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// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2019, Michael Srba
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct s6e88a0_ams452ef01 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
};
static inline struct
s6e88a0_ams452ef01 *to_s6e88a0_ams452ef01(struct drm_panel *panel)
{
return container_of(panel, struct s6e88a0_ams452ef01, panel);
}
static void s6e88a0_ams452ef01_reset(struct s6e88a0_ams452ef01 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(5000, 6000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(10000, 11000);
}
static int s6e88a0_ams452ef01_on(struct s6e88a0_ams452ef01 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a); // enable LEVEL2 commands
mipi_dsi_dcs_write_seq(dsi, 0xcc, 0x4c); // set Pixel Clock Divider polarity
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
msleep(120);
// set default brightness/gama
mipi_dsi_dcs_write_seq(dsi, 0xca,
0x01, 0x00, 0x01, 0x00, 0x01, 0x00, // V255 RR,GG,BB
0x80, 0x80, 0x80, // V203 R,G,B
0x80, 0x80, 0x80, // V151 R,G,B
0x80, 0x80, 0x80, // V87 R,G,B
0x80, 0x80, 0x80, // V51 R,G,B
0x80, 0x80, 0x80, // V35 R,G,B
0x80, 0x80, 0x80, // V23 R,G,B
0x80, 0x80, 0x80, // V11 R,G,B
0x6b, 0x68, 0x71, // V3 R,G,B
0x00, 0x00, 0x00); // V1 R,G,B
// set default Amoled Off Ratio
mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x40, 0x0a, 0x17, 0x00, 0x0a);
mipi_dsi_dcs_write_seq(dsi, 0xb6, 0x2c, 0x0b); // set default elvss voltage
mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
mipi_dsi_dcs_write_seq(dsi, 0xf7, 0x03); // gamma/aor update
mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5); // disable LEVEL2 commands
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display on: %d\n", ret);
return ret;
}
return 0;
}
static int s6e88a0_ams452ef01_off(struct s6e88a0_ams452ef01 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display off: %d\n", ret);
return ret;
}
msleep(35);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
return ret;
}
msleep(120);
return 0;
}
static int s6e88a0_ams452ef01_prepare(struct drm_panel *panel)
{
struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators: %d\n", ret);
return ret;
}
s6e88a0_ams452ef01_reset(ctx);
ret = s6e88a0_ams452ef01_on(ctx);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
ctx->supplies);
return ret;
}
return 0;
}
static int s6e88a0_ams452ef01_unprepare(struct drm_panel *panel)
{
struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = s6e88a0_ams452ef01_off(ctx);
if (ret < 0)
dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
return 0;
}
static const struct drm_display_mode s6e88a0_ams452ef01_mode = {
.clock = (540 + 88 + 4 + 20) * (960 + 14 + 2 + 8) * 60 / 1000,
.hdisplay = 540,
.hsync_start = 540 + 88,
.hsync_end = 540 + 88 + 4,
.htotal = 540 + 88 + 4 + 20,
.vdisplay = 960,
.vsync_start = 960 + 14,
.vsync_end = 960 + 14 + 2,
.vtotal = 960 + 14 + 2 + 8,
.width_mm = 56,
.height_mm = 100,
};
static int s6e88a0_ams452ef01_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &s6e88a0_ams452ef01_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs s6e88a0_ams452ef01_panel_funcs = {
.unprepare = s6e88a0_ams452ef01_unprepare,
.prepare = s6e88a0_ams452ef01_prepare,
.get_modes = s6e88a0_ams452ef01_get_modes,
};
static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct s6e88a0_ams452ef01 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->supplies[0].supply = "vdd3";
ctx->supplies[1].supply = "vci";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to get regulators: %d\n", ret);
return ret;
}
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
ret = PTR_ERR(ctx->reset_gpio);
dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
return ret;
}
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 2;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST;
drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void s6e88a0_ams452ef01_remove(struct mipi_dsi_device *dsi)
{
struct s6e88a0_ams452ef01 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id s6e88a0_ams452ef01_of_match[] = {
{ .compatible = "samsung,s6e88a0-ams452ef01" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s6e88a0_ams452ef01_of_match);
static struct mipi_dsi_driver s6e88a0_ams452ef01_driver = {
.probe = s6e88a0_ams452ef01_probe,
.remove = s6e88a0_ams452ef01_remove,
.driver = {
.name = "panel-s6e88a0-ams452ef01",
.of_match_table = s6e88a0_ams452ef01_of_match,
},
};
module_mipi_dsi_driver(s6e88a0_ams452ef01_driver);
MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>");
MODULE_DESCRIPTION("MIPI-DSI based Panel Driver for AMS452EF01 AMOLED LCD with a S6E88A0 controller");
MODULE_LICENSE("GPL v2");
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