1280X720,
enum imx274_binning {
IMX274_BINNING_OFF,
IMX274_BINNING_2_1,
IMX274_BINNING_3_1,
};
/*
@ -152,8 +168,8 @@ enum imx274_mode {
* These are the values to configure the sensor in one of the
* implemented modes.
*
* @size: recommended recording pixels
* @init_regs: registers to initialize the mode
* @bin_ratio: downscale factor (e.g. 3 for 3:1 binning)
* @min_frame_len: Minimum frame length for each mode (see "Frame Rate
* Adjustment (CSI-2)" in the datasheet)
* @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the
@ -163,8 +179,8 @@ enum imx274_mode {
* in Each Readout Drive Mode (CSI-2)" in the datasheet)
*/
struct imx274_frmfmt {
struct v4l2_frmsize_discrete size;
const struct reg_8 *init_regs;
unsigned int bin_ratio;
int min_frame_len;
int min_SHR;
int max_fps;
@ -215,31 +231,14 @@ static const struct reg_8 imx274_mode1_3840x2160_raw10[] = {
{0x3004, 0x01},
{0x3005, 0x01},
{0x3006, 0x00},
{0x3007, 0x02},
{0x3007, 0xa2},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x01},
{0x30F6, 0x07}, /* HMAX, 263 */
{0x30F7, 0x01}, /* HMAX */
{0x30dd, 0x01}, /* crop to 2160 */
{0x30de, 0x06},
{0x30df, 0x00},
{0x30e0, 0x12},
{0x30e1, 0x00},
{0x3037, 0x01}, /* to crop to 3840 */
{0x3038, 0x0c},
{0x3039, 0x00},
{0x303a, 0x0c},
{0x303b, 0x0f},
{0x30EE, 0x01},
{0x3130, 0x86},
{0x3131, 0x08},
{0x3132, 0x7E},
{0x3133, 0x08},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x16},
@ -273,32 +272,14 @@ static const struct reg_8 imx274_mode3_1920x1080_raw10[] = {
{0x3004, 0x02},
{0x3005, 0x21},
{0x3006, 0x00},
{0x3007, 0x11},
{0x3007, 0xb1},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x02},
{0x30F6, 0x04}, /* HMAX, 260 */
{0x30F7, 0x01}, /* HMAX */
{0x30dd, 0x01}, /* to crop to 1920x1080 */
{0x30de, 0x05},
{0x30df, 0x00},
{0x30e0, 0x04},
{0x30e1, 0x00},
{0x3037, 0x01},
{0x3038, 0x0c},
{0x3039, 0x00},
{0x303a, 0x0c},
{0x303b, 0x0f},
{0x30EE, 0x01},
{0x3130, 0x4E},
{0x3131, 0x04},
{0x3132, 0x46},
{0x3133, 0x04},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x1A},
@ -331,31 +312,14 @@ static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
{0x3004, 0x03},
{0x3005, 0x31},
{0x3006, 0x00},
{0x3007, 0x09},
{0x3007, 0xa9},
{0x3018, 0xA2}, /* output XVS, HVS */
{0x306B, 0x05},
{0x30E2, 0x03},
{0x30F6, 0x04}, /* HMAX, 260 */
{0x30F7, 0x01}, /* HMAX */
{0x30DD, 0x01},
{0x30DE, 0x07},
{0x30DF, 0x00},
{0x40E0, 0x04},
{0x30E1, 0x00},
{0x3030, 0xD4},
{0x3031, 0x02},
{0x3032, 0xD0},
{0x3033, 0x02},
{0x30EE, 0x01},
{0x3130, 0xE2},
{0x3131, 0x02},
{0x3132, 0xDE},
{0x3133, 0x02},
{0x3342, 0x0A},
{0x3343, 0x00},
{0x3344, 0x1B},
@ -498,7 +462,7 @@ static const struct reg_8 imx274_tp_regs[] = {
static const struct imx274_frmfmt imx274_formats[] = {
{
/* mode 1, 4K */
