RE: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support

["Peng Fan (OSS)" <peng.fan@oss.nxp.com>]

> Subject: Re: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support
> 
> On Tue, Jun 29, 2021 at 1:56 AM Peng Fan (OSS) <peng.fan@oss.nxp.com>
> wrote:
> >
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > V8:
> > Revert one change in v7, force goto disable_clk for handshake when
> > power on in patch 3 One minor update to use if{} else {}, not if{};
> > if{}; in patch 3 Typo Hankshake->Handshake
> >
> I am using ATF, branch lf_v2.4, from the NXP code aurora repo with U-Boot
> v2021.07-rc5
> 
> I applied this patch against linux-next, I applied the pgc patches [1], and the
> suggested power-domains to the otg1 and otg2 nodes.
> I am able to boot the device and use USB, but with this applied, I cannot wake
> from sleep.  If I revert this, the system wakes from sleep again.

I just tried linux-next without this patch on iMX8MM EVK, suspend/resume
not work. Per my last test, it works before. Not sure what changed in kernel.

Which kernel are you using, any commit or git repo? I could try on imx8mm
evk and debug the issue you see.

Thanks,
Peng.

> 
> [1] -
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatch
> work.kernel.org%2Fproject%2Flinux-arm-kernel%2Fpatch%2F202106041110
> 05.6804-1-peng.fan%40oss.nxp.com%2F&amp;data=04%7C01%7Cpeng.fan%
> 40nxp.com%7Caccded5458c049d67fa308d93b0182d9%7C686ea1d3bc2b4c6
> fa92cd99c5c301635%7C0%7C0%7C637605699944911752%7CUnknown%7C
> TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL
> CJXVCI6Mn0%3D%7C1000&amp;sdata=Kf6orRXmScWHDTgD2FOV8OBsgG0p
> GVs1byVZTHT0gVI%3D&amp;reserved=0
> 
> I have not enabled video, GPU, VPU nor CSI.
> 
> Just in case there might be a power-domain dependency missing, here is my
> power-domain dump:
> 
> root@beacon-imx8mm-kit:~# cat
> /sys/kernel/debug/pm_genpd/pm_genpd_summary
> domain                          status          children
>             performance
>     /device                                             runtime
> status
> ---------------------------------------------------------------------------------------------
> -
> vpu-h1                          off-0
>             0
> 
> VPU_BLK_CTL_H1
>     /devices/genpd:3:imx-vpumix-blk-ctl.2               suspended
>             0
> vpu-g2                          off-0
>             0
> 
> VPU_BLK_CTL_G2
>     /devices/genpd:2:imx-vpumix-blk-ctl.0               suspended
>             0
> vpu-g1                          off-0
>             0
> 
> VPU_BLK_CTL_G1
>     /devices/genpd:1:imx-vpumix-blk-ctl.1               suspended
>             0
> mipi                            off-0
>             0
>                                                 MIPI_DSI,
> MIPI_CSI
>     /devices/genpd:1:imx-dispmix-blk-ctl.2              suspended
>             0
>     /devices/genpd:1:imx-dispmix-blk-ctl.3              suspended
>             0
> vpumix                          off-0
>             0
> 
> VPU_BLK_CTL_BUS
>     /devices/genpd:0:imx-vpumix-blk-ctl.3               suspended
>             0
> gpu                             off-0
>             0
> VPU_BLK_CTL_BUS                 off-0
>             0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.7
>  suspended                  0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.8
>  suspended                  0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.9
>  suspended                  0
> VPU_BLK_CTL_H1                  off-0
>             0
> VPU_BLK_CTL_G1                  off-0
>             0
> VPU_BLK_CTL_G2                  off-0
>             0
> DISPMIX_BUS                     off-0
>             0
>                                                 CSI_BRIDGE,
> LCDIF
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.11
>  suspended                  0
> MIPI_CSI                        off-0
>             0
> MIPI_DSI                        off-0
>             0
> LCDIF                           off-0
>             0
> CSI_BRIDGE                      off-0
>             0
> dispmix                         off-0
>             0
>                                                 DISPMIX_BUS
>     /devices/genpd:0:imx-dispmix-blk-ctl.4              suspended
>             0
> gpumix                          off-0
>             0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.5
>  suspended                  0
> usb-otg2                        on
>             0
>     /devices/platform/soc@0/32c00000.bus/32e50000.usb   active
>             0
> usb-otg1                        on
>             0
>     /devices/platform/soc@0/32c00000.bus/32e40000.usb   active
>             0
> pcie                            off-0
>             0
