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* [RFC PATCH 00/10] Add support for drm/rockchip to dynamically control the DDR frequency.
@ 2018-05-14 21:16 Enric Balletbo i Serra
  2018-05-14 21:16 ` [RFC PATCH 01/10] devfreq: rockchip-dfi: Move GRF definitions to a common place Enric Balletbo i Serra
                   ` (9 more replies)
  0 siblings, 10 replies; 21+ messages in thread
From: Enric Balletbo i Serra @ 2018-05-14 21:16 UTC (permalink / raw)
  To: MyungJoo Ham, Kyungmin Park, Chanwoo Choi, Rob Herring,
	Will Deacon, Heiko Stuebner, Michael Turquette, Stephen Boyd,
	Sandy Huang, David Airlie
  Cc: linux-pm, linux-kernel, Derek Basehore, linux-clk,
	linux-rockchip, dri-devel, Lin Huang, kernel, Sean Paul,
	linux-arm-kernel, Matthias Kaehlcke, Yakir Yang, Shawn Lin,
	Catalin Marinas, Elaine Zhang, Rafael J. Wysocki, Mark Yao,
	Geert Uytterhoeven, Kever Yang, Brian Norris, Douglas Anderson,
	Jeffy Chen, Nickey Yang, devicetree, Chris Zhong, Caesar Wang,
	Jacob Chen, Shunqian Zheng, Mark Rutland

Dear all,

The rk3399 platform has a DFI controller that can monitor DDR load and a
DMC driver that talks with the TF-A (Trusted Firmware-A) to dynamically
set the DDR frequency with following flow.

             kernel                          Trusted Firmware-A
                                                  (bl31)
        monitor ddr load
                |
                |
        get_target_rate
                |
                |           pass rate to TF-A
        clk_set_rate(ddr) --------------------->run ddr dvs flow
                                                    |
                                                    |
                 <------------------------------end ddr dvs flow
                |
                |
              return

These patches add support for devfreq to dynamically control the DDR
frequency into the drm rockchip driver. By default it uses the
'simple_ondemand' governor which can adjust the frequency based on the
DDR load.

Although the patches were present in the chromeos kernel for long time I
am sending this as a RFC because I have doubts on some of them,
specially patch 4/10 that tries to sync the TF-A with the kernel using a
mutex, to be honest I did not find another way to do it so feedback is
more than welcome.

The patches apply on top of current 4.17-rc5 and depends on the
following series to apply cleanly.

 1. https://lkml.org/lkml/2018/5/9/464
 2. https://lkml.org/lkml/2018/4/23/354

Waiting for your feedback.

Best regards,
 Enric


Derek Basehore (3):
  devfreq: rk3399_dmc / clk: rockchip: Sync with vblank in the kernel
    for DDRfreq.
  devfreq: rk3399_dmc / clk: rockchip: Disable DDR clk timeout on
    suspend.
  clk: rockchip: set clk-ddr to GET_RATE_NOCACHE.

Enric Balletbo i Serra (3):
  devfreq: rockchip-dfi: Move GRF definitions to a common place.
  dt-bindings: devfreq: rk3399_dmc: Add rockchip,pmu phandle.
  devfreq: rk3399_dmc: Pass ODT and auto power down parameters to TF-A.

Lin Huang (3):
  devfreq: rk3399_dmc / rockchip: pm_domains: Register notify to DMC
    driver.
  arm64: dts: rk3399: Add dfi and dmc nodes.
  arm64: dts: rockchip: Enable dmc and dfi nodes on gru.

Sean Paul (1):
  drm: rockchip: Add DDR devfreq support.

