Quelle  panel-boe-bf060y8m-aj0.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * BOE BF060Y8M-AJ0 5.99" MIPI-DSI OLED Panel on SW43404 DriverIC
 *
 * Copyright (c) 2020 AngeloGioacchino Del Regno
 *                    <angelogioacchino.delregno@somainline.org>
 */

#include <linux/backlight.h>
#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>

#define DCS_ALLOW_HBM_RANGE  0x0c
#define DCS_DISALLOW_HBM_RANGE  0x08

enum boe_bf060y8m_aj0_supplies {
 BF060Y8M_VREG_VCC,
 BF060Y8M_VREG_VDDIO,
 BF060Y8M_VREG_VCI,
 BF060Y8M_VREG_EL_VDD,
 BF060Y8M_VREG_EL_VSS,
 BF060Y8M_VREG_MAX
};

struct boe_bf060y8m_aj0 {
 struct drm_panel panel;
 struct mipi_dsi_device *dsi;
 struct regulator_bulk_data vregs[BF060Y8M_VREG_MAX];
 struct gpio_desc *reset_gpio;
};

static inline
struct boe_bf060y8m_aj0 *to_boe_bf060y8m_aj0(struct drm_panel *panel)
{
 return container_of(panel, struct boe_bf060y8m_aj0, panel);
}

static void boe_bf060y8m_aj0_reset(struct boe_bf060y8m_aj0 *boe)
{
 gpiod_set_value_cansleep(boe->reset_gpio, 0);
 usleep_range(2000, 3000);
 gpiod_set_value_cansleep(boe->reset_gpio, 1);
 usleep_range(15000, 16000);
 gpiod_set_value_cansleep(boe->reset_gpio, 0);
 usleep_range(5000, 6000);
}

static int boe_bf060y8m_aj0_on(struct boe_bf060y8m_aj0 *boe)
{
 struct mipi_dsi_device *dsi = boe->dsi;
 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0xa5, 0x00);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb2, 0x00, 0x4c);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_3D_CONTROL, 0x10);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, DCS_ALLOW_HBM_RANGE);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf8,
         0x00, 0x08, 0x10, 0x00, 0x22, 0x00, 0x00, 0x2d);

 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
 mipi_dsi_msleep(&dsi_ctx, 30);

 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0xa5, 0x00);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc0,
         0x08, 0x48, 0x65, 0x33, 0x33, 0x33,
         0x2a, 0x31, 0x39, 0x20, 0x09);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc1, 0x00, 0x00, 0x00, 0x1f, 0x1f,
         0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f,
         0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe2, 0x20, 0x04, 0x10, 0x12, 0x92,
         0x4f, 0x8f, 0x44, 0x84, 0x83, 0x83, 0x83,
         0x5c, 0x5c, 0x5c);
 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xde, 0x01, 0x2c, 0x00, 0x77, 0x3e);

 mipi_dsi_msleep(&dsi_ctx, 30);

 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 mipi_dsi_msleep(&dsi_ctx, 50);

 return dsi_ctx.accum_err;
}

static void boe_bf060y8m_aj0_off(struct boe_bf060y8m_aj0 *boe)
{
 struct mipi_dsi_device *dsi = boe->dsi;
 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

 /* OFF commands sent in HS mode */
 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
 mipi_dsi_msleep(&dsi_ctx, 20);

 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
 mipi_dsi_usleep_range(&dsi_ctx, 1000, 2000);
 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
}

static int boe_bf060y8m_aj0_prepare(struct drm_panel *panel)
{
 struct boe_bf060y8m_aj0 *boe = to_boe_bf060y8m_aj0(panel);
 int ret;

 /*
 * Enable EL Driving Voltage first - doing that at the beginning
 * or at the end of the power sequence doesn't matter, so enable
 * it here to avoid yet another usleep at the end.
 */
 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_EL_VDD].consumer);
 if (ret)
  return ret;
 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_EL_VSS].consumer);
 if (ret)
  goto err_elvss;

