From: Eric Nelson <eric.nelson@boundarydevices.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 1/2] mx6sabresd: Avoid hang when HDMI cable is not connected
Date: Fri, 13 Sep 2013 07:51:22 -0700 [thread overview]
Message-ID: <5233266A.7050302@boundarydevices.com> (raw)
In-Reply-To: <CAOMZO5BgE0shKC2MWKRZJbtZjvabi4U+fJGb-YqH-ED7HKC=kw@mail.gmail.com>
Hi Fabio,
On 09/13/2013 06:58 AM, Fabio Estevam wrote:
> Hi Stefano,
>
> On Fri, Sep 13, 2013 at 5:16 AM, Stefano Babic <sbabic@denx.de> wrote:
>> I admit that using DT also for u-boot seems a better solution. You're
>> right about i.MX6 in kernel, but on the other hand I like how it is
>> described for i.MX28 boards. The display-timings node contain all
>> information we need. It would be nice to have the same for i.MX6.
>
> We currently have the same in DT for mx6 as well. Check this commit,
> for example:
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/arm/boot/dts/imx6q-sabrelite.dts?id=722cfacd2e719b6447fb4bd5cd3372725876336d
>
Nice!
So, how should we get this done?
We have support for parsing individual lines of DT, and the primary
thing(s) needed by U-Boot's display are in the timing block of the
device tree, but I wonder whether it makes sense to implement a
full parser for that, or a simpler parser for fb_videomode.
Since both cfb_console in U-Boot and the of_get_fb_videomode()
routine in the kernel use fb_videomode, it should be straightforward
to hand the information off.
I don't think the outer information (the lvds-channel at 0 and
ldb blocks in imx6q-sabrelite.dts) should be parsed by U-Boot
as device-tree code since that path leads to having a full
device-tree compiler that seems inappropriate.
Let me know your thoughts.
Eric
next prev parent reply other threads:[~2013-09-13 14:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-11 21:14 [U-Boot] [PATCH v2 1/2] mx6sabresd: Avoid hang when HDMI cable is not connected Fabio Estevam
2013-09-11 21:14 ` [U-Boot] [PATCH v2 2/2] mx6sabresd: Reset counter to prevent error message Fabio Estevam
2013-09-12 10:17 ` Stefano Babic
2013-09-12 15:28 ` Eric Nelson
2013-09-20 16:03 ` Stefano Babic
2013-09-12 9:47 ` [U-Boot] [PATCH v2 1/2] mx6sabresd: Avoid hang when HDMI cable is not connected Stefano Babic
2013-09-12 15:02 ` Eric Nelson
2013-09-13 8:16 ` Stefano Babic
2013-09-13 13:58 ` Fabio Estevam
2013-09-13 14:19 ` Stefano Babic
2013-09-13 14:51 ` Eric Nelson [this message]
2013-09-13 18:11 ` Fabio Estevam
2013-09-13 18:34 ` Eric Nelson
2013-09-20 16:03 ` Stefano Babic
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