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Message-ID: <be8fe638-03c6-c0d1-4c30-1a8f9a195968@samsung.com>
Date: Wed, 28 Feb 2018 07:39:34 +0100
From: Andrzej Hajda <a.hajda@...sung.com>
To: Rob Herring <robh+dt@...nel.org>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Inki Dae <inki.dae@...sung.com>,
Mark Rutland <mark.rutland@....com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Chanwoo Choi <cw00.choi@...sung.com>,
Archit Taneja <architt@...eaurora.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
linux-samsung-soc@...r.kernel.org,
Linux USB List <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v4 4/6] arm64: dts: exynos: add OF graph between MHL and
USB connector
On 27.02.2018 22:24, Rob Herring wrote:
> On Wed, Feb 21, 2018 at 2:55 AM, Andrzej Hajda <a.hajda@...sung.com> wrote:
>> OF graph describes MHL data lanes between MHL and respective USB
>> connector.
>>
>> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
>> ---
>> v4:
>> - added missing reg property in connector's port node (Krzysztof)
>> ---
>> .../boot/dts/exynos/exynos5433-tm2-common.dtsi | 32 ++++++++++++++++++++--
>> 1 file changed, 29 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> index f604f6b1a9c2..2ed506df94d0 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
>> @@ -817,9 +817,22 @@
>> clocks = <&pmu_system_controller 0>;
>> clock-names = "xtal";
>>
>> - port {
>> - mhl_to_hdmi: endpoint {
>> - remote-endpoint = <&hdmi_to_mhl>;
>> + ports {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + port@0 {
>> + reg = <0>;
>> + mhl_to_hdmi: endpoint {
>> + remote-endpoint = <&hdmi_to_mhl>;
>> + };
>> + };
>> +
>> + port@1 {
>> + reg = <1>;
>> + mhl_to_musb_con: endpoint {
>> + remote-endpoint = <&musb_con_to_mhl>;
>> + };
> These ports are mutually exclusive, right? If so, it should be 1 port
> with 2 endpoints. Ports should represent independent data flows.
> Something muxed or replicated (1 to many connection) should be be
> endpoints.
No, this is HDMI -> MHL bridge, so port 0 is HDMI input, and port 1 is
MHL output.
Regards
Andrzej
>
> Rob
>
>
>
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