Re: [v3 3/5] soc: mediatek: pm-domains: Add support for mt8195

From: Chun-Jie Chen
Date: Mon Aug 16 2021 - 21:07:17 EST

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On Fri, 2021-07-30 at 12:20 +0800, Chen-Yu Tsai wrote:
> On Fri, Jul 30, 2021 at 11:13 AM Chun-Jie Chen
> <chun-jie.chen@xxxxxxxxxxxx> wrote:
> >
> > On Tue, 2021-07-20 at 16:51 +0800, Chen-Yu Tsai wrote:
> > > Hi,
> > > On Mon, Jul 5, 2021 at 1:42 PM Chun-Jie Chen <
> > > chun-jie.chen@xxxxxxxxxxxx> wrote:
> > > >
> > > > Add domain control data including bus protection data size
> > > > change due to more protection steps in mt8195.
> > > >
> > > > Signed-off-by: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
> > > > ---
> > > > drivers/soc/mediatek/mt8195-pm-domains.h | 738
> > > > +++++++++++++++++++++++
> > > > drivers/soc/mediatek/mtk-pm-domains.c | 5 +
> > > > drivers/soc/mediatek/mtk-pm-domains.h | 2 +-
> > > > include/linux/soc/mediatek/infracfg.h | 103 ++++
> > > > 4 files changed, 847 insertions(+), 1 deletion(-)
> > > > create mode 100644 drivers/soc/mediatek/mt8195-pm-domains.h
> > > >
> > > > diff --git a/drivers/soc/mediatek/mt8195-pm-domains.h
> > > > b/drivers/soc/mediatek/mt8195-pm-domains.h
> > > > new file mode 100644
> > > > index 000000000000..54bb7af8e9a3
> > > > --- /dev/null
> > > > +++ b/drivers/soc/mediatek/mt8195-pm-domains.h
> > > > @@ -0,0 +1,738 @@
> > > > +/* SPDX-License-Identifier: GPL-2.0-only */
> > > > +/*
> > > > + * Copyright (c) 2021 MediaTek Inc.
> > > > + * Author: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
> > > > + */
> > > > +
> > > > +#ifndef __SOC_MEDIATEK_MT8195_PM_DOMAINS_H
> > > > +#define __SOC_MEDIATEK_MT8195_PM_DOMAINS_H
> > > > +
> > > > +#include "mtk-pm-domains.h"
> > > > +#include <dt-bindings/power/mt8195-power.h>
> > > > +
> > > > +/*
> > > > + * MT8195 power domain support
> > > > + */
> > > > +
> > > > +static const struct scpsys_domain_data
> > > > scpsys_domain_data_mt8195[]
> > > > = {
> > >
> > > The SCPSYS block is not documented in the datasheets available.
> > > However
> > > I did look at all the register and bit offsets and confirmed
> > > nothing
> > > overlapped.
> > >
> > > > diff --git a/drivers/soc/mediatek/mtk-pm-domains.c
> > > > b/drivers/soc/mediatek/mtk-pm-domains.c
> > > > index 2689f02d7a41..12552c9996ac 100644
> > > > --- a/drivers/soc/mediatek/mtk-pm-domains.c
> > > > +++ b/drivers/soc/mediatek/mtk-pm-domains.c
> > > > @@ -20,6 +20,7 @@
> > > > #include "mt8173-pm-domains.h"
> > > > #include "mt8183-pm-domains.h"
> > > > #include "mt8192-pm-domains.h"
> > > > +#include "mt8195-pm-domains.h"
> > > >
> > > > #define MTK_POLL_DELAY_US 10
> > > > #define MTK_POLL_TIMEOUT USEC_PER_SEC
> > > > @@ -576,6 +577,10 @@ static const struct of_device_id
> > > > scpsys_of_match[] = {
> > > > .compatible = "mediatek,mt8192-power-
> > > > controller",
> > > > .data = &mt8192_scpsys_data,
> > > > },
> > > > + {
> > > > + .compatible = "mediatek,mt8195-power-
> > > > controller",
> > > > + .data = &mt8195_scpsys_data,
> > > > + },
> > > > { }
> > > > };
> > > >
> > > > diff --git a/drivers/soc/mediatek/mtk-pm-domains.h
> > > > b/drivers/soc/mediatek/mtk-pm-domains.h
> > > > index 8b86ed22ca56..caaa38100093 100644
> > > > --- a/drivers/soc/mediatek/mtk-pm-domains.h
> > > > +++ b/drivers/soc/mediatek/mtk-pm-domains.h
> > > > @@ -37,7 +37,7 @@
> > > > #define PWR_STATUS_AUDIO BIT(24)
> > > > #define PWR_STATUS_USB BIT(25)
> > > >
> > > > -#define SPM_MAX_BUS_PROT_DATA 5
> > > > +#define SPM_MAX_BUS_PROT_DATA 6
> > > >
> > > > #define _BUS_PROT(_mask, _set, _clr, _sta, _update, _ignore) {
> > > > \
> > > > .bus_prot_mask =
> > > > (_mask), \
> > > > diff --git a/include/linux/soc/mediatek/infracfg.h
> > > > b/include/linux/soc/mediatek/infracfg.h
> > > > index 4615a228da51..3e90fb9b926a 100644
> > > > --- a/include/linux/soc/mediatek/infracfg.h
> > > > +++ b/include/linux/soc/mediatek/infracfg.h
> > > > @@ -2,6 +2,109 @@
> > > > #ifndef __SOC_MEDIATEK_INFRACFG_H
> > > > #define __SOC_MEDIATEK_INFRACFG_H
> > > >
> > > > +#define MT8195_TOP_AXI_PROT_EN_STA1 0x228
> > > > +#define MT8195_TOP_AXI_PROT_EN_1_STA1 0x258
> > > > +#define MT8195_TOP_AXI_PROT_EN_SET 0x2a0
> > > > +#define MT8195_TOP_AXI_PROT_EN_CLR 0x2a4
> > > > +#define MT8195_TOP_AXI_PROT_EN_1_SET 0x2a8
> > > > +#define MT8195_TOP_AXI_PROT_EN_1_CLR 0x2ac
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_SET 0x2d4
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_CLR 0x2d8
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_STA1 0x2ec
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_SET 0x714
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_CLR 0x718
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_STA1 0x724
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_SET 0xb84
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_CLR 0xb88
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_STA1 0xb90
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_SET 0xba4
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_CLR 0xba8
