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ODROID-COMMON: drm/tiny: add support for Waveshare 2inch LCD module

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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>
Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I6b8e472ed86c06b2293d00410fa3c55b5de1ac0e
This commit is contained in:
Xuezhi Zhang
2021-03-30 08:08:46 +00:00
committed by Dongjin Kim
parent 275c8052ec
commit be416fdc5f
4 changed files with 291 additions and 0 deletions
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8
MAINTAINERS
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@@ -5678,6 +5678,14 @@ 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

14
drivers/gpu/drm/tiny/Kconfig
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@@ -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.

1
drivers/gpu/drm/tiny/Makefile
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@@ -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

268
drivers/gpu/drm/tiny/st7789v.c Normal file
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@@ -0,0 +1,268 @@
// 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 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");