[PATCH v8 0/2] Subject: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

This series introduces:
  - A device tree binding YAML file describing the hardware
  - A new DRM bridge driver implementing the basic functionality

  LT9611C(EX/UXD) is an I2C-controlled chip that Receiver signal/dual port
  mipi dsi and output hdmi, differences in hardware features:
  - LT9611C: supports 1-port mipi dsi to hdmi 1.4
  - LT9611EX: supports 2-port mipi dsi to hdmi 1.4
  - LT9611UXD: supports 2-port mipi dsi to hdmi 1.4/2.0

  Changes in v8:
  - Refactor lt9611c_read_write_flow() to take a struct lt9611c_cmd parameter with an embedded struct lt9611c_cmd_hdr (func,
  type, seq, sep) and optional data payload, eliminating raw byte arrays at call sites
  - Add LT9611C_CMD_HDR_SIZE, LT9611C_EDID_BUF_SIZE constants to replace magic numbers
  - Use container_of_const() in bridge_to_lt9611c_const()
  - Remove obvious /*read only*/ comment
  - Use unsigned long cast instead of uintptr_t for chip type initialization
  - Replace memset + memcpy with memcpy + memset for CRC buffer preparation
  - Add ABI documentation for lt9611c_firmware sysfs attribute
  - Fix Kconfig help text to proper prose within line limits
  - Add disable_irq() before cancel_work_sync() in lt9611c_remove()
  - Add cancel_work_sync() in lt9611c_bridge_suspend()
  - Inline lt9611c_gpio_init() into probe
  - Use of_drm_get_bridge_by_endpoint() instead of drm_of_find_panel_or_bridge() + drm_bridge_get()
  - Return error if LT9611C (single DSI only) is configured with dual DSI in device tree
  - Move HPD status read_write_flow call from IRQ handler to lt9611c_hpd_work workqueue
  - Removed second lt9611_reset call from probe as not needed
  - Add struct lt9611c_rsp symmetric to struct lt9611c_cmd — both embed struct lt9611c_cmd_hdr
  - Link to v7: https://lore.kernel.org/lkml/20260716-lt9611c-v7-v7-0-7553a14735fc@oss.qualcomm.com/ (local)

  Changes in v7:
  - Use i2c_get_match_data() for chip type initialization
  - Implement hdmi_write_hdmi_infoframe/hdmi_clear_hdmi_infoframe
  - Use drm_atomic_commit in bridge callbacks
  - Removing redundant lt9611c_reset() call and cleanup in probe error
    path
  - Populate bridge.vendor and bridge.product
  - implement hpd_enable callback
  - fix DT parsing and bridge refcount
  - Removed pre_enable and post_disable callbacks, it was affecting hpd
    as regulator was disabled
  - Changed reset gpio enablement and lt9611c_reset api.
  - Link to v6: https://lore.kernel.org/all/20260508134009.4582-1-syyang@lontium.com/ (local)

  Changes in v6:
  - dt-binding:
   1. sorted the compatible list alphabetically.                     [Dmitry]
  - Link to v5: https://lore.kernel.org/lkml/20260507024214.97708-1-syyang@lontium.com/ (local)

  Changes in v5:
  - drm/bridge:
   1. use #define FW_FILE "Lontium/lt9611c_fw.bin" to match linux-firmware    [Dmitry]
   2. add atomic state management
  - Link to v4: https://lore.kernel.org/lkml/20260506095100.78998-1-syyang@lontium.com/ (local)

  Changes in v4:
  - dt-binding:
   1. fix commit message                                                    [Krzysztof]
  - drm/bridge:
   1. use lt9611c_fw.bin                                                     [Dmitry]
   3. use enum lt9611_chip_type
   4. remove *fw from the lt9611c struct
   5. use read_poll_timeout and -ETIMEDOUT
   6. replace mutex_lock with guard(mutex) in some places
   7. switch to ARRAY_SIZE instead of specifying lengths directly
   8. use dev_err_probe
   9. add clear functions for AVI and audio infoframes
   10. add DRM_BRIDGE_OP_HDMI and remove .hpd_notify
   11. replace "GPL v2" with "GPL"
  - Link to v3: https://lore.kernel.org/lkml/20260420061644.1251070-1-syyang@lontium.com/ (local)

  Changes in v3:
  - dt-binding:
   1. lt9611c(ex/uxd) content merged into lontium,lt9611.yaml
  - drm/bridge:
   1. Drop the licence text, only use SPDX header
   2. Sort the headers
   3. Use library functions for crc8
   4. Use paged writes as implemented for LT9611C(EX/UXD)
   5. Use HDMI audio helpers
   6. Replace devm_kzalloc with devm_drm_bridge_alloc
   7. Remove extra kthread
  - Link to v1: https://lore.kernel.org/lkml/20250903123825.1721443-1-syyang@lontium.com/ (local)

  Changes in v2:
   1. Forget modify code, operation error, Please disregard this submit.

  Changes in v1:
  - dt-binding:
   1. Submit the first version of the code.
  - drm/bridge:
   1. Submit the first version of the code.

Signed-off-by: Mohit Dsor <redacted>
---
Sunyun Yang (2):
      dt-bindings: bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver
      drm/bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

 .../ABI/testing/sysfs-driver-lontium-lt9611c       |   11 +
 .../bindings/display/bridge/lontium,lt9611.yaml    |    8 +-
 drivers/gpu/drm/bridge/Kconfig                     |   17 +
 drivers/gpu/drm/bridge/Makefile                    |    1 +
 drivers/gpu/drm/bridge/lontium-lt9611c.c           | 1344 ++++++++++++++++++++
 5 files changed, 1379 insertions(+), 2 deletions(-)
---
base-commit: 34e27b90552acf21bd73aac395667c8aae6da480
change-id: 20260708-lt9611c-v7-ff76b2d1bf5f

Best regards,
--  
Mohit Dsor [off-list ref]