 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VCC].consumer);
 if (ret)
  goto err_vcc;
 usleep_range(1000, 2000);
 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VDDIO].consumer);
 if (ret)
  goto err_vddio;
 usleep_range(500, 1000);
 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VCI].consumer);
 if (ret)
  goto err_vci;
 usleep_range(2000, 3000);

 boe_bf060y8m_aj0_reset(boe);

 ret = boe_bf060y8m_aj0_on(boe);
 if (ret < 0) {
  gpiod_set_value_cansleep(boe->reset_gpio, 1);
  goto err_on;
 }

 return 0;

err_on:
 regulator_disable(boe->vregs[BF060Y8M_VREG_VCI].consumer);
err_vci:
 regulator_disable(boe->vregs[BF060Y8M_VREG_VDDIO].consumer);
err_vddio:
 regulator_disable(boe->vregs[BF060Y8M_VREG_VCC].consumer);
err_vcc:
 regulator_disable(boe->vregs[BF060Y8M_VREG_EL_VSS].consumer);
err_elvss:
 regulator_disable(boe->vregs[BF060Y8M_VREG_EL_VDD].consumer);
 return ret;
}

static int boe_bf060y8m_aj0_unprepare(struct drm_panel *panel)
{
 struct boe_bf060y8m_aj0 *boe = to_boe_bf060y8m_aj0(panel);

 boe_bf060y8m_aj0_off(boe);

 gpiod_set_value_cansleep(boe->reset_gpio, 1);
 regulator_bulk_disable(ARRAY_SIZE(boe->vregs), boe->vregs);

 return 0;
}

static const struct drm_display_mode boe_bf060y8m_aj0_mode = {
 .clock = 165268,
 .hdisplay = 1080,
 .hsync_start = 1080 + 36,
 .hsync_end = 1080 + 36 + 24,
 .htotal = 1080 + 36 + 24 + 96,
 .vdisplay = 2160,
 .vsync_start = 2160 + 16,
 .vsync_end = 2160 + 16 + 1,
 .vtotal = 2160 + 16 + 1 + 15,
 .width_mm = 68,   /* 68.04 mm */
 .height_mm = 136, /* 136.08 mm */
};

static int boe_bf060y8m_aj0_get_modes(struct drm_panel *panel,
          struct drm_connector *connector)
{
 struct drm_display_mode *mode;

 mode = drm_mode_duplicate(connector->dev, &boe_bf060y8m_aj0_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 boe_bf060y8m_aj0_panel_funcs = {
 .prepare = boe_bf060y8m_aj0_prepare,
 .unprepare = boe_bf060y8m_aj0_unprepare,
 .get_modes = boe_bf060y8m_aj0_get_modes,
};

static int boe_bf060y8m_aj0_bl_update_status(struct backlight_device *bl)
{
 struct mipi_dsi_device *dsi = bl_get_data(bl);
 u16 brightness = backlight_get_brightness(bl);
 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

 mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, brightness);

 return dsi_ctx.accum_err;
}

static int boe_bf060y8m_aj0_bl_get_brightness(struct backlight_device *bl)
{
 struct mipi_dsi_device *dsi = bl_get_data(bl);
 u16 brightness;
 int ret;

 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
 if (ret < 0)
  return ret;

 return brightness & 0xff;
}

static const struct backlight_ops boe_bf060y8m_aj0_bl_ops = {
 .update_status = boe_bf060y8m_aj0_bl_update_status,
 .get_brightness = boe_bf060y8m_aj0_bl_get_brightness,
};

static struct backlight_device *
boe_bf060y8m_aj0_create_backlight(struct mipi_dsi_device *dsi)
{
 struct device *dev = &dsi->dev;
 const struct backlight_properties props = {
  .type = BACKLIGHT_RAW,
  .brightness = 127,
  .max_brightness = 255,
  .scale = BACKLIGHT_SCALE_NON_LINEAR,
 };

 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
           &boe_bf060y8m_aj0_bl_ops, &props);
}

static int boe_bf060y8m_aj0_init_vregs(struct boe_bf060y8m_aj0 *boe,
           struct device *dev)
{
 struct regulator *vreg;
 int ret;

 boe->vregs[BF060Y8M_VREG_VCC].supply = "vcc";
 boe->vregs[BF060Y8M_VREG_VDDIO].supply = "vddio";
 boe->vregs[BF060Y8M_VREG_VCI].supply = "vci";
 boe->vregs[BF060Y8M_VREG_EL_VDD].supply = "elvdd";
 boe->vregs[BF060Y8M_VREG_EL_VSS].supply = "elvss";
 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(boe->vregs),
          boe->vregs);
 if (ret < 0) {
  dev_err(dev, "Failed to get regulators: %d\n", ret);
  return ret;
 }

 vreg = boe->vregs[BF060Y8M_VREG_VCC].consumer;
 ret = regulator_is_supported_voltage(vreg, 2700000, 3600000);
 if (!ret)
  return ret;

 vreg = boe->vregs[BF060Y8M_VREG_VDDIO].consumer;
 ret = regulator_is_supported_voltage(vreg, 1620000, 1980000);
 if (!ret)
  return ret;

 vreg = boe->vregs[BF060Y8M_VREG_VCI].consumer;
 ret = regulator_is_supported_voltage(vreg, 2600000, 3600000);
 if (!ret)
  return ret;

 vreg = boe->vregs[BF060Y8M_VREG_EL_VDD].consumer;
 ret = regulator_is_supported_voltage(vreg, 4400000, 4800000);
 if (!ret)
  return ret;

