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Date: Wed, 11 Nov 2015 17:10:42 -0600
From: Rob Herring <robh@...nel.org>
To: Yakir Yang <ykk@...k-chips.com>
Cc: Inki Dae <inki.dae@...sung.com>,
Andrzej Hajda <a.hajda@...sung.com>,
Joonyoung Shim <jy0922.shim@...sung.com>,
Seung-Woo Kim <sw0312.kim@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Jingoo Han <jingoohan1@...il.com>,
Thierry Reding <treding@...dia.com>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Heiko Stuebner <heiko@...ech.de>,
Mark Yao <mark.yao@...k-chips.com>,
Russell King <linux@....linux.org.uk>, djkurtz@...omium.org,
dianders@...omium.org, Sean Paul <seanpaul@...omium.org>,
Kukjin Kim <kgene@...nel.org>,
Kumar Gala <galak@...eaurora.org>, emil.l.velikov@...il.com,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
Kishon Vijay Abraham I <kishon@...com>,
Pawel Moll <pawel.moll@....com>, ajaynumb@...il.com,
robherring2@...il.com, javier@....samsung.com,
Andy Yan <andy.yan@...k-chips.com>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v9 15/17] drm: bridge: analogix/dp: try force hpd after
plug in lookup failed
On Fri, Oct 30, 2015 at 09:09:15AM +0800, Yakir Yang wrote:
> Some edp screen do not have hpd signal, so we can't just return
> failed when hpd plug in detect failed.
>
> This is an hardware property, so we need add a devicetree property
> "analogix,need-force-hpd" to indicate this sutiation.
>
> Tested-by: Heiko Stuebner <heiko@...ech.de>
> Tested-by: Javier Martinez Canillas <javier@....samsung.com>
> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
> ---
I didn't find this one in v10. Did it get dropped?
> Changes in v9: None
> Changes in v8: None
> Changes in v7: None
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3:
> - Add "analogix,need-force-hpd" to indicate whether driver need foce
> hpd when hpd detect failed.
>
> Changes in v2: None
>
> .../bindings/display/bridge/analogix_dp.txt | 4 ++-
> .../bindings/display/exynos/exynos_dp.txt | 1 +
> .../display/rockchip/analogix_dp-rockchip.txt | 1 +
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 36 +++++++++++++++++++---
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 2 ++
> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 9 ++++++
> 6 files changed, 47 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> index 7659a7a..74f0e80 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
> @@ -22,6 +22,9 @@ Required properties for dp-controller:
> from general PHY binding: Should be "dp".
>
> Optional properties for dp-controller:
> + -analogix,need-force-hpd:
> + Indicate driver need force hpd when hpd detect failed, this
> + is used for some eDP screen which don't have hpd signal.
This should be a generic property.
Rob
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