We are currently restricted when it comes to supporting DSI on devices that have a non-DSI control bus. For example, DSI encoder chips are available in the market that are configured via i2c. Configuring their registers via DSI bus is either optional or not available at all.
These devices still need to pass DSI parameters (data lanes, mode flags etc) to the DSI host they are connected to. We don't have a way to do that at the moment.
After some discussions on the previous RFC[1], we decided to support this by providing additional API in drm_mipi_dsi which lets us create new DSI devices without the need of them to have a DT node.
[1]: https://lkml.org/lkml/2015/6/30/42
Changes from v2 to v3:
- Incorporated misc comments by Andrzej. Changed from RFC to a PATCH set. - Fixed htmldocs warnings.
Archit Taneja (5): drm/dsi: Refactor device creation drm/dsi: Try to match non-DT dsi devices drm/dsi: Check for used channels drm/dsi: Add routine to unregister dsi device drm/dsi: Get DSI host by DT device node
drivers/gpu/drm/drm_mipi_dsi.c | 136 +++++++++++++++++++++++++++++++---------- include/drm/drm_mipi_dsi.h | 29 +++++++++ 2 files changed, 133 insertions(+), 32 deletions(-)