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Commit 7142afb3 authored by Maxime Ripard's avatar Maxime Ripard Committed by Thierry Reding
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drm/panel: Add driver for sitronix ST7789V LCD controller 

The Sitronix ST7789v controller is used to drive 240x320 LCD panels through
various interfaces, including SPI and RGB/Parallel.

The current driver is configuring it for the latter. Support for tinyDRM
can always be added later.
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 63c32f7c
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Showing with 457 additions and 0 deletions
drivers/gpu/drm/panel/Kconfig
View file @ 7142afb3
...@@ -87,4 +87,11 @@ config DRM_PANEL_SHARP_LS043T1LE01 ...@@ -87,4 +87,11 @@ config DRM_PANEL_SHARP_LS043T1LE01
Say Y here if you want to enable support for Sharp LS043T1LE01 qHD Say Y here if you want to enable support for Sharp LS043T1LE01 qHD
(540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard (540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard
config DRM_PANEL_SITRONIX_ST7789V
tristate "Sitronix ST7789V panel"
depends on OF && SPI
help
Say Y here if you want to enable support for the Sitronix
ST7789V controller for 240x320 LCD panels
endmenu endmenu
drivers/gpu/drm/panel/Makefile
View file @ 7142afb3
...@@ -7,3 +7,4 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o ...@@ -7,3 +7,4 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
drivers/gpu/drm/panel/panel-sitronix-st7789v.c 0 → 100644
View file @ 7142afb3
/*
* Copyright (C) 2017 Free Electrons
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*/
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <drm/drmP.h>
#include <drm/drm_panel.h>
#include <video/mipi_display.h>
#define ST7789V_COLMOD_RGB_FMT_18BITS (6 << 4)
#define ST7789V_COLMOD_CTRL_FMT_18BITS (6 << 0)
#define ST7789V_RAMCTRL_CMD 0xb0
#define ST7789V_RAMCTRL_RM_RGB BIT(4)
#define ST7789V_RAMCTRL_DM_RGB BIT(0)
#define ST7789V_RAMCTRL_MAGIC (3 << 6)
#define ST7789V_RAMCTRL_EPF(n) (((n) & 3) << 4)
#define ST7789V_RGBCTRL_CMD 0xb1
#define ST7789V_RGBCTRL_WO BIT(7)
#define ST7789V_RGBCTRL_RCM(n) (((n) & 3) << 5)
#define ST7789V_RGBCTRL_VSYNC_HIGH BIT(3)
#define ST7789V_RGBCTRL_HSYNC_HIGH BIT(2)
#define ST7789V_RGBCTRL_PCLK_HIGH BIT(1)
#define ST7789V_RGBCTRL_VBP(n) ((n) & 0x7f)
#define ST7789V_RGBCTRL_HBP(n) ((n) & 0x1f)
#define ST7789V_PORCTRL_CMD 0xb2
#define ST7789V_PORCTRL_IDLE_BP(n) (((n) & 0xf) << 4)
#define ST7789V_PORCTRL_IDLE_FP(n) ((n) & 0xf)
#define ST7789V_PORCTRL_PARTIAL_BP(n) (((n) & 0xf) << 4)
#define ST7789V_PORCTRL_PARTIAL_FP(n) ((n) & 0xf)
#define ST7789V_GCTRL_CMD 0xb7
#define ST7789V_GCTRL_VGHS(n) (((n) & 7) << 4)
#define ST7789V_GCTRL_VGLS(n) ((n) & 7)
#define ST7789V_VCOMS_CMD 0xbb
#define ST7789V_LCMCTRL_CMD 0xc0
#define ST7789V_LCMCTRL_XBGR BIT(5)
#define ST7789V_LCMCTRL_XMX BIT(3)
#define ST7789V_LCMCTRL_XMH BIT(2)
#define ST7789V_VDVVRHEN_CMD 0xc2
#define ST7789V_VDVVRHEN_CMDEN BIT(0)
#define ST7789V_VRHS_CMD 0xc3
#define ST7789V_VDVS_CMD 0xc4
#define ST7789V_FRCTRL2_CMD 0xc6
#define ST7789V_PWCTRL1_CMD 0xd0
#define ST7789V_PWCTRL1_MAGIC 0xa4
#define ST7789V_PWCTRL1_AVDD(n) (((n) & 3) << 6)
#define ST7789V_PWCTRL1_AVCL(n) (((n) & 3) << 4)
#define ST7789V_PWCTRL1_VDS(n) ((n) & 3)
#define ST7789V_PVGAMCTRL_CMD 0xe0
#define ST7789V_PVGAMCTRL_JP0(n) (((n) & 3) << 4)
#define ST7789V_PVGAMCTRL_JP1(n) (((n) & 3) << 4)
#define ST7789V_PVGAMCTRL_VP0(n) ((n) & 0xf)
#define ST7789V_PVGAMCTRL_VP1(n) ((n) & 0x3f)
