linux-kernel - Re: [PATCH v4 02/17] dt-bindings: display: rockchip: analogix-dp: Add support for RK3588

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Message-ID: <2d9c71cf-6612-44cb-a223-a2184e027d1c@rock-chips.com>
Date: Mon, 6 Jan 2025 15:28:15 +0800
From: Damon Ding <damon.ding@...k-chips.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, heiko@...ech.de
Cc: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 rfoss@...nel.org, vkoul@...nel.org, sebastian.reichel@...labora.com,
 cristian.ciocaltea@...labora.com, l.stach@...gutronix.de,
 andy.yan@...k-chips.com, hjc@...k-chips.com, algea.cao@...k-chips.com,
 kever.yang@...k-chips.com, dri-devel@...ts.freedesktop.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-phy@...ts.infradead.org
Subject: Re: [PATCH v4 02/17] dt-bindings: display: rockchip: analogix-dp: Add
 support for RK3588

Hi Krzysztof,

On 2024/12/27 15:13, Krzysztof Kozlowski wrote:
> On 26/12/2024 07:32, Damon Ding wrote:
>> Compared with RK3288/RK3399, the HBR2 link rate support is the main
>> improvement of RK3588 eDP TX controller, and there are also two
>> independent eDP display interfaces on RK3588 Soc.
>>
>> The newly added 'apb' reset is to ensure the APB bus of eDP controller
>> works well on the RK3588 SoC.
>>
>> Signed-off-by: Damon Ding <damon.ding@...k-chips.com>
>>
>> ---
>>
>> Changes in v2:
>> - Add the main defferences of the RK3588 eDP and the previous versions
>>    in commit message
>>
>> Changes in v3:
>> - Expand the property clock-names, resets and reset-names
>>
>> Changes in v4:
>> - Remove 'spdif' clock which added in v3
>> - Add the comment of newly added 'apb' reset in commit message
>> ---
>>   .../bindings/display/rockchip/rockchip,analogix-dp.yaml  | 9 +++++++--
>>   1 file changed, 7 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
>> index 60dedf9b2be7..200703905b29 100644
>> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
>> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
>> @@ -15,6 +15,7 @@ properties:
>>       enum:
>>         - rockchip,rk3288-dp
>>         - rockchip,rk3399-edp
>> +      - rockchip,rk3588-edp
>>   
>>     clocks:
>>       minItems: 2
>> @@ -31,10 +32,14 @@ properties:
>>       maxItems: 1
>>   
>>     resets:
>> -    maxItems: 1
>> +    minItems: 1
>> +    maxItems: 2
>>   
>>     reset-names:
>> -    const: dp
>> +    minItems: 1
>> +    items:
>> +      - const: dp
>> +      - const: apb
> 
> I asked why existing variants get this new reset. This is not supposed
> to be flexible (which I wrote as well), but constrained per variant. Or
> explain why not.
> 
> 
> 

I misunderstood you before. Indeed, the new reset is only for RK3588, so 
the patch should be similar to the modifications made for RK3576 HDPTX 
PHY dt-bindings [0].

Best regards
Damon

[0]https://patchwork.kernel.org/project/linux-rockchip/patch/20241231092721.252405-1-andyshrk@163.com/