1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021 Raffaele Tranquillini <raffaele.tranquillini@gmail.com> 4 * 5 * Generated using linux-mdss-dsi-panel-driver-generator from Lineage OS device tree: 6 * https://github.com/LineageOS/android_kernel_xiaomi_msm8996/blob/lineage-18.1/arch/arm/boot/dts/qcom/a1-msm8996-mtp.dtsi 7 */ 8 9 #include <linux/delay.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 14 #include <video/mipi_display.h> 15 16 #include <drm/drm_mipi_dsi.h> 17 #include <drm/drm_modes.h> 18 #include <drm/drm_panel.h> 19 20 struct jdi_fhd_r63452 { 21 struct drm_panel panel; 22 struct mipi_dsi_device *dsi; 23 struct gpio_desc *reset_gpio; 24 }; 25 26 static inline struct jdi_fhd_r63452 *to_jdi_fhd_r63452(struct drm_panel *panel) 27 { 28 return container_of(panel, struct jdi_fhd_r63452, panel); 29 } 30 31 static void jdi_fhd_r63452_reset(struct jdi_fhd_r63452 *ctx) 32 { 33 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 34 usleep_range(10000, 11000); 35 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 36 usleep_range(1000, 2000); 37 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 38 usleep_range(10000, 11000); 39 } 40 41 static int jdi_fhd_r63452_on(struct jdi_fhd_r63452 *ctx) 42 { 43 struct mipi_dsi_device *dsi = ctx->dsi; 44 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; 45 46 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 47 48 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00); 49 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01); 50 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec, 51 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b, 52 0x13, 0x15, 0x68, 0x0b, 0xb5); 53 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03); 54 55 mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 56 57 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00); 58 59 mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, 0x77); 60 mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 0x0437); 61 mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x077f); 62 mipi_dsi_dcs_set_tear_scanline_multi(&dsi_ctx, 0x0000); 63 mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00ff); 64 65 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24); 66 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00); 67 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS, 0x00); 68 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 0x00); 69 70 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); 71 mipi_dsi_msleep(&dsi_ctx, 20); 72 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); 73 mipi_dsi_msleep(&dsi_ctx, 80); 74 75 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04); 76 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 0x00); 77 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x11); 78 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03); 79 80 return dsi_ctx.accum_err; 81 } 82 83 static void jdi_fhd_r63452_off(struct jdi_fhd_r63452 *ctx) 84 { 85 struct mipi_dsi_device *dsi = ctx->dsi; 86 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; 87 88 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 89 90 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00); 91 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01); 92 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec, 93 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b, 94 0x13, 0x15, 0x68, 0x0b, 0x95); 95 mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03); 96 97 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); 98 mipi_dsi_usleep_range(&dsi_ctx, 2000, 3000); 99 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); 100 mipi_dsi_msleep(&dsi_ctx, 120); 101 } 102 103 static int jdi_fhd_r63452_prepare(struct drm_panel *panel) 104 { 105 struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel); 106 int ret; 107 108 jdi_fhd_r63452_reset(ctx); 109 