Re: [PATCH 10/13] media: i2c: imx214: Implement vflip/hflip controls

From: Dave Stevenson
Date: Thu Sep 12 2024 - 11:19:18 EST

Next message: Mark Brown: "Re: (subset) [PATCH v7 00/16] Add audio support for the MediaTek Genio 350-evk board"
Previous message: Andy Shevchenko: "Re: [PATCH v5 3/3] drivers: iio: adc: add support for ad777x family"
In reply to: Ricardo Ribalda Delgado: "Re: [PATCH 10/13] media: i2c: imx214: Implement vflip/hflip controls"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi André

On Mon, 2 Sept 2024 at 22:54, André Apitzsch via B4 Relay
<devnull+git.apitzsch.eu@xxxxxxxxxx> wrote:
>
> From: André Apitzsch <git@xxxxxxxxxxx>
>
> The imx214 sensor supports horizontal and vertical flipping. Add
> appropriate controls to the driver.
>
> Signed-off-by: André Apitzsch <git@xxxxxxxxxxx>
> ---
> drivers/media/i2c/imx214.c | 73 +++++++++++++++++++++++++++++++++++++++++-----
> 1 file changed, 65 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
> index 733f55257585..4a1433728cd5 100644
> --- a/drivers/media/i2c/imx214.c
> +++ b/drivers/media/i2c/imx214.c
> @@ -30,7 +30,6 @@
> #define IMX214_DEFAULT_LINK_FREQ 480000000
> #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
> #define IMX214_FPS 30
> -#define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
>
> /* V-TIMING internal */
> #define IMX214_REG_FRM_LENGTH_LINES CCI_REG16(0x0340)
> @@ -186,6 +185,22 @@ static const char * const imx214_supply_name[] = {
>
> #define IMX214_NUM_SUPPLIES ARRAY_SIZE(imx214_supply_name)
>
> +/*
> + * The supported formats.
> + * This table MUST contain 4 entries per format, to cover the various flip
> + * combinations in the order
> + * - no flip
> + * - h flip
> + * - v flip
> + * - h&v flips
> + */
> +static const u32 imx214_mbus_formats[] = {
> + MEDIA_BUS_FMT_SRGGB10_1X10,
> + MEDIA_BUS_FMT_SGRBG10_1X10,
> + MEDIA_BUS_FMT_SGBRG10_1X10,
> + MEDIA_BUS_FMT_SBGGR10_1X10,
> +};
> +
> struct imx214 {
> struct device *dev;
> struct clk *xclk;
> @@ -202,6 +217,8 @@ struct imx214 {
> struct v4l2_ctrl *vblank;
> struct v4l2_ctrl *hblank;
> struct v4l2_ctrl *exposure;
> + struct v4l2_ctrl *vflip;
> + struct v4l2_ctrl *hflip;
> struct v4l2_ctrl *unit_size;
>
> struct regulator_bulk_data supplies[IMX214_NUM_SUPPLIES];
> @@ -339,7 +356,6 @@ static const struct cci_reg_sequence mode_table_common[] = {
>
> /* global setting */
> /* basic config */
> - { IMX214_REG_ORIENTATION, 0 },
> { IMX214_REG_MASK_CORR_FRAMES, IMX214_CORR_FRAMES_MASK },
> { IMX214_REG_FAST_STANDBY_CTRL, 1 },
> { IMX214_REG_LINE_LENGTH_PCK, IMX214_PPL_DEFAULT },
> @@ -518,11 +534,29 @@ static int __maybe_unused imx214_power_off(struct device *dev)
> return 0;
> }
>
> +/* Get bayer order based on flip setting. */
> +static u32 imx214_get_format_code(struct imx214 *imx214, u32 code)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(imx214_mbus_formats); i++)
> + if (imx214_mbus_formats[i] == code)
> + break;
> +
> + if (i >= ARRAY_SIZE(imx214_mbus_formats))
> + i = 0;
> +
> + i = (i & ~3) | (imx214->vflip->val ? 2 : 0) |
> + (imx214->hflip->val ? 1 : 0);
> +
> + return imx214_mbus_formats[i];
> +}
> +
> static void imx214_update_pad_format(struct imx214 *imx214,
> const struct imx214_mode *mode,
> struct v4l2_mbus_framefmt *fmt, u32 code)
> {
> - fmt->code = IMX214_MBUS_CODE;
> + fmt->code = imx214_get_format_code(imx214, code);
> fmt->width = mode->width;
> fmt->height = mode->height;
> fmt->field = V4L2_FIELD_NONE;
> @@ -538,10 +572,12 @@ static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_state *sd_state,
> struct v4l2_subdev_mbus_code_enum *code)
> {
> - if (code->index > 0)
> + struct imx214 *imx214 = to_imx214(sd);
> +
> + if (code->index >= (ARRAY_SIZE(imx214_mbus_formats) / 4))
> return -EINVAL;
>
> - code->code = IMX214_MBUS_CODE;
> + code->code = imx214_get_format_code(imx214, imx214_mbus_formats[code->index * 4]);
>
> return 0;
> }
> @@ -550,7 +586,11 @@ static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
> struct v4l2_subdev_state *sd_state,
> struct v4l2_subdev_frame_size_enum *fse)
> {
> - if (fse->code != IMX214_MBUS_CODE)
> + struct imx214 *imx214 = to_imx214(subdev);
> + u32 code;
> +
> + code = imx214_get_format_code(imx214, fse->code);
> + if (fse->code != code)
> return -EINVAL;
>
> if (fse->index >= ARRAY_SIZE(imx214_modes))
> @@ -708,6 +748,7 @@ static int imx214_entity_init_state(struct v4l2_subdev *subdev,
> struct v4l2_subdev_format fmt = { };
>
> fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
> + fmt.format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
> fmt.format.width = imx214_modes[0].width;
> fmt.format.height = imx214_modes[0].height;
>
> @@ -750,6 +791,11 @@ static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
> case V4L2_CID_EXPOSURE:
> cci_write(imx214->regmap, IMX214_REG_EXPOSURE, ctrl->val, &ret);
> break;
> + case V4L2_CID_HFLIP:
> + case V4L2_CID_VFLIP:
> + cci_write(imx214->regmap, IMX214_REG_ORIENTATION,
> + imx214->hflip->val | imx214->vflip->val << 1, &ret);
> + break;
> case V4L2_CID_VBLANK:
> cci_write(imx214->regmap, IMX214_REG_FRM_LENGTH_LINES,
> format->height + ctrl->val, &ret);
> @@ -788,7 +834,7 @@ static int imx214_ctrls_init(struct imx214 *imx214)
> return ret;
>
> ctrl_hdlr = &imx214->ctrls;
> - ret = v4l2_ctrl_handler_init(&imx214->ctrls, 8);
> + ret = v4l2_ctrl_handler_init(&imx214->ctrls, 10);
> if (ret)
> return ret;
>
> @@ -825,6 +871,16 @@ static int imx214_ctrls_init(struct imx214 *imx214)
> IMX214_EXPOSURE_STEP,
> exposure_def);
>
> + imx214->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx214_ctrl_ops,
> + V4L2_CID_HFLIP, 0, 1, 1, 0);
> + if (imx214->hflip)
> + imx214->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> +
> + imx214->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx214_ctrl_ops,
> + V4L2_CID_VFLIP, 0, 1, 1, 0);
> + if (imx214->vflip)
> + imx214->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
> +

