| Message ID | 20210412113457.328012-23-tomi.valkeinen@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: ti-vpe: cal: prepare for multistream support | expand |
Hi Tomi, Thank you for the patch. On Mon, Apr 12, 2021 at 02:34:51PM +0300, Tomi Valkeinen wrote: > cal_camerarx_sd_set_fmt() accepts any value for the format field, but > there should be no reason to have any other value accepted than > V4L2_FIELD_NONE. So set the field always to V4L2_FIELD_NONE. What if the source produces V4L2_FIELD_INTERLACED_(TB|BT) ? Shouldn't we accept that and propagate it ? Same for V4L2_FIELD_TOP and V4L2_FIELD_BOTTOM I suppose. V4L2_FIELD_SEQ_(TB|BT) is likely not needed as I doubt sources will send that. V4L2_FIELD_ALTERNATE is a bit more tricky, as the driver has to report which field a particular buffer contains, and I'm not sure we could do so (maybe based on the CSI-2 frame number ?). I'm fine dropping support for interlaced formats until someone wants to support them though, it's up to you. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> > --- > drivers/media/platform/ti-vpe/cal-camerarx.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c > index 245c601b992c..880261d53a1d 100644 > --- a/drivers/media/platform/ti-vpe/cal-camerarx.c > +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c > @@ -702,10 +702,7 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, > if (!fmtinfo) > fmtinfo = &cal_formats[0]; > > - /* > - * Clamp the size, update the code. The field and colorspace are > - * accepted as-is. > - */ > + /* Clamp the size, update the code. The colorspace is accepted as-is. */ > bpp = ALIGN(fmtinfo->bpp, 8); > > format->format.width = clamp_t(unsigned int, format->format.width, > @@ -715,6 +712,7 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, > CAL_MIN_HEIGHT_LINES, > CAL_MAX_HEIGHT_LINES); > format->format.code = fmtinfo->code; > + format->format.field = V4L2_FIELD_NONE; > > /* Store the format and propagate it to the source pad. */ > fmt = cal_camerarx_get_pad_format(phy, cfg, CAL_CAMERARX_PAD_SINK,
On 18/04/2021 16:14, Laurent Pinchart wrote: > Hi Tomi, > > Thank you for the patch. > > On Mon, Apr 12, 2021 at 02:34:51PM +0300, Tomi Valkeinen wrote: >> cal_camerarx_sd_set_fmt() accepts any value for the format field, but >> there should be no reason to have any other value accepted than >> V4L2_FIELD_NONE. So set the field always to V4L2_FIELD_NONE. > > What if the source produces V4L2_FIELD_INTERLACED_(TB|BT) ? Shouldn't we > accept that and propagate it ? Same for V4L2_FIELD_TOP and > V4L2_FIELD_BOTTOM I suppose. V4L2_FIELD_SEQ_(TB|BT) is likely not needed > as I doubt sources will send that. V4L2_FIELD_ALTERNATE is a bit more > tricky, as the driver has to report which field a particular buffer > contains, and I'm not sure we could do so (maybe based on the CSI-2 > frame number ?). > > I'm fine dropping support for interlaced formats until someone wants to > support them though, it's up to you. To be honest, I kind of presumed that interlace is not supported. But I can see it mentioned very shortly in the TRM. If I recall right, I added this because v4l2-compliance complained as the driver accepted any value. I'll read about the v4l2 interlace handling to understand this better. Tomi
diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c index 245c601b992c..880261d53a1d 100644 --- a/drivers/media/platform/ti-vpe/cal-camerarx.c +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c @@ -702,10 +702,7 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, if (!fmtinfo) fmtinfo = &cal_formats[0]; - /* - * Clamp the size, update the code. The field and colorspace are - * accepted as-is. - */ + /* Clamp the size, update the code. The colorspace is accepted as-is. */ bpp = ALIGN(fmtinfo->bpp, 8); format->format.width = clamp_t(unsigned int, format->format.width, @@ -715,6 +712,7 @@ static int cal_camerarx_sd_set_fmt(struct v4l2_subdev *sd, CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES); format->format.code = fmtinfo->code; + format->format.field = V4L2_FIELD_NONE; /* Store the format and propagate it to the source pad. */ fmt = cal_camerarx_get_pad_format(phy, cfg, CAL_CAMERARX_PAD_SINK,
cal_camerarx_sd_set_fmt() accepts any value for the format field, but there should be no reason to have any other value accepted than V4L2_FIELD_NONE. So set the field always to V4L2_FIELD_NONE. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> --- drivers/media/platform/ti-vpe/cal-camerarx.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)