[PATCH v4 drm-dp 0/4] Add dp module in hibmc driver

[Yongbang Shi]

From: baihan li <libaihan at huawei.com>

Realizing the basic display function of DP cable for DP connector
displaying. Add DP module in hibmc drm driver, which is for Hisilicon
Hibmc SoC which used for Out-of-band management. Blow is the general
hardware connection, both the Hibmc and the host CPU are on the same
mother board.

+----------+       +----------+      +----- ----+      +----------------+
|          | PCIe  |  Hibmc   |      |          |      |                |
|host CPU( |<----->| display  |<---->| dp kapi  |<---->| dp aux moduel  |
|arm64,x86)|       |subsystem |      |  moduel  |<---->| dp link moduel |
+----------+       +----------+      +----------+      +----------------+

---
ChangeLog:
v3 -> v4:
  - retun error codes in  result incorrect branch, suggested by Dmitry Baryshkov.
  - replacing all ret= with returns, suggested by Dmitry Baryshkov.
  - moving the comment below the judgment statement, suggested by Dmitry Baryshkov.
  - moving definations to the source file and clearing headers, suggested by Dmitry Baryshkov.
  - reanaming dp_prefix to hibmc_dp_prefix, suggested by Dmitry Baryshkov.
  - changing hibmc_dp_reg_write_field to static inline and lock, suggested by Dmitry Baryshkov.
  - moving some structs to later patch, suggested by Dmitry Baryshkov.
  - optimizing hibmc_dp_link_get_adjust_train() to delete for loop, suggested by Dmitry Baryshkov.
  - changing ELNRNG to EIO error code, suggested by Dmitry Baryshkov.
  - deleting meaningless macro, suggested by Dmitry Baryshkov.
  - fixing build errors reported by kernel test robot <lkp at intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202411041559.WIfxRN6n-lkp@intel.com/
  - changed the type of train_set to array, suggested by Dmitry Baryshkov.
  - using actual link rate instead of magic num, suggested by Dmitry Baryshkov.
  - deleting hibmc_dp_hw_uninit(), suggested by Dmitry Baryshkov.
  - separating hibmc_vdac and hibmc_dp changes into separate patche, suggested by Dmitry Baryshkov.
  - static int hibmc_dp_prepare(), suggested by Dmitry Baryshkov.
  v3:https://lore.kernel.org/all/20241101105028.2177274-1-shiyongbang@huawei.com/
v2 -> v3:
  - put the macro definations in latter patch where they are actually used, suggested by Dmitry Baryshkov.
  - rename some macro definations to make them sensible, suggested by Dmitry Baryshkov.
  - using FIELD_PREP and FIELD_GET, suggested by Dmitry Baryshkov.
  - using DP_DPCD_REV_foo, suggested by Dmitry Baryshkov.
  - using switchcase in dp_link_reduce_lane, suggested by Dmitry Baryshkov.
  - deleting dp_link_pattern2dpcd function and using macros directly, suggested by Dmitry Baryshkov.
  - deleting EFAULT error codes, suggested by Dmitry Baryshkov.
  - fix build errors reported by kernel test robot <lkp at intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202410250305.UHKDhtxy-lkp@intel.com/
    Closes: https://lore.kernel.org/oe-kbuild-all/202410250931.UDQ9s66H-lkp@intel.com/
    Closes: https://lore.kernel.org/oe-kbuild-all/202410251136.1m7BlR68-lkp@intel.com/
  v2:https://lore.kernel.org/all/20241022124148.1952761-1-shiyongbang@huawei.com/
v1 -> v2:
  - using drm_dp_aux frame implement dp aux read and write functions, suggested by Jani Nikula.
  - using drm dp header files' dp macros instead, suggested by Andy Yan.
  - using drm_dp_* functions implement dp link training process, suggested by Jani Nikula.
  - changed some defines and functions to former patch, suggested by Dmitry Baryshkov.
  - sorting the headers including in dp_hw.h and hibmc_drm_drv.c files, suggested by Dmitry Baryshkov.
  - deleting struct dp_mode and dp_mode_cfg function, suggested by Dmitry Baryshkov.
  - modifying drm_simple_encoder_init function, suggested by Dmitry Baryshkov.
  - refactoring struct hibmc_connector, suggested by Dmitry Baryshkov.
  - withdrawing the modification in hibmc_kms_init, suggested by Dmitry Baryshkov.
  - fix build errors reported by kernel test robot <lkp at intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202410031735.8iRZZR6T-lkp@intel.com/
    Closes: https://lore.kernel.org/oe-kbuild-all/202410040328.VeVxM9yB-lkp@intel.com/
  v1:https://lore.kernel.org/all/20240930100610.782363-1-shiyongbang@huawei.com/
---

baihan li (5):
  drm/hisilicon/hibmc: add dp aux in hibmc drivers
  drm/hisilicon/hibmc: add dp link moduel in hibmc drivers
  drm/hisilicon/hibmc: add dp hw moduel in hibmc driver
  drm/hisilicon/hibmc: refactored struct hibmc_drm_private
  drm/hisilicon/hibmc: add dp module in hibmc

 drivers/gpu/drm/hisilicon/hibmc/Makefile      |   3 +-
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c   | 164 +++++++++
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h  |  63 ++++
 .../gpu/drm/hisilicon/hibmc/dp/dp_config.h    |  19 +
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c    | 217 +++++++++++
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h    |  28 ++
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c  | 339 ++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h   |  76 ++++
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c    | 118 ++++++
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c   |  12 +
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h   |  19 +-
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c   |  41 ++-
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c  |  20 +-
 13 files changed, 1080 insertions(+), 39 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c

-- 
2.33.0