 /* ELVSS is negative: -5.00V to -1.40V */
 vreg = boe->vregs[BF060Y8M_VREG_EL_VSS].consumer;
 ret = regulator_is_supported_voltage(vreg, 1400000, 5000000);
 if (!ret)
  return ret;

 /*
 * Set min/max rated current, known only for VCI and VDDIO and,
 * in case of failure, just go on gracefully, as this step is not
 * guaranteed to succeed on all regulator HW but do a debug print
 * to inform the developer during debugging.
 * In any case, these two supplies are also optional, so they may
 * be fixed-regulator which, at the time of writing, does not
 * support fake current limiting.
 */
 vreg = boe->vregs[BF060Y8M_VREG_VDDIO].consumer;
 ret = regulator_set_current_limit(vreg, 1500, 2500);
 if (ret)
  dev_dbg(dev, "Current limit cannot be set on %s: %d\n",
   boe->vregs[1].supply, ret);

 vreg = boe->vregs[BF060Y8M_VREG_VCI].consumer;
 ret = regulator_set_current_limit(vreg, 20000, 40000);
 if (ret)
  dev_dbg(dev, "Current limit cannot be set on %s: %d\n",
   boe->vregs[2].supply, ret);

 return 0;
}

static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi)
{
 struct device *dev = &dsi->dev;
 struct boe_bf060y8m_aj0 *boe;
 int ret;

 boe = devm_drm_panel_alloc(dev, struct boe_bf060y8m_aj0, panel,
       &boe_bf060y8m_aj0_panel_funcs,
       DRM_MODE_CONNECTOR_DSI);
 if (IS_ERR(boe))
  return PTR_ERR(boe);

 ret = boe_bf060y8m_aj0_init_vregs(boe, dev);
 if (ret)
  return dev_err_probe(dev, ret,
         "Failed to initialize supplies.\n");

 boe->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
 if (IS_ERR(boe->reset_gpio))
  return dev_err_probe(dev, PTR_ERR(boe->reset_gpio),
         "Failed to get reset-gpios\n");

 boe->dsi = dsi;
 mipi_dsi_set_drvdata(dsi, boe);

 dsi->lanes = 4;
 dsi->format = MIPI_DSI_FMT_RGB888;
 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET |
     MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
     MIPI_DSI_CLOCK_NON_CONTINUOUS |
     MIPI_DSI_MODE_LPM;

 boe->panel.prepare_prev_first = true;

 boe->panel.backlight = boe_bf060y8m_aj0_create_backlight(dsi);
 if (IS_ERR(boe->panel.backlight))
  return dev_err_probe(dev, PTR_ERR(boe->panel.backlight),
         "Failed to create backlight\n");

 drm_panel_add(&boe->panel);

 ret = mipi_dsi_attach(dsi);
 if (ret < 0) {
  dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
  return ret;
 }

 return 0;
}

static void boe_bf060y8m_aj0_remove(struct mipi_dsi_device *dsi)
{
 struct boe_bf060y8m_aj0 *boe = 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(&boe->panel);
}

static const struct of_device_id boe_bf060y8m_aj0_of_match[] = {
 { .compatible = "boe,bf060y8m-aj0" },
 { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, boe_bf060y8m_aj0_of_match);

static struct mipi_dsi_driver boe_bf060y8m_aj0_driver = {
 .probe = boe_bf060y8m_aj0_probe,
 .remove = boe_bf060y8m_aj0_remove,
 .driver = {
  .name = "panel-sw43404-boe-fhd-amoled",
  .of_match_table = boe_bf060y8m_aj0_of_match,
 },
};
module_mipi_dsi_driver(boe_bf060y8m_aj0_driver);

MODULE_AUTHOR("AngeloGioacchino Del Regno ");
MODULE_DESCRIPTION("BOE BF060Y8M-AJ0 MIPI-DSI OLED panel");
MODULE_LICENSE("GPL v2");