Hi, this patch set adds the support of the Lontium lt8912 MIPI to HDMI bridge in the kernel.
It's only support the video part, not the audio part yet since I don't have the datasheet of this component. I get the current i2c configuration from Digi and Boundary drivers. Developed using the DB_DSIHD board from BoundaryDevices.
Update in v2 - Use standard data-lanes instead of a custom prop; - Use hdmi-connector node.
Update in v3 - Fix indentation; - Implement missing bridge functions; - Add some comments.
Update in v4 - Fix bridge ops; - Fix i2c error detection.
Update in v5 - Fix lt8912 name (lt8912b instead of lt8912); - Implement HPD via a workaround. In fact I don't have the datasheet of this component yet so I can't say if the configuration of the registers is correct or if I have an HW issue on my board. So, I choose to implement a fake version of HPD using a workqueue and polling the status regularly.
Update in v6 - Fix a warning found by "kernel test robot"
Update in v7 - Fix HPD logic (via an HW emulation); - HPD from chip is still not working.
Update in v8 - Remove HPD logic (will be added later when HW bug qill be fixed).
Update in v9 - Fix errors found in scripts/checkpatch.pl --strict
Thanks,
Adrien Grassein (2): dt-bindings: display: bridge: Add documentation for LT8912B drm/bridge: Introduce LT8912B DSI to HDMI bridge
.../display/bridge/lontium,lt8912b.yaml | 102 +++ MAINTAINERS | 6 + drivers/gpu/drm/bridge/Kconfig | 14 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lontium-lt8912b.c | 765 ++++++++++++++++++ 5 files changed, 888 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml create mode 100644 drivers/gpu/drm/bridge/lontium-lt8912b.c