From: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
To: Hans Verkuil <hverkuil-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>
Cc: Bryan Wu <pengw-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
hansverk-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org,
linux-media-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
ebrower-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
jbang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
wenjiaz-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
davidw-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
gfitzer-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org,
"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 1/2] [media] v4l: tegra: Add NVIDIA Tegra VI driver
Date: Tue, 25 Aug 2015 16:24:12 +0200 [thread overview]
Message-ID: <20150825142411.GC3820@ulmo.nvidia.com> (raw)
In-Reply-To: <55DC789E.8060300-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 697 bytes --]
On Tue, Aug 25, 2015 at 04:15:58PM +0200, Hans Verkuil wrote:
> On 08/25/15 15:44, Thierry Reding wrote:
> > On Mon, Aug 24, 2015 at 05:26:20PM -0700, Bryan Wu wrote:
[...]
> > > For CMA we need increase the default memory size.
> >
> > I'd rather not rely on CMA at all, especially since we do have a way
> > around it.
>
> For the record, I have no problem with it if we start out with contiguous
> DMA now and enhance it later. I get the impression that getting the IOMMU
> to work is non-trivial, and I don't think it should block merging of this
> driver.
>
> This is all internal to the driver, so changing it later will not affect
> userspace.
Fair enough.
Thierry
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WARNING: multiple messages have this Message-ID (diff)
From: Thierry Reding <treding@nvidia.com>
To: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Bryan Wu <pengw@nvidia.com>, <hansverk@cisco.com>,
<linux-media@vger.kernel.org>, <ebrower@nvidia.com>,
<jbang@nvidia.com>, <swarren@nvidia.com>, <wenjiaz@nvidia.com>,
<davidw@nvidia.com>, <gfitzer@nvidia.com>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>
Subject: Re: [PATCH 1/2] [media] v4l: tegra: Add NVIDIA Tegra VI driver
Date: Tue, 25 Aug 2015 16:24:12 +0200 [thread overview]
Message-ID: <20150825142411.GC3820@ulmo.nvidia.com> (raw)
In-Reply-To: <55DC789E.8060300@xs4all.nl>
[-- Attachment #1: Type: text/plain, Size: 697 bytes --]
On Tue, Aug 25, 2015 at 04:15:58PM +0200, Hans Verkuil wrote:
> On 08/25/15 15:44, Thierry Reding wrote:
> > On Mon, Aug 24, 2015 at 05:26:20PM -0700, Bryan Wu wrote:
[...]
> > > For CMA we need increase the default memory size.
> >
> > I'd rather not rely on CMA at all, especially since we do have a way
> > around it.
>
> For the record, I have no problem with it if we start out with contiguous
> DMA now and enhance it later. I get the impression that getting the IOMMU
> to work is non-trivial, and I don't think it should block merging of this
> driver.
>
> This is all internal to the driver, so changing it later will not affect
> userspace.
Fair enough.
Thierry
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next prev parent reply other threads:[~2015-08-25 14:24 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-21 0:51 [PATCH RFC 0/2] NVIDIA Tegra VI V4L2 driver Bryan Wu
2015-08-21 0:51 ` [PATCH 1/2] [media] v4l: tegra: Add NVIDIA Tegra VI driver Bryan Wu
2015-08-21 0:51 ` [PATCH 2/2] ARM64: add tegra-vi support in T210 device-tree Bryan Wu
2015-08-21 0:51 ` [PATCH RFC 0/2] NVIDIA Tegra VI V4L2 driver Bryan Wu
2015-08-21 0:51 ` [PATCH 1/2] [media] v4l: tegra: Add NVIDIA Tegra VI driver Bryan Wu
2015-08-21 9:28 ` Hans Verkuil
2015-08-25 0:43 ` Bryan Wu
2015-08-21 13:03 ` Thierry Reding
2015-08-21 13:25 ` Hans Verkuil
[not found] ` <20150821130339.GB22118-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-08-25 0:26 ` Bryan Wu
2015-08-25 0:26 ` Bryan Wu
[not found] ` <55DBB62C.4020606-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2015-08-25 6:30 ` Hans Verkuil
2015-08-25 6:30 ` Hans Verkuil
[not found] ` <55DC0B91.2000204-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>
2015-08-25 11:25 ` Thierry Reding
2015-08-25 11:25 ` Thierry Reding
2015-08-25 17:04 ` Bryan Wu
2015-08-25 17:04 ` Bryan Wu
2015-08-25 13:44 ` Thierry Reding
2015-08-25 13:44 ` Thierry Reding
2015-08-25 14:15 ` Hans Verkuil
[not found] ` <55DC789E.8060300-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>
2015-08-25 14:24 ` Thierry Reding [this message]
2015-08-25 14:24 ` Thierry Reding
[not found] ` <20150825134444.GH14034-AwZRO8vwLAwmlAP/+Wk3EA@public.gmane.org>
2015-08-25 21:42 ` Bryan Wu
2015-08-25 21:42 ` Bryan Wu
2015-08-21 0:51 ` [PATCH 2/2] ARM64: add tegra-vi support in T210 device-tree Bryan Wu
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