linux-kernel - Re: [PATCH v2 2/3] phy: starfive: Add mipi dphy rx support

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Message-ID: <b07842e4-54cc-873e-3140-4a933e054802@starfivetech.com>
Date:   Mon, 3 Apr 2023 14:31:27 +0800
From:   Changhuang Liang <changhuang.liang@...rfivetech.com>
To:     Conor Dooley <conor.dooley@...rochip.com>
CC:     Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jack Zhu <jack.zhu@...rfivetech.com>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v2 2/3] phy: starfive: Add mipi dphy rx support



On 2023/4/3 14:24, Conor Dooley wrote:
> On Mon, Apr 03, 2023 at 09:39:00AM +0800, Changhuang Liang wrote:
>> On 2023/3/31 21:52, Vinod Koul wrote:
>>> On 21-03-23, 14:08, Changhuang Liang wrote:
>>>> On 2023/3/20 20:37, Vinod Koul wrote:
>>>>> On 22-02-23, 17:59, Changhuang Liang wrote:
>>>>>> [...]
>>>>>> +static const struct regval_t stf_dphy_init_list[] = {
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(4), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(8), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(12), 0x0000fff0 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(16), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(20), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(24), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(28), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(32), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(36), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(40), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(40), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(48), 0x24000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(52), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(56), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(60), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(64), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(68), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(72), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(76), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(80), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(84), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(88), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(92), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(96), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(100), 0x02000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(104), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(108), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(112), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(116), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(120), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(124), 0x0000000c },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(128), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(132), 0xcc500000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(136), 0x000000cc },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(140), 0x00000000 },
>>>>>> +	{ STF_DPHY_APBCFGSAIF__SYSCFG(144), 0x00000000 },
>>>>>> +};
>>>>>> +
>>>>>> +static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
>>>>>> +{
>>>>>> +	struct stf_dphy *dphy = phy_get_drvdata(phy);
>>>>>> +	int map[6] = {4, 0, 1, 2, 3, 5};
>>>>>
>>>>> what does this mean?
>>>>
>>>> This is the physical lane and logical lane mapping table, should I add a note for it?
>>>
>>> Yes please. Also will the mapping be always static or ever change?
>>>  
>>
>> The mapping is always static on the visionfive2 single board computer.
>> Thanks for your comments.
> 
> What about other boards featuring a JH7110?

maybe add this mapping in the device tree, we just need to parse the device tree is better.