From 08cc1dcf1437d65dbb36dda27db29ec3a689101f Mon Sep 17 00:00:00 2001 From: David Plowman Date: Mon, 22 Nov 2021 13:10:39 +0000 Subject: [PATCH] media: i2c: ov5647: Support HFLIP and VFLIP Add these missing V4L2 controls. Tested binned and full resolution modes in all four orientations using Raspberry Pi running libcamera. Signed-off-by: David Plowman --- drivers/media/i2c/ov5647.c | 76 +++++++++++++++++++++++++++++++++++--- 1 file changed, 70 insertions(+), 6 deletions(-) --- a/drivers/media/i2c/ov5647.c +++ b/drivers/media/i2c/ov5647.c @@ -54,6 +54,8 @@ #define OV5647_REG_GAIN_LO 0x350b #define OV5647_REG_VTS_HI 0x380e #define OV5647_REG_VTS_LO 0x380f +#define OV5647_REG_VFLIP 0x3820 +#define OV5647_REG_HFLIP 0x3821 #define OV5647_REG_FRAME_OFF_NUMBER 0x4202 #define OV5647_REG_MIPI_CTRL00 0x4800 #define OV5647_REG_MIPI_CTRL14 0x4814 @@ -108,6 +110,8 @@ struct ov5647 { struct v4l2_ctrl *hblank; struct v4l2_ctrl *vblank; struct v4l2_ctrl *exposure; + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; bool streaming; }; @@ -136,7 +140,7 @@ static struct regval_list ov5647_2592x19 {0x3036, 0x69}, {0x303c, 0x11}, {0x3106, 0xf5}, - {0x3821, 0x06}, + {0x3821, 0x00}, {0x3820, 0x00}, {0x3827, 0xec}, {0x370c, 0x03}, @@ -225,7 +229,7 @@ static struct regval_list ov5647_1080p30 {0x3036, 0x62}, {0x303c, 0x11}, {0x3106, 0xf5}, - {0x3821, 0x06}, + {0x3821, 0x00}, {0x3820, 0x00}, {0x3827, 0xec}, {0x370c, 0x03}, @@ -389,7 +393,7 @@ static struct regval_list ov5647_2x2binn {0x4800, 0x24}, {0x3503, 0x03}, {0x3820, 0x41}, - {0x3821, 0x07}, + {0x3821, 0x01}, {0x350a, 0x00}, {0x350b, 0x10}, {0x3500, 0x00}, @@ -405,7 +409,7 @@ static struct regval_list ov5647_640x480 {0x3035, 0x11}, {0x3036, 0x46}, {0x303c, 0x11}, - {0x3821, 0x07}, + {0x3821, 0x01}, {0x3820, 0x41}, {0x370c, 0x03}, {0x3612, 0x59}, @@ -946,6 +950,25 @@ static const struct v4l2_subdev_video_op .s_stream = ov5647_s_stream, }; +/* This function returns the mbus code for the current settings of the + HFLIP and VFLIP controls. */ + +static u32 ov5647_get_mbus_code(struct v4l2_subdev *sd) +{ + struct ov5647 *sensor = to_sensor(sd); + /* The control values are only 0 or 1. */ + int index = sensor->hflip->val | (sensor->vflip->val << 1); + + static const u32 codes[4] = { + MEDIA_BUS_FMT_SGBRG10_1X10, + MEDIA_BUS_FMT_SBGGR10_1X10, + MEDIA_BUS_FMT_SRGGB10_1X10, + MEDIA_BUS_FMT_SGRBG10_1X10 + }; + + return codes[index]; +} + static int ov5647_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) @@ -953,7 +976,7 @@ static int ov5647_enum_mbus_code(struct if (code->index > 0) return -EINVAL; - code->code = MEDIA_BUS_FMT_SBGGR10_1X10; + code->code = ov5647_get_mbus_code(sd); return 0; } @@ -964,7 +987,7 @@ static int ov5647_enum_frame_size(struct { const struct v4l2_mbus_framefmt *fmt; - if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 || + if (fse->code != ov5647_get_mbus_code(sd) || fse->index >= ARRAY_SIZE(ov5647_modes)) return -EINVAL; @@ -997,6 +1020,8 @@ static int ov5647_get_pad_fmt(struct v4l } *fmt = *sensor_format; + /* The code we pass back must reflect the current h/vflips. */ + fmt->code = ov5647_get_mbus_code(sd); mutex_unlock(&sensor->lock); return 0; @@ -1044,6 +1069,8 @@ static int ov5647_set_pad_fmt(struct v4l exposure_def); } *fmt = mode->format; + /* The code we pass back must reflect the current h/vflips. */ + fmt->code = ov5647_get_mbus_code(sd); mutex_unlock(&sensor->lock); return 0; @@ -1219,6 +1246,25 @@ static int ov5647_s_exposure(struct v4l2 return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4); } +static int ov5647_s_flip( struct v4l2_subdev *sd, u16 reg, u32 ctrl_val) +{ + int ret; + u8 reg_val; + + /* Set or clear bit 1 and leave everything else alone. */ + ret = ov5647_read(sd, reg, ®_val); + if (ret == 0) { + if (ctrl_val) + reg_val |= 2; + else + reg_val &= ~2; + + ret = ov5647_write(sd, reg, reg_val); + } + + return ret; +} + static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl) { struct ov5647 *sensor = container_of(ctrl->handler, @@ -1277,6 +1323,14 @@ static int ov5647_s_ctrl(struct v4l2_ctr /* Read-only, but we adjust it based on mode. */ break; + case V4L2_CID_HFLIP: + /* There's an in-built hflip in the sensor, so account for that here. */ + ov5647_s_flip(sd, OV5647_REG_HFLIP, !ctrl->val); + break; + case V4L2_CID_VFLIP: + ov5647_s_flip(sd, OV5647_REG_VFLIP, ctrl->val); + break; + default: dev_info(&client->dev, "Control (id:0x%x, val:0x%x) not supported\n", @@ -1343,6 +1397,16 @@ static int ov5647_init_controls(struct o sensor->mode->vts - sensor->mode->format.height); + sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + if (sensor->hflip) + sensor->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + + sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + if (sensor->vflip) + sensor->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; + v4l2_fwnode_device_parse(dev, &props); v4l2_ctrl_new_fwnode_properties(&sensor->ctrls, &ov5647_ctrl_ops,