The LLP_MIN of 3560 is only needed to fix artefacts seen with binned resolutions. As increasing the LLP reduces the highest possible framerate by ~3%, use the old default minimum of 3448 if we are not doing 2x2 analog binning. Also restore the fll_def value for non-binned modes in the modes definition to restore the default mode framerate to 30fps. Suggested-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/linux-media/CAPY8ntC1-S6zKtDvmc6EgyxP+j6rTShuG8Dr8PKb9XQr2PeS_w@xxxxxxxxxxxxxx/ Signed-off-by: Jai Luthra <jai.luthra@xxxxxxxxxxxxxxxx> --- Changes in v2: - Fix the binning check, and only update the LLP minimum if we are doing analog binning - Add a note in the commit message for the fll_def value reverts --- drivers/media/i2c/imx219.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c index 2081822533f9dff0a1ca93a09dd8333ec4043645..ec8d32b0f9e75b4b14d905b1e6b85180e5697ce1 100644 --- a/drivers/media/i2c/imx219.c +++ b/drivers/media/i2c/imx219.c @@ -74,7 +74,8 @@ #define IMX219_FLL_MAX 0xffff #define IMX219_VBLANK_MIN 32 #define IMX219_REG_LINE_LENGTH_A CCI_REG16(0x0162) -#define IMX219_LLP_MIN 0x0de8 +#define IMX219_LLP_MIN 0x0d78 +#define IMX219_BINNED_LLP_MIN 0x0de8 #define IMX219_LLP_MAX 0x7ff0 #define IMX219_REG_X_ADD_STA_A CCI_REG16(0x0164) @@ -311,13 +312,13 @@ static const struct imx219_mode supported_modes[] = { /* 8MPix 15fps mode */ .width = 3280, .height = 2464, - .fll_def = 3415, + .fll_def = 3526, }, { /* 1080P 30fps cropped */ .width = 1920, .height = 1080, - .fll_def = 1707, + .fll_def = 1763, }, { /* 2x2 binned 60fps mode */ @@ -865,7 +866,7 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, const struct imx219_mode *mode; struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; - unsigned int bin_h, bin_v; + u8 bin_h, bin_v; u32 prev_line_len; format = v4l2_subdev_state_get_format(state, 0); @@ -895,7 +896,7 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { int exposure_max; int exposure_def; - int hblank; + int hblank, llp_min; int pixel_rate; /* Update limits and set FPS to default */ @@ -912,6 +913,19 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, imx219->exposure->minimum, exposure_max, imx219->exposure->step, exposure_def); + + /* + * With analog binning the default minimum line length of 3448 + * can cause artefacts with RAW10 formats, because the ADC + * operates on two lines together. So we switch to a higher + * minimum of 3560. + */ + imx219_get_binning(state, &bin_h, &bin_v); + llp_min = (bin_h & bin_v) == IMX219_BINNING_X2_ANALOG ? + IMX219_BINNED_LLP_MIN : IMX219_LLP_MIN; + __v4l2_ctrl_modify_range(imx219->hblank, llp_min - mode->width, + IMX219_LLP_MAX - mode->width, 1, + llp_min - mode->width); /* * Retain PPL setting from previous mode so that the * line time does not change on a mode change. @@ -920,10 +934,6 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd, * mode width subtracted. */ hblank = prev_line_len - mode->width; - __v4l2_ctrl_modify_range(imx219->hblank, - IMX219_LLP_MIN - mode->width, - IMX219_LLP_MAX - mode->width, 1, - IMX219_LLP_MIN - mode->width); __v4l2_ctrl_s_ctrl(imx219->hblank, hblank); /* Scale the pixel rate based on the mode specific factor */ -- 2.48.1
