[PATCH v7 00/37] NVIDIA Tegra power management patches for 5.15

[Dmitry Osipenko]

Hello,

This series continues the work on enabling voltage scaling of the core
power domain for NVIDIA Tegra SoCs. All the previous grounding work around
improving OPP API and adding the initial core power domain driver is now
landing into 5.14 kernel and already available in linux-next.

The biggest challenge left so far is the power management of the PLLs
and system clocks which don't have a dedicated hardware unit. I made a lot
of changes around it by going back to a variant where individual device
drivers are responsible for the power management in oppose to a recent
variant where the most of power management was done by the clk controller
driver. This allowed to drop the need of having a special lockdep
annotation for the power domain's mutex, which Ulf Hansson didn't like
previously. We don't have situations of a nested GENPD accesses anymore.
It also allowed to minimize the clk patch a lot. Now clk driver manages
power of the internal clocks only.

This series enables a full power management for Tegra20 and Tegra30 SoCs.
It doesn't include all the device-tree binding patches. I'll try to split
this series into a smaller parts that could be applied individually. For
now I want to get a feedback at least on the first six patches.

Example /sys/kernel/debug/pm_genpd/pm_genpd_summary from Tegra20 Acer A500:

domain                          status          children                           performance
    /device                                             runtime status
----------------------------------------------------------------------------------------------
mpe                             off-0                                              0
    /devices/soc0/50000000.host1x/54040000.mpe          suspended                  0
vdec                            off-0                                              0
    /devices/soc0/6001a000.vde                          suspended                  0
venc                            off-0                                              0
    /devices/soc0/50000000.host1x/54080000.vi           suspended                  0
    /devices/soc0/50000000.host1x/54100000.isp          suspended                  0
3d                              off-0                                              0
    /devices/soc0/50000000.host1x/54180000.gr3d         suspended                  0
core-domain                     on                                                 1100000
                                                3d, venc, vdec, mpe
    /devices/soc0/50000000.host1x                       active                     1100000
    /devices/soc0/50000000.host1x/540c0000.epp          suspended                  0
    /devices/soc0/50000000.host1x/54140000.gr2d         suspended                  0
    /devices/soc0/50000000.host1x/54280000.hdmi         suspended                  0
    /devices/soc0/c5000000.usb                          active                     1100000
    /devices/soc0/c5008000.usb                          active                     1100000
    /devices/soc0/c8000000.mmc                          active                     1000000
    /devices/soc0/c8000400.mmc                          active                     1000000
    /devices/soc0/c8000600.mmc                          active                     1000000
    /devices/soc0/7000f400.memory-controller            active                     1000000
    /devices/platform/tegra_clk_sclk                    active                     950000
    /devices/soc0/50000000.host1x/54200000.dc           active                     950000
    /devices/soc0/50000000.host1x/54240000.dc           suspended                  0


Example /sys/kernel/debug/pm_genpd/pm_genpd_summary from Tegra30 Nexus 7:

domain                          status          children                           performance
    /device                                             runtime status
----------------------------------------------------------------------------------------------
heg                             on                                                 1000000
    /devices/soc0/50000000.host1x                       active                     1000000
    /devices/soc0/50000000.host1x/540c0000.epp          suspended                  0
    /devices/soc0/50000000.host1x/54140000.gr2d         suspended                  0
mpe                             off-0                                              0
    /devices/soc0/50000000.host1x/54040000.mpe          suspended                  0
vdec                            off-0                                              0
    /devices/soc0/6001a000.vde                          suspended                  0
venc                            off-0                                              0
    /devices/soc0/50000000.host1x/54080000.vi           suspended                  0
    /devices/soc0/50000000.host1x/54100000.isp          suspended                  0
3d1                             off-0                                              0
    /devices/genpd:1:54180000.gr3d                      suspended                  0
3d0                             off-0                                              0
    /devices/genpd:0:54180000.gr3d                      suspended                  0
core-domain                     on                                                 1000000
                                                3d0, 3d1, venc, vdec, mpe, heg
    /devices/soc0/7d000000.usb                          active                     1000000
    /devices/soc0/78000400.mmc                          active                     950000
    /devices/soc0/7000f400.memory-controller            active                     1000000
    /devices/soc0/7000a000.pwm                          active                     1000000
    /devices/platform/tegra_clk_pll_c                   active                     1000000
    /devices/platform/tegra_clk_pll_e                   suspended                  0
    /devices/platform/tegra_clk_pll_m                   active                     1000000
    /devices/platform/tegra_clk_sclk                    active                     1000000
    /devices/soc0/7000f800.fuse                         suspended                  0
    /devices/soc0/50000000.host1x/54240000.dc           suspended                  0
    /devices/soc0/50000000.host1x/54200000.dc           active                     1000000

