Hi Dave,
Am Freitag, 3. Februar 2023, 20:18:05 CET schrieb Dave Stevenson:
> The driver exposed V4L2_CID_HBLANK as a read only control to allow
> for exposure calculations and determination of the frame rate.
>
> Convert to a read/write control so that the frame rate can be
> controlled.
>
> Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
> drivers/media/i2c/imx290.c | 33 +++++++++++++++++++--------------
> 1 file changed, 19 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index 2abe4cdab819..74eafed15613 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -47,6 +47,7 @@
> #define IMX290_GAIN
IMX290_REG_8BIT(0x3014)
> #define IMX290_VMAX
IMX290_REG_24BIT(0x3018)
> #define IMX290_HMAX
IMX290_REG_16BIT(0x301c)
> +#define IMX290_HMAX_MAX 0xffff
> #define IMX290_SHS1
IMX290_REG_24BIT(0x3020)
> #define IMX290_WINWV_OB
IMX290_REG_8BIT(0x303a)
> #define IMX290_WINPV
IMX290_REG_16BIT(0x303c)
> @@ -183,7 +184,7 @@ struct imx290_regval {
> struct imx290_mode {
> u32 width;
> u32 height;
> - u32 hmax;
> + u32 hmax_min;
> u8 link_freq_index;
>
> const struct imx290_regval *data;
> @@ -426,7 +427,7 @@ static const struct imx290_mode imx290_modes_2lanes[] =
> { {
> .width = 1920,
> .height = 1080,
> - .hmax = 2200,
> + .hmax_min = 2200,
> .link_freq_index = FREQ_INDEX_1080P,
> .data = imx290_1080p_settings,
> .data_size = ARRAY_SIZE(imx290_1080p_settings),
> @@ -434,7 +435,7 @@ static const struct imx290_mode imx290_modes_2lanes[] =
> { {
> .width = 1280,
> .height = 720,
> - .hmax = 3300,
> + .hmax_min = 3300,
> .link_freq_index = FREQ_INDEX_720P,
> .data = imx290_720p_settings,
> .data_size = ARRAY_SIZE(imx290_720p_settings),
> @@ -445,7 +446,7 @@ static const struct imx290_mode imx290_modes_4lanes[] =
> { {
> .width = 1920,
> .height = 1080,
> - .hmax = 2200,
> + .hmax_min = 2200,
> .link_freq_index = FREQ_INDEX_1080P,
> .data = imx290_1080p_settings,
> .data_size = ARRAY_SIZE(imx290_1080p_settings),
> @@ -453,7 +454,7 @@ static const struct imx290_mode imx290_modes_4lanes[] =
> { {
> .width = 1280,
> .height = 720,
> - .hmax = 3300,
> + .hmax_min = 3300,
> .link_freq_index = FREQ_INDEX_720P,
> .data = imx290_720p_settings,
> .data_size = ARRAY_SIZE(imx290_720p_settings),
> @@ -707,6 +708,12 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
> }
> break;
>
> + case V4L2_CID_HBLANK:
> + ret = imx290_write(imx290, IMX290_HMAX,
> + ctrl->val + imx290->current_mode-
>width,
> + NULL);
> + break;
> +
> default:
> ret = -EINVAL;
> break;
> @@ -737,12 +744,14 @@ static void imx290_ctrl_update(struct imx290 *imx290,
> const struct v4l2_mbus_framefmt *format,
> const struct imx290_mode *mode)
> {
> - unsigned int hblank = mode->hmax - mode->width;
> + unsigned int hblank_min = mode->hmax_min - mode->width;
> + unsigned int hblank_max = IMX290_HMAX_MAX - mode->width;
> unsigned int vblank = IMX290_VMAX_DEFAULT - mode->height;
>
> __v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
>
> - __v4l2_ctrl_modify_range(imx290->hblank, hblank, hblank, 1, hblank);
> + __v4l2_ctrl_modify_range(imx290->hblank, hblank_min, hblank_max, 1,
> + hblank_min);
> __v4l2_ctrl_modify_range(imx290->vblank, vblank, vblank, 1, vblank);
> }
>
> @@ -799,10 +808,11 @@ static int imx290_ctrl_init(struct imx290 *imx290)
>
ARRAY_SIZE(imx290_test_pattern_menu) - 1,
> 0, 0, imx290_test_pattern_menu);
>
> + /*
> + * Actual range will be set from imx290_ctrl_update later in the
probe.
> + */
> imx290->hblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
> V4L2_CID_HBLANK, 1, 1, 1,
1);
> - if (imx290->hblank)
> - imx290->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>
> imx290->vblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
> V4L2_CID_VBLANK, 1, 1, 1,
1);
> @@ -871,11 +881,6 @@ static int imx290_start_streaming(struct imx290
> *imx290, return ret;
> }
>
> - ret = imx290_write(imx290, IMX290_HMAX, imx290->current_mode->hmax,
> - NULL);
> - if (ret)
> - return ret;
> -
> /* Apply customized values from user */
> ret = __v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
> if (ret) {
