From: Xuezhi Zhang zhangxuezhi1@yulong.com

This adds a new module for the ST7789V controller with parameters for the Waveshare 2inch LCD module.

Signed-off-by: Xuezhi Zhang zhangxuezhi1@yulong.com --- v2:change compatible value. v3:change author name. --- MAINTAINERS | 8 + drivers/gpu/drm/tiny/Kconfig | 14 ++ drivers/gpu/drm/tiny/Makefile | 1 + drivers/gpu/drm/tiny/st7789v.c | 269 +++++++++++++++++++++++++++++++++ 4 files changed, 292 insertions(+) create mode 100644 drivers/gpu/drm/tiny/st7789v.c

diff --git a/MAINTAINERS b/MAINTAINERS index d92f85ca831d..df25e8e0deb1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5769,6 +5769,14 @@ T: git git://anongit.freedesktop.org/drm/drm-misc F: Documentation/devicetree/bindings/display/sitronix,st7735r.yaml F: drivers/gpu/drm/tiny/st7735r.c

+DRM DRIVER FOR SITRONIX ST7789V PANELS +M: David Lechner david@lechnology.com +M: Xuezhi Zhang zhangxuezhi1@yulong.com +S: Maintained +T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/devicetree/bindings/display/sitronix,st7789v-dbi.yaml +F: drivers/gpu/drm/tiny/st7789v.c + DRM DRIVER FOR SONY ACX424AKP PANELS M: Linus Walleij linus.walleij@linaro.org S: Maintained diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig index 2b6414f0fa75..ac2c7fb702f0 100644 --- a/drivers/gpu/drm/tiny/Kconfig +++ b/drivers/gpu/drm/tiny/Kconfig @@ -131,3 +131,17 @@ config TINYDRM_ST7735R * Okaya RH128128T 1.44" 128x128 TFT

