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From: Joel Fernandes <joelagnelf@nvidia.com>
To: Timur Tabi <ttabi@nvidia.com>,
	"dakr@kernel.org" <dakr@kernel.org>,
	John Hubbard <jhubbard@nvidia.com>
Cc: Alistair Popple <apopple@nvidia.com>,
	"simona@ffwll.ch" <simona@ffwll.ch>,
	Eliot Courtney <ecourtney@nvidia.com>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"rust-for-linux@vger.kernel.org" <rust-for-linux@vger.kernel.org>,
	"airlied@gmail.com" <airlied@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"aliceryhl@google.com" <aliceryhl@google.com>,
	Alexandre Courbot <acourbot@nvidia.com>
Subject: Re: [PATCH] gpu: nova-core: require little endian
Date: Tue, 7 Apr 2026 14:30:13 -0400	[thread overview]
Message-ID: <f8229cdf-77bd-491c-b0ed-bbbe33156f1d@nvidia.com> (raw)
In-Reply-To: <6c0ca9e1e574635710ded3816bb9bd429c19dad3.camel@nvidia.com>



On 4/7/2026 2:02 PM, Timur Tabi wrote:
> On Tue, 2026-04-07 at 12:56 +0200, Danilo Krummrich wrote:
>> On Mon Apr 6, 2026 at 6:30 PM CEST, Joel Fernandes wrote:
>>> Nouveau does not do this, and no other GPU driver afaics either.
>>
>> Nouveau has nvkm_device_endianness() [1], which it configured before everything
>> else is done.
>>
>> I assume that's not an option for later GPUs?
>>
>> [1]
>> https://elixir.bootlin.com/linux/v6.19.11/source/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c#L3111
> 
> Pascal is the last GPU to have NV_PMC_BOOT_1_ENDIAN0.  If nvkm_device_endianness() is called on
> Turing, then that might be a bug.

Yes, this was on old/legacy GPUs, not GSP-based ones.

thanks,

--
Joel Fernandes


  reply	other threads:[~2026-04-07 18:30 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-06  6:52 [PATCH] gpu: nova-core: require little endian Eliot Courtney
2026-04-06 16:30 ` Joel Fernandes
2026-04-07 10:56   ` Danilo Krummrich
2026-04-07 18:02     ` Timur Tabi
2026-04-07 18:30       ` Joel Fernandes [this message]
2026-04-06 16:34 ` Gary Guo
2026-04-06 19:37 ` John Hubbard
2026-04-06 19:46 ` Danilo Krummrich
2026-04-07  2:15 ` Eliot Courtney

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