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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0715-media-i2c-imx477-Add-support-for-adaptive-frame-cont.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0715-media-i2c-imx477-Add-support-for-adaptive-frame-cont.patch182
1 files changed, 0 insertions, 182 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0715-media-i2c-imx477-Add-support-for-adaptive-frame-cont.patch b/target/linux/bcm27xx/patches-5.4/950-0715-media-i2c-imx477-Add-support-for-adaptive-frame-cont.patch
deleted file mode 100644
index 1da5dea326..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0715-media-i2c-imx477-Add-support-for-adaptive-frame-cont.patch
+++ /dev/null
@@ -1,182 +0,0 @@
-From 69f1022fc3c155f8cd5cf7dacaf283b1778835f3 Mon Sep 17 00:00:00 2001
-From: Naushir Patuck <naush@raspberrypi.com>
-Date: Fri, 8 May 2020 09:41:17 +0100
-Subject: [PATCH] media: i2c: imx477: Add support for adaptive frame
- control
-
-Use V4L2_CID_EXPOSURE_AUTO_PRIORITY to control if the driver should
-automatically adjust the sensor frame length based on exposure time,
-allowing variable frame rates and longer exposures.
-
-Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
----
- drivers/media/i2c/imx477.c | 113 +++++++++++++++++++++++++++++--------
- 1 file changed, 91 insertions(+), 22 deletions(-)
-
---- a/drivers/media/i2c/imx477.c
-+++ b/drivers/media/i2c/imx477.c
-@@ -1082,6 +1082,8 @@ struct imx477 {
- struct v4l2_ctrl *hflip;
- struct v4l2_ctrl *vblank;
- struct v4l2_ctrl *hblank;
-+ /* This ctrl allows automatic variable framerate */
-+ struct v4l2_ctrl *exposure_auto;
-
- /* Current mode */
- const struct imx477_mode *mode;
-@@ -1278,6 +1280,72 @@ static int imx477_open(struct v4l2_subde
- return 0;
- }
-
-+static int imx477_set_exposure(struct imx477 *imx477, unsigned int val)
-+{
-+ int ret;
-+
-+ ret = imx477_write_reg(imx477, IMX477_REG_EXPOSURE,
-+ IMX477_REG_VALUE_16BIT, val);
-+
-+ /* Setup the frame length in the case of auto framerate mode. */
-+ if (imx477->exposure_auto->val) {
-+ unsigned int frame_length, frame_length_max, frame_length_min;
-+
-+ frame_length_min = imx477->vblank->minimum +
-+ imx477->mode->height;
-+ frame_length_max = imx477->vblank->maximum +
-+ imx477->mode->height;
-+ frame_length = max(frame_length_min,
-+ val + IMX477_EXPOSURE_OFFSET);
-+ frame_length = min(frame_length_max, frame_length);
-+ ret += imx477_write_reg(imx477, IMX477_REG_FRAME_LENGTH,
-+ IMX477_REG_VALUE_16BIT, frame_length);
-+ }
-+
-+ return ret;
-+}
-+
-+static void imx477_adjust_exposure_range(struct imx477 *imx477,
-+ struct v4l2_ctrl *ctrl)
-+{
-+ int exposure_max, exposure_def;
-+
-+ if (ctrl->id == V4L2_CID_VBLANK || !ctrl->val) {
-+ /*
-+ * Either VBLANK has been changed or auto framerate
-+ * adjusting has been disabled. Honour the VBLANK limits
-+ * when setting exposure.
-+ */
-+ exposure_max = imx477->mode->height + imx477->vblank->val -
-+ IMX477_EXPOSURE_OFFSET;
-+
-+ if (ctrl->id == V4L2_CID_EXPOSURE_AUTO_PRIORITY) {
-+ /*
-+ * Allow VBLANK adjustments since the driver is not
-+ * handling frame length control automatically.
-+ */
-+ __v4l2_ctrl_grab(imx477->vblank, false);
-+ }
-+ } else {
-+ /*
-+ * Auto framerate adjusting has been enabled. VBLANK
-+ * ctrl has been disabled and exposure can ramp up
-+ * to the maximum allowable value.
-+ */
-+ exposure_max = IMX477_EXPOSURE_MAX;
-+ /*
-+ * Do not allow VBLANK adjustments if the driver is
-+ * handling it frame length control automatically.
