795ac295ea
camorama calls VIDIOC_REQBUFS(V4L2_MEMORY_MMAP) to test if MMAP support works (this was added specifically because of the previously broken MMAP support in atomisp). Currently this fails because atomisp_get_css_frame_info() fails in this case. Although it is weird to call VIDIOC_REQBUFS before VIDIOC_S_FMT, it is allowed to do this. Fix this not working by doing a S_FMT to V4L2_PIX_FMT_YUV420 + the highest supported resolution. Note this will cause camorama to use mmap mode, which means it will also use libv4l2 to do format conversion. libv4l2 will pick V4L2_PIX_FMT_RGB565 as input format and this will lead to a garbled video display. This is a libv4lconvert bug, the RGB565 -> RGB24 path in libv4lconvert assumes that stride == width which is not true on the atomisp. I've already send out a libv4lconvert fix for this. Also this can be worked around by passing --dont-use-libv4l2 as argument to camorama. Link: https://git.linuxtv.org/v4l-utils.git/commit/?id=aecfcfccfc2f78d7531456ffa5465666c6bc641e Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.