1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2016 XiaoMi, Inc. 4 * Copyright (c) 2024 Svyatoslav Ryhel <clamor95@gmail.com> 5 */ 6 7 #include <linux/delay.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/of_graph.h> 12 #include <linux/regulator/consumer.h> 13 14 #include <video/mipi_display.h> 15 16 #include <drm/drm_connector.h> 17 #include <drm/drm_crtc.h> 18 #include <drm/drm_device.h> 19 #include <drm/drm_mipi_dsi.h> 20 #include <drm/drm_modes.h> 21 #include <drm/drm_panel.h> 22 #include <drm/drm_probe_helper.h> 23 24 static const struct regulator_bulk_data sharp_supplies[] = { 25 { .supply = "avdd" }, { .supply = "vddio" }, 26 { .supply = "vsp" }, { .supply = "vsn" }, 27 }; 28 29 struct sharp_panel { 30 struct drm_panel panel; 31 struct mipi_dsi_device *dsi[2]; 32 33 struct gpio_desc *reset_gpio; 34 struct regulator_bulk_data *supplies; 35 36 const struct drm_display_mode *mode; 37 }; 38 39 static inline struct sharp_panel *to_sharp_panel(struct drm_panel *panel) 40 { 41 return container_of(panel, struct sharp_panel, panel); 42 } 43 44 static void sharp_panel_reset(struct sharp_panel *sharp) 45 { 46 gpiod_set_value_cansleep(sharp->reset_gpio, 1); 47 usleep_range(2000, 3000); 48 gpiod_set_value_cansleep(sharp->reset_gpio, 0); 49 usleep_range(2000, 3000); 50 } 51 52 static int sharp_panel_prepare(struct drm_panel *panel) 53 { 54 struct sharp_panel *sharp = to_sharp_panel(panel); 55 struct device *dev = panel->dev; 56 struct mipi_dsi_device *dsi0 = sharp->dsi[0]; 57 struct mipi_dsi_device *dsi1 = sharp->dsi[1]; 58 struct mipi_dsi_multi_context dsi_ctx = { .dsi = NULL }; 59 int ret; 60 61 ret = regulator_bulk_enable(ARRAY_SIZE(sharp_supplies), sharp->supplies); 62 if (ret) { 63 dev_err(dev, "error enabling regulators (%d)\n", ret); 64 return ret; 65 } 66 67 msleep(24); 68 69 if (sharp->reset_gpio) 70 sharp_panel_reset(sharp); 71 72 msleep(32); 73 74 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, MIPI_DCS_EXIT_SLEEP_MODE); 75 mipi_dsi_msleep(&dsi_ctx, 120); 76 77 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, 78 MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0xff); 79 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, 80 MIPI_DCS_WRITE_POWER_SAVE, 0x01); 81 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, 82 MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2c); 83 84 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, MIPI_DCS_SET_DISPLAY_ON); 85 86 return 0; 87 } 88 89 static int sharp_panel_unprepare(struct drm_panel *panel) 90 { 91 struct sharp_panel *sharp = to_sharp_panel(panel); 92 struct mipi_dsi_device *dsi0 = sharp->dsi[0]; 93 struct mipi_dsi_device *dsi1 = sharp->dsi[1]; 94 struct mipi_dsi_multi_context dsi_ctx = { .dsi = NULL }; 95 96 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, MIPI_DCS_SET_DISPLAY_OFF); 97 mipi_dsi_msleep(&dsi_ctx, 100); 98 mipi_dsi_dual_dcs_write_seq_multi(&dsi_ctx, dsi0, dsi1, MIPI_DCS_ENTER_SLEEP_MODE); 99 mipi_dsi_msleep(&dsi_ctx, 150); 100 101 if (sharp->reset_gpio) 102 gpiod_set_value_cansleep(sharp->reset_gpio, 1); 103 104 return regulator_bulk_disable(ARRAY_SIZE(sharp_supplies), sharp->supplies); 105 } 106 107 static const struct drm_display_mode default_mode = { 108 .clock = (1536 + 136 + 28 + 28) * (2048 + 14 + 8 + 2) * 60 / 1000, 109 .hdisplay = 1536, 110 .hsync_start = 1536 + 136, 111 .hsync_end = 1536 + 136 + 28, 112 .htotal = 1536 + 136 + 28 + 28, 113 .vdisplay = 2048, 114 .vsync_start = 2048 + 14, 115 .vsync_end = 2048 + 14 + 8, 