Dmitry Osipenko (37):
  soc/tegra: pmc: Temporarily disable PMC state syncing
  soc/tegra: pmc: Implement attach_dev() of power domain drivers
  soc/tegra: Don't print error message when OPPs not available
  soc/tegra: Add devm_tegra_core_dev_init_opp_table_simple()
  dt-bindings: clock: tegra-car: Document new tegra-clocks node
  clk: tegra: Support runtime PM and power domain
  dt-bindings: host1x: Document OPP and power domain properties
  dt-bindings: host1x: Document Memory Client resets of Host1x, GR2D and
    GR3D
  gpu: host1x: Add host1x_channel_stop()
  gpu: host1x: Add runtime PM support
  gpu: host1x: Add stub driver for MPE, VI, EPP and ISP
  drm/tegra: dc: Support OPP and SoC core voltage scaling
  drm/tegra: hdmi: Add OPP support
  drm/tegra: gr2d: Support OPP and power management
  drm/tegra: gr3d: Support OPP and power management
  drm/tegra: vic: Stop channel before suspending
  usb: chipidea: tegra: Add runtime PM support
  bus: tegra-gmi: Add runtime PM support
  pwm: tegra: Add runtime PM and OPP support
  mmc: sdhci-tegra: Add runtime PM and OPP support
  mtd: rawnand: tegra: Add runtime PM support
  soc/tegra: fuse: Clear fuse->clk on driver probe failure
  soc/tegra: fuse: Add runtime PM support
  soc/tegra: fuse: Enable fuse clock on suspend
  clk: tegra: Remove CLK_IS_CRITICAL flag from fuse clock
  spi: tegra20-slink: Improve runtime PM usage
  spi: tegra20-slink: Add OPP support
  memory: tegra20-emc: Add minimal runtime PM support
  memory: tegra30-emc: Add minimal runtime PM support
  media: dt: bindings: tegra-vde: Convert to schema
  media: dt: bindings: tegra-vde: Document OPP and power domain
  media: staging: tegra-vde: Support generic power domain
  ARM: tegra: Add OPP tables and power domains to Tegra20 device-trees
  ARM: tegra: Add OPP tables and power domains to Tegra30 device-trees
  ARM: tegra: Add Memory Client resets to Tegra20 GR2D, GR3D and Host1x
  ARM: tegra: Add Memory Client resets to Tegra30 GR2D, GR3D and Host1x
  soc/tegra: pmc: Enable core domain support on Tegra20 and Tegra30

