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 set_fmt callback chooses among these 3 configurations the one that matches the requested format. Adding support to VIDIOC_SUBDEV_G_SELECTION and VIDIOC_SUBDEV_S_SELECTION involved a complete rewrite of set_fmt, which now chooses the most appropriate binning based on the ratio between the previously-set cropping size and the format size being requested. Note that the names in enum imx274_mode change from being resolution-based to being binning-based. 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 anny misunderstanding. Signed-off-by: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx> --- Changed v1 -> v2: - add "media: " prefix to commit message --- drivers/media/i2c/imx274.c | 266 ++++++++++++++++++++++++++++++++------------- 1 file changed, 192 insertions(+), 74 deletions(-) diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c index b6c54712f2aa..ceb5b3e498c6 100644 --- a/drivers/media/i2c/imx274.c +++ b/drivers/media/i2c/imx274.c @@ -19,6 +19,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/kernel.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio.h> @@ -74,7 +75,7 @@ */ #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) -#define IMX274_DEFAULT_MODE IMX274_MODE_3840X2160 +#define IMX274_DEFAULT_MODE IMX274_MODE_BINNING_OFF #define IMX274_MAX_WIDTH (3840) #define IMX274_MAX_HEIGHT (2160) #define IMX274_MAX_FRAME_RATE (120) @@ -111,6 +112,20 @@ #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 */ @@ -141,9 +156,9 @@ static const struct regmap_config imx274_regmap_config = { }; enum imx274_mode { - IMX274_MODE_3840X2160, - IMX274_MODE_1920X1080, - IMX274_MODE_1280X720, + IMX274_MODE_BINNING_OFF, + IMX274_MODE_BINNING_2_1, + IMX274_MODE_BINNING_3_1, }; /* @@ -215,31 +230,14 @@ 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}, @@ -273,7 +271,7 @@ static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { {0x3004, 0x02}, {0x3005, 0x21}, {0x3006, 0x00}, - {0x3007, 0x11}, + {0x3007, 0xb1}, {0x3018, 0xA2}, /* output XVS, HVS */ @@ -283,22 +281,7 @@ static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { {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}, @@ -331,7 +314,7 @@ static const struct reg_8 imx274_mode5_1280x720_raw10[] = { {0x3004, 0x03}, {0x3005, 0x31}, {0x3006, 0x00}, - {0x3007, 0x09}, + {0x3007, 0xa9}, {0x3018, 0xA2}, /* output XVS, HVS */ @@ -341,21 +324,7 @@ static const struct reg_8 imx274_mode5_1280x720_raw10[] = { {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}, @@ -561,6 +530,7 @@ struct stimx274 { struct imx274_ctrls ctrls; struct v4l2_mbus_framefmt format; struct v4l2_fract frame_interval; + struct v4l2_rect crop; struct regmap *regmap; struct gpio_desc *reset_gpio; struct mutex lock; /* mutex lock for operations */ @@ -901,36 +871,30 @@ 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; + struct device *dev = &imx274->client->dev; + unsigned int ratio; /* Binning ratio */ - dev_dbg(&client->dev, - "%s: width = %d height = %d code = %d\n", - __func__, fmt->width, fmt->height, fmt->code); + dev_dbg(dev, "%s: request of %dx%d (%s)\n", + __func__, fmt->width, fmt->height, + V4L2_SUBDEV_FORMAT_ACTIVE ? "ACTIVE" : "TRY"); 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) + /* Find ratio (maximize output resolution). Fallback to 1:1. */ + for (ratio = 3; ratio > 1; ratio--) + if (fmt->width <= DIV_ROUND_UP(imx274->crop.width, ratio) && + fmt->height <= DIV_ROUND_UP(imx274->crop.height, ratio)) break; - } - - if (index >= ARRAY_SIZE(imx274_formats)) { - /* default to first format */ - index = 0; - } - imx274->mode = &imx274_formats[index]; + imx274->mode = &imx274_formats[ratio - 1]; - 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); + fmt->width = imx274->crop.width / ratio; + fmt->height = imx274->crop.height / ratio; fmt->field = V4L2_FIELD_NONE; + dev_dbg(dev, "%s: adjusted to %dx%d (%d:1 binning)\n", + __func__, fmt->width, fmt->height, ratio); + if (format->which == V4L2_SUBDEV_FORMAT_TRY) cfg->try_fmt = *fmt; else @@ -940,6 +904,152 @@ static int imx274_set_fmt(struct v4l2_subdev *sd, return 0; } +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); + + if (sel->pad != 0) + return -EINVAL; + + switch (sel->target) { + case 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; + case V4L2_SEL_TGT_CROP: + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + mutex_lock(&imx274->lock); + sel->r = imx274->crop; + mutex_unlock(&imx274->lock); + } else { + sel->r = cfg->try_crop; + } + return 0; + default: + return -EINVAL; + } + + 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); + struct device *dev = &imx274->client->dev; + struct v4l2_mbus_framefmt *tgt_fmt; + struct v4l2_rect *tgt_crop; + struct v4l2_rect new_crop; + + /* + * 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_set_fmt(). Thus let's be safe and use the most + * conservative value in all cases. + */ + const int h_step = 24; + + dev_dbg(dev, "%s: request of (%d,%d)%dx%d (%s)\n", __func__, + sel->r.left, sel->r.top, sel->r.width, sel->r.height, + V4L2_SUBDEV_FORMAT_ACTIVE ? "ACTIVE" : "TRY"); + + if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != 0) + return -EINVAL; + + new_crop.width = rounddown(min_t(u32, sel->r.width, IMX274_MAX_WIDTH), + h_step); + + /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ + if (new_crop.width < 144) + new_crop.width = 144; + + new_crop.left = min_t(u32, roundup(sel->r.left, h_step), + IMX274_MAX_WIDTH - new_crop.width); + + new_crop.height = + ALIGN(min_t(u32, sel->r.height, IMX274_MAX_HEIGHT), 2); + + new_crop.top = min_t(u32, ALIGN(sel->r.top, 2), + IMX274_MAX_HEIGHT - new_crop.height); + + dev_dbg(dev, "%s: adjusted to (%d,%d)%dx%d", __func__, + new_crop.left, new_crop.top, new_crop.width, new_crop.height); + + if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { + tgt_crop = &cfg->try_crop; + tgt_fmt = &cfg->try_fmt; + } else { + tgt_crop = &imx274->crop; + tgt_fmt = &imx274->format; + } + + mutex_lock(&imx274->lock); + + if (new_crop.width != tgt_crop->width || + new_crop.height != tgt_crop->height) { + /* crop size changed, reset the output image size */ + tgt_fmt->width = new_crop.width; + tgt_fmt->height = new_crop.height; + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) + imx274->mode = &imx274_formats[IMX274_MODE_BINNING_OFF]; + } + + *tgt_crop = new_crop; + + mutex_unlock(&imx274->lock); + + sel->r = new_crop; + + return 0; +} + +static int imx274_set_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; + struct reg_8 regs[17]; + + 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; + + prepare_reg(®s[0], IMX274_HMAX_REG_LSB, hmax, 16); + prepare_reg(®s[2], IMX274_HTRIM_EN_REG, 1, 1); + prepare_reg(®s[3], IMX274_HTRIM_START_REG_LSB, h_start, 13); + prepare_reg(®s[5], IMX274_HTRIM_END_REG_LSB, h_end, 13); + + prepare_reg(®s[7], IMX274_VWIDCUTEN_REG, 1, 1); + prepare_reg(®s[8], IMX274_VWIDCUT_REG_LSB, v_cut, 11); + prepare_reg(®s[10], IMX274_VWINPOS_REG_LSB, v_pos, 12); + prepare_reg(®s[12], IMX274_WRITE_VSIZE_REG_LSB, write_v_size, 13); + prepare_reg(®s[14], IMX274_Y_OUT_SIZE_REG_LSB, y_out_size, 13); + + regs[16].addr = IMX274_TABLE_END; + + return imx274_write_table(imx274, regs); +} + /** * imx274_g_frame_interval - Get the frame interval * @sd: Pointer to V4L2 Sub device structure @@ -1080,6 +1190,10 @@ static int imx274_s_stream(struct v4l2_subdev *sd, int on) if (ret) goto fail; + ret = imx274_set_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 @@ -1589,6 +1703,8 @@ static int imx274_set_frame_interval(struct stimx274 *priv, 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 = { @@ -1641,6 +1757,8 @@ static int imx274_probe(struct i2c_client *client, imx274->format.colorspace = V4L2_COLORSPACE_SRGB; imx274->frame_interval.numerator = 1; imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; + imx274->crop.width = imx274->mode->size.width; + imx274->crop.height = imx274->mode->size.height; /* initialize regmap */ imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); -- 2.7.4