A minor optimisation.
Currently a VIDIOC_S_EXT_CTRLS with both HFLIP and VFLIP in the list
will call your set_ctrl function twice, which gives a redundant update
to the register.
Define the two controls as a cluster via v4l2_ctrl_cluster(), and
you'll only get called once.

See ccs-core.c or imx290.c for an example, and docs at
https://www.kernel.org/doc/html/latest/driver-api/media/v4l2-controls.html#control-clusters

Dave

> imx214->unit_size = v4l2_ctrl_new_std_compound(ctrl_hdlr,
> NULL,
> V4L2_CID_UNIT_CELL_SIZE,
> @@ -1034,6 +1090,7 @@ static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
> struct v4l2_subdev_state *sd_state,
> struct v4l2_subdev_frame_interval_enum *fie)
> {
> + struct imx214 *imx214 = to_imx214(subdev);
> const struct imx214_mode *mode;
>
> if (fie->index != 0)
> @@ -1043,7 +1100,7 @@ static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
> ARRAY_SIZE(imx214_modes), width, height,
> fie->width, fie->height);
>
> - fie->code = IMX214_MBUS_CODE;
> + fie->code = imx214_get_format_code(imx214, fie->code);
> fie->width = mode->width;
> fie->height = mode->height;
> fie->interval.numerator = 1;
>
> --
> 2.46.0
>
>
>

Next message: Mark Brown: "Re: (subset) [PATCH v7 00/16] Add audio support for the MediaTek Genio 350-evk board"
Previous message: Andy Shevchenko: "Re: [PATCH v5 3/3] drivers: iio: adc: add support for ad777x family"
In reply to: Ricardo Ribalda Delgado: "Re: [PATCH 10/13] media: i2c: imx214: Implement vflip/hflip controls"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]