> hsiomix                         on
>             0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.1
>  suspended                  0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.2
>  active                     0
> 
> /devices/platform/soc@0/30000000.bus/303a0000.gpc/imx-pgc-domain.3
>  active                     0
> 
> 
> 
> > V7:
> >  patch 2: update patch title per Shawn  Patch 3: Addressed several
> > comments from Shawn
> >
> > V6:
> >  Thanks for Adam's report on V5.
> >  Resolve the error message dump, it is the child device reuse  the
> > parent device node and matches the parent driver.
> >  Filled the remove function for child device.
> >  A diff dts file for upstream:
> >
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgist
> > .github.com%2FMrVan%2Fd73888d8273c43ea4a3b28fa668ca1d0&amp;dat
> a=04%7C0
> >
> 1%7Cpeng.fan%40nxp.com%7Caccded5458c049d67fa308d93b0182d9%7C68
> 6ea1d3bc
> >
> 2b4c6fa92cd99c5c301635%7C0%7C0%7C637605699944911752%7CUnknow
> n%7CTWFpbG
> >
> Zsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6
> Mn0%
> >
> 3D%7C1000&amp;sdata=9FcnPd4nwmdjOqrQCTz0YNgUmVQ9UzTHpfh33LKI
> 7cs%3D&amp
> > ;reserved=0
> >
> > V5:
> >  Rework the blk-ctl driver to let sub-PGC use blk-ctl as parent power
> > domain to fix the potential handshake issue.
> >  I still keep R-b/A-b tag for Patch 1,2,4, since very minor changes  I
> > only drop R-b tag for Patch 3, since it has big change.
> >  An example, the pgc_mipi not take pgc_dispmix as parent:
> >
> >         pgc_dispmix: power-domain@10 {
> >                 #power-domain-cells = <0>;
> >                 reg = <IMX8MM_POWER_DOMAIN_DISPMIX>;
> >                 clocks = <&clk IMX8MM_CLK_DISP_ROOT>,
> >                          <&clk IMX8MM_CLK_DISP_AXI_ROOT>,
> >                          <&clk IMX8MM_CLK_DISP_APB_ROOT>;
> >         };
> >
> >         pgc_mipi: power-domain@11 {
> >                 #power-domain-cells = <0>;
> >                 reg = <IMX8MM_POWER_DOMAIN_MIPI>;
> >                 power-domains = <&dispmix_blk_ctl
> IMX8MM_BLK_CTL_PD_DISPMIX_BUS>;
> >         };
> >
> >         dispmix_blk_ctl: clock-controller@32e28000 {
> >                 compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon";
> >                 reg = <0x32e28000 0x100>;
> >                 #power-domain-cells = <1>;
> >                 power-domains = <&pgc_dispmix>, <&pgc_mipi>;
> >                 power-domain-names = "dispmix", "mipi";
> >                 clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk
> IMX8MM_CLK_DISP_AXI_ROOT>,
> >                          <&clk IMX8MM_CLK_DISP_APB_ROOT>;
> >         };
> >
> > V4:
> >  Add R-b tag
> >  Typo fix
> >  Update the power domain macro names Per Abel and Frieder
> >
> > V3:
> >  Add explaination for not listing items in patch 2 commit log Per Rob.
> >  Addressed comments from Lucas and Frieder on patch [3,4].
> >  A few comments from Jacky was ignored, because following gpcv2
> > coding style.
> >
> > V2:
> >  Fix yaml check failure.
> >
> > Previously there is an effort from Abel that take BLK-CTL as clock
> > provider, but it turns out that there is A/B lock issue and we are not
> > able resolve that.
> >
> > Per discuss with Lucas and Jacky, we made an agreement that take
> > BLK-CTL as a power domain provider and use GPC's domain as parent, the
> > consumer node take BLK-CTL as power domain input.
> >
> > This patchset has been tested on i.MX8MM EVK board, but one hack is
> > not included in the patchset is that the DISPMIX BLK-CTL
> > MIPI_M/S_RESET not implemented. Per Lucas, we will finally have a MIPI
> > DPHY driver, so fine to leave it.
> >
> > Thanks for Lucas's suggestion, Frieder Schrempf for collecting all the
> > patches, Abel's previous BLK-CTL work, Jacky Bai on help debug issues.
> >
> >
> > Peng Fan (4):
> >   dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
> >   dt-bindings: soc: imx: Add bindings for i.MX BLK_CTL
> >   soc: imx: Add generic blk-ctl driver
> >   soc: imx: Add blk-ctl driver for i.MX8MM
> >
> >  .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     |  66 ++++
> >  drivers/soc/imx/Makefile                      |   2 +-
> >  drivers/soc/imx/blk-ctl-imx8mm.c              | 139 ++++++++
> >  drivers/soc/imx/blk-ctl.c                     | 324
> ++++++++++++++++++
> >  drivers/soc/imx/blk-ctl.h                     |  85 +++++
> >  include/dt-bindings/power/imx8mm-power.h      |  13 +
> >  6 files changed, 628 insertions(+), 1 deletion(-)  create mode 100644
> > Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> >  create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c  create mode
> > 100644 drivers/soc/imx/blk-ctl.c  create mode 100644
> > drivers/soc/imx/blk-ctl.h
> >
> > --
> > 2.30.0
> >