Add DisplayPort support for QCS615 platform

This series aims to extend the USB-C PHY to support DP mode and enable
DisplayPort on the Qualcomm QCS615 platform.

The devicetree modification for DisplayPort on QCS615 will be provided
in a future patch.

Signed-off-by: Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>
---
Changes in v6:
- Move usb3dpphy_reset_l definition to the patch adding compatible and related config data. [Dmitry]
- Add NOTE about SW_PORTSELECT/orientation handling. [Dmitry]
- Use C99-style loop variable declaration in msm_dp_link_lane_map. [Rob]
- Update commit msg with issue description for [05/14, 06/14, 07/14，12/14].
- Link to v5: https://lore.kernel.org/r/20250919-add-displayport-suppor...

Changes in v5:
- Add new patch to introduce QSERDES v2 COM/TXRX register headers.
- Restore legacy reset & clock register logic. [Dmitry]
- Update phy_xlate() to return ERR_PTR(-ENODEV) when dp_phy is NULL. [Dmitry]
- Rename helper from qmp_check_mutex_phy() to qmp_usbc_check_phy_status(). [Dmitry]
- Drop storing struct device *dev in dp_link as it is only used once. [Dmitry]
- Add robust lane mapping: default 1:1, complete partial configs. [Dmitry]
- Reorganize sub-patches v5[07/14， 08/14, 11/14， 12/14] as suggested.
- Link to v4: https://lore.kernel.org/all/20250911-add-displayport-supp...

Changes in v4:
- Drop patch v3[01/14 & 13/14], will sutbmit new patchsets based mst dt binding series.
- Update maintainer of qcom,qcs615-qmp-usb3dp-phy.yaml to myself.
- Add missing aux and pipe clocks. [Dmitry]
- Drop second TCSR phandle; register offsets are described directly. [Dmitry]
- Add USBC PHY series related init_load_uA configs. [Dmitry]
- Drop v3[04/14] qmp_phy_usbc_type define and use dp_serdes offsets to confirm DP capability [Dmitry]
- Reorganize sub-patches as suggested.
- Link to v3: https://lore.kernel.org/all/20250820-add-displayport-supp...

Changes in v3:
- Renamed qcom,qcs615-qmp-dp-phy.yaml in v2 to qcom,qcs615-qmp-dp-phy.yaml in v3 for QCS615 USB3+DP PHY.
- Updated patch v3[02/14] to revise binding title, description, and property order. [Krzysztof]
- Updated commit messages in patch v3[01/14] and [13/14] to reflect the DTSI rename and clarify compatibility. [Krzysztof]
- Added USB3+DP mode implementation in patches v3 [003–012], organized in logical chunks. [Dmitry]
- Dropped patch v2[03/13] to maintain full backward compatibility with USBC.
- Link to v2: https://lore.kernel.org/all/20250722-add-displayport-supp...

Changes in v2:
- Add new binding qcom,qcs615-qmp-dp-phy.yaml for QCS615 standalone DP
- Split DP PHY driver into patches 4-11 by logical chunks [Dmitry]
- Update DP PHY configuration flow to align with QMP Combo PHY implementation [Dmitry]
- Update all hex values to lowercase [Dmitry]
- Remove redundant comments in DP PHY driver [Krzysztof]
- Remove invalid USBC type define [Dmitry]
- Move lane_map， max_dp_lanes， max_dp_link_rate parsing logic to dp_link [Dmitry]
- Add TCSR-based mutex logic for DP and USB PHY coexistence [Dmitry]
- Drop patches 6–8 and remove related binding properties as rejected upstream
- Link to v1: https://lore.kernel.org/all/20241129-add-displayport-supp...

---
Xiangxu Yin (14):
      dt-bindings: phy: Add QMP USB3+DP PHY for QCS615
      phy: qcom: qmp-usbc: Rename USB-specific ops to prepare for DP support
      phy: qcom: qmp-usbc: Add DP-related fields for USB/DP switchable PHY
      phy: qcom: qmp-usbc: Add regulator init_load support
      phy: qcom: qmp-usbc: Move reset config into PHY cfg
      phy: qcom: qmp-usbc: add DP link and vco_div clocks for DP PHY
      phy: qcom: qmp-usbc: Move USB-only init to usb_power_on
      phy: qcom: qmp-usbc: Add TCSR parsing and PHY mode setting
      phy: qcom: qmp-usbc: Add DP PHY ops for USB/DP switchable Type-C PHYs
      phy: qcom: qmp-usbc: Add USB/DP exclude handling
      phy: qcom: qmp: Add DP v2 PHY register definitions
      phy: qcom: qmp-usbc: Add QCS615 USB/DP PHY config and DP mode support
      drm/msm/dp: move link-specific parsing from dp_panel to dp_link
      drm/msm/dp: Add support for lane mapping configuration

 .../bindings/phy/qcom,qcs615-qmp-usb3dp-phy.yaml   |  111 ++
 drivers/gpu/drm/msm/dp/dp_ctrl.c                   |   10 +-
 drivers/gpu/drm/msm/dp/dp_link.c                   |  118 +++
 drivers/gpu/drm/msm/dp/dp_link.h                   |    5 +
 drivers/gpu/drm/msm/dp/dp_panel.c                  |   78 +-
 drivers/gpu/drm/msm/dp/dp_panel.h                  |    3 -
 drivers/phy/qualcomm/phy-qcom-qmp-dp-phy-v2.h      |   21 +
 drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v2.h |  106 ++
 .../phy/qualcomm/phy-qcom-qmp-qserdes-txrx-v2.h    |   68 ++
 drivers/phy/qualcomm/phy-qcom-qmp-usbc.c           | 1066 ++++++++++++++++++--
 drivers/phy/qualcomm/phy-qcom-qmp.h                |    3 +
 11 files changed, 1421 insertions(+), 168 deletions(-)
---
base-commit: b5a4da2c459f79a2c87c867398f1c0c315779781
change-id: 20250919-add-displayport-support-for-qcs615-platform-f885597b3573

Best regards,
-- 
Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>