From: Rob Herring <robh@kernel.org>
To: Hans Verkuil <hverkuil@xs4all.nl>
Cc: devicetree@vger.kernel.org, Hans Verkuil <hans.verkuil@cisco.com>,
dri-devel@lists.freedesktop.org,
Krzysztof Kozlowski <krzk@kernel.org>,
linux-media@vger.kernel.org
Subject: Re: [PATCH 7/9] dt-bindings: media/s5p-cec.txt: document needs-hpd property
Date: Fri, 9 Jun 2017 09:07:19 -0500 [thread overview]
Message-ID: <20170609140719.o2qzty6eyez66oxy@rob-hp-laptop> (raw)
In-Reply-To: <20170607144616.15247-8-hverkuil@xs4all.nl>
On Wed, Jun 07, 2017 at 04:46:14PM +0200, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@cisco.com>
>
> Needed for boards that wire the CEC pin in such a way that it
> is unavailable when the HPD is low.
>
> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: devicetree@vger.kernel.org
> ---
> Documentation/devicetree/bindings/media/s5p-cec.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/media/s5p-cec.txt b/Documentation/devicetree/bindings/media/s5p-cec.txt
> index 4bb08d9d940b..261af4d1a791 100644
> --- a/Documentation/devicetree/bindings/media/s5p-cec.txt
> +++ b/Documentation/devicetree/bindings/media/s5p-cec.txt
> @@ -17,6 +17,12 @@ Required properties:
> - samsung,syscon-phandle - phandle to the PMU system controller
> - hdmi-phandle - phandle to the HDMI controller
>
> +Optional:
> + - needs-hpd : if present the CEC support is only available when the HPD
> + is high. Some boards only let the CEC pin through if the HPD is high, for
> + example if there is a level converter that uses the HPD to power up
> + or down.
Seems like something common. Can you document in a common location?
> +
> Example:
>
> hdmicec: cec@100B0000 {
> --
> 2.11.0
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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next prev parent reply other threads:[~2017-06-09 14:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170607144616.15247-1-hverkuil@xs4all.nl>
2017-06-07 14:46 ` [PATCH 7/9] dt-bindings: media/s5p-cec.txt: document needs-hpd property Hans Verkuil
2017-06-09 14:07 ` Rob Herring [this message]
2017-06-09 14:11 ` Hans Verkuil
2017-06-09 15:31 ` Rob Herring
2017-06-09 15:55 ` Hans Verkuil
[not found] ` <8e6ed9b6-5b4b-8650-2c92-47a593e73d94-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2017-06-09 16:46 ` Rob Herring
2017-06-07 14:46 ` [PATCH 8/9] s5p_cec: set the CEC_CAP_NEEDS_HPD flag if needed Hans Verkuil
[not found] ` <CGME20170612124120epcas1p3ef17f5a1f6f71c00757d4f3ee283ffc8@epcas1p3.samsung.com>
[not found] ` <20170607144616.15247-9-hverkuil-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>
2017-06-12 12:41 ` Sylwester Nawrocki
2017-06-07 14:46 ` [PATCH 9/9] ARM: dts: exynos: add needs-hpd to &hdmicec for Odroid-U3 Hans Verkuil
2017-06-07 18:36 ` Krzysztof Kozlowski
2017-06-07 18:59 ` Hans Verkuil
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