From e73c6348ebeeb60bc92b316904c7ae5ca7b68fe1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= Date: Sun, 27 Feb 2022 13:47:13 +0100 Subject: [PATCH] drm/tiny: Add MIPI DBI compatible SPI driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 0e65e2e upstream. Add a driver that will work with most MIPI DBI compatible SPI panels. This avoids adding a driver for every new MIPI DBI compatible controller that is to be used by Linux. The 'compatible' Device Tree property with a '.bin' suffix will be used to load a firmware file that contains the controller configuration. Example (driver will load sainsmart18.bin): display@0 { compatible = "sainsmart18", "panel-mipi-dbi-spi"; ... }; v5: - 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. v4: - Move driver to drm/tiny where the other drivers of its kind are located. The driver module will not be shared with a future DPI driver after all. v3: - Move properties to DT (Maxime) - The MIPI DPI spec has optional support for DPI where the controller is configured over DBI. Rework the command functions so they can be moved to drm_mipi_dbi and shared with a future panel-mipi-dpi-spi driver v2: - Drop model property and use compatible instead (Rob) - Add wiki entry in MAINTAINERS Acked-by: Maxime Ripard Reviewed-by: Sam Ravnborg Signed-off-by: Noralf Trønnes Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-6-noralf@tronnes.org --- MAINTAINERS | 8 + drivers/gpu/drm/tiny/Kconfig | 15 + drivers/gpu/drm/tiny/Makefile | 1 + drivers/gpu/drm/tiny/panel-mipi-dbi.c | 398 ++++++++++++++++++++++++++ 4 files changed, 422 insertions(+) create mode 100644 drivers/gpu/drm/tiny/panel-mipi-dbi.c --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5980,6 +5980,14 @@ T: git git://anongit.freedesktop.org/drm F: Documentation/devicetree/bindings/display/multi-inno,mi0283qt.txt F: drivers/gpu/drm/tiny/mi0283qt.c +DRM DRIVER FOR MIPI DBI compatible panels +M: Noralf Trønnes +S: Maintained +W: https://github.com/notro/panel-mipi-dbi/wiki +T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml +F: drivers/gpu/drm/tiny/panel-mipi-dbi.c + DRM DRIVER FOR MSM ADRENO GPU M: Rob Clark M: Sean Paul --- a/drivers/gpu/drm/tiny/Kconfig +++ b/drivers/gpu/drm/tiny/Kconfig @@ -51,6 +51,21 @@ config DRM_GM12U320 This is a KMS driver for projectors which use the GM12U320 chipset for video transfer over USB2/3, such as the Acer C120 mini projector. +config DRM_PANEL_MIPI_DBI + tristate "DRM support for MIPI DBI compatible panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_CMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + select VIDEOMODE_HELPERS + help + Say Y here if you want to enable support for MIPI DBI compatible + panels. The controller command setup can be provided using a + firmware file. For more information see + https://github.com/notro/panel-mipi-dbi/wiki. + To compile this driver as a module, choose M here. + config DRM_SIMPLEDRM tristate "Simple framebuffer driver" depends on DRM --- a/drivers/gpu/drm/tiny/Makefile +++ b/drivers/gpu/drm/tiny/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o obj-$(CONFIG_DRM_BOCHS) += bochs.o obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus.o obj-$(CONFIG_DRM_GM12U320) += gm12u320.o +obj-$(CONFIG_DRM_PANEL_MIPI_DBI) += panel-mipi-dbi.o obj-$(CONFIG_DRM_SIMPLEDRM) += simpledrm.o obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o --- /dev/null +++ b/drivers/gpu/drm/tiny/panel-mipi-dbi.c @@ -0,0 +1,398 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DRM driver for MIPI DBI compatible display panels + * + * Copyright 2022 Noralf Trønnes + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include