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media: i2c: imx290: Convert V4L2_CID_VBLANK to read/write
The driver exposed V4L2_CID_VBLANK 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. V4L2_CID_VBLANK also sets the limits for the exposure control, therefore exposure ranges have to be updated when vblank changes (either via s_ctrl, or via changing mode). Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Alexander Stein <alexander.stein@ew.tq-group.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
parent
08a0061db7
commit
9fe4eee963
1 changed files with 48 additions and 10 deletions
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@ -49,6 +49,7 @@
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#define IMX290_BLKLEVEL IMX290_REG_16BIT(0x300a)
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#define IMX290_GAIN IMX290_REG_8BIT(0x3014)
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#define IMX290_VMAX IMX290_REG_24BIT(0x3018)
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#define IMX290_VMAX_MAX 0x3ffff
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#define IMX290_HMAX IMX290_REG_16BIT(0x301c)
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#define IMX290_HMAX_MAX 0xffff
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#define IMX290_SHS1 IMX290_REG_24BIT(0x3020)
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@ -109,6 +110,9 @@
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#define IMX290_PGCTRL_THRU BIT(1)
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#define IMX290_PGCTRL_MODE(n) ((n) << 4)
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/* Number of lines by which exposure must be less than VMAX */
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#define IMX290_EXPOSURE_OFFSET 2
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#define IMX290_VMAX_DEFAULT 1125
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#define IMX290_PIXEL_RATE 148500000
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@ -225,6 +229,7 @@ struct imx290 {
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struct v4l2_ctrl *link_freq;
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struct v4l2_ctrl *hblank;
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struct v4l2_ctrl *vblank;
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struct v4l2_ctrl *exposure;
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};
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static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
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@ -238,7 +243,6 @@ static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
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static const struct imx290_regval imx290_global_init_settings[] = {
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{ IMX290_CTRL_07, IMX290_WINMODE_1080P },
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{ IMX290_VMAX, IMX290_VMAX_DEFAULT },
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{ IMX290_EXTCK_FREQ, 0x2520 },
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{ IMX290_WINWV_OB, 12 },
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{ IMX290_WINPH, 0 },
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@ -664,6 +668,16 @@ static int imx290_setup_format(struct imx290 *imx290,
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/* ----------------------------------------------------------------------------
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* Controls
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*/
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static void imx290_exposure_update(struct imx290 *imx290,
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const struct imx290_mode *mode)
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{
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unsigned int exposure_max;
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exposure_max = imx290->vblank->val + mode->height -
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IMX290_EXPOSURE_OFFSET;
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__v4l2_ctrl_modify_range(imx290->exposure, 1, exposure_max, 1,
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exposure_max);
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}
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static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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@ -671,7 +685,7 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
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struct imx290, ctrls);
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const struct v4l2_mbus_framefmt *format;
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struct v4l2_subdev_state *state;
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int ret = 0;
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int ret = 0, vmax;
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/*
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* Return immediately for controls that don't need to be applied to the
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@ -680,6 +694,11 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
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if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
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return 0;
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if (ctrl->id == V4L2_CID_VBLANK) {
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/* Changing vblank changes the allowed range for exposure. */
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imx290_exposure_update(imx290, imx290->current_mode);
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}
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/* V4L2 controls values will be applied only when power is already up */
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if (!pm_runtime_get_if_in_use(imx290->dev))
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return 0;
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@ -692,9 +711,23 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
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ret = imx290_write(imx290, IMX290_GAIN, ctrl->val, NULL);
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break;
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case V4L2_CID_VBLANK:
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ret = imx290_write(imx290, IMX290_VMAX,
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ctrl->val + imx290->current_mode->height,
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NULL);
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/*
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* Due to the way that exposure is programmed in this sensor in
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* relation to VMAX, we have to reprogramme it whenever VMAX is
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* changed.
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* Update ctrl so that the V4L2_CID_EXPOSURE case can refer to
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* it.
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*/
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ctrl = imx290->exposure;
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fallthrough;
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case V4L2_CID_EXPOSURE:
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vmax = imx290->vblank->val + imx290->current_mode->height;
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ret = imx290_write(imx290, IMX290_SHS1,
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IMX290_VMAX_DEFAULT - ctrl->val - 1, NULL);
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vmax - ctrl->val - 1, NULL);
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break;
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case V4L2_CID_TEST_PATTERN:
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@ -751,13 +784,15 @@ static void imx290_ctrl_update(struct imx290 *imx290,
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{
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unsigned int hblank_min = mode->hmax_min - mode->width;
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unsigned int hblank_max = IMX290_HMAX_MAX - mode->width;
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unsigned int vblank = IMX290_VMAX_DEFAULT - mode->height;
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unsigned int vblank_min = IMX290_VMAX_DEFAULT - mode->height;
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unsigned int vblank_max = IMX290_VMAX_MAX - mode->height;
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__v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
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__v4l2_ctrl_modify_range(imx290->hblank, hblank_min, hblank_max, 1,
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hblank_min);
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__v4l2_ctrl_modify_range(imx290->vblank, vblank, vblank, 1, vblank);
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__v4l2_ctrl_modify_range(imx290->vblank, vblank_min, vblank_max, 1,
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vblank_min);
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}
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static int imx290_ctrl_init(struct imx290 *imx290)
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@ -787,9 +822,13 @@ static int imx290_ctrl_init(struct imx290 *imx290)
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v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
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V4L2_CID_ANALOGUE_GAIN, 0, 100, 1, 0);
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v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
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V4L2_CID_EXPOSURE, 1, IMX290_VMAX_DEFAULT - 2, 1,
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IMX290_VMAX_DEFAULT - 2);
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/*
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* Correct range will be determined through imx290_ctrl_update setting
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* V4L2_CID_VBLANK.
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*/
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imx290->exposure = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
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V4L2_CID_EXPOSURE, 1, 65535, 1,
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65535);
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/*
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* Set the link frequency, pixel rate, horizontal blanking and vertical
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@ -821,8 +860,6 @@ static int imx290_ctrl_init(struct imx290 *imx290)
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imx290->vblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
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V4L2_CID_VBLANK, 1, 1, 1, 1);
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if (imx290->vblank)
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imx290->vblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
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v4l2_ctrl_new_fwnode_properties(&imx290->ctrls, &imx290_ctrl_ops,
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&props);
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@ -1008,6 +1045,7 @@ static int imx290_set_fmt(struct v4l2_subdev *sd,
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imx290->current_mode = mode;
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imx290_ctrl_update(imx290, &fmt->format, mode);
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imx290_exposure_update(imx290, mode);
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}
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*format = fmt->format;
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