On Thu, Oct 17, 2019 at 09:47:05AM +0200, Thomas Zimmermann wrote: > The DRM TODO list now contains an entry for converting fbdev > drivers over to DRM. > > Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> > --- > Documentation/gpu/todo.rst | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst > index 79785559d711..23b3a67794ba 100644 > --- a/Documentation/gpu/todo.rst > +++ b/Documentation/gpu/todo.rst > @@ -462,3 +462,30 @@ Contact: Sam Ravnborg > > Outside DRM > =========== > + > +Convert fbdev drivers to DRM > +---------------------------- > + > +There are plenty of fbdev drivers for older hardware. Some hwardware has > +become obsolete, but some still provides good(-enough) framebuffers. The > +drivers that are still useful should be converted to DRM and afterwards > +removed from fbdev. > + > +Very simple fbdev drivers can best be converted by starting with a new > +DRM driver. Simple KMS helpers and SHMEM should be able to handle any > +existing hardware. The new driver's call-back functions are filled from > +existing fbdev code. > + > +More complex fbdev drivers can be refactored step-by-step into a DRM > +driver with the help of the DRM fbconv helpers. [1] These helpers provide > +the transition layer between the DRM core infrastructure and the fbdev > +driver interface. Create a new DRM driver on top of the fbconv helpers, > +copy over the fbdev driver, and hook it up to the DRM code. Examples for > +several fbdev drivers are available at [1] and a tutorial of this process > +available at [2]. The result is a primitive DRM driver that can run X11 > +and Weston. > + > + - [1] https://gitlab.freedesktop.org/tzimmermann/linux/tree/fbconv > + - [2] https://gitlab.freedesktop.org/tzimmermann/linux/blob/fbconv/drivers/gpu/drm/drm_fbconv_helper.c btw if you want to push a patch to get this built and published: https://gitlab.freedesktop.org/drm/igt-gpu-tools/blob/master/.gitlab-ci.yml The "pages" job is the one which gets published to https://drm.pages.freedesktop.org/igt-gpu-tools/ With that you could point at the pretty hmtl even. -Daniel > + > +Contact: Thomas Zimmermann <tzimmermann@xxxxxxx> > -- > 2.23.0 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