.size = {3840, 2160},
.bin_ratio = 1,
.init_regs = imx274_mode1_3840x2160_raw10,
.min_frame_len = 4550,
.min_SHR = 12,
@ -507,7 +471,7 @@ static const struct imx274_frmfmt imx274_formats[] = {
},
{
/* mode 3, 1080p */
.size = {1920, 1080},
.bin_ratio = 2,
.init_regs = imx274_mode3_1920x1080_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
@ -516,7 +480,7 @@ static const struct imx274_frmfmt imx274_formats[] = {
},
{
/* mode 5, 720p */
.size = {1280, 720},
.bin_ratio = 3,
.init_regs = imx274_mode5_1280x720_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
@ -547,7 +511,10 @@ struct imx274_ctrls {
* @pad: Media pad structure
* @client: Pointer to I2C client
* @ctrls: imx274 control structure
* @crop: rect to be captured
* @compose: compose rect, i.e. output resolution
* @format: V4L2 media bus frame format structure
* (width and height are in sync with the compose rect)
* @frame_rate: V4L2 frame rate structure
* @regmap: Pointer to regmap structure
* @reset_gpio: Pointer to reset gpio
@ -559,6 +526,7 @@ struct stimx274 {
struct media_pad pad;
struct i2c_client *client;
struct imx274_ctrls ctrls;
struct v4l2_rect crop;
struct v4l2_mbus_framefmt format;
struct v4l2_fract frame_interval;
struct regmap *regmap;
@ -567,6 +535,13 @@ struct stimx274 {
const struct imx274_frmfmt *mode;
};
#define IMX274_ROUND(dim, step, flags) \
((flags) & V4L2_SEL_FLAG_GE \
? roundup((dim), (step)) \
: ((flags) & V4L2_SEL_FLAG_LE \
? rounddown((dim), (step)) \
: rounddown((dim) + (step) / 2, (step))))
/*
* Function declaration
*/
@ -840,6 +815,114 @@ static int imx274_s_ctrl(struct v4l2_ctrl *ctrl)
return ret;
}
static int imx274_binning_goodness(struct stimx274 *imx274,
int w, int ask_w,
int h, int ask_h, u32 flags)
{
struct device *dev = &imx274->client->dev;
const int goodness = 100000;
int val = 0;
if (flags & V4L2_SEL_FLAG_GE) {
if (w < ask_w)
val -= goodness;
if (h < ask_h)
val -= goodness;
}
if (flags & V4L2_SEL_FLAG_LE) {
if (w > ask_w)
val -= goodness;
if (h > ask_h)
val -= goodness;
}
val -= abs(w - ask_w);
val -= abs(h - ask_h);
dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n",
__func__, ask_w, ask_h, w, h, val);
return val;
}
/**
* Helper function to change binning and set both compose and format.
*
* We have two entry points to change binning: set_fmt and
* set_selection(COMPOSE). Both have to compute the new output size
* and set it in both the compose rect and the frame format size. We
* also need to do the same things after setting cropping to restore
* 1:1 binning.
*
* This function contains the common code for these three cases, it
* has many arguments in order to accommodate the needs of all of
* them.
*
* Must be called with imx274->lock locked.
