Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx> writes: > On Fri, Mar 17, 2017 at 03:47:42PM -0700, Eric Anholt wrote: >> This is a modesetting driver for the pl111 CLCD display controller >> found on various ARM platforms such as the Versatile Express. The >> driver has only been tested on the bcm911360_entphn platform so far, >> with PRIME-based buffer sharing between vc4 and clcd. >> >> It reuses the existing devicetree binding, while not using quite as >> many of its properties as the fbdev driver does (those are left for >> future work). > > As we're multiplatform on ARM, and this is using the PL11x AMBA IDs, > we must ensure that it's compatible with everything that the fbdev > driver is compatible with... however, I suspect that's not worth the > effort (unless Linus W wants it?) > > If we make it PL111 specific, then we don't need to handle Integrator > CP, or the Versatile PB/AB weirdness. The only thing left is the > power etc enable bits on Realview which uses the PL111. See the > code for Realview in drivers/video/fbdev/amba-clcd-versatile.c. Restricting to PL111 for now sounds good to me. Those Realview bits look like they're turning on a power domain -- shouldn't we represent those as a regulator or a power domain? If we did, then plugging that into a panel driver sounds straightforward. (that's assuming that they're powering panel. not the controller -- I can't quite tell from the code I've browsed so far)
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