116 .vtotal = 2048 + 14 + 8 + 2, 117 .width_mm = 120, 118 .height_mm = 160, 119 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 120 }; 121 122 static int sharp_panel_get_modes(struct drm_panel *panel, 123 struct drm_connector *connector) 124 { 125 return drm_connector_helper_get_modes_fixed(connector, &default_mode); 126 } 127 128 static const struct drm_panel_funcs sharp_panel_funcs = { 129 .unprepare = sharp_panel_unprepare, 130 .prepare = sharp_panel_prepare, 131 .get_modes = sharp_panel_get_modes, 132 }; 133 134 static int sharp_panel_probe(struct mipi_dsi_device *dsi) 135 { 136 const struct mipi_dsi_device_info info = { "sharp-link1", 0, NULL }; 137 struct device *dev = &dsi->dev; 138 struct device_node *dsi_r; 139 struct mipi_dsi_host *dsi_r_host; 140 struct sharp_panel *sharp; 141 int i, ret; 142 143 sharp = devm_drm_panel_alloc(dev, struct sharp_panel, panel, 144 &sharp_panel_funcs, DRM_MODE_CONNECTOR_DSI); 145 if (IS_ERR(sharp)) 146 return PTR_ERR(sharp); 147 148 ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(sharp_supplies), 149 sharp_supplies, &sharp->supplies); 150 if (ret) 151 return dev_err_probe(dev, ret, "failed to get supplies\n"); 152 153 sharp->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 154 if (IS_ERR(sharp->reset_gpio)) 155 return dev_err_probe(dev, PTR_ERR(sharp->reset_gpio), 156 "failed to get reset GPIO\n"); 157 158 /* Panel is always connected to two DSI hosts, DSI0 is left, DSI1 is right */ 159 dsi_r = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); 160 if (!dsi_r) 161 return dev_err_probe(dev, -ENODEV, "failed to find second DSI host node\n"); 162 163 dsi_r_host = of_find_mipi_dsi_host_by_node(dsi_r); 164 of_node_put(dsi_r); 165 if (!dsi_r_host) 166 return dev_err_probe(dev, -EPROBE_DEFER, "cannot get secondary DSI host\n"); 167 168 sharp->dsi[1] = devm_mipi_dsi_device_register_full(dev, dsi_r_host, &info); 169 if (IS_ERR(sharp->dsi[1])) 170 return dev_err_probe(dev, PTR_ERR(sharp->dsi[1]), 171 "second link registration failed\n"); 172 173 sharp->dsi[0] = dsi; 174 mipi_dsi_set_drvdata(dsi, sharp); 175 176 ret = drm_panel_of_backlight(&sharp->panel); 177 if (ret) 178 return dev_err_probe(dev, ret, "Failed to get backlight\n"); 179 180 drm_panel_add(&sharp->panel); 181 182 for (i = 0; i < ARRAY_SIZE(sharp->dsi); i++) { 183 if (!sharp->dsi[i]) 184 continue; 185 186 sharp->dsi[i]->lanes = 4; 187 sharp->dsi[i]->format = MIPI_DSI_FMT_RGB888; 188 sharp->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM; 189 190 ret = devm_mipi_dsi_attach(dev, sharp->dsi[i]); 191 if (ret < 0) { 192 drm_panel_remove(&sharp->panel); 193 return dev_err_probe(dev, ret, "failed to attach to DSI%d\n", i); 194 } 195 } 196 197 return 0; 198 } 199 200 static void sharp_panel_remove(struct mipi_dsi_device *dsi) 201 { 202 struct sharp_panel *sharp = mipi_dsi_get_drvdata(dsi); 203 204 drm_panel_remove(&sharp->panel); 205 } 206 207 static const struct of_device_id sharp_of_match[] = { 208 { .compatible = "sharp,lq079l1sx01" }, 209 { } 210 }; 211 MODULE_DEVICE_TABLE(of, sharp_of_match); 212 213 static struct mipi_dsi_driver sharp_panel_driver = { 214 .driver = { 215 .name = "panel-sharp-lq079l1sx01", 216 .of_match_table = sharp_of_match, 217 }, 218 .probe = sharp_panel_probe, 219 .remove = sharp_panel_remove, 220 }; 221 module_mipi_dsi_driver(sharp_panel_driver); 222 223 MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>"); 224 MODULE_DESCRIPTION("Sharp LQ079L1SX01 panel driver"); 225 MODULE_LICENSE("GPL"); 226