linux-kernel - Re: [PATCH v2 1/3] dt-bindings: soc: rockchip: add rk3576 vo1-grf syscon

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Message-ID: <3cd260c8-86e5-4833-b23e-b73dc6417f81@gmail.com>
Date: Fri, 18 Oct 2024 15:34:23 +0800
From: Frank Wang <frawang.cn@...il.com>
To: Dragan Simic <dsimic@...jaro.org>
Cc: vkoul@...nel.org, kishon@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, heiko@...ech.de, linux-phy@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
 william.wu@...k-chips.com, tim.chen@...k-chips.com,
 yubing.zhang@...k-chips.com, Frank Wang <frank.wang@...k-chips.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: soc: rockchip: add rk3576 vo1-grf
 syscon

Hi Dragan,

On 2024/10/18 14:37, Dragan Simic wrote:
> Hello Frank,
>
> On 2024-10-18 08:18, Frank Wang wrote:
>> On 2024/10/18 13:02, Dragan Simic wrote:
>>> On 2024-10-17 04:52, Frank Wang wrote:
>>>> From: Frank Wang <frank.wang@...k-chips.com>
>>>>
>>>> Add rockchip,rk3576-vo1-grf syscon compatible, the vo1-grf is
>>>> configured in usbdp phy driver.
>>>>
>>>> Signed-off-by: Frank Wang <frank.wang@...k-chips.com>
>>>> ---
>>>> Changelog:
>>>> v2:
>>>>  - This is a new patch adds rk3576-vo1-grf syscon.
>>>
>>> Could you, please, clarify a bit why is this additional patch
>>> needed in this series?
>>
>> I mentioned in the commit content. The usbdp-phy driver select dp
>> lanes via configuring the vo1-grf.
>
> Yes, I already saw that in the patch description.  Though, and
> I apologize if I'm missing something obvious, I can't see where
> is it actually used in the code?  Is it yet to be used in the
> dts(i) files?
>
> I'd appreciate if you could clarify that just a bit further, so
> I can hopefully understand it better.
>

Yes, the usbdp_phy node in dts(i) will assign the vo1-grf phandle like this:

usbdp_phy: phy@...10000 {
         ...
         rockchip,vo-grf = <&vo1_grf>;
};

And the usbdp-phy driver parses it and assign to udphy->vogrf, it uses 
in rk_udphy_dplane_select().

The related codes have already existed in the current driver, so for 
RK3576, just only need to do a configuration.

Best regards,
Frank

>>>> v1:
>>>>  - none
>>>>
>>>>  Documentation/devicetree/bindings/soc/rockchip/grf.yaml | 2 ++
>>>>  1 file changed, 2 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
>>>> b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
>>>> index 50d727f4b76c6..fd42217ab85e7 100644
>>>> --- a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
>>>> +++ b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
>>>> @@ -33,6 +33,7 @@ properties:
>>>>                - rockchip,rk3576-usb-grf
>>>>                - rockchip,rk3576-usbdpphy-grf
>>>>                - rockchip,rk3576-vo0-grf
>>>> +              - rockchip,rk3576-vo1-grf
>>>>                - rockchip,rk3576-vop-grf
>>>>                - rockchip,rk3588-bigcore0-grf
>>>>                - rockchip,rk3588-bigcore1-grf
>>>> @@ -283,6 +284,7 @@ allOf:
>>>>          compatible:
>>>>            contains:
>>>>              enum:
>>>> +              - rockchip,rk3576-vo1-grf
>>>>                - rockchip,rk3588-vo-grf
>>>>                - rockchip,rk3588-vo0-grf
>>>>                - rockchip,rk3588-vo1-grf
>>
>>
>> _______________________________________________
>> Linux-rockchip mailing list
>> Linux-rockchip@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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