linux-kernel - Re: [PATCH v2 5/6] ARM: dts: rockchip: enable RGA for rk3288 devices

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Date:   Mon, 17 Jul 2017 11:09:30 +0800
From:   Jacob Chen <jacobchen110@...il.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, Heiko Stuebner <heiko@...ech.de>,
        robh+dt@...nel.org, Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        laurent.pinchart+renesas@...asonboard.com,
        Hans Verkuil <hans.verkuil@...co.com>, s.nawrocki@...sung.com,
        Tomasz Figa <tfiga@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>
Subject: Re: [PATCH v2 5/6] ARM: dts: rockchip: enable RGA for rk3288 devices

Hi Laurent,

2017-07-17 10:28 GMT+08:00 Laurent Pinchart <laurent.pinchart@...asonboard.com>:
> Hi Jacob,
>
> On Sunday 16 Jul 2017 12:23:02 Jacob Chen wrote:
>> 2017-07-15 17:16 GMT+08:00 Laurent Pinchart:
>> > On Saturday 15 Jul 2017 14:58:39 Jacob Chen wrote:
>> >> Signed-off-by: Jacob Chen <jacob-chen@...wrt.com>
>> >> ---
>> >>
>> >>  arch/arm/boot/dts/rk3288-evb.dtsi                 | 4 ++++
>> >>  arch/arm/boot/dts/rk3288-firefly-reload-core.dtsi | 4 ++++
>> >>  arch/arm/boot/dts/rk3288-firefly.dtsi             | 4 ++++
>> >>  arch/arm/boot/dts/rk3288-miqi.dts                 | 4 ++++
>> >>  arch/arm/boot/dts/rk3288-popmetal.dts             | 4 ++++
>> >>  arch/arm/boot/dts/rk3288-tinker.dts               | 4 ++++
>> >
>> > Some boards are missing from this list (Fennec, Phycore, ...) What
>> > criteria have you used to decide on which ones to enable the RGA ? That
>> > should be explained in the commit message.
>>
>> Ok.
>>
>> I just enable the boards i have tested, because i can't make sure it
>> won't break the other board because of clocks or power-domains.
>
> Given the clocks and power domains shouldn't be board-specific, would it make
> sense to try and get the change tested on the remaining boards ? You could

Not all drivers have handle power domains and clocks appropriately, It
may triggers bugs,
but since it's a V4l2 driver not DRM driver, i will enable it for all
rk3288 boards.
(DRM device will try to probe in very eraly stage and update
clocks/power-domains...)


> then enable the device in the SoC .dtsi file, which would be much simpler.
>

We have many different version RGA drivers in rockchip downstream kernel.
To keep consistent, i didn't enable it in .dtsi.


>> >>  6 files changed, 24 insertions(+)
>
> --
> Regards,
>
> Laurent Pinchart
>