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2021-06-11drm/panel: db7430: Add driver for Samsung DB7430Linus Walleij
This adds a new driver for the Samsung DB7430 DPI display controller as controlled over SPI. Right now the only panel product we know that is using this display controller is the LMS397KF04 but there may be more. This is the first regular panel driver making use of the MIPI DBI helper library. The DBI "device" portions can not be used because that code assumes the use of a single regulator and specific timings around the reset pulse that do not match the DB7430 datasheet. Cc: Paul Cercueil <paul@crapouillou.net> Cc: Doug Anderson <dianders@chromium.org> Acked-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210610220527.366432-1-linus.walleij@linaro.org