Hi,
This patchset adds a driver that will work with most MIPI DBI compatible SPI panels out there.
Maxime gave[1] a good overview of the situation with these displays and proposed to make a driver that works with all MIPI DBI compatible controllers and use a firmware file to provide the controller setup for a particular panel.
I have now made a script[2] that can create the firmware file, example in the wiki[3]
Main change since version 2: - Use Device Tree for all properties (Maxime)
The MIPI DPI specification has optional support for DPI where the controller is configured over DBI. Because of this I put the driver in drm/panel so it could be extended in the future to support panel-mipi-dpi-spi. I have now looked at this more closely and the only thing that can be shared between the two are the firmware command functions. These functions can be moved to the drm_mipi_dbi_helper for sharing. Now that I know that there won't be one driver module that supports both use cases, I'm thinking of moving the driver to drm/tiny where the other drivers of its kind are located. I'll move the driver in the next version of the patchset unless someone have reasons for leaving it in drm/panel.
Noralf.
[1] https://lore.kernel.org/dri-devel/20211129093946.xhp22mvdut3m67sc@houat/ [2] https://github.com/notro/panel-mipi-dbi/blob/main/mipi-dbi-cmd [3] https://github.com/notro/panel-mipi-dbi/wiki
Noralf Trønnes (3): dt-bindings: display: add bindings for MIPI DBI compatible SPI panels drm/mipi-dbi: Add driver_private member to struct mipi_dbi_dev drm/panel: Add MIPI DBI compatible SPI driver
.../display/panel/panel-mipi-dbi-spi.yaml | 124 ++++++ MAINTAINERS | 8 + drivers/gpu/drm/panel/Kconfig | 13 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-mipi-dbi.c | 413 ++++++++++++++++++ include/drm/drm_mipi_dbi.h | 8 + 6 files changed, 567 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml create mode 100644 drivers/gpu/drm/panel/panel-mipi-dbi.c