[PATCH v5 0/3] Add eDP support for RK3568

[Damon Ding <damon.ding@rock-chips.com>]

Picked from:
https://lore.kernel.org/all/20261030064905.2248999-1-damon.ding@rock-chips.com/

The 'rockchip,rk3568-edp' display binding, the RK3568 support for the
Analogix DP bridge driver and the RK3568 support for the Rockchip
Analogix DP driver have been applied to the drm-misc-next tree.

PATCH 1 is to document the RK3568 eDP Transmitter PHY with Naneng IP
        block, along with the eDP PHY GRF syscon node it resides in.
PATCH 2 is to add the driver for the Rockchip eDP Transmitter PHY with
        Naneng IP block.
PATCH 3 is to add the eDP controller and eDP PHY nodes for the RK3568
        SoCs.

Tested on RK3568 EVB1 board with LG eDP panel LP079QX1-SP0V.

&edp {
  avdd-0v9-supply = <&vdda0v9_image>;
  avdd-1v8-supply = <&vcca1v8_image>;
  force-hpd;
  status = "okay";

  aux-bus {
    panel {
      compatible = "edp-panel";
      backlight = <&backlight>;
      power-supply = <&vcc3v3_lcd0_n>;
      no-hpd;

      port {
        panel_in_edp: endpoint {
          remote-endpoint = <&edp_out_panel>;
        };
      };
    };
  };
};

&edp_in {
  edp_in_vp0: endpoint {
    remote-endpoint = <&vp0_out_edp>;
  };
};

&edp_out {
  edp_out_panel: endpoint {
    remote-endpoint = <&panel_in_edp>;
  };
};

&edp_phy {
  status = "okay";
};

&vp0 {
  vp0_out_edp: endpoint@ROCKCHIP_VOP2_EP_EDP0 {
    reg = <ROCKCHIP_VOP2_EP_EDP0>;
    remote-endpoint = <&edp_in_vp0>;
  };
};

Damon Ding (3):
  dt-bindings: phy: Add rockchip,rk3568-edp-phy
  phy: rockchip: Add support for Naneng eDP phy
  arm64: dts: rockchip: rk356x: Add eDP controller and phy nodes

 .../bindings/phy/rockchip,rk3568-edp-phy.yaml |  46 ++
 .../rockchip/rockchip,rk3568-edp-phy-grf.yaml |  80 +++
 arch/arm64/boot/dts/rockchip/rk356x-base.dtsi |  45 ++
 drivers/phy/rockchip/Kconfig                  |  11 +
 drivers/phy/rockchip/Makefile                 |   1 +
 .../phy/rockchip/phy-rockchip-naneng-edp.c    | 471 ++++++++++++++++++
 6 files changed, 654 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/rockchip,rk3568-edp-phy.yaml
 create mode 100644 Documentation/devicetree/bindings/soc/rockchip/rockchip,rk3568-edp-phy-grf.yaml
 create mode 100644 drivers/phy/rockchip/phy-rockchip-naneng-edp.c

---

Changes in v2:
- Apply the lane-dependent TX configurations in set_lanes() instead of
  set_rate(), and store the lane count for set_voltages(), since the
  Analogix DP core issues separate phy_configure() calls and the lane
  count is only valid in the set_lanes/set_voltages calls. (Sashiko)
- Initialize val to zero in rockchip_edp_phy_enabled() to avoid using
  an uninitialized variable when regmap_read() fails. (Sashiko)
- Fail the probe when the chip data requires GRF configurations while
  the "rockchip,grf" property is missing. (Sashiko)
- Rebase onto latest drm-misc-next tree.

Changes in v3:
- Restore the PHY related changes which were missing in v2 for
  unexpected reasons.

Changes in v4:
- Restrict the avdd-0v9 and avdd-1v8 supplies to the RK3568 compatible
  in the Rockchip Analogix DP binding.
- Add the reg entry for the PHY node and the ranges/#address-cells/
  #size-cells for the parent syscon node in the Rockchip GRF schema.
- Map the PHY registers from its own reg property instead of accessing
  them through the parent syscon regmap.
- Model the PHY node with a reg property under the parent syscon in the
  DT.

Changes in v5:
- Move the APB clock (PCLK_EDPPHY_GRF) from the parent syscon node to
  the PHY node and enable it in the driver. (Sashiko)
- Split the "rockchip,rk3568-edp-phy-grf" syscon node to its own
  binding schema, instead of extending the shared Rockchip GRF schema.
- Validate the voltages against the effective lane count, to also
  cover combined set_lanes + set_voltages requests. (Sashiko)
- Select REGMAP_MMIO.
- Drop the example from the PHY binding schema, as complete MFD
  examples belong in the GRF binding schema.
- Rename the reference clock to "ref".

-- 
2.34.1