-+ */
-+ __v4l2_ctrl_grab(imx477->vblank, true);
-+ }
-+
-+ exposure_def = min(exposure_max, imx477->exposure->val);
-+ __v4l2_ctrl_modify_range(imx477->exposure, imx477->exposure->minimum,
-+ exposure_max, imx477->exposure->step,
-+ exposure_def);
-+}
-+
- static int imx477_set_ctrl(struct v4l2_ctrl *ctrl)
- {
- struct imx477 *imx477 =
-@@ -1285,17 +1353,13 @@ static int imx477_set_ctrl(struct v4l2_c
- struct i2c_client *client = v4l2_get_subdevdata(&imx477->sd);
- int ret = 0;
-
-- if (ctrl->id == V4L2_CID_VBLANK) {
-- int exposure_max, exposure_def;
--
-- /* Update max exposure while meeting expected vblanking */
-- exposure_max = imx477->mode->height + ctrl->val -
-- IMX477_EXPOSURE_OFFSET;
-- exposure_def = min(exposure_max, imx477->exposure->val);
-- __v4l2_ctrl_modify_range(imx477->exposure,
-- imx477->exposure->minimum,
-- exposure_max, imx477->exposure->step,
-- exposure_def);
-+ if (ctrl->id == V4L2_CID_VBLANK ||
-+ ctrl->id == V4L2_CID_EXPOSURE_AUTO_PRIORITY) {
-+ /*
-+ * These controls may change the limits of usable exposure,
-+ * so check and adjust if necessary.
-+ */
-+ imx477_adjust_exposure_range(imx477, ctrl);
- }
-
- /*
-@@ -1311,8 +1375,14 @@ static int imx477_set_ctrl(struct v4l2_c
- IMX477_REG_VALUE_16BIT, ctrl->val);
- break;
- case V4L2_CID_EXPOSURE:
-- ret = imx477_write_reg(imx477, IMX477_REG_EXPOSURE,
-- IMX477_REG_VALUE_16BIT, ctrl->val);
-+ ret = imx477_set_exposure(imx477, ctrl->val);
-+ break;
-+ case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
-+ /*
-+ * imx477_set_exposure() will recalculate the frame length
-+ * to adjust the framerate to match the exposure.
-+ */
-+ ret = imx477_set_exposure(imx477, imx477->exposure->val);
- break;
- case V4L2_CID_DIGITAL_GAIN:
- ret = imx477_write_reg(imx477, IMX477_REG_DIGITAL_GAIN,
-@@ -1510,9 +1580,8 @@ unsigned int imx477_get_frame_length(con
-
- static void imx477_set_framing_limits(struct imx477 *imx477)
- {
-+ unsigned int frm_length_min, frm_length_default, hblank;
- const struct imx477_mode *mode = imx477->mode;
-- unsigned int frm_length_min, frm_length_default;
-- unsigned int exposure_max, exposure_def, hblank;
-
- frm_length_min = imx477_get_frame_length(mode, &mode->timeperframe_min);
- frm_length_default =
-@@ -1522,15 +1591,10 @@ static void imx477_set_framing_limits(st
- __v4l2_ctrl_modify_range(imx477->vblank, frm_length_min - mode->height,
- IMX477_FRAME_LENGTH_MAX - mode->height,
- 1, frm_length_default - mode->height);
-+
-+ /* Setting this will adjust the exposure limits as well. */
- __v4l2_ctrl_s_ctrl(imx477->vblank, frm_length_default - mode->height);
-
-- /* Update max exposure while meeting expected vblanking */
-- exposure_max = IMX477_FRAME_LENGTH_MAX - IMX477_EXPOSURE_OFFSET;
-- exposure_def = frm_length_default - mode->height -
-- IMX477_EXPOSURE_OFFSET;
-- __v4l2_ctrl_modify_range(imx477->exposure, imx477->exposure->minimum,
-- exposure_max, imx477->exposure->step,
-- exposure_def);
- /*
- * Currently PPL is fixed to the mode specified value, so hblank
- * depends on mode->width only, and is not changeable in any
-@@ -1939,6 +2003,11 @@ static int imx477_init_controls(struct i
- IMX477_DGTL_GAIN_MIN, IMX477_DGTL_GAIN_MAX,
- IMX477_DGTL_GAIN_STEP, IMX477_DGTL_GAIN_DEFAULT);
-
-+ imx477->exposure_auto =
-+ v4l2_ctrl_new_std(ctrl_hdlr, &imx477_ctrl_ops,
-+ V4L2_CID_EXPOSURE_AUTO_PRIORITY,
-+ 0, 1, 1, 0);
-+
- imx477->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx477_ctrl_ops,
- V4L2_CID_HFLIP, 0, 1, 1, 0);
- if (imx477->hflip)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 01:55:41 +0000