Hi all, On Mon, 17 Oct 2022 16:30:59 +0200 Dorota Czaplejewicz <dorota.czaplejewicz@xxxxxxx> wrote: > Hi, > > On Mon, 17 Oct 2022 11:28:57 +0300 > Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > [snip] > > I would also very much appreciate feedback from NXP on this. There's a > > risk of ill side-effects that I would prefer ruling out very clearly. > > I posted a question on the NXP forum: https://community.nxp.com/t5/i-MX-Processors/i-MX8MQ-CSI-line-size-constraint-documentation-mistake/m-p/1538629#M196448 > This question received a reply from NXP today: https://community.nxp.com/t5/i-MX-Processors/i-MX8MQ-CSI-line-size-constraint-documentation-mistake/m-p/1546872/highlight/true#M197067 Quoting NXP's answer: > Do I understand correctly, that streams divisible by 4×4 will work on other i.MX8 hardware too? - Yes > Will those kind of resolutions work on i.MX7 series CSI hardware? - Yes which implies no bad side effects the way I read it. Is this sufficient for the kernel? Cheers, Dorota > > > > > Signed-off-by: Dorota Czaplejewicz <dorota.czaplejewicz@xxxxxxx> > > > --- > > > Hello, > > > > > > the Librem 5 is using an out-of-tree driver for s5k3l6xx, and rounding to 4 is optimal to operate it. > > > > > > This revision improves the commit message. > > > > > > Cheers, > > > Dorota Czaplejewicz > > > > > > drivers/staging/media/imx/imx7-media-csi.c | 4 ++-- > > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > > > diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c > > > index a0553c24cce4..af821b410c3f 100644 > > > --- a/drivers/staging/media/imx/imx7-media-csi.c > > > +++ b/drivers/staging/media/imx/imx7-media-csi.c > > > @@ -999,10 +999,10 @@ static int imx7_csi_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix, > > > } > > > > > > /* Round up width for minimum burst size */ > > > - width = round_up(mbus->width, 8); > > > + width = round_up(mbus->width, 4); > > > > > > /* Round up stride for IDMAC line start address alignment */ > > > - stride = round_up((width * cc->bpp) >> 3, 8); > > > + stride = round_up((width * cc->bpp) >> 3, 4); > > > > > > pix->width = width; > > > pix->height = mbus->height; > > >
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