#define ST7789V_PVGAMCTRL_VP2(n) ((n) & 0x3f)
#define ST7789V_PVGAMCTRL_VP4(n) ((n) & 0x1f)
#define ST7789V_PVGAMCTRL_VP6(n) ((n) & 0x1f)
#define ST7789V_PVGAMCTRL_VP13(n) ((n) & 0xf)
#define ST7789V_PVGAMCTRL_VP20(n) ((n) & 0x7f)
#define ST7789V_PVGAMCTRL_VP27(n) ((n) & 7)
#define ST7789V_PVGAMCTRL_VP36(n) (((n) & 7) << 4)
#define ST7789V_PVGAMCTRL_VP43(n) ((n) & 0x7f)
#define ST7789V_PVGAMCTRL_VP50(n) ((n) & 0xf)
#define ST7789V_PVGAMCTRL_VP57(n) ((n) & 0x1f)
#define ST7789V_PVGAMCTRL_VP59(n) ((n) & 0x1f)
#define ST7789V_PVGAMCTRL_VP61(n) ((n) & 0x3f)
#define ST7789V_PVGAMCTRL_VP62(n) ((n) & 0x3f)
#define ST7789V_PVGAMCTRL_VP63(n) (((n) & 0xf) << 4)
#define ST7789V_NVGAMCTRL_CMD 0xe1
#define ST7789V_NVGAMCTRL_JN0(n) (((n) & 3) << 4)
#define ST7789V_NVGAMCTRL_JN1(n) (((n) & 3) << 4)
#define ST7789V_NVGAMCTRL_VN0(n) ((n) & 0xf)
#define ST7789V_NVGAMCTRL_VN1(n) ((n) & 0x3f)
#define ST7789V_NVGAMCTRL_VN2(n) ((n) & 0x3f)
#define ST7789V_NVGAMCTRL_VN4(n) ((n) & 0x1f)
#define ST7789V_NVGAMCTRL_VN6(n) ((n) & 0x1f)
#define ST7789V_NVGAMCTRL_VN13(n) ((n) & 0xf)
#define ST7789V_NVGAMCTRL_VN20(n) ((n) & 0x7f)
#define ST7789V_NVGAMCTRL_VN27(n) ((n) & 7)
#define ST7789V_NVGAMCTRL_VN36(n) (((n) & 7) << 4)
#define ST7789V_NVGAMCTRL_VN43(n) ((n) & 0x7f)
#define ST7789V_NVGAMCTRL_VN50(n) ((n) & 0xf)
#define ST7789V_NVGAMCTRL_VN57(n) ((n) & 0x1f)
#define ST7789V_NVGAMCTRL_VN59(n) ((n) & 0x1f)
#define ST7789V_NVGAMCTRL_VN61(n) ((n) & 0x3f)
#define ST7789V_NVGAMCTRL_VN62(n) ((n) & 0x3f)
#define ST7789V_NVGAMCTRL_VN63(n) (((n) & 0xf) << 4)
#define ST7789V_TEST(val, func) \
do { \
if ((val = (func))) \
return val; \
} while (0)
struct st7789v {
struct drm_panel panel;
struct spi_device *spi;
struct gpio_desc *reset;
struct backlight_device *backlight;
struct regulator *power;
};
enum st7789v_prefix {
ST7789V_COMMAND = 0,
ST7789V_DATA = 1,
};
static inline struct st7789v *panel_to_st7789v(struct drm_panel *panel)
{
return container_of(panel, struct st7789v, panel);
}
static int st7789v_spi_write(struct st7789v *ctx, enum st7789v_prefix prefix,
u8 data)
{
struct spi_transfer xfer = { };
struct spi_message msg;
u16 txbuf = ((prefix & 1) << 8) | data;
spi_message_init(&msg);
xfer.tx_buf = &txbuf;
xfer.bits_per_word = 9;
xfer.len = sizeof(txbuf);
spi_message_add_tail(&xfer, &msg);
return spi_sync(ctx->spi, &msg);
}
static int st7789v_write_command(struct st7789v *ctx, u8 cmd)
{
return st7789v_spi_write(ctx, ST7789V_COMMAND, cmd);
}
static int st7789v_write_data(struct st7789v *ctx, u8 cmd)
{
return st7789v_spi_write(ctx, ST7789V_DATA, cmd);
}
static const struct drm_display_mode default_mode = {
.clock = 7000,
.hdisplay = 240,
.hsync_start = 240 + 38,
.hsync_end = 240 + 38 + 10,
.htotal = 240 + 38 + 10 + 10,
.vdisplay = 320,
.vsync_start = 320 + 8,
.vsync_end = 320 + 8 + 4,
.vtotal = 320 + 8 + 4 + 4,
.vrefresh = 60,
};
static int st7789v_get_modes(struct drm_panel *panel)
{
struct drm_connector *connector = panel->connector;
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh);
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
panel->connector->display_info.width_mm = 61;
panel->connector->display_info.height_mm = 103;
return 1;
}
static int st7789v_prepare(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
int ret;
ret = regulator_enable(ctx->power);
if (ret)
return ret;
gpiod_set_value(ctx->reset, 1);
msleep(30);
gpiod_set_value(ctx->reset, 0);
msleep(120);
ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_EXIT_SLEEP_MODE));
/* We need to wait 120ms after a sleep out command */
msleep(120);
