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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Emil Velikov <emil.l.velikov@gmail.com>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-fbdev <linux-fbdev@vger.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	ML dri-devel <dri-devel@lists.freedesktop.org>,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 2/2] powerpc/configs: replace deprecated riva/nvidia with nouveau
Date: Mon, 18 May 2020 12:46:54 +0000	[thread overview]
Message-ID: <9ea9bd468fbce85b666991cde4196b88c7929e1d.camel@kernel.crashing.org> (raw)
In-Reply-To: <CACvgo53uWVmhwon4+Fn5=_4HPXSciqNrf1MSJjt1kA3G2wyECw@mail.gmail.com>

On Mon, 2020-05-18 at 12:19 +0100, Emil Velikov wrote:
> 
>  - attempted out-of-bound attempts to read the vbios

So on these things, the actual ROM doesn't contain what you want, but
the device-tree has a property "NVDA,BMP" that contains some kind of
mini-BIOS (around 2.4KB) which should contain the necessary tables the
driver is looking for.

I think nouveau has code to find these in nvkm/subdev/bios/shadowof.c,
so at least that should have been working, but maybe some
debugging/instrumentation would be useful there.

> Genuine concern or noise? Likely using the bios from open firmware,
> check any of the other options - see NvBios in [1]
>  - cannot figure out the timer input frequency
> No idea
>  - the TV1 EDID is empty
> Is there an actual TV connected to the device, check with another cable

Probaby not.

> Regardless of the patches, reporting [2] the above would be a nice move.
> 
> Thanks
> Emil
> [1] https://nouveau.freedesktop.org/wiki/KernelModuleParameters/
> [2] https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues

WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Emil Velikov <emil.l.velikov@gmail.com>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-fbdev <linux-fbdev@vger.kernel.org>,
	Antonino Daplas <adaplas@gmail.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	ML dri-devel <dri-devel@lists.freedesktop.org>,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 2/2] powerpc/configs: replace deprecated riva/nvidia with nouveau
Date: Mon, 18 May 2020 22:46:54 +1000	[thread overview]
Message-ID: <9ea9bd468fbce85b666991cde4196b88c7929e1d.camel@kernel.crashing.org> (raw)
In-Reply-To: <CACvgo53uWVmhwon4+Fn5=_4HPXSciqNrf1MSJjt1kA3G2wyECw@mail.gmail.com>

On Mon, 2020-05-18 at 12:19 +0100, Emil Velikov wrote:
> 
>  - attempted out-of-bound attempts to read the vbios

So on these things, the actual ROM doesn't contain what you want, but
the device-tree has a property "NVDA,BMP" that contains some kind of
mini-BIOS (around 2.4KB) which should contain the necessary tables the
driver is looking for.

I think nouveau has code to find these in nvkm/subdev/bios/shadowof.c,
so at least that should have been working, but maybe some
debugging/instrumentation would be useful there.

> Genuine concern or noise? Likely using the bios from open firmware,
> check any of the other options - see NvBios in [1]
>  - cannot figure out the timer input frequency
> No idea
>  - the TV1 EDID is empty
> Is there an actual TV connected to the device, check with another cable

Probaby not.

> Regardless of the patches, reporting [2] the above would be a nice move.
> 
> Thanks
> Emil
> [1] https://nouveau.freedesktop.org/wiki/KernelModuleParameters/
> [2] https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues


WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Emil Velikov <emil.l.velikov@gmail.com>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-fbdev <linux-fbdev@vger.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	ML dri-devel <dri-devel@lists.freedesktop.org>,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 2/2] powerpc/configs: replace deprecated riva/nvidia with nouveau
Date: Mon, 18 May 2020 22:46:54 +1000	[thread overview]
Message-ID: <9ea9bd468fbce85b666991cde4196b88c7929e1d.camel@kernel.crashing.org> (raw)
In-Reply-To: <CACvgo53uWVmhwon4+Fn5=_4HPXSciqNrf1MSJjt1kA3G2wyECw@mail.gmail.com>

On Mon, 2020-05-18 at 12:19 +0100, Emil Velikov wrote:
> 
>  - attempted out-of-bound attempts to read the vbios

So on these things, the actual ROM doesn't contain what you want, but
the device-tree has a property "NVDA,BMP" that contains some kind of
mini-BIOS (around 2.4KB) which should contain the necessary tables the
driver is looking for.