*
* @imx274: The device object
* @cfg: The pad config we are editing for TRY requests
* @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller
* @width: Input-output parameter: set to the desired width before
* the call, contains the chosen value after returning successfully
* @height: Input-output parameter for height (see @width)
* @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not
* available (when called from set_fmt)
*/
static int __imx274_change_compose(struct stimx274 *imx274,
struct v4l2_subdev_pad_config *cfg,
u32 which,
u32 *width,
u32 *height,
u32 flags)
{
struct device *dev = &imx274->client->dev;
const struct v4l2_rect *cur_crop;
struct v4l2_mbus_framefmt *tgt_fmt;
unsigned int i;
const struct imx274_frmfmt *best_mode = &imx274_formats[0];
int best_goodness = INT_MIN;
if (which == V4L2_SUBDEV_FORMAT_TRY) {
cur_crop = &cfg->try_crop;
tgt_fmt = &cfg->try_fmt;
} else {
cur_crop = &imx274->crop;
tgt_fmt = &imx274->format;
}
for (i = 0; i < ARRAY_SIZE(imx274_formats); i++) {
unsigned int ratio = imx274_formats[i].bin_ratio;
int goodness = imx274_binning_goodness(
imx274,
cur_crop->width / ratio, *width,
cur_crop->height / ratio, *height,
flags);
if (goodness >= best_goodness) {
best_goodness = goodness;
best_mode = &imx274_formats[i];
}
}
*width = cur_crop->width / best_mode->bin_ratio;
*height = cur_crop->height / best_mode->bin_ratio;
if (which == V4L2_SUBDEV_FORMAT_ACTIVE)
imx274->mode = best_mode;
dev_dbg(dev, "%s: selected %u:1 binning\n",
__func__, best_mode->bin_ratio);
tgt_fmt->width = *width;
tgt_fmt->height = *height;
tgt_fmt->field = V4L2_FIELD_NONE;
return 0;
}
/**
* imx274_get_fmt - Get the pad format
* @sd: Pointer to V4L2 Sub device structure
@ -878,45 +961,238 @@ static int imx274_set_fmt(struct v4l2_subdev *sd,
{
struct v4l2_mbus_framefmt *fmt = &format->format;
struct stimx274 *imx274 = to_imx274(sd);
struct i2c_client *client = imx274->client;
int index;
dev_dbg(&client->dev,
"%s: width = %d height = %d code = %d\n",
__func__, fmt->width, fmt->height, fmt->code);
int err = 0;
mutex_lock(&imx274->lock);
for (index = 0; index < ARRAY_SIZE(imx274_formats); index++) {
if (imx274_formats[index].size.width == fmt->width &&
imx274_formats[index].size.height == fmt->height)
break;
}
err = __imx274_change_compose(imx274, cfg, format->which,
&fmt->width, &fmt->height, 0);
if (index >= ARRAY_SIZE(imx274_formats)) {
/* default to first format */
index = 0;
}
if (err)
goto out;
imx274->mode = &imx274_formats[index];
if (fmt->width > IMX274_MAX_WIDTH)
fmt->width = IMX274_MAX_WIDTH;
if (fmt->height > IMX274_MAX_HEIGHT)
fmt->height = IMX274_MAX_HEIGHT;
fmt->width = fmt->width & (~IMX274_MASK_LSB_2_BITS);
fmt->height = fmt->height & (~IMX274_MASK_LSB_2_BITS);
/*
* __imx274_change_compose already set width and height in the
* applicable format, but we need to keep all other format
* values, so do a full copy here
*/
fmt->field = V4L2_FIELD_NONE;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
cfg->try_fmt = *fmt;
else
imx274->format = *fmt;
out:
mutex_unlock(&imx274->lock);
return err;
}
static int imx274_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct stimx274 *imx274 = to_imx274(sd);
const struct v4l2_rect *src_crop;
const struct v4l2_mbus_framefmt *src_fmt;
int ret = 0;
if (sel->pad != 0)
return -EINVAL;
if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = IMX274_MAX_WIDTH;
sel->r.height = IMX274_MAX_HEIGHT;
return 0;
}
if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
src_crop = &cfg->try_crop;
src_fmt = &cfg->try_fmt;
} else {
src_crop = &imx274->crop;
src_fmt = &imx274->format;
}
mutex_lock(&imx274->lock);
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
sel->r = *src_crop;
break;
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = src_crop->width;
sel->r.height = src_crop->height;
break;
case V4L2_SEL_TGT_COMPOSE:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = src_fmt->width;
sel->r.height = src_fmt->height;
break;
default:
ret = -EINVAL;
}
mutex_unlock(&imx274->lock);
return ret;
}
static int imx274_set_selection_crop(struct stimx274 *imx274,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct v4l2_rect *tgt_crop;
struct v4l2_rect new_crop;
bool size_changed;
/*
* h_step could be 12 or 24 depending on the binning. But we
* won't know the binning until we choose the mode later in
* __imx274_change_compose(). Thus let's be safe and use the
* most conservative value in all cases.
