[Letux-kernel] fb tiler considered harmful

H. Nikolaus Schaller hns at goldelico.com
Wed Feb 8 07:19:56 CET 2017


Hi Andreas,

> Am 08.02.2017 um 06:52 schrieb Andreas Kemnade <andreas at kemnade.info>:
> 
> Hi,
> 
> As I wanted to test the new alsa routing patches, there was one problem:
> No Framebuffer output,
> 
> Suspicious pieces in console log:
> [    2.556823] omapdrm omapdrm.0: DMM not available, disable DMM support
> [    2.565490] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [    2.565551] [drm] No driver support for vblank timestamp query.
> [    2.566528] omapdrm omapdrm.0: Tiled buffers require DMM
> [    2.567382] omapdrm omapdrm.0: failed to allocate buffer object
> [    2.567718] omapdrm omapdrm.0: omap_fbdev_init failed
> [    2.567932] [drm] Initialized omapdrm 1.0.0 20110917 on minor 0
> 
> I have to add that I have compiled the framebuffer statically and using it
> for console output.
> 
> After reverting the following branches, the framebuffer worked again.
> 
> extern/mvduin/patch/tiler-buf-dumb
> extern/mvduin/patch/tiler-fbdev

Thanks for noting!

This means the TILER should somehow be made OMAP5 (Pyra) only or fixed
to gracefully handle OMAP3.

BR and thanks,
Nikolaus

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