Em Fri, 29 Oct 2021 09:49:36 +0100 Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> escreveu: > Without setting a default mode at open(), applications that > don't call VIDIOC_SET_PARM with a custom atomisp parameters > won't work, as the pipeline won't be set: > > atomisp-isp2 0000:00:03.0: can't create streams > atomisp-isp2 0000:00:03.0: __get_frame_info 1600x1200 (padded to 0) returned -22 > > So, as an step to allow generic apps to use this driver, put > the device's run_mode in preview after open. > > After this patch, using v4l2grab starts to work: > > $ v4l2grab -D -f 'NV12' -x 1600 -y 1200 -d /dev/video2 -u > $ nvt/raw2pnm -x1600 -y1200 -f NV12 out017.raw out017.pnm > $ feh out017.pnm Added support for YUYV at v4l2grab (at contrib/test, under v4l-utils). The above can now be just: $ v4l2grab -f YUYV -x 1600 -y 1200 -d /dev/video2 -u $ feh out017.pnm (on a side note, the colorspace conversion from YUYV seems ackward, but this can be adjusted later on at the toolset and/or at atomisp) > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> > --- > drivers/staging/media/atomisp/pci/atomisp_fops.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/staging/media/atomisp/pci/atomisp_fops.c b/drivers/staging/media/atomisp/pci/atomisp_fops.c > index 72cbdce2142a..7df982c80b1a 100644 > --- a/drivers/staging/media/atomisp/pci/atomisp_fops.c > +++ b/drivers/staging/media/atomisp/pci/atomisp_fops.c > @@ -893,6 +893,11 @@ static int atomisp_open(struct file *file) > else > pipe->users++; > rt_mutex_unlock(&isp->mutex); > + > + /* Ensure that a mode is set */ > + if (asd) > + v4l2_ctrl_s_ctrl(asd->run_mode, ATOMISP_RUN_MODE_PREVIEW); > + > return 0; > > css_error:
