When the analog binning mode is used for high framerate operation, the pixel rate is effectively doubled. Account for this when setting up the pixel clock rate, and applying the vblank and exposure controls. The previous logic only used analog binning for RAW8, but normal binning limits the framerate on RAW10 480p [1]. So with this patch we switch to using special binning (with 2x pixel rate) wherever possible. [1]: https://github.com/raspberrypi/linux/issues/5493 Co-developed-by: Naushir Patuck <naush@xxxxxxxxxxxxxxx> Signed-off-by: Naushir Patuck <naush@xxxxxxxxxxxxxxx> Co-developed-by: Vinay Varma <varmavinaym@xxxxxxxxx> Signed-off-by: Vinay Varma <varmavinaym@xxxxxxxxx> Signed-off-by: Jai Luthra <jai.luthra@xxxxxxxxxxxxxxxx> --- drivers/media/i2c/imx219.c | 80 +++++++++++++++++++++++++++++++--------------- 1 file changed, 54 insertions(+), 26 deletions(-) diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c index 418f88386659d494ff674d64ed69b8441d1ee2cd..f97abcc5703ea32f1d6f19a4c0a671a7e978a974 100644 --- a/drivers/media/i2c/imx219.c +++ b/drivers/media/i2c/imx219.c @@ -296,13 +296,13 @@ static const struct imx219_mode supported_modes[] = { .fll_def = 1763, }, { - /* 2x2 binned 30fps mode */ + /* 2x2 binned 60fps mode */ .width = 1640, .height = 1232, .fll_def = 1707, }, { - /* 640x480 30fps mode */ + /* 640x480 60fps mode */ .width = 640, .height = 480, .fll_def = 1707, @@ -357,6 +357,45 @@ static u32 imx219_get_format_code(struct imx219 *imx219, u32 code) return imx219_mbus_formats[i]; } +static void imx219_get_binning(struct imx219 *imx219, u8 *bin_h, u8 *bin_v) +{ + struct v4l2_subdev_state *state = + v4l2_subdev_get_locked_active_state(&imx219->sd); + const struct v4l2_mbus_framefmt *format = + v4l2_subdev_state_get_format(state, 0); + const struct v4l2_rect *crop = v4l2_subdev_state_get_crop(state, 0); + u32 hbin = crop->width / format->width; + u32 vbin = crop->height / format->height; + + *bin_h = IMX219_BINNING_NONE; + *bin_v = IMX219_BINNING_NONE; + + /* + * Use analog binning only if both dimensions are binned, as it crops + * the other dimension. + */ + if (hbin == 2 && vbin == 2) { + *bin_h = IMX219_BINNING_X2_ANALOG; + *bin_v = IMX219_BINNING_X2_ANALOG; + + return; + } + + if (hbin == 2) + *bin_h = IMX219_BINNING_X2; + if (vbin == 2) + *bin_v = IMX219_BINNING_X2; +} + +static inline u32 imx219_get_rate_factor(struct imx219 *imx219) +{ + u8 bin_h, bin_v; + + imx219_get_binning(imx219, &bin_h, &bin_v); + + return (bin_h & bin_v) == IMX219_BINNING_X2_ANALOG ? 2 : 1; +} + /* ----------------------------------------------------------------------------- * Controls */ @@ -368,10 +407,12 @@ static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); const struct v4l2_mbus_framefmt *format; struct v4l2_subdev_state *state; + u32 rate_factor; int ret = 0; state = v4l2_subdev_get_locked_active_state(&imx219->sd); format = v4l2_subdev_state_get_format(state, 0); + rate_factor = imx219_get_rate_factor(imx219); if (ctrl->id == V4L2_CID_VBLANK) { int exposure_max, exposure_def; @@ -400,7 +441,7 @@ static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) break; case V4L2_CID_EXPOSURE: cci_write(imx219->regmap, IMX219_REG_EXPOSURE, - ctrl->val, &ret); + ctrl->val / rate_factor, &ret); break; case V4L2_CID_DIGITAL_GAIN: cci_write(imx219->regmap, IMX219_REG_DIGITAL_GAIN, @@ -417,7 +458,7 @@ static int imx219_set_ctrl(struct v4l2_ctrl *ctrl) break; case V4L2_CID_VBLANK: cci_write(imx219->regmap, IMX219_REG_FRM_LENGTH_A, - format->height + ctrl->val, &ret); + (format->height + ctrl->val) / rate_factor, &ret); break; case V4L2_CID_HBLANK: cci_write(imx219->regmap, IMX219_REG_LINE_LENGTH_A, @@ -589,7 +630,7 @@ static int imx219_set_framefmt(struct imx219 *imx219, const struct v4l2_mbus_framefmt *format; const struct v4l2_rect *crop; unsigned int bpp; - u64 bin_h, bin_v; + u8 bin_h, bin_v; int ret = 0; format = v4l2_subdev_state_get_format(state, 0); @@ -602,7 +643,6 @@ static int imx219_set_framefmt(struct imx219 *imx219, case MEDIA_BUS_FMT_SBGGR8_1X8: bpp = 8; break; - case MEDIA_BUS_FMT_SRGGB10_1X10: case MEDIA_BUS_FMT_SGRBG10_1X10: case MEDIA_BUS_FMT_SGBRG10_1X10: @@ -621,26 +661,7 @@ static int imx219_set_framefmt(struct imx219 *imx219, cci_write(imx219->regmap, IMX219_REG_Y_ADD_END_A, crop->top - IMX219_PIXEL_ARRAY_TOP + crop->height - 1, &ret); - switch (crop->width / format->width) { - case 1: - default: - bin_h = IMX219_BINNING_NONE; - break; - case 2: - bin_h = bpp == 8 ? IMX219_BINNING_X2_ANALOG : IMX219_BINNING_X2; - break; - } - - switch (crop->height / format->height) { - case 1: - default: - bin_v = IMX219_BINNING_NONE; - break; - case 2: - bin_v = bpp == 8 ? IMX219_BINNING_X2_ANALOG : IMX219_BINNING_X2; - break; - } - + imx219_get_binning(imx219, &bin_h, &bin_v); cci_write(imx219->regmap, IMX219_REG_BINNING_MODE_H, bin_h, &ret); cci_write(imx219->regmap, IMX219_REG_BINNING_MODE_V, bin_v, &ret); @@ -847,6 +868,7 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, int exposure_max; int exposure_def; int hblank, llp_min; + int pixel_rate; /* Update limits and set FPS to default */ __v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN, @@ -882,6 +904,12 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, */ hblank = prev_line_len - mode->width; __v4l2_ctrl_s_ctrl(imx219->hblank, hblank); + + /* Scale the pixel rate based on the mode specific factor */ + pixel_rate = imx219_get_pixel_rate(imx219) * + imx219_get_rate_factor(imx219); + __v4l2_ctrl_modify_range(imx219->pixel_rate, pixel_rate, + pixel_rate, 1, pixel_rate); } return 0; -- 2.48.1
