From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: Florian Weimer <fweimer@redhat.com>,
Andrew Pinski <pinskia@gmail.com>,
Richard Earnshaw <Richard.Earnshaw@arm.com>,
Ramana Radhakrishnan <ramana.gcc@googlemail.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
GNU C Library <libc-alpha@sourceware.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Russell King <linux@armlinux.org.uk>,
LKML <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: framebuffer corruption due to overlapping stp instructions on arm64
Date: Mon, 6 Aug 2018 14:22:00 +0200 [thread overview]
Message-ID: <CAKv+Gu9Sa0pPeKVYBcCF8w-4QYYtp0YhHArzL3F2bnfVqyBYYA@mail.gmail.com> (raw)
In-Reply-To: <CAKv+Gu8384LZwL898wJ8BKjmJNzvd+-cSFUp4X4OpfmRDCP4Ng@mail.gmail.com>
On 6 August 2018 at 14:19, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> On 6 August 2018 at 14:09, Mikulas Patocka <mpatocka@redhat.com> wrote:
>>
>>
>> On Mon, 6 Aug 2018, Ard Biesheuvel wrote:
>>
>>> >> Are we talking about a quirk for the Armada 8040 or about PCIe on ARM
>>> >> in general?
>>> >
>>> > I don't know - there are not any other easily available PCIe ARM boards
>>> > except for Armada 8040.
>>>
>>> ... indeed, and sadly, the ones that are available all have this
>>> horrible Synopsys DesignWare PCIe IP that does not implement a true
>>> root complex at all, but is simply repurposed endpoint IP with some
>>> tweaks so it vaguely resembles a root complex.
>>>
>>> But this is exactly why I am asking: I use a AMD Seattle Overdrive as
>>> my main Linux development system, and it runs the gnome-shell stack
>>> flawlessly (using the nouveau driver), as well as a UEFI framebuffer
>>> using efifb. So my suspicion is that this is either a Synopsys IP
>>> issue or an interconnect issue, and has nothing to do with the
>>> impedance mismatch between AMBA and PCIe.
>>
>> If you run the program for testing memcpy on framebuffer that I posted in
>> this thread - does it detect some corruption for you?
>>
>
> I won't be able to check that for a while - I'm currently travelling.
>
>>
>> BTW. does the Radeon GPU driver work for you?
>>
>> My observation is that OpenGL with Nouveau works, but it's slow and the
>> whole system locks up when playing video in chromium.
>>
Are you setting the pstate to auto? That helps a lot in my experience.
I.e.,
echo auto > /sys/kernel/debug/dri/0/pstate
next prev parent reply other threads:[~2018-08-06 12:22 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-02 19:31 framebuffer corruption due to overlapping stp instructions on arm64 Mikulas Patocka
[not found] ` <CAHCPf3tFGqkYEcWNN4LaWThw_rVqT316pzLv6T7RfxwO-eZ0EA@mail.gmail.com>
2018-08-03 6:35 ` Mikulas Patocka
2018-08-03 7:16 ` Ard Biesheuvel
2018-08-03 9:41 ` Will Deacon
2018-08-03 17:09 ` Mikulas Patocka
2018-08-03 17:32 ` Sinan Kaya
2018-08-03 17:33 ` Ard Biesheuvel
2018-08-03 18:25 ` Mikulas Patocka
2018-08-03 20:44 ` Matt Sealey
2018-08-03 21:20 ` Ard Biesheuvel
2018-08-06 10:25 ` Mikulas Patocka
2018-08-06 12:42 ` Robin Murphy
