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Date:   Thu, 7 Dec 2023 18:48:13 +0800
From:   Keith Zhao <keith.zhao@...rfivetech.com>
To:     Andy Yan <andyshrk@....com>
CC:     Maxime Ripard <mripard@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "tzimmermann@...e.de" <tzimmermann@...e.de>,
        "airlied@...il.com" <airlied@...il.com>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        William Qiu <william.qiu@...rfivetech.com>,
        Xingyu Wu <xingyu.wu@...rfivetech.com>,
        "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "palmer@...belt.com" <palmer@...belt.com>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        Shengyang Chen <shengyang.chen@...rfivetech.com>,
        Jack Zhu <jack.zhu@...rfivetech.com>,
        Changhuang Liang <changhuang.liang@...rfivetech.com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "suijingfeng@...ngson.cn" <suijingfeng@...ngson.cn>
Subject: Re: [v3 5/6] drm/vs: Add hdmi driver

On 2023/12/7 17:02, Andy Yan wrote:
> 
> 
> 
> 
> Hi Keith：
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> At 2023-12-06 22:11:33, "Keith Zhao" <keith.zhao@...rfivetech.com> wrote:
>>
>>
>>On 2023/12/6 20:56, Maxime Ripard wrote:
>>> On Wed, Dec 06, 2023 at 08:02:55PM +0800, Keith Zhao wrote:
>>>> >> +static const struct of_device_id starfive_hdmi_dt_ids[] = {
>>>> >> +	{ .compatible = "starfive,jh7110-inno-hdmi",},
>>>> > 
>>>> > So it's inno hdmi, just like Rockchip then?
>>>> > 
>>>> > This should be a common driver.
>>>>
>>>> Rockchip has a inno hdmi IP. and Starfive has a inno hdmi IP.
>>>> but the harewawre difference of them is big , it is not easy to use the common driver
>>>> maybe i need the inno hdmi version here to make a distinction
>>> 
>>> I just had a look at the rockchip header file: all the registers but the
>>> STARFIVE_* ones are identical.
>>> 
>>> There's no need to have two identical drivers then, please use the
>>> rockchip driver instead.
>>> 
>>> Maxime
>>
>>ok, have a simple test , edid can get . i will continue 
> 
> Maybe you can take drivers/gpu/drm/bridge/synopsys/dw-hdmi as a reference， this
> is also a hdmi ip used by rockchip/meson/sunxi/jz/imx。
> We finally make it share one driver。
>>
hi Andy:

dw_hdmi seems a good choice , it can handle inno hdmi hardware by define its dw_hdmi_plat_data.
does it means i can write own driver files such as(dw_hdmi-starfive.c) based on dw_hdmi instead of add plat_data in inno_hdmi.c

Thanks for pointing this out!!!

>>
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