 .../bindings/clock/nvidia,tegra20-car.yaml    |   51 +
 .../display/tegra/nvidia,tegra20-host1x.txt   |   53 +
 .../bindings/media/nvidia,tegra-vde.txt       |   64 -
 .../bindings/media/nvidia,tegra-vde.yaml      |  119 ++
 .../boot/dts/tegra20-acer-a500-picasso.dts    |    1 +
 arch/arm/boot/dts/tegra20-colibri.dtsi        |    3 +-
 arch/arm/boot/dts/tegra20-harmony.dts         |    3 +-
 arch/arm/boot/dts/tegra20-paz00.dts           |    1 +
 .../arm/boot/dts/tegra20-peripherals-opp.dtsi |  941 +++++++++++
 arch/arm/boot/dts/tegra20-seaboard.dts        |    3 +-
 arch/arm/boot/dts/tegra20-tamonten.dtsi       |    3 +-
 arch/arm/boot/dts/tegra20-trimslice.dts       |    9 +
 arch/arm/boot/dts/tegra20-ventana.dts         |    1 +
 arch/arm/boot/dts/tegra20.dtsi                |  115 +-
 .../tegra30-asus-nexus7-grouper-common.dtsi   |    1 +
 arch/arm/boot/dts/tegra30-beaver.dts          |    1 +
 arch/arm/boot/dts/tegra30-cardhu.dtsi         |    1 +
 arch/arm/boot/dts/tegra30-colibri.dtsi        |   17 +-
 arch/arm/boot/dts/tegra30-ouya.dts            |    1 +
 .../arm/boot/dts/tegra30-peripherals-opp.dtsi | 1412 +++++++++++++++++
 arch/arm/boot/dts/tegra30.dtsi                |  170 +-
 drivers/bus/tegra-gmi.c                       |   44 +-
 drivers/clk/tegra/Makefile                    |    1 +
 drivers/clk/tegra/clk-device.c                |  222 +++
 drivers/clk/tegra/clk-pll.c                   |    2 +-
 drivers/clk/tegra/clk-super.c                 |    2 +-
 drivers/clk/tegra/clk-tegra-periph.c          |    6 +-
 drivers/clk/tegra/clk-tegra20.c               |   39 +-
 drivers/clk/tegra/clk-tegra30.c               |   70 +-
 drivers/clk/tegra/clk.c                       |   66 +
 drivers/clk/tegra/clk.h                       |    2 +
 drivers/gpu/drm/tegra/dc.c                    |   69 +
 drivers/gpu/drm/tegra/dc.h                    |    2 +
 drivers/gpu/drm/tegra/gr2d.c                  |  156 +-
 drivers/gpu/drm/tegra/gr3d.c                  |  401 ++++-
 drivers/gpu/drm/tegra/hdmi.c                  |    9 +-
 drivers/gpu/drm/tegra/vic.c                   |   15 +
 drivers/gpu/host1x/channel.c                  |    8 +
 drivers/gpu/host1x/debug.c                    |   15 +
 drivers/gpu/host1x/dev.c                      |  184 ++-
 drivers/gpu/host1x/dev.h                      |    3 +-
 drivers/gpu/host1x/hw/channel_hw.c            |   44 +-
 drivers/gpu/host1x/intr.c                     |    3 -
 drivers/gpu/host1x/syncpt.c                   |    5 +-
 drivers/memory/tegra/tegra20-emc.c            |   31 +
 drivers/memory/tegra/tegra30-emc.c            |   31 +
 drivers/mmc/host/sdhci-tegra.c                |   81 +-
 drivers/mtd/nand/raw/tegra_nand.c             |   44 +-
 drivers/pwm/pwm-tegra.c                       |  104 +-
 drivers/soc/tegra/common.c                    |    4 +-
 drivers/soc/tegra/fuse/fuse-tegra.c           |   62 +
 drivers/soc/tegra/fuse/fuse-tegra20.c         |   10 +-
 drivers/soc/tegra/fuse/fuse-tegra30.c         |   10 +-
 drivers/soc/tegra/fuse/fuse.h                 |    2 +
 drivers/soc/tegra/pmc.c                       |  164 ++
 drivers/spi/spi-tegra20-slink.c               |   76 +-
 drivers/staging/media/tegra-vde/vde.c         |   59 +-
 drivers/usb/chipidea/ci_hdrc_tegra.c          |   50 +-
 include/linux/host1x.h                        |    1 +
 include/soc/tegra/common.h                    |   13 +
 60 files changed, 4710 insertions(+), 370 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/media/nvidia,tegra-vde.txt
 create mode 100644 Documentation/devicetree/bindings/media/nvidia,tegra-vde.yaml
 create mode 100644 drivers/clk/tegra/clk-device.c

-- 
2.30.2