 .../bindings/devfreq/rk3399_dmc.txt           |   2 +
 .../rockchip/rk3399-dram-default-timing.dtsi  |  38 ++++
 arch/arm64/boot/dts/rockchip/rk3399-dram.h    |  73 +++++++
 arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi  |  21 ++
 .../boot/dts/rockchip/rk3399-op1-opp.dtsi     |  29 +++
 arch/arm64/boot/dts/rockchip/rk3399.dtsi      |  22 +-
 drivers/clk/rockchip/clk-ddr.c                | 159 ++++++++++++---
 drivers/clk/rockchip/clk.c                    |   2 +-
 drivers/clk/rockchip/clk.h                    |   3 +-
 drivers/devfreq/event/rockchip-dfi.c          |  23 +--
 drivers/devfreq/rk3399_dmc.c                  | 191 +++++++++++++++---
 drivers/devfreq/rk3399_dmc_priv.h             |  16 ++
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c   |  46 +++++
 drivers/gpu/drm/rockchip/rockchip_drm_drv.h   |   9 +
 drivers/gpu/drm/rockchip/rockchip_drm_fb.c    |  35 ++++
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c   |  34 ++++
 drivers/soc/rockchip/pm_domains.c             |  36 ++++
 include/soc/rockchip/rk3399_dmc.h             |  44 ++++
 include/soc/rockchip/rk3399_grf.h             |  21 ++
 include/soc/rockchip/rockchip_sip.h           |   1 +
 20 files changed, 734 insertions(+), 71 deletions(-)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-dram-default-timing.dtsi
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-dram.h
 create mode 100644 drivers/devfreq/rk3399_dmc_priv.h
 create mode 100644 include/soc/rockchip/rk3399_dmc.h
 create mode 100644 include/soc/rockchip/rk3399_grf.h

-- 
2.17.0

^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2018-06-17  0:00 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-14 21:16 [RFC PATCH 00/10] Add support for drm/rockchip to dynamically control the DDR frequency Enric Balletbo i Serra
2018-05-14 21:16 ` [RFC PATCH 01/10] devfreq: rockchip-dfi: Move GRF definitions to a common place Enric Balletbo i Serra
2018-05-14 21:44   ` Chanwoo Choi
2018-05-15 11:23   ` Robin Murphy
2018-05-14 21:16 ` [RFC PATCH 02/10] dt-bindings: devfreq: rk3399_dmc: Add rockchip,pmu phandle Enric Balletbo i Serra
2018-05-14 22:20   ` Chanwoo Choi
2018-05-22 22:45   ` Rob Herring
2018-05-14 21:16 ` [RFC PATCH 03/10] devfreq: rk3399_dmc: Pass ODT and auto power down parameters to TF-A Enric Balletbo i Serra
2018-05-14 22:20   ` Chanwoo Choi
2018-06-16 10:15     ` Enric Balletbo Serra
2018-06-17  0:00       ` Chanwoo Choi
2018-05-14 21:16 ` [RFC PATCH 04/10] devfreq: rk3399_dmc / rockchip: pm_domains: Register notify to DMC driver Enric Balletbo i Serra
2018-05-18  2:44   ` Chanwoo Choi
2018-05-14 21:16 ` [RFC PATCH 05/10] devfreq: rk3399_dmc / clk: rockchip: Sync with vblank in the kernel for DDRfreq Enric Balletbo i Serra
2018-05-14 21:16 ` [RFC PATCH 06/10] devfreq: rk3399_dmc / clk: rockchip: Disable DDR clk timeout on suspend Enric Balletbo i Serra
2018-05-14 21:16 ` [RFC PATCH 07/10] clk: rockchip: set clk-ddr to GET_RATE_NOCACHE Enric Balletbo i Serra
2018-05-15 20:41   ` Stephen Boyd
2018-05-14 21:16 ` [RFC PATCH 08/10] drm: rockchip: Add DDR devfreq support Enric Balletbo i Serra
2018-05-14 21:16 ` [RFC PATCH 09/10] arm64: dts: rk3399: Add dfi and dmc nodes Enric Balletbo i Serra
2018-05-22 22:51   ` Rob Herring
2018-05-14 21:16 ` [RFC PATCH 10/10] arm64: dts: rockchip: Enable dmc and dfi nodes on gru Enric Balletbo i Serra

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