Hi Jai On Wed, Feb 19, 2025 at 05:16:43PM +0530, Jai Luthra wrote: > 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 default minimum of 3448 for non-binned > resolutions. > 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> > --- > drivers/media/i2c/imx219.c | 24 ++++++++++++++++-------- > 1 file changed, 16 insertions(+), 8 deletions(-) > > diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c > index f662c9d755114265aad46c5cc7f5031b9bc0dbba..6e51a7af5e2a05cacefb201d96a9fbdc349f17d8 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) > @@ -317,13 +318,13 @@ 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 */ > @@ -901,7 +902,7 @@ 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 */ > @@ -918,6 +919,17 @@ 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 because the ADC operates on two lines > + * together. Switch to higher minimum of 3560 if we are binning. > + */ > + llp_min = (bin_h || bin_v) ? IMX219_BINNED_LLP_MIN : As you know, this is always true. > + 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. > @@ -926,10 +938,6 @@ 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 >
