linux-kernel - Re: [PATCH 11/12] soc: mediatek: pm-domains: Add support for mt8183

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Date:   Fri, 25 Sep 2020 11:07:35 +0200
From:   Matthias Brugger <mbrugger@...e.com>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Collabora Kernel ML <kernel@...labora.com>,
        Fabien Parent <fparent@...libre.com>,
        Nicolas Boichat <drinkcat@...omium.org>, weiyi.lu@...iatek.com,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 11/12] soc: mediatek: pm-domains: Add support for mt8183



On 25/09/2020 10:21, Enric Balletbo i Serra wrote:
> Hi Hsin-Yi and Matthias,
> 
> Hsin-Yi, many thanks to provide the register names.
> 
> On 25/9/20 9:37, Hsin-Yi Wang wrote:
>> On Wed, Sep 16, 2020 at 8:19 PM Matthias Brugger <matthias.bgg@...il.com> wrote:
>>>
>>>
>>>
>>> On 16/09/2020 11:46, Matthias Brugger wrote:
>>>>
>>>>
>>>> On 10/09/2020 19:28, Enric Balletbo i Serra wrote:
>>>>> From: Matthias Brugger <mbrugger@...e.com>
>>>>>
>>>>> Add the needed board data to support mt8183 SoC.
>>>>>
>>>>> Signed-off-by: Matthias Brugger <mbrugger@...e.com>
>>>>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>>>>> ---
>>>>>
>>>>>    drivers/soc/mediatek/mtk-pm-domains.c | 162 ++++++++++++++++++++++++++
>>>>>    include/linux/soc/mediatek/infracfg.h |  28 +++++
>>>>>    2 files changed, 190 insertions(+)
>>>>>
>>>>> diff --git a/drivers/soc/mediatek/mtk-pm-domains.c
>>>>> b/drivers/soc/mediatek/mtk-pm-domains.c
>>>>> index 29e88adc8ea6..aa434f616fee 100644
>>>>> --- a/drivers/soc/mediatek/mtk-pm-domains.c
>>>>> +++ b/drivers/soc/mediatek/mtk-pm-domains.c
>>>> [...]
>>>>> +/*
>>>>> + * MT8183 power domain support
>>>>> + */
>>>>> +static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
>>>>> +    [MT8183_POWER_DOMAIN_AUDIO] = {
>>>>> +        .sta_mask = PWR_STATUS_AUDIO,
>>>>> +        .ctl_offs = 0x0314,
>>>>> +        .sram_pdn_bits = GENMASK(11, 8),
>>>>> +        .sram_pdn_ack_bits = GENMASK(15, 12),
>>>>> +    },
>>>>> +    [MT8183_POWER_DOMAIN_CONN] = {
>>>>> +        .sta_mask = PWR_STATUS_CONN,
>>>>> +        .ctl_offs = 0x032c,
>>>>> +        .sram_pdn_bits = 0,
>>>>> +        .sram_pdn_ack_bits = 0,
>>>>> +        .bp_infracfg = {
>>>>> +            BUS_PROT_WR(MT8183_TOP_AXI_PROT_EN_CONN, 0x2a0, 0x2a4, 0x228),
>>>>
>>>> We have repeating values triplets for set, clear and status register in infracfg
>>>> and SMI.
>>>>
>>>> Weiyi can you help to get names to this registers? I wasn't able to find
>>>> anything in the datasheet.
>>>
>>> I think for the infracfg part I figured it out:
>>>
>>> #define INFRA_TOPAXI_PROTECTEN_SET      0x2a0
>>> #define INFRA_TOPAXI_PROTECTEN_CLR      0x2a4
>>> #define INFRA_TOPAXI_PROTECTEN_STA1     0x228
>>>
>>> #define INFRA_TOPAXI_PROTECTEN_1_SET    0x2a8
>>> #define INFRA_TOPAXI_PROTECTEN_1_CLR    0x2ac
>>> #define INFRA_TOPAXI_PROTECTEN_STA1_1   0x258
>>>
>>> #define INFRA_TOPAXI_PROTECTEN_MCU_SET  0x2d4
>>> #define INFRA_TOPAXI_PROTECTEN_MCU_CLR  0x2d8
>>> #define INFRA_TOPAXI_PROTECTEN_MM_STA1  0x2ec

These three should be:
INFRA_TOPAXI_PROTECTEN_MM_SET 0x2d4
INFRA_TOPAXI_PROTECTEN_MM_CLR 0x2d8
INFRA_TOPAXI_PROTECTEN_MM_STA1 0x2ec

>>>
> 
> I think this is SoC specific, right? So, I should add the MT8183_ prefix.
> 

It seems like in newer SoCs infracfg register map has changed the layout for 
INFRA_TOPAXI_PROTECTEN_SET and INFRA_TOPAXI_PROTECTEN_CLR registers. Apart from 
that it got expanded to be able to use bus protection on more HW blocks.

So not sure if MT8183_ is the right prefix. Maybe we should just rename 
INFRA_TOPAXI_PROTECTEN_SET to something like INFRA_TOPAXI_PROTECTEN_SET_V2 and 
do the same for INFRA_TOPAXI_PROTECTEN_CLR

Regards,
Matthias

>>> Weiyi, can you still provide the register names for the SMI?
>>>
>>> Thanks in advance!
>>> Matthias
>>>
>> Hi Matthias,
>>
>> SMI names are
>> #define SMI_COMMON_CLAMP_EN 0x3c0
>> #define SMI_COMMON_CLAMP_EN_SET 0x3c4
>> #define SMI_COMMON_CLAMP_EN_CLR 0x3c8
>>
> 
> The same here, this is specific for MT8183, right?
> 
> Thanks,
>    Enric
> 
>> Thanks
>>
>