If M is selected the module will be called st7735r. + +config TINYDRM_ST7789V + tristate "DRM support for Sitronix ST7789V display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_KMS_CMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for Sitronix ST7789V with one of the following + LCDs: + * Waveshare 2inch lcd module 240x320 TFT + + If M is selected the module will be called st7789v. diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile index 6ae4e9e5a35f..aa0caa2b6c16 100644 --- a/drivers/gpu/drm/tiny/Makefile +++ b/drivers/gpu/drm/tiny/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o obj-$(CONFIG_TINYDRM_ST7586) += st7586.o obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o +obj-$(CONFIG_TINYDRM_ST7789V) += st7789v.o diff --git a/drivers/gpu/drm/tiny/st7789v.c b/drivers/gpu/drm/tiny/st7789v.c new file mode 100644 index 000000000000..9b4bb9edba40 --- /dev/null +++ b/drivers/gpu/drm/tiny/st7789v.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for display panels connected to a Sitronix ST7789V + * display controller in SPI mode. + * + * Copyright 2017 David Lechner david@lechnology.com + * Copyright (C) 2019 Glider bvba + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/dma-buf.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> + +#define ST7789V_PORCTRL 0xb2 +#define ST7789V_GCTRL 0xb7 +#define ST7789V_VCOMS 0xbb +#define ST7789V_LCMCTRL 0xc0 +#define ST7789V_VDVVRHEN 0xc2 +#define ST7789V_VRHS 0xc3 +#define ST7789V_VDVS 0xc4 +#define ST7789V_FRCTRL2 0xc6 +#define ST7789V_PWCTRL1 0xd0 +#define ST7789V_PVGAMCTRL 0xe0 +#define ST7789V_NVGAMCTRL 0xe1 + +#define ST7789V_MY BIT(7) +#define ST7789V_MX BIT(6) +#define ST7789V_MV BIT(5) +#define ST7789V_RGB BIT(3) + +struct st7789v_cfg { + const struct drm_display_mode mode; + unsigned int left_offset; + unsigned int top_offset; + unsigned int write_only:1; + unsigned int rgb:1; /* RGB (vs. BGR) */ +}; + +struct st7789v_priv { + struct mipi_dbi_dev dbidev; /* Must be first for .release() */ + const struct st7789v_cfg *cfg; +}; + +static void st7789v_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct st7789v_priv *priv = container_of(dbidev, struct st7789v_priv, + dbidev); + struct mipi_dbi *dbi = &dbidev->dbi; + int ret, idx; + u8 addr_mode; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_reset(dbidev); + if (ret) + goto out_exit; + + msleep(150); + + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + + switch (dbidev->rotation) { + default: + addr_mode = 0; + break; + case 90: + addr_mode = ST7789V_MY | ST7789V_MV; + break; + case 180: + addr_mode = ST7789V_MX | ST7789V_MY; + break; + case 270: + addr_mode = ST7789V_MX | ST7789V_MV; + break; + } + + if (priv->cfg->rgb) + addr_mode |= ST7789V_RGB; + + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, + MIPI_DCS_PIXEL_FMT_16BIT); + mipi_dbi_command(dbi, MIPI_DCS_ENTER_INVERT_MODE); + mipi_dbi_command(dbi, ST7789V_PORCTRL, 0x0c, 0x0c, 0x00, 0x33, 0x33); + mipi_dbi_command(dbi, ST7789V_GCTRL, 0x35); + mipi_dbi_command(dbi, ST7789V_VCOMS, 0x1f); + mipi_dbi_command(dbi, ST7789V_LCMCTRL, 0x2c); + mipi_dbi_command(dbi, ST7789V_VDVVRHEN, 0x01); + mipi_dbi_command(dbi, ST7789V_VRHS, 0x12); + mipi_dbi_command(dbi, ST7789V_VDVS, 0x20); + mipi_dbi_command(dbi, ST7789V_FRCTRL2, 0x0f); + mipi_dbi_command(dbi, ST7789V_PWCTRL1, 0xa4, 0xa1); + mipi_dbi_command(dbi, ST7789V_PVGAMCTRL, 0xd0, 0x08, 0x11, 0x08, 0x0c, + 0x15, 0x39, 0x33, 0x50, 0x36, 0x13, 0x14, 0x29, 0x2d); + mipi_dbi_command(dbi, ST7789V_NVGAMCTRL, 0xd0, 0x08, 0x10, 0x08, 0x06, + 0x06, 0x39, 0x44, 0x51, 0x0b, 0x16, 0x14, 0x2f, 0x31); + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); + +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs st7789v_pipe_funcs = { + .enable = st7789v_pipe_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, + .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb, +}; + +static const struct st7789v_cfg ws_2inch_lcd_cfg = { + .mode = { DRM_SIMPLE_MODE(240, 320, 34, 43) }, + /* Cannot read from Waveshare 2inch lcd module" display via SPI */ + .write_only = true, + .rgb = false, +}; + + +DEFINE_DRM_GEM_CMA_FOPS(st7789v_fops); + +static const struct drm_driver st7789v_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &st7789v_fops, + DRM_GEM_CMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "st7789v", + .desc = "Sitronix ST7789R", + .date = "20210310", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id st7789v_of_match[] = { + { .compatible = "waveshare,ws2inch", .data = &ws_2inch_lcd_cfg }, + { }, +}; +MODULE_DEVICE_TABLE(of, st7789v_of_match); + +static const struct spi_device_id st7789v_id[] = { + { "ws2inch", (uintptr_t)&ws_2inch_lcd_cfg }, + { }, +}; +MODULE_DEVICE_TABLE(spi, st7789v_id); + +static int st7789v_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + const struct st7789v_cfg *cfg; + struct mipi_dbi_dev *dbidev; + struct st7789v_priv *priv; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + cfg = device_get_match_data(&spi->dev); + if (!cfg) + cfg = (void *)spi_get_device_id(spi)->driver_data; + + priv = devm_drm_dev_alloc(dev, &st7789v_driver, + struct st7789v_priv, dbidev.drm); + if (IS_ERR(priv)) + return PTR_ERR(priv); + + dbidev = &priv->dbidev; + priv->cfg = cfg; + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); + return PTR_ERR(dbi->reset); + } + + dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); + return PTR_ERR(dc); + } + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + if (cfg->write_only) + dbi->read_commands = NULL; + + dbidev->left_offset = cfg->left_offset; + dbidev->top_offset = cfg->top_offset; + + ret = mipi_dbi_dev_init(dbidev, &st7789v_pipe_funcs, &cfg->mode, + rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static int st7789v_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); + + return 0; +} + +static void st7789v_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver st7789v_spi_driver = { + .driver = { + .name = "st7789v-dbi", + .of_match_table = st7789v_of_match, + }, + .id_table = st7789v_id, + .probe = st7789v_probe, + .remove = st7789v_remove, + .shutdown = st7789v_shutdown, +}; +module_spi_driver(st7789v_spi_driver); + +MODULE_DESCRIPTION("Sitronix ST7789V DRM driver"); +MODULE_AUTHOR("Carlis zhangxuezhi1@yulong.com"); +MODULE_LICENSE("GPL");