*/
const u32 h_step = 24;
new_crop.width = min_t(u32,
IMX274_ROUND(sel->r.width, h_step, sel->flags),
IMX274_MAX_WIDTH);
/* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */
if (new_crop.width < 144)
new_crop.width = 144;
new_crop.left = min_t(u32,
IMX274_ROUND(sel->r.left, h_step, 0),
IMX274_MAX_WIDTH - new_crop.width);
new_crop.height = min_t(u32,
IMX274_ROUND(sel->r.height, 2, sel->flags),
IMX274_MAX_HEIGHT);
new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0),
IMX274_MAX_HEIGHT - new_crop.height);
sel->r = new_crop;
if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
tgt_crop = &cfg->try_crop;
else
tgt_crop = &imx274->crop;
mutex_lock(&imx274->lock);
size_changed = (new_crop.width != tgt_crop->width ||
new_crop.height != tgt_crop->height);
/* __imx274_change_compose needs the new size in *tgt_crop */
*tgt_crop = new_crop;
/* if crop size changed then reset the output image size */
if (size_changed)
__imx274_change_compose(imx274, cfg, sel->which,
&new_crop.width, &new_crop.height,
sel->flags);
mutex_unlock(&imx274->lock);
return 0;
}
static int imx274_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct stimx274 *imx274 = to_imx274(sd);
if (sel->pad != 0)
return -EINVAL;
if (sel->target == V4L2_SEL_TGT_CROP)
return imx274_set_selection_crop(imx274, cfg, sel);
if (sel->target == V4L2_SEL_TGT_COMPOSE) {
int err;
mutex_lock(&imx274->lock);
err = __imx274_change_compose(imx274, cfg, sel->which,
&sel->r.width, &sel->r.height,
sel->flags);
mutex_unlock(&imx274->lock);
/*
* __imx274_change_compose already set width and
* height in set->r, we still need to set top-left
*/
if (!err) {
sel->r.top = 0;
sel->r.left = 0;
}
return err;
}
return -EINVAL;
}
static int imx274_apply_trimming(struct stimx274 *imx274)
{
u32 h_start;
u32 h_end;
u32 hmax;
u32 v_cut;
s32 v_pos;
u32 write_v_size;
u32 y_out_size;
int err;
h_start = imx274->crop.left + 12;
h_end = h_start + imx274->crop.width;
/* Use the minimum allowed value of HMAX */
/* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */
/* Note: 260 is the minimum HMAX in all implemented modes */
hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23);
/* invert v_pos if VFLIP */
v_pos = imx274->ctrls.vflip->cur.val ?
(-imx274->crop.top / 2) : (imx274->crop.top / 2);
v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2;
write_v_size = imx274->crop.height + 22;
y_out_size = imx274->crop.height + 14;
err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB,
h_start, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB,
h_end, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB,
v_cut, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB,
v_pos, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB,
write_v_size, 2);
if (!err)
err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB,
y_out_size, 2);
return err;
}
/**
* imx274_g_frame_interval - Get the frame interval
* @sd: Pointer to V4L2 Sub device structure
@ -1057,6 +1333,10 @@ static int imx274_s_stream(struct v4l2_subdev *sd, int on)
if (ret)
goto fail;
ret = imx274_apply_trimming(imx274);
if (ret)
goto fail;
/*
* update frame rate & expsoure. if the last mode is different,
* HMAX could be changed. As the result, frame rate & exposure
@ -1545,6 +1825,8 @@ fail:
static const struct v4l2_subdev_pad_ops imx274_pad_ops = {
.get_fmt = imx274_get_fmt,
.set_fmt = imx274_set_fmt,
.get_selection = imx274_get_selection,
.set_selection = imx274_set_selection,
};
static const struct v4l2_subdev_video_ops imx274_video_ops = {
@ -1590,8 +1872,10 @@ static int imx274_probe(struct i2c_client *client,
/* initialize format */
imx274->mode = &imx274_formats[IMX274_DEFAULT_MODE];
imx274->format.width = imx274->mode->size.width;
imx274->format.height = imx274->mode->size.height;
imx274->crop.width = IMX274_MAX_WIDTH;
imx274->crop.height = IMX274_MAX_HEIGHT;
imx274->format.width = imx274->crop.width / imx274->mode->bin_ratio;
imx274->format.height = imx274->crop.height / imx274->mode->bin_ratio;
imx274->format.field = V4L2_FIELD_NONE;
imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
imx274->format.colorspace = V4L2_COLORSPACE_SRGB;