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Subject[PATCH 0/8] Add support for drm/rockchip to dynamically control the DDR frequency.
Date
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.

Waiting for your feedback.

Best regards,
Enric

Changes in v1:
- [RFC 1/10] Add Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
- [RFC 1/10] s/Generic/General/ (Robin Murphy)
- [RFC 2/10] Add reviewed and acked tags from Chanwoo Choi and Rob Herring
- [RFC 3/10] Add an explanation for platform SIP calls.
- [RFC 3/10] Change if statement for a switch.
- [RFC 3/10] Rename ddr_flag to odt_enable to be more clear.
- [RFC 4/10] Removed from the series. I did not found a use case where not holding the mutex causes the issue.
- [RFC 7/10] Removed from the series. I did not found a use case where this matters.
- [RFC 8/10] Move rk3399-dram.h to dt-includes.
- [RFC 8/10] Put sdram default values under the dmc node.
- [RFC 8/10] Removed rk3399-dram-default-timing.dts

Derek Basehore (2):
devfreq: rk3399_dmc / clk: rockchip: Sync with vblank in the kernel
for DDRfreq.
devfreq: rk3399_dmc / clk: rockchip: Disable DDR clk timeout on
suspend.

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 (2):
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 +
arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi | 21 ++
.../boot/dts/rockchip/rk3399-op1-opp.dtsi | 29 +++
arch/arm64/boot/dts/rockchip/rk3399.dtsi | 51 ++++-
drivers/clk/rockchip/clk-ddr.c | 157 +++++++++++--
drivers/clk/rockchip/clk.c | 2 +-
drivers/clk/rockchip/clk.h | 3 +-
drivers/devfreq/event/rockchip-dfi.c | 23 +-
drivers/devfreq/rk3399_dmc.c | 209 +++++++++++++++---
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 +++
include/dt-bindings/power/rk3399-dram.h | 73 ++++++
include/soc/rockchip/rk3399_dmc.h | 42 ++++
include/soc/rockchip/rk3399_grf.h | 21 ++
include/soc/rockchip/rockchip_sip.h | 1 +
18 files changed, 704 insertions(+), 70 deletions(-)
create mode 100644 drivers/devfreq/rk3399_dmc_priv.h
create mode 100644 include/dt-bindings/power/rk3399-dram.h
create mode 100644 include/soc/rockchip/rk3399_dmc.h
create mode 100644 include/soc/rockchip/rk3399_grf.h

--
2.18.0

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