ST7789V_TEST(ret, st7789v_write_command(ctx,
MIPI_DCS_SET_ADDRESS_MODE));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0));
ST7789V_TEST(ret, st7789v_write_command(ctx,
MIPI_DCS_SET_PIXEL_FORMAT));
ST7789V_TEST(ret, st7789v_write_data(ctx,
(MIPI_DCS_PIXEL_FMT_18BIT << 4) |
(MIPI_DCS_PIXEL_FMT_18BIT)));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PORCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PORCTRL_IDLE_BP(3) |
ST7789V_PORCTRL_IDLE_FP(3)));
ST7789V_TEST(ret, st7789v_write_data(ctx,
ST7789V_PORCTRL_PARTIAL_BP(3) |
ST7789V_PORCTRL_PARTIAL_FP(3)));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_GCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_GCTRL_VGLS(5) |
ST7789V_GCTRL_VGHS(3)));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VCOMS_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0x2b));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_LCMCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_LCMCTRL_XMH |
ST7789V_LCMCTRL_XMX |
ST7789V_LCMCTRL_XBGR));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVVRHEN_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_VDVVRHEN_CMDEN));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VRHS_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_VDVS_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0x20));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_FRCTRL2_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0xf));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PWCTRL1_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_MAGIC));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PWCTRL1_AVDD(2) |
ST7789V_PWCTRL1_AVCL(2) |
ST7789V_PWCTRL1_VDS(1)));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PVGAMCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP63(0xd)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP1(0xca)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP2(0xe)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP4(8)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP6(9)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP13(7)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP20(0x2d)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP27(0xb) |
ST7789V_PVGAMCTRL_VP36(3)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP43(0x3d)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_JP1(3) |
ST7789V_PVGAMCTRL_VP50(4)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP57(0xa)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP59(0xa)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP61(0x1b)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_PVGAMCTRL_VP62(0x28)));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_NVGAMCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN63(0xd)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN1(0xca)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN2(0xf)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN4(8)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN6(8)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN13(7)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN20(0x2e)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN27(0xc) |
ST7789V_NVGAMCTRL_VN36(5)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN43(0x40)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_JN1(3) |
ST7789V_NVGAMCTRL_VN50(4)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN57(9)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN59(0xb)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN61(0x1b)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_NVGAMCTRL_VN62(0x28)));
ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_ENTER_INVERT_MODE));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RAMCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_DM_RGB |
ST7789V_RAMCTRL_RM_RGB));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RAMCTRL_EPF(3) |
ST7789V_RAMCTRL_MAGIC));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_RGBCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_WO |
ST7789V_RGBCTRL_RCM(2) |
ST7789V_RGBCTRL_VSYNC_HIGH |
ST7789V_RGBCTRL_HSYNC_HIGH |
ST7789V_RGBCTRL_PCLK_HIGH));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_VBP(8)));
ST7789V_TEST(ret, st7789v_write_data(ctx, ST7789V_RGBCTRL_HBP(20)));
return 0;
}
static int st7789v_enable(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
if (ctx->backlight) {
ctx->backlight->props.state &= ~BL_CORE_FBBLANK;
ctx->backlight->props.power = FB_BLANK_UNBLANK;
backlight_update_status(ctx->backlight);
}
return st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_ON);
}
static int st7789v_disable(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
int ret;
ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_SET_DISPLAY_OFF));
if (ctx->backlight) {
ctx->backlight->props.power = FB_BLANK_POWERDOWN;
ctx->backlight->props.state |= BL_CORE_FBBLANK;
backlight_update_status(ctx->backlight);
}
return 0;
}
static int st7789v_unprepare(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
int ret;
ST7789V_TEST(ret, st7789v_write_command(ctx, MIPI_DCS_ENTER_SLEEP_MODE));
regulator_disable(ctx->power);
return 0;
}
static const struct drm_panel_funcs st7789v_drm_funcs = {
.disable = st7789v_disable,
.enable = st7789v_enable,
.get_modes = st7789v_get_modes,
.prepare = st7789v_prepare,
.unprepare = st7789v_unprepare,
};
static int st7789v_probe(struct spi_device *spi)
{
struct device_node *backlight;
struct st7789v *ctx;
int ret;
ctx = devm_kzalloc(&spi->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
spi_set_drvdata(spi, ctx);
ctx->spi = spi;
ctx->panel.dev = &spi->dev;
ctx->panel.funcs = &st7789v_drm_funcs;
ctx->power = devm_regulator_get(&spi->dev, "power");
if (IS_ERR(ctx->power))
return PTR_ERR(ctx->power);
ctx->reset = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset)) {
dev_err(&spi->dev, "Couldn't get our reset line\n");
return PTR_ERR(ctx->reset);
}
backlight = of_parse_phandle(spi->dev.of_node, "backlight", 0);
if (backlight) {
ctx->backlight = of_find_backlight_by_node(backlight);
of_node_put(backlight);
if (!ctx->backlight)
return -EPROBE_DEFER;
}
ret = drm_panel_add(&ctx->panel);
if (ret < 0)
goto err_free_backlight;
return 0;
err_free_backlight:
if (ctx->backlight)
put_device(&ctx->backlight->dev);
return ret;
}
static int st7789v_remove(struct spi_device *spi)
{
struct st7789v *ctx = spi_get_drvdata(spi);
drm_panel_detach(&ctx->panel);
drm_panel_remove(&ctx->panel);
if (ctx->backlight)
put_device(&ctx->backlight->dev);
return 0;
}
static const struct of_device_id st7789v_of_match[] = {
{ .compatible = "sitronix,st7789v" },
{ }
};
MODULE_DEVICE_TABLE(of, st7789v_of_match);
static struct spi_driver st7789v_driver = {
.probe = st7789v_probe,
.remove = st7789v_remove,
.driver = {
.name = "st7789v",
.of_match_table = st7789v_of_match,
},
};
module_spi_driver(st7789v_driver);
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
MODULE_DESCRIPTION("Sitronix st7789v LCD Driver");
MODULE_LICENSE("GPL v2");
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