[linux-sunxi] Re: [PATCH v4 0/5] simplefb: add clock handling code
geert at linux-m68k.org
Wed Nov 12 00:34:41 PST 2014
On Tue, Nov 11, 2014 at 10:49 PM, Grant Likely <grant.likely at linaro.org> wrote:
> However, I am concerned about handover. I've lost track over the entire
> thread on whether the handover mechanism has been resolved, and I would
> really like to have a proposed solution to this documented in the
> binding. The fact that there is nothing tying the simple framebuffer to
> the actual hardware backing the framebuffer is concerning. It means the
> kernel needs to guess which graphics device is associated with the
We did discuss handover in Düsseldorf, and concluded that the simplefb's
regs property can be used for this.
While on a modern system with unified memory this association cannot be
derived in a generic way, a device-specific driver for the graphics hardware
can if the regs property of the simplefb node matches the address the CRTC
engine is configured for.
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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