[PATCH 0/4] Move DP phy switch to PHY driver

Chris Zhong zyw at rock-chips.com
Thu Feb 9 23:44:10 PST 2017

There are 2 Type-c PHYs in RK3399, but only one DP controller. Hence
only one PHY can connect to DP controller at one time, the other should
be disconnected. The GRF_SOC_CON26 register has a switch bit to do it,
set this bit means enable PHY 1, clear this bit means enable PHY 0.

If the board has 2 Type-C ports, the DP driver get the phy id from
devm_of_phy_get_by_index, and then control this switch according to
this id. But some others board only has one Type-C port, it may be PHY 0
or PHY 1. The dts node id can not tell us the correct PHY id. Hence move
this switch to PHY driver, the PHY driver can distinguish between PHY 0
and PHY 1, and then write the correct register bit.

Chris Zhong (4):
  Documentation: bindings: add uphy-dp-sel for Rockchip USB Type-C PHY
  arm64: dts: rockchip: add rockchip,uphy-dp-sel for Type-C phy
  phy: rockchip-typec: support DP phy switch
  drm/rockchip: cdn-dp: remove the DP phy switch

 Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt | 5 +++++
 arch/arm64/boot/dts/rockchip/rk3399.dtsi                     | 2 ++
 drivers/gpu/drm/rockchip/cdn-dp-core.c                       | 7 -------
 drivers/phy/phy-rockchip-typec.c                             | 9 +++++++++
 4 files changed, 16 insertions(+), 7 deletions(-)


More information about the Linux-rockchip mailing list