I think nouveau has code to find these in nvkm/subdev/bios/shadowof.c,
so at least that should have been working, but maybe some
debugging/instrumentation would be useful there.

> Genuine concern or noise? Likely using the bios from open firmware,
> check any of the other options - see NvBios in [1]
>  - cannot figure out the timer input frequency
> No idea
>  - the TV1 EDID is empty
> Is there an actual TV connected to the device, check with another cable

Probaby not.

> Regardless of the patches, reporting [2] the above would be a nice move.
> 
> Thanks
> Emil
> [1] https://nouveau.freedesktop.org/wiki/KernelModuleParameters/
> [2] https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues

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  reply	other threads:[~2020-05-18 12:46 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-17 22:05 [PATCH v2 1/2] fbdev: annotate rivafb/nvidiafb as obsolete Emil Velikov
2020-05-17 22:05 ` Emil Velikov
2020-05-17 22:05 ` [PATCH v2 2/2] powerpc/configs: replace deprecated riva/nvidia with nouveau Emil Velikov
2020-05-17 22:05   ` Emil Velikov
2020-05-17 22:05   ` Emil Velikov
2020-05-18  0:44   ` Benjamin Herrenschmidt
2020-05-18  0:44     ` Benjamin Herrenschmidt
2020-05-18  0:44     ` Benjamin Herrenschmidt
2020-05-18 11:00     ` Emil Velikov
2020-05-18 11:00       ` Emil Velikov
2020-05-18 11:00       ` Emil Velikov
2020-05-18 12:39       ` Benjamin Herrenschmidt
2020-05-18 12:39         ` Benjamin Herrenschmidt
2020-05-18 12:39         ` Benjamin Herrenschmidt
2020-05-18  7:30   ` Michael Ellerman
2020-05-18  7:30     ` Michael Ellerman
2020-05-18  7:30     ` Michael Ellerman
2020-05-18 11:19     ` Emil Velikov
2020-05-18 11:19       ` Emil Velikov
2020-05-18 11:19       ` Emil Velikov
2020-05-18 12:46       ` Benjamin Herrenschmidt [this message]
2020-05-18 12:46         ` Benjamin Herrenschmidt
2020-05-18 12:46         ` Benjamin Herrenschmidt
2020-05-18 12:48       ` Bartlomiej Zolnierkiewicz
2020-05-18 12:48         ` Bartlomiej Zolnierkiewicz
2020-05-18 12:48         ` Bartlomiej Zolnierkiewicz
2020-05-18 13:19         ` Emil Velikov
2020-05-18 13:19           ` Emil Velikov
2020-05-18 13:19           ` Emil Velikov
2020-05-18 13:48     ` Andreas Schwab
2020-05-18 13:48       ` Andreas Schwab
2020-05-18 13:48       ` Andreas Schwab
     [not found]       ` <87v9ktpd4v.fsf-hBGjKatGTSWzQB+pC5nmwQ@public.gmane.org>
2020-05-18 14:38         ` Ilia Mirkin
     [not found]           ` <CAKb7UvgBhvE-dEfva+n5SUTJ4CZT2KKkno=SVb9Jx5KBbZWR+A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-05-18 15:48             ` Andreas Schwab
2020-05-17 23:11 ` [PATCH v2 1/2] fbdev: annotate rivafb/nvidiafb as obsolete kbuild test robot
2020-05-17 23:11   ` kbuild test robot
2020-05-17 23:11 ` kbuild test robot
2020-05-17 23:11   ` kbuild test robot

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