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Message-ID: <e0b84511-dbb4-46fa-9465-713369232f6f@starfivetech.com>
Date:   Thu, 7 Dec 2023 18:48:13 +0800
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Subject: Re: [v3 5/6] drm/vs: Add hdmi driver
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To:     Andy Yan <andyshrk@163.com>
CC:     Maxime Ripard <mripard@kernel.org>,
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        "krzysztof.kozlowski+dt@linaro.org" 
        <krzysztof.kozlowski+dt@linaro.org>,
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        Xingyu Wu <xingyu.wu@starfivetech.com>,
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References: <20231204123315.28456-1-keith.zhao@starfivetech.com>
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 <e90142d.44b1.18c43833b63.Coremail.andyshrk@163.com>
From:   Keith Zhao <keith.zhao@starfivetech.com>
In-Reply-To: <e90142d.44b1.18c43833b63.Coremail.andyshrk@163.com>
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On 2023/12/7 17:02, Andy Yan wrote:
> 
> 
> 
> 
> Hi Keith：
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> At 2023-12-06 22:11:33, "Keith Zhao" <keith.zhao@starfivetech.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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