Hi, This patchset adds a driver that will work with most MIPI DBI compatible SPI panels out there. It can replace the SPI interface support in these drivers: $ grep -lr MIPI_DCS drivers/staging/fbtft/ | grep -v "-" | uniq | sort drivers/staging/fbtft/fb_hx8340bn.c drivers/staging/fbtft/fb_hx8353d.c drivers/staging/fbtft/fb_hx8357d.c drivers/staging/fbtft/fb_ili9163.c drivers/staging/fbtft/fb_ili9340.c drivers/staging/fbtft/fb_ili9341.c drivers/staging/fbtft/fb_ili9481.c drivers/staging/fbtft/fb_ili9486.c drivers/staging/fbtft/fb_s6d02a1.c drivers/staging/fbtft/fb_st7735r.c drivers/staging/fbtft/fb_st7789v.c drivers/staging/fbtft/fb_tinylcd.c Note that the MIPI DBI parallel interface supported by fbtft does not yet exist in DRM. 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. Changes since version 4: - Add sainsmart18 to compatible items (Rob) - Expand write-only description (Sam) - kconfig: s/DRM_KMS_CMA_HELPER/DRM_GEM_CMA_HELPER/ (Sam) - kconfig: Add select VIDEOMODE_HELPERS (Sam) - kconfig: Add wiki url in the description (Sam) - Split out and use of_get_drm_panel_display_mode()(Sam) - Only use the first compatible to look for a firmware file since the binding mandates 2 compatibles. - Make having a firmware file mandatory so we can print an error message if it's missing to improve the user experience. It's very unlikely that a controller doesn't need to be initialized and if it doesn't, it's possible to have a firmware file containing only a DCS NOP. See wiki[2] for a script to make command firmware files. Noralf. [1] https://lore.kernel.org/dri-devel/20211129093946.xhp22mvdut3m67sc@houat/ [2] https://github.com/notro/panel-mipi-dbi/wiki Noralf Trønnes (5): dt-bindings: display: add bindings for MIPI DBI compatible SPI panels drm/modes: Remove trailing whitespace drm/modes: Add of_get_drm_panel_display_mode() drm/mipi-dbi: Add driver_private member to struct mipi_dbi_dev drm/tiny: Add MIPI DBI compatible SPI driver .../display/panel/panel-mipi-dbi-spi.yaml | 127 ++++++ MAINTAINERS | 8 + drivers/gpu/drm/drm_modes.c | 51 ++- drivers/gpu/drm/tiny/Kconfig | 15 + drivers/gpu/drm/tiny/Makefile | 1 + drivers/gpu/drm/tiny/panel-mipi-dbi.c | 398 ++++++++++++++++++ include/drm/drm_mipi_dbi.h | 8 + include/drm/drm_modes.h | 8 + 8 files changed, 615 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml create mode 100644 drivers/gpu/drm/tiny/panel-mipi-dbi.c -- 2.33.0
