#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.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>
#include <drm/drm_probe_helper.h>
struct rm69380_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi[2];
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
};
static inline
struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel)
{
return container_of(panel, struct rm69380_panel, panel);
}
static void rm69380_reset(struct rm69380_panel *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(15000, 16000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(30);
}
static int rm69380_on(struct rm69380_panel *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi[0];
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
if (ctx->dsi[1])
ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd4);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x00, 0x80);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd0);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x48, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x26);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x75, 0x3f);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x1d, 0x1a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc2, 0x08);
mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 20);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 36);
return dsi_ctx.accum_err;
}
static void rm69380_off(struct rm69380_panel *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi[0];
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
if (ctx->dsi[1])
ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 35);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 20);
}
static int rm69380_prepare(struct drm_panel *panel)
{
struct rm69380_panel *ctx = to_rm69380_panel(panel);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
rm69380_reset(ctx);
ret = rm69380_on(ctx);
if (ret < 0) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
return ret;
}
static int rm69380_unprepare(struct drm_panel *panel)
{
struct rm69380_panel *ctx = to_rm69380_panel(panel);
rm69380_off(ctx);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
return 0;
}
static const struct drm_display_mode rm69380_mode = {
.clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000,
.hdisplay = 2560,
.hsync_start = 2560 + 32,
.hsync_end = 2560 + 32 + 12,
.htotal = 2560 + 32 + 12 + 38,
.vdisplay = 1600,
.vsync_start = 1600 + 20,
.vsync_end = 1600 + 20 + 4,
.vtotal = 1600 + 20 + 4 + 8,
.width_mm = 248,
.height_mm = 155,
.type = DRM_MODE_TYPE_DRIVER,
};
static int rm69380_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode);
}
static const struct drm_panel_funcs rm69380_panel_funcs = {
.prepare = rm69380_prepare,
.unprepare = rm69380_unprepare,
.get_modes = rm69380_get_modes,
};
static int rm69380_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return 0;
}
static int rm69380_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness;
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return brightness;
}
static const struct backlight_ops rm69380_bl_ops = {
.update_status = rm69380_bl_update_status,
.get_brightness = rm69380_bl_get_brightness,
};
static struct backlight_device *
rm69380_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 511,
.max_brightness = 2047,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&rm69380_bl_ops, &props);
}
static int rm69380_probe(struct mipi_dsi_device *dsi)
{
struct mipi_dsi_host *dsi_sec_host;
struct rm69380_panel *ctx;
struct device *dev = &dsi->dev;
struct device_node *dsi_sec;
int ret, i;
ctx = devm_drm_panel_alloc(dev, struct rm69380_panel, panel,
&rm69380_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->supplies[0].supply = "vddio";
ctx->supplies[1].supply = "avdd";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to get regulators\n");
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"Failed to get reset-gpios\n");
dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
if (dsi_sec) {
const struct mipi_dsi_device_info info = { "RM69380 DSI1", 0,
dsi_sec };
dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec);
of_node_put(dsi_sec);
if (!dsi_sec_host)
return dev_err_probe(dev, -EPROBE_DEFER,
"Cannot get secondary DSI host\n");
ctx->dsi[1] =
devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info);
if (IS_ERR(ctx->dsi[1]))
return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]),
"Cannot get secondary DSI node\n");
mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
}
ctx->dsi[0] = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
ctx->panel.prepare_prev_first = true;
ctx->panel.backlight = rm69380_create_backlight(dsi);
if (IS_ERR(ctx->panel.backlight))
return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
"Failed to create backlight\n");
drm_panel_add(&ctx->panel);
for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
if (!ctx->dsi[i])
continue;
dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i);
ctx->dsi[i]->lanes = 4;
ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888;
ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return dev_err_probe(dev, ret,
"Failed to attach to DSI%d\n", i);
}
}
return 0;
}
static void rm69380_remove(struct mipi_dsi_device *dsi)
{
struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id rm69380_of_match[] = {
{ .compatible = "lenovo,j716f-edo-rm69380" },
{ }
};
MODULE_DEVICE_TABLE(of, rm69380_of_match);
static struct mipi_dsi_driver rm69380_panel_driver = {
.probe = rm69380_probe,
.remove = rm69380_remove,
.driver = {
.name = "panel-raydium-rm69380",
.of_match_table = rm69380_of_match,
},
};
module_mipi_dsi_driver(rm69380_panel_driver);
MODULE_AUTHOR("David Wronek <david@mainlining.org");
MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels");
MODULE_LICENSE("GPL");
