linux-kernel - Re: [PATCH 2/4] arm64: dts: rockchip: Add RGA support to the PX30

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Message-ID: <f4ad8ea4-7904-1458-e564-2d20c87ed417@gmail.com>
Date:   Thu, 16 Apr 2020 15:44:25 +0200
From:   Johan Jonker <jbx6244@...il.com>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jacob Chen <jacob-chen@...wrt.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Heiko Stuebner <heiko@...ech.de>,
        Hans Verkuil <hansverk@...co.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 2/4] arm64: dts: rockchip: Add RGA support to the PX30

On 4/16/20 3:24 PM, Paul Kocialkowski wrote:
> Hi,
> 
> On Thu 16 Apr 20, 15:02, Johan Jonker wrote:
>> Hi Paul,
>>
>> The conversion of rockchip-rga.txt to rockchip-rga.yaml by myself just
>> has been approved by robh.
> 
> Huh, I looked around for ongoing related work but missed it.
> I'll definitely rebase on top of your series and use the yaml description
> instead. Thanks!
> 
>> Maybe place dts patches at the end of a patch serie.
>> Could you include a &rga patch if your device is supported in mainline,
>> so we can test with:
>> make ARCH=arm64 dtbs_check
>> DT_SCHEMA_FILES=Documentation/devicetree/bindings/media/rockchip-rga.yaml
> 
> I tested with the PX30 EVB so I can surely add a node there if that turns
> out necessary (see below).
> 
>> Johan
>>
>> On 4/16/20 1:50 PM, Paul Kocialkowski wrote:
>>> The PX30 features a RGA block: add the necessary node to support it.
>>>
>>> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
>>> ---
>>>  arch/arm64/boot/dts/rockchip/px30.dtsi | 11 +++++++++++
>>>  1 file changed, 11 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/rockchip/px30.dtsi b/arch/arm64/boot/dts/rockchip/px30.dtsi
>>> index 75908c587511..4bfbee9d4123 100644
>>> --- a/arch/arm64/boot/dts/rockchip/px30.dtsi
>>> +++ b/arch/arm64/boot/dts/rockchip/px30.dtsi
>>> @@ -1104,6 +1104,17 @@ vopl_mmu: iommu@...70f00 {
>>>  		status = "disabled";
>>>  	};
>>>  
>>> +	rga: rga@...80000 {
>>> +		compatible = "rockchip,px30-rga";
>>> +		reg = <0x0 0xff480000 0x0 0x10000>;
>>> +		interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH 0>;
>>> +		clocks = <&cru ACLK_RGA>, <&cru HCLK_RGA>, <&cru SCLK_RGA_CORE>;
>>> +		clock-names = "aclk", "hclk", "sclk";
>>> +		resets = <&cru SRST_RGA>, <&cru SRST_RGA_A>, <&cru SRST_RGA_H>;
>>> +		reset-names = "core", "axi", "ahb";
>>> +		power-domains = <&power PX30_PD_VO>;
>>
>> 		status = "disabled";
> 
> As of 5.6, the rk3399 has the node enabled by default. Did that change?

'status' disappeared during review for rk3399 between v2 and v3, but
doesn't mention the reason. If someone can give more info here?

https://lore.kernel.org/lkml/1500101920-24039-5-git-send-email-jacob-chen@iotwrt.com/

https://lore.kernel.org/lkml/1501470460-12014-5-git-send-email-jacob-chen@iotwrt.com/

> 
> Since it's a standalone block that has no I/O dependency, I don't really see
> the point of disabling it by default.

Vop, hdmi and other video devices are also disabled.
Follow the rest I think...

> 
> What do you think?
> 
> Cheers,
> 
> Paul
> 
>>> +	};
>>> +
>>>  	qos_gmac: qos@...18000 {
>>>  		compatible = "syscon";
>>>  		reg = <0x0 0xff518000 0x0 0x20>;
>>>
>>
>