On Fri, Oct 22, 2021 at 04:40:40PM +0200, Javier Martinez Canillas wrote: > The simpledrm driver allows to use the frame buffer that was set-up by the > firmware. This gives early video output before the platform DRM driver is > probed and takes over. > > But it would be useful to have a way to disable this take over by the real > DRM drivers. For example, there may be bugs in the DRM drivers that could > cause the display output to not work correctly. > > For those cases, it would be good to keep the simpledrm driver instead and > at least get a working display as set-up by the firmware. > > Let's add a drm.remove_fb boolean kernel command line parameter, that when > set to false will prevent the conflicting framebuffers to being removed. > > Since the drivers call drm_aperture_remove_conflicting_framebuffers() very > early in their probe callback, this will cause the drivers' probe to fail. Why is that better than just modprobe.blacklisting those drivers? -- Ville Syrjälä Intel
