[RFC PATCH 0/4] rk3399 support ddr frequency scaling

Lin Huang
2016-06-01T09:35:35Z

rk3399 platform have dfi controller can monitor ddr load,
and dcf controller to handle ddr register so we can get the
right ddr frequency and make ddr controller happy work(which
will implement in bl31). So we do ddr frequency scaling with
following flow:

kernel bl31

monitor ddr load
|
|
get_target_rate
|
| pass rate to bl31
clk_set_rate(ddr) --------------------->run dcf flow
| |
| |
wait dcf interrupt<-------------------trigger dcf interrupt
|
|
return

Lin Huang (4):
rockchip: rockchip: add new clock-type for the ddrclk
clk: rockchip: rk3399: add ddrc clock support
PM / devfreq: rockchip: add devfreq driver for rk3399 dmc
drm/rockchip: Add dmc notifier in vop driver

drivers/clk/rockchip/Makefile | 1 +
drivers/clk/rockchip/clk-ddr.c | 147 ++++++++++
drivers/clk/rockchip/clk-rk3399.c | 16 +
drivers/clk/rockchip/clk.c | 9 +
drivers/clk/rockchip/clk.h | 27 ++
drivers/devfreq/Kconfig | 2 +-
drivers/devfreq/Makefile | 1 +
drivers/devfreq/rockchip/Kconfig | 14 +
drivers/devfreq/rockchip/Makefile | 2 +
drivers/devfreq/rockchip/rk3399_dmc.c | 438 ++++++++++++++++++++++++++++
drivers/devfreq/rockchip/rockchip_dmc.c | 132 +++++++++
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 51 +++-
include/dt-bindings/clock/rk3399-cru.h | 1 +
include/soc/rockchip/rockchip_dmc.h | 44 +++
14 files changed, 882 insertions(+), 3 deletions(-)
create mode 100644 drivers/clk/rockchip/clk-ddr.c
create mode 100644 drivers/devfreq/rockchip/Kconfig
create mode 100644 drivers/devfreq/rockchip/Makefile
create mode 100644 drivers/devfreq/rockchip/rk3399_dmc.c
create mode 100644 drivers/devfreq/rockchip/rockchip_dmc.c
create mode 100644 include/soc/rockchip/rockchip_dmc.h

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1.9.1