#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#define EK79007AD3_GAMMA1 0x80
#define EK79007AD3_GAMMA2 0x81
#define EK79007AD3_GAMMA3 0x82
#define EK79007AD3_GAMMA4 0x83
#define EK79007AD3_GAMMA5 0x84
#define EK79007AD3_GAMMA6 0x85
#define EK79007AD3_GAMMA7 0x86
#define EK79007AD3_PANEL_CTRL3 0xB2
struct m9189_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *supply;
struct gpio_desc *reset_gpio;
struct gpio_desc *standby_gpio;
};
static inline struct m9189_panel *to_m9189_panel(struct drm_panel *panel)
{
return container_of(panel, struct m9189_panel, panel);
}
static void m9189_reset(struct m9189_panel *m9189)
{
gpiod_set_value_cansleep(m9189->reset_gpio, 0);
msleep(20);
gpiod_set_value_cansleep(m9189->reset_gpio, 1);
msleep(30);
gpiod_set_value_cansleep(m9189->reset_gpio, 0);
msleep(55);
}
static int m9189_on(struct m9189_panel *m9189)
{
struct mipi_dsi_multi_context ctx = { .dsi = m9189->dsi };
ctx.dsi->mode_flags |= MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA1, 0x48);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA2, 0xB8);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA3, 0x88);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA4, 0x88);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA5, 0x58);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA6, 0xD2);
mipi_dsi_dcs_write_seq_multi(&ctx, EK79007AD3_GAMMA7, 0x88);
mipi_dsi_msleep(&ctx, 50);
mipi_dsi_generic_write_multi(&ctx, (u8[]){ EK79007AD3_PANEL_CTRL3, 0x70 }, 2);
mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
mipi_dsi_msleep(&ctx, 120);
mipi_dsi_dcs_set_display_on_multi(&ctx);
mipi_dsi_msleep(&ctx, 120);
return ctx.accum_err;
}
static int m9189_disable(struct drm_panel *panel)
{
struct m9189_panel *m9189 = to_m9189_panel(panel);
struct mipi_dsi_multi_context ctx = { .dsi = m9189->dsi };
ctx.dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
mipi_dsi_msleep(&ctx, 120);
gpiod_set_value_cansleep(m9189->standby_gpio, 1);
return ctx.accum_err;
}
static int m9189_prepare(struct drm_panel *panel)
{
struct m9189_panel *m9189 = to_m9189_panel(panel);
struct device *dev = &m9189->dsi->dev;
int ret;
ret = regulator_enable(m9189->supply);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators: %d\n", ret);
return ret;
}
gpiod_set_value_cansleep(m9189->standby_gpio, 0);
msleep(20);
m9189_reset(m9189);
ret = m9189_on(m9189);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(m9189->reset_gpio, 1);
regulator_disable(m9189->supply);
return ret;
}
return 0;
}
static int m9189_unprepare(struct drm_panel *panel)
{
struct m9189_panel *m9189 = to_m9189_panel(panel);
gpiod_set_value_cansleep(m9189->standby_gpio, 1);
msleep(50);
gpiod_set_value_cansleep(m9189->reset_gpio, 1);
regulator_disable(m9189->supply);
return 0;
}
static const struct drm_display_mode m9189_mode = {
.clock = (1024 + 160 + 160 + 10) * (600 + 12 + 23 + 1) * 60 / 1000,
.hdisplay = 1024,
.hsync_start = 1024 + 160,
.hsync_end = 1024 + 160 + 160,
.htotal = 1024 + 160 + 160 + 10,
.vdisplay = 600,
.vsync_start = 600 + 12,
.vsync_end = 600 + 12 + 23,
.vtotal = 600 + 12 + 23 + 1,
.width_mm = 154,
.height_mm = 86,
};
static int m9189_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &m9189_mode);
}
static const struct drm_panel_funcs m9189_panel_funcs = {
.prepare = m9189_prepare,
.unprepare = m9189_unprepare,
.disable = m9189_disable,
.get_modes = m9189_get_modes,
};
static int lxd_m9189_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct m9189_panel *m9189;
int ret;
m9189 = devm_drm_panel_alloc(dev, __typeof(*m9189), panel,
&m9189_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(m9189))
return PTR_ERR(m9189);
m9189->supply = devm_regulator_get(dev, "power");
if (IS_ERR(m9189->supply))
return dev_err_probe(dev, PTR_ERR(m9189->supply),
"Failed to get power-supply\n");
m9189->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(m9189->reset_gpio))
return dev_err_probe(dev, PTR_ERR(m9189->reset_gpio),
"Failed to get reset-gpios\n");
m9189->standby_gpio = devm_gpiod_get(dev, "standby", GPIOD_OUT_LOW);
if (IS_ERR(m9189->standby_gpio))
return dev_err_probe(dev, PTR_ERR(m9189->standby_gpio),
"Failed to get standby-gpios\n");
m9189->dsi = dsi;
mipi_dsi_set_drvdata(dsi, m9189);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST;
m9189->panel.prepare_prev_first = true;
ret = drm_panel_of_backlight(&m9189->panel);
if (ret)
return dev_err_probe(dev, ret, "Failed to get backlight\n");
drm_panel_add(&m9189->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
drm_panel_remove(&m9189->panel);
return ret;
}
return 0;
}
static void lxd_m9189_remove(struct mipi_dsi_device *dsi)
{
struct m9189_panel *m9189 = 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(&m9189->panel);
}
static const struct of_device_id lxd_m9189_of_match[] = {
{ .compatible = "lxd,m9189a" },
{ }
};
MODULE_DEVICE_TABLE(of, lxd_m9189_of_match);
static struct mipi_dsi_driver lxd_m9189_driver = {
.probe = lxd_m9189_probe,
.remove = lxd_m9189_remove,
.driver = {
.name = "panel-lxd-m9189a",
.of_match_table = lxd_m9189_of_match,
},
};
module_mipi_dsi_driver(lxd_m9189_driver);
MODULE_DESCRIPTION("DRM driver for LXD M9189A MIPI-DSI panels");
MODULE_LICENSE("GPL");
