linux-kernel - Re: [PATCH 08/13] media: qcom: camss: csiphy-3ph: Add Gen2 v1.2 two-phase MIPI CSI-2 DPHY init

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Message-ID: <2ab60446-7187-43c9-893b-68cac8c9b96f@quicinc.com>
Date: Wed, 10 Jul 2024 21:14:49 +0800
From: Depeng Shao <quic_depengs@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, <rfoss@...nel.org>,
        <todor.too@...il.com>, <bryan.odonoghue@...aro.org>,
        <mchehab@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <quic_eberman@...cinc.com>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...cinc.com>
Subject: Re: [PATCH 08/13] media: qcom: camss: csiphy-3ph: Add Gen2 v1.2
 two-phase MIPI CSI-2 DPHY init



On 7/10/2024 7:09 PM, Krzysztof Kozlowski wrote:
> On 09/07/2024 18:06, Depeng Shao wrote:
>> Add a PHY configuration sequence for the SM8550 which uses a Qualcomm
>> Gen 2 version 1.2 CSI-2 PHY.
>>
>> The PHY can be configured as two phase or three phase in C-PHY or D-PHY
>> mode. This configuration supports two-phase D-PHY mode.
>>
>> Signed-off-by: Depeng Shao <quic_depengs@...cinc.com>
>> ---
>>   .../qcom/camss/camss-csiphy-3ph-1-0.c         | 105 ++++++++++++++++++
>>   1 file changed, 105 insertions(+)
>>
>> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
>> index 1219a25ec55b..b6d5a27b94a6 100644
>> --- a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
>> +++ b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
>> @@ -324,6 +324,111 @@ csiphy_lane_regs lane_regs_sm8250[] = {
>>   	{0x0884, 0x01, 0x00, CSIPHY_DEFAULT_PARAMS},
>>   };
>>   
>> +/* GEN2 1.2 2PH */
>> +static const struct
>> +csiphy_lane_regs lane_regs_sm8550[] = {
> 
> This should sparkle warnings.
> 
> There is no user of it. You must organize your patches in logical junks.
> Adding piece of structure without users is not a logical chunk.
> 
> Best regards,
> Krzysztof
> 

Hi Krzysztof,

Sure, will move this patch to "media: qcom: camss: Add sm8550 support",
It is used in below code.

> +	case CAMSS_8550:
> +		regs->lane_regs = &lane_regs_sm8550[0];
> +		regs->lane_array_size = ARRAY_SIZE(lane_regs_sm8550);
> +		regs->offset = 0x1000;
> +		break;
>  	default:

Thanks,
Depeng