[Letux-kernel] TILER patches for Pyra
H. Nikolaus Schaller
hns at goldelico.com
Sat Dec 8 23:38:34 CET 2018
> Am 08.12.2018 um 23:07 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> Hi all,
>> Am 08.12.2018 um 15:57 schrieb aTc <atc at k-n-p.org>:
>> On 12/8/18 1:33 PM, H. Nikolaus Schaller wrote:
>>> I have seen that ED has announced that there is a new set of TILER patches:
>>> "zmatt has reimplemented his rotation hack (so the Pyra is finally fully usable again!)"
>>> Is this reimplementaion available anywhere for integration into the letux tree?
>> I applied it to the 4.19.4 kernel, 4.19.3 is very unstable.
>> It's a quick hack though, not the cleaned up version zmatt mentioned here before.
> I have looked through them and they work if applied.
> But one patch breaks on other platforms (omap3).
> I remember that we had already discussed that and I found that
> tries to fix it. But makes it a platform dependent compile.
> So we had discussed that a while ago, worked on a solution and
> then forgot about it because it worked with X11 on all platforms.
> Therefore I'd suggest a better fix is to detect OMAP5 in
> and make the #if dynamic.
> I remember there was some API to check for the exact platform.
> Something where patterns could be provided and it was used
> to decide between AM/DM37xx and AM33xx. Maybe in the PVR/SGX
> driver stuff?
> So something like
> if (platform_is("OMAP543"))
> vma->vm_page_prot = pgprot_device(vma->vm_page_prot);
> else // all others incl. OMAP3 w/o TILER
> fb_pgprotect(file, vma, start);
> could be the better hack...
> Does anyone remember how this "platform_is" function is called?
I think I found it: soc_device_match()
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