[PATCH v5 1/2] dt-bindings: bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

[PATCH v5 1/2] dt-bindings: bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

[syyang]

From: Sunyun Yang <syyang@lontium.com>

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

Signed-off-by: Sunyun Yang <syyang@lontium.com>
---
 .../bindings/display/bridge/lontium,lt9611.yaml           | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
index 429a06057ae8..b20a43456b01 100644
--- a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
@@ -4,19 +4,23 @@
 $id: http://devicetree.org/schemas/display/bridge/lontium,lt9611.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Lontium LT9611(UXC) 2 Port MIPI to HDMI Bridge
+title: Lontium LT9611(UXC/C/EX/UXD) 2 Port MIPI DSI to HDMI Bridge
 
 maintainers:
   - Vinod Koul <vkoul@kernel.org>
 
 description: |
-  The LT9611 and LT9611UXC are bridge devices which convert DSI to HDMI
+  The LT9611、LT9611UXC、LT9611C、LT9611EX and LT9611UXD
+  are bridge devices which convert DSI to HDMI
 
 properties:
   compatible:
     enum:
       - lontium,lt9611
       - lontium,lt9611uxc
+      - lontium,lt9611c
+      - lontium,lt9611ex
+      - lontium,lt9611uxd
 
   reg:
     maxItems: 1
-- 
2.34.1

[PATCH v5 0/2] Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

[syyang]

From: Sunyun Yang <syyang@lontium.com>

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

Signed-off-by: Sunyun Yang<syyang@lontium.com>
---
Changes in v5:
- dt-binding:
- 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/

Changes in v4:
- dt-binding:
 1. fix commit message                                                    [Krzysztof]
- drm/bridge:
 1. use lt9611c_fw.bin                                                     [Dmitry]
 2. use drm_bridge::next_bridge
 3. use enum lt9611_chip_type
 4. remove *fw from the lt9611c struct
 5. "bool hdmi_connected;" variable add comment
 6. use read_poll_timeout and -ETIMEDOUT in the "lt9611c_read_write_flow" function
 7. replace mutex_lock(&lt9611c->ocm_lock) with guard(mutex)(&lt9611c->ocm_lock) in some place
 8. switch to ARRAY_SIZE instead of specifying lengths directly
 9. use dev_err_probe
 10. add clear functions for AVI and audio infoframes
 11. add DRM_BRIDGE_OP_HDMI  and remove .hpd_notify
 12. remove the sample_rate validation code
 13. fix MODULE_DESCRIPTION
 14. replace "GPL v2" with "GPL"
- Link to v3: https://lore.kernel.org/lkml/20260420061644.1251070-1-syyang@lontium.com/

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. Drop i2c_read_byte and i2c_write_byte
 5. Lowercase all hex values
 6. Use paged writes as implemented for LT9611C(EX/UXD)
 7. Drop dev_info, use dev_dbg
 8. Modify lt9611c_get_edid_block, don't store EDID in the long-term structures
 9. Use HDMI audio helpers.
 10. Remove unnecessary flags,Implement proper cleanup path, unwinding resources one by one.
 11. Replace devm_kzalloc with devm_drm_bridge_alloc.
 12. Remove extra kthread.
- Link to v1: https://lore.kernel.org/lkml/20250903123825.1721443-1-syyang@lontium.com/

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.

---
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

 .../display/bridge/lontium,lt9611.yaml        |    8 +-
 drivers/gpu/drm/bridge/Kconfig                |   18 +
 drivers/gpu/drm/bridge/Makefile               |    1 +
 drivers/gpu/drm/bridge/lontium-lt9611c.c      | 1240 +++++++++++++++++
 4 files changed, 1265 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/lontium-lt9611c.c

-- 
2.34.1

Re: [PATCH v5 1/2] dt-bindings: bridge: Add Lontium LT9611C(EX/UXD) MIPI DSI to HDMI driver

[Dmitry Baryshkov]

On Thu, May 07, 2026 at 10:42:13AM +0800, syyang@lontium.com wrote:
> From: Sunyun Yang <syyang@lontium.com>
> 
> 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
> 
> Signed-off-by: Sunyun Yang <syyang@lontium.com>
> ---
>  .../bindings/display/bridge/lontium,lt9611.yaml           | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> index 429a06057ae8..b20a43456b01 100644
> --- a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> @@ -4,19 +4,23 @@
>  $id: http://devicetree.org/schemas/display/bridge/lontium,lt9611.yaml#
>  $schema: http://devicetree.org/meta-schemas/core.yaml#
>  
> -title: Lontium LT9611(UXC) 2 Port MIPI to HDMI Bridge
> +title: Lontium LT9611(UXC/C/EX/UXD) 2 Port MIPI DSI to HDMI Bridge
>  
>  maintainers:
>    - Vinod Koul <vkoul@kernel.org>
>  
>  description: |
> -  The LT9611 and LT9611UXC are bridge devices which convert DSI to HDMI
> +  The LT9611、LT9611UXC、LT9611C、LT9611EX and LT9611UXD
> +  are bridge devices which convert DSI to HDMI
>  
>  properties:
>    compatible:
>      enum:
>        - lontium,lt9611
>        - lontium,lt9611uxc
> +      - lontium,lt9611c
> +      - lontium,lt9611ex
> +      - lontium,lt9611uxd

Please keep the list sorted

>  
>    reg:
>      maxItems: 1
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry