#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/of.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 nt37700f_tianma {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *supply;
struct gpio_desc *reset_gpio;
};
static inline
struct nt37700f_tianma *to_nt37700f_tianma(struct drm_panel *panel)
{
return container_of(panel, struct nt37700f_tianma, panel);
}
static void nt37700f_tianma_reset(struct nt37700f_tianma *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
}
#define nt37700f_tianma_panel_switch_page(ctx, page) \
mipi_dsi_dcs_write_seq_multi((ctx), 0xf0, 0x55, 0xaa, 0x52, 0x08, (page))
static int nt37700f_tianma_on(struct nt37700f_tianma *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc0, 0x56);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca, 0x52);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x06);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb5, 0x2b, 0x1a);
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x01);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcd, 0x04, 0x82);
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x02);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x80);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x55);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf6, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x56);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf6, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x81);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x07);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf3, 0x07);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x05);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf3, 0x25);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x90, 0x01);
mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 1080 - 1);
mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 2160 - 1);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc0, 0x56);
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x02);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcd, 0x00);
nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x04);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd0, 0x11, 0x64);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x09);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb1, 0x20);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
return dsi_ctx.accum_err;
}
static int nt37700f_tianma_disable(struct drm_panel *panel)
{
struct nt37700f_tianma *ctx = to_nt37700f_tianma(panel);
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 50);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 100);
return dsi_ctx.accum_err;
}
static int nt37700f_tianma_prepare(struct drm_panel *panel)
{
struct nt37700f_tianma *ctx = to_nt37700f_tianma(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
dev_err(dev, "Failed to enable power supply: %d\n", ret);
return ret;
}
nt37700f_tianma_reset(ctx);
ret = nt37700f_tianma_on(ctx);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
return ret;
}
return 0;
}
static int nt37700f_tianma_unprepare(struct drm_panel *panel)
{
struct nt37700f_tianma *ctx = to_nt37700f_tianma(panel);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_disable(ctx->supply);
return 0;
}
static const struct drm_display_mode nt37700f_tianma_mode = {
.clock = (1080 + 32 + 32 + 98) * (2160 + 32 + 4 + 98) * 60 / 1000,
.hdisplay = 1080,
.hsync_start = 1080 + 32,
.hsync_end = 1080 + 32 + 32,
.htotal = 1080 + 32 + 32 + 98,
.vdisplay = 2160,
.vsync_start = 2160 + 32,
.vsync_end = 2160 + 32 + 4,
.vtotal = 2160 + 32 + 4 + 98,
.width_mm = 69,
.height_mm = 137,
.type = DRM_MODE_TYPE_DRIVER,
};
static int nt37700f_tianma_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &nt37700f_tianma_mode);
}
static const struct drm_panel_funcs nt37700f_tianma_panel_funcs = {
.prepare = nt37700f_tianma_prepare,
.unprepare = nt37700f_tianma_unprepare,
.disable = nt37700f_tianma_disable,
.get_modes = nt37700f_tianma_get_modes,
};
static int nt37700f_tianma_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 nt37700f_tianma_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 nt37700f_tianma_bl_ops = {
.update_status = nt37700f_tianma_bl_update_status,
.get_brightness = nt37700f_tianma_bl_get_brightness,
};
static struct backlight_device *
nt37700f_tianma_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 2047,
.max_brightness = 2047,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&nt37700f_tianma_bl_ops, &props);
}
static int nt37700f_tianma_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct nt37700f_tianma *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, __typeof(*ctx), panel,
&nt37700f_tianma_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->supply = devm_regulator_get(dev, "power");
if (IS_ERR(ctx->supply))
return dev_err_probe(dev, PTR_ERR(ctx->supply),
"Failed to get power-supply\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");
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
ctx->panel.prepare_prev_first = true;
ctx->panel.backlight = nt37700f_tianma_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);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
}
return 0;
}
static void nt37700f_tianma_remove(struct mipi_dsi_device *dsi)
{
struct nt37700f_tianma *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 nt37700f_tianma_of_match[] = {
{ .compatible = "novatek,nt37700f" },
{ }
};
MODULE_DEVICE_TABLE(of, nt37700f_tianma_of_match);
static struct mipi_dsi_driver nt37700f_tianma_driver = {
.probe = nt37700f_tianma_probe,
.remove = nt37700f_tianma_remove,
.driver = {
.name = "panel-novatek-nt37700f",
.of_match_table = nt37700f_tianma_of_match,
},
};
module_mipi_dsi_driver(nt37700f_tianma_driver);
MODULE_DESCRIPTION("DRM driver for nt37700f cmd mode dsi tianma panel");
MODULE_LICENSE("GPL");