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_STA1 0xbb0
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_2_SET 0xbb8
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_2_CLR 0xbbc
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_2_STA1 0xbc4
> > > > +#define MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_SET 0xbcc
> > > > +#define MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_CLR 0xbd0
> > > > +#define MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_STA1 0xbd8
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_SET 0xdcc
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_CLR 0xdd0
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_STA1 0xdd8
> > >
> > > These all look correct.
> > >
> > > > +#define MT8195_TOP_AXI_PROT_EN_NNA0 BIT(1)
> > > > +#define MT8195_TOP_AXI_PROT_EN_NNA1 BIT(2)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_NNA GENMASK(2,
> > > > 1)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDOSYS0 BIT(6)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VPPSYS0 BIT(10)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MFG1 BIT(11)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MFG1_2ND GENMASK(
> > > > 22,
> > > > 21)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VPPSYS0_2ND BIT(23)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_1_MFG1 GENMASK(20,
> > > > 19)
> > > > +#define MT8195_TOP_AXI_PROT_EN_1_CAM BIT(22)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_CAM BIT(0)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_2_MFG1_2ND GENMASK(6,
> > > > 5)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_MFG1 BIT(7)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_AUDIO_ASRC (BIT(8)
> > > > |
> > > > BIT(17))
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_AUDIO (BIT(9)
> > > > |
> > > > BIT(11))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_2_ADSP (BIT(12) |
> > > > GENMASK(16, 14))
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_NNA0_2ND BIT(19)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_NNA1_2ND BIT(20)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_2_NNA_2ND GENMASK(20,
> > > > 19)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_NNA0 BIT(21)
> > > > +#define MT8195_TOP_AXI_PROT_EN_2_NNA1 BIT(22)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_2_NNA GENMASK(22,
> > > > 21)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_CAM (BIT(0)
> > > > |
> > > > BIT(2) | BIT(4))
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_IPE BIT(1)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_IMG (BIT(1)
> > > > |
> > > > BIT(3))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VPPSYS0 (GENMASK(2,
> > > > 0) | GENMASK(8, 6) | \
> > > > + GENMASK
> > > > (12,
> > > > 10) | GENMASK(21, 19) | \
> > > > + BIT(31)
> > > > )
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VDOSYS0 (GENMASK(5,
> > > > 3) | BIT(9) | \
> > > > + GENMASK
> > > > (14,
> > > > 13) | GENMASK(21, 17) | \
> > > > + BIT(30)
> > > > )
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VPPSYS1 GENMASK(8,
> > > > 5)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VENC (BIT(9)
> > > > |
> > > > BIT(11))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VENC_CORE1 (BIT(10) |
> > > > BIT(12))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VDEC0 BIT(13)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VDEC1 BIT(14)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VDOSYS1_2ND BIT(22)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VPPSYS1_2ND BIT(23)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_CAM_2ND BIT(24)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_IMG_2ND BIT(25)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VENC_2ND BIT(26)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_WPESYS BIT(27)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VDEC0_2ND BIT(28)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_VDEC1_2ND BIT(29)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VDOSYS0_2ND GENMASK(29,
> > > > 22)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_VDOSYS1 GENMASK(31,
> > > > 30)
> > >
> > > There's significant overlap within this block. This means when
> > > the
> > > base
> > > VDOSYS0 power domain is on, all the overlapped protection bits
> > > get
> > > turned
> > > off. I'm not sure that's correct.
> > >
> > > Same goes for IMG, which overlaps with IPE.
> > >
> >
> > Because the timing of enable & disable protection are different, we
> > duplicate some control bit in different power domain.
> >
> > For example: IMG & IPE are parent and child relation, so IMG must
> > power
> > on before IPE, IPE must power off before IMG.
> > We want to clear some bits (protection disable) when power on IMG
> > and
> > set some bits (protection enable) when power off IPE.
>
> Could you add that as a comment? Otherwise it just looks weird.
> And if some change related to the power sequencing order resulted
> in the system hanging, we might not spot it so easily.
>
> Thanks
> ChenYu
>