2018-08-06 12:53 ` Ard Biesheuvel
2018-08-06 13:41 ` Marcin Wojtas
2018-08-06 13:48 ` Ard Biesheuvel
2018-08-06 14:07 ` Marcin Wojtas
2018-08-06 14:13 ` Mikulas Patocka
2018-08-06 15:47 ` Ard Biesheuvel
2018-08-06 17:09 ` Mikulas Patocka
2018-08-06 17:21 ` Ard Biesheuvel
2018-08-06 19:54 ` Mikulas Patocka
2018-08-06 20:11 ` Ard Biesheuvel
2018-08-06 20:31 ` Mikulas Patocka
2018-08-07 16:40 ` Marcin Wojtas
2018-08-07 17:39 ` Mikulas Patocka
2018-08-07 18:07 ` Ard Biesheuvel
2018-08-07 18:17 ` Mikulas Patocka
[not found] ` <CAPv3WKcKoEe=Qysp6Oac2C=G9bUhUQf1twSRCY+_qJ6XEC-iag@mail.gmail.com>
2018-08-08 14:10 ` Mikulas Patocka
2018-08-06 17:13 ` Catalin Marinas
2018-08-06 17:19 ` Mikulas Patocka
2018-08-08 18:31 ` Mikulas Patocka
2018-08-04 13:29 ` Mikulas Patocka
2018-08-08 12:16 ` Catalin Marinas
2018-08-08 13:02 ` David Laight
2018-08-08 13:46 ` Mikulas Patocka
2018-08-08 14:26 ` David Laight
2018-08-08 14:50 ` Catalin Marinas
2018-08-08 16:21 ` Mikulas Patocka
2018-08-08 16:31 ` Arnd Bergmann
2018-08-08 16:43 ` David Laight
2018-08-08 18:56 ` Mikulas Patocka
2018-08-08 18:37 ` Mikulas Patocka
2018-08-08 11:39 ` Catalin Marinas
2018-08-08 14:12 ` Mikulas Patocka
2018-08-08 14:28 ` Catalin Marinas
2018-08-08 18:40 ` Mikulas Patocka
2018-08-08 15:01 ` Richard Earnshaw (lists)
2018-08-08 15:14 ` Catalin Marinas
2018-08-08 16:01 ` Arnd Bergmann
2018-08-08 18:25 ` Mikulas Patocka
2018-08-08 21:51 ` Arnd Bergmann
2018-08-09 15:29 ` Arnd Bergmann
2018-08-03 7:11 ` Andrew Pinski
2018-08-03 7:53 ` Florian Weimer
2018-08-03 9:12 ` Szabolcs Nagy
2018-08-03 9:15 ` Ramana Radhakrishnan
2018-08-03 9:29 ` Ard Biesheuvel
2018-08-03 9:37 ` Ramana Radhakrishnan
2018-08-03 9:42 ` Richard Earnshaw (lists)
2018-08-04 0:58 ` Mikulas Patocka
2018-08-04 1:13 ` Andrew Pinski
2018-08-04 11:04 ` Mikulas Patocka
2018-08-05 18:33 ` Florian Weimer
2018-08-06 8:02 ` Mikulas Patocka
2018-08-06 8:10 ` Ard Biesheuvel
2018-08-06 10:31 ` Mikulas Patocka
2018-08-06 10:37 ` Ard Biesheuvel
2018-08-06 10:42 ` Mikulas Patocka
2018-08-06 10:48 ` Ard Biesheuvel
2018-08-06 12:09 ` Mikulas Patocka
2018-08-06 12:19 ` Ard Biesheuvel
2018-08-06 12:22 ` Ard Biesheuvel [this message]
2018-08-07 14:14 ` Mikulas Patocka
2018-08-07 14:40 ` Ard Biesheuvel
2018-08-08 19:15 ` Mikulas Patocka
2018-08-06 11:19 ` Siddhesh Poyarekar
2018-08-06 11:29 ` Ard Biesheuvel
2018-08-06 14:26 ` Tulio Magno Quites Machado Filho
2018-08-05 21:51 ` Pavel Machek
2018-08-06 14:30 ` Mikulas Patocka
2018-08-03 11:24 ` David Laight
2018-08-03 12:04 ` Mikulas Patocka
2018-08-03 13:04 ` David Laight
2018-08-05 14:36 ` Mikulas Patocka
2018-08-06 10:18 ` David Laight
2018-08-07 14:07 ` Mikulas Patocka
2018-08-07 14:33 ` David Laight
2018-08-08 14:21 ` Mikulas Patocka
2018-08-03 13:20 ` Mikulas Patocka
2018-08-03 13:31 ` Mikulas Patocka
2018-08-03 14:17 ` Richard Earnshaw (lists)
2018-08-05 21:36 ` Pavel Machek
2018-08-06 8:04 ` Ramana Radhakrishnan
2018-08-06 8:44 ` Pavel Machek
2018-08-06 9:11 ` Ard Biesheuvel
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