110 ret = jdi_fhd_r63452_on(ctx); 111 if (ret < 0) 112 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 113 114 return ret; 115 } 116 117 static int jdi_fhd_r63452_unprepare(struct drm_panel *panel) 118 { 119 struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel); 120 121 /* 122 * NOTE: We don't return an error here as while the panel won't have 123 * been cleanly turned off at least we've asserted the reset signal 124 * so it should be safe to power it back on again later 125 */ 126 jdi_fhd_r63452_off(ctx); 127 128 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 129 130 return 0; 131 } 132 133 static const struct drm_display_mode jdi_fhd_r63452_mode = { 134 .clock = (1080 + 120 + 16 + 40) * (1920 + 4 + 2 + 4) * 60 / 1000, 135 .hdisplay = 1080, 136 .hsync_start = 1080 + 120, 137 .hsync_end = 1080 + 120 + 16, 138 .htotal = 1080 + 120 + 16 + 40, 139 .vdisplay = 1920, 140 .vsync_start = 1920 + 4, 141 .vsync_end = 1920 + 4 + 2, 142 .vtotal = 1920 + 4 + 2 + 4, 143 .width_mm = 64, 144 .height_mm = 114, 145 }; 146 147 static int jdi_fhd_r63452_get_modes(struct drm_panel *panel, 148 struct drm_connector *connector) 149 { 150 struct drm_display_mode *mode; 151 152 mode = drm_mode_duplicate(connector->dev, &jdi_fhd_r63452_mode); 153 if (!mode) 154 return -ENOMEM; 155 156 drm_mode_set_name(mode); 157 158 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 159 connector->display_info.width_mm = mode->width_mm; 160 connector->display_info.height_mm = mode->height_mm; 161 drm_mode_probed_add(connector, mode); 162 163 return 1; 164 } 165 166 static const struct drm_panel_funcs jdi_fhd_r63452_panel_funcs = { 167 .prepare = jdi_fhd_r63452_prepare, 168 .unprepare = jdi_fhd_r63452_unprepare, 169 .get_modes = jdi_fhd_r63452_get_modes, 170 }; 171 172 static int jdi_fhd_r63452_probe(struct mipi_dsi_device *dsi) 173 { 174 struct device *dev = &dsi->dev; 175 struct jdi_fhd_r63452 *ctx; 176 int ret; 177 178 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 179 if (!ctx) 180 return -ENOMEM; 181 182 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 183 if (IS_ERR(ctx->reset_gpio)) 184 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 185 "Failed to get reset-gpios\n"); 186 187 ctx->dsi = dsi; 188 mipi_dsi_set_drvdata(dsi, ctx); 189 190 dsi->lanes = 4; 191 dsi->format = MIPI_DSI_FMT_RGB888; 192 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | 193 MIPI_DSI_CLOCK_NON_CONTINUOUS; 194 195 drm_panel_init(&ctx->panel, dev, &jdi_fhd_r63452_panel_funcs, 196 DRM_MODE_CONNECTOR_DSI); 197 ctx->panel.prepare_prev_first = true; 198 199 ret = drm_panel_of_backlight(&ctx->panel); 200 if (ret) 201 return dev_err_probe(dev, ret, "Failed to get backlight\n"); 202 203 drm_panel_add(&ctx->panel); 204 205 ret = mipi_dsi_attach(dsi); 206 if (ret < 0) { 207 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 208 return ret; 209 } 210 211 return 0; 212 } 213 214 static void jdi_fhd_r63452_remove(struct mipi_dsi_device *dsi) 215 { 216 struct jdi_fhd_r63452 *ctx = mipi_dsi_get_drvdata(dsi); 217 int ret; 218 219 ret = mipi_dsi_detach(dsi); 220 if (ret < 0) 221 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 222 223 drm_panel_remove(&ctx->panel); 224 } 225 226 static const struct of_device_id jdi_fhd_r63452_of_match[] = { 227 { .compatible = "jdi,fhd-r63452" }, 228 { /* sentinel */ } 229 }; 230 MODULE_DEVICE_TABLE(of, jdi_fhd_r63452_of_match); 231 232 static struct mipi_dsi_driver jdi_fhd_r63452_driver = { 233 .probe = jdi_fhd_r63452_probe, 234 .remove = jdi_fhd_r63452_remove, 235 .driver = { 236 .name = "panel-jdi-fhd-r63452", 237 .of_match_table = jdi_fhd_r63452_of_match, 238 }, 239 }; 240 module_mipi_dsi_driver(jdi_fhd_r63452_driver); 241 242 MODULE_AUTHOR("Raffaele Tranquillini <raffaele.tranquillini@gmail.com>"); 243 MODULE_DESCRIPTION("DRM driver for JDI FHD R63452 DSI panel, command mode"); 244 MODULE_LICENSE("GPL v2"); 245