Some protection steps are redundant in parent power domain, I will
remove these duplicate steps if these can be handled in child power
domain. Thanks for your kindly reminder.

Best Regards,
Chun-Jie

> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_VPPSYS0_2ND (GENMASK
> > > > (7,
> > > > 0) | GENMASK(18, 11))
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VENC BIT(2)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VENC_CORE1 (BIT(3)
> > > > |
> > > > BIT(15))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_CAM (BIT(5)
> > > > |
> > > > BIT(17))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_VPPSYS1 (GENMASK(7,
> > > > 6) | BIT(18))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_VPPSYS0 (GENMASK(9,
> > > > 8) | GENMASK(22, 21) | BIT(24))
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDOSYS1 BIT(10)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDEC2_2ND BIT(12)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDEC0_2ND BIT(13)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_WPESYS_2ND BIT(14)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_IMG BIT(16)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_IPE BIT(16)
> > >
> > > And here, IMG and IPE are the same.
> > >
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDEC2 BIT(21)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDEC0 BIT(22)
> > > > +#define MT8195_TOP_AXI_PROT_EN_MM_2_VDOSYS0 BIT(23)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_MM_2_WPESYS GENMASK(24,
> > > > 23)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_EPD_TX BIT(1)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_DP_TX BIT(2)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_VDNR_PCIE_MAC_P0 (BIT(11)
> > > > |
> > > > BIT(28))
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_VDNR_PCIE_MAC_P1 (BIT(12)
> > > > |
> > > > BIT(29))
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_PCIE_MAC_P0 BIT(13)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_1_PCIE_MAC_P1 BIT(14)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_MFG1 (BIT(17) |
> > > > BIT(19))
> > > > +#define MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_VPPSYS0 BIT(20)
> > > > +#define MT8195_TOP_AXI_PROT_EN_SUB_INFRA_VDNR_VDOSYS0 BIT(21)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_2_NNA0 BIT(25)
> > > > +#define MT8195_TOP_AXI_PROT_EN_VDNR_2_NNA1 BIT(26)
> > > > +#define
> > > > MT8195_TOP_AXI_PROT_EN_VDNR_2_NNA GENMASK(26,
> > > > 25)
> > > > +
> > >
> > > All these MT8195_TOP_AXI_PROT_EN_* bit offsets aren't documented.
> > > Besides
> > > the huge overlap above, it seems NNA also includes NNA0 and NNA1.
> > >
> > >
> > > Regards
> > > ChenYu
> > >
> >
> > The detail of MT8195_TOP_AXI_PROT_EN_* bit is related to the bus
> > design, so we don't descript the detail in datasheet.
> >
> > I will remove the unused power domain and data (like NNA) because
> > these
> > are not used in 8195 chrome project.
> >
> > Best Regards,
> > Chun-Jie
> >
> > >
> > > > #define MT8192_TOP_AXI_PROT_EN_STA1 0x228
> > > > #define MT8192_TOP_AXI_PROT_EN_1_STA1 0x258
> > > > #define MT8192_TOP_AXI_PROT_EN_SET 0x2a0
> > > > --
> > > > 2.18.0
> > > > _______________________________________________
> > > > Linux-mediatek mailing list
> > > > Linux-mediatek@xxxxxxxxxxxxxxxxxxx
> > > >
> >
> >
https://urldefense.com/v3/__http://lists.infradead.org/mailman/listinfo/linux-mediatek__;!!CTRNKA9wMg0ARbw!3jALcSgob2IQknQnQlIPVKd79QdKmXI1Y9X7kaQ2KR8AYdyP0V8Km3u_Cfq8VPMJ4-zn$
> > > >

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