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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2015 Red Hat4 * Copyright (C) 2015 Sony Mobile Communications Inc.5 * Author: Werner Johansson <werner.johansson@sonymobile.com>6 *7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>8 */9 10#include <linux/delay.h>11#include <linux/gpio/consumer.h>12#include <linux/module.h>13#include <linux/of.h>14#include <linux/regulator/consumer.h>15 16#include <video/mipi_display.h>17 18#include <drm/drm_crtc.h>19#include <drm/drm_device.h>20#include <drm/drm_mipi_dsi.h>21#include <drm/drm_panel.h>22 23struct sharp_nt_panel {24 struct drm_panel base;25 struct mipi_dsi_device *dsi;26 27 struct regulator *supply;28 struct gpio_desc *reset_gpio;29};30 31static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)32{33 return container_of(panel, struct sharp_nt_panel, base);34}35 36static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)37{38 struct mipi_dsi_device *dsi = sharp_nt->dsi;39 int ret;40 41 dsi->mode_flags |= MIPI_DSI_MODE_LPM;42 43 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);44 if (ret < 0)45 return ret;46 47 msleep(120);48 49 /* Novatek two-lane operation */50 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);51 if (ret < 0)52 return ret;53 54 /* Set both MCU and RGB I/F to 24bpp */55 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |56 (MIPI_DCS_PIXEL_FMT_24BIT << 4));57 if (ret < 0)58 return ret;59 60 return 0;61}62 63static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)64{65 struct mipi_dsi_device *dsi = sharp_nt->dsi;66 int ret;67 68 dsi->mode_flags |= MIPI_DSI_MODE_LPM;69 70 ret = mipi_dsi_dcs_set_display_on(dsi);71 if (ret < 0)72 return ret;73 74 return 0;75}76 77static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)78{79 struct mipi_dsi_device *dsi = sharp_nt->dsi;80 int ret;81 82 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;83 84 ret = mipi_dsi_dcs_set_display_off(dsi);85 if (ret < 0)86 return ret;87 88 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);89 if (ret < 0)90 return ret;91 92 return 0;93}94 95static int sharp_nt_panel_unprepare(struct drm_panel *panel)96{97 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);98 int ret;99 100 ret = sharp_nt_panel_off(sharp_nt);101 if (ret < 0) {102 dev_err(panel->dev, "failed to set panel off: %d\n", ret);103 return ret;104 }105 106 regulator_disable(sharp_nt->supply);107 if (sharp_nt->reset_gpio)108 gpiod_set_value(sharp_nt->reset_gpio, 0);109 110 return 0;111}112 113static int sharp_nt_panel_prepare(struct drm_panel *panel)114{115 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);116 int ret;117 118 ret = regulator_enable(sharp_nt->supply);119 if (ret < 0)120 return ret;121 122 msleep(20);123 124 if (sharp_nt->reset_gpio) {125 gpiod_set_value(sharp_nt->reset_gpio, 1);126 msleep(1);127 gpiod_set_value(sharp_nt->reset_gpio, 0);128 msleep(1);129 gpiod_set_value(sharp_nt->reset_gpio, 1);130 msleep(10);131 }132 133 ret = sharp_nt_panel_init(sharp_nt);134 if (ret < 0) {135 dev_err(panel->dev, "failed to init panel: %d\n", ret);136 goto poweroff;137 }138 139 ret = sharp_nt_panel_on(sharp_nt);140 if (ret < 0) {141 dev_err(panel->dev, "failed to set panel on: %d\n", ret);142 goto poweroff;143 }144 145 return 0;146 147poweroff:148 regulator_disable(sharp_nt->supply);149 if (sharp_nt->reset_gpio)150 gpiod_set_value(sharp_nt->reset_gpio, 0);151 return ret;152}153 154static const struct drm_display_mode default_mode = {155 .clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000,156 .hdisplay = 540,157 .hsync_start = 540 + 48,158 .hsync_end = 540 + 48 + 32,159 .htotal = 540 + 48 + 32 + 80,160 .vdisplay = 960,161 .vsync_start = 960 + 3,162 .vsync_end = 960 + 3 + 10,163 .vtotal = 960 + 3 + 10 + 15,164};165 166static int sharp_nt_panel_get_modes(struct drm_panel *panel,167 struct drm_connector *connector)168{169 struct drm_display_mode *mode;170 171 mode = drm_mode_duplicate(connector->dev, &default_mode);172 if (!mode) {173 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",174 default_mode.hdisplay, default_mode.vdisplay,175 drm_mode_vrefresh(&default_mode));176 return -ENOMEM;177 }178 179 drm_mode_set_name(mode);180 181 drm_mode_probed_add(connector, mode);182 183 connector->display_info.width_mm = 54;184 connector->display_info.height_mm = 95;185 186 return 1;187}188 189static const struct drm_panel_funcs sharp_nt_panel_funcs = {190 .unprepare = sharp_nt_panel_unprepare,191 .prepare = sharp_nt_panel_prepare,192 .get_modes = sharp_nt_panel_get_modes,193};194 195static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)196{197 struct device *dev = &sharp_nt->dsi->dev;198 int ret;199 200 sharp_nt->supply = devm_regulator_get(dev, "avdd");201 if (IS_ERR(sharp_nt->supply))202 return PTR_ERR(sharp_nt->supply);203 204 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);205 if (IS_ERR(sharp_nt->reset_gpio)) {206 dev_err(dev, "cannot get reset-gpios %ld\n",207 PTR_ERR(sharp_nt->reset_gpio));208 sharp_nt->reset_gpio = NULL;209 } else {210 gpiod_set_value(sharp_nt->reset_gpio, 0);211 }212 213 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,214 &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);215 216 ret = drm_panel_of_backlight(&sharp_nt->base);217 if (ret)218 return ret;219 220 drm_panel_add(&sharp_nt->base);221 222 return 0;223}224 225static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)226{227 if (sharp_nt->base.dev)228 drm_panel_remove(&sharp_nt->base);229}230 231static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)232{233 struct sharp_nt_panel *sharp_nt;234 int ret;235 236 dsi->lanes = 2;237 dsi->format = MIPI_DSI_FMT_RGB888;238 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |239 MIPI_DSI_MODE_VIDEO_SYNC_PULSE |240 MIPI_DSI_MODE_VIDEO_HSE |241 MIPI_DSI_CLOCK_NON_CONTINUOUS |242 MIPI_DSI_MODE_NO_EOT_PACKET;243 244 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);245 if (!sharp_nt)246 return -ENOMEM;247 248 mipi_dsi_set_drvdata(dsi, sharp_nt);249 250 sharp_nt->dsi = dsi;251 252 ret = sharp_nt_panel_add(sharp_nt);253 if (ret < 0)254 return ret;255 256 ret = mipi_dsi_attach(dsi);257 if (ret < 0) {258 sharp_nt_panel_del(sharp_nt);259 return ret;260 }261 262 return 0;263}264 265static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)266{267 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);268 int ret;269 270 ret = mipi_dsi_detach(dsi);271 if (ret < 0)272 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);273 274 sharp_nt_panel_del(sharp_nt);275}276 277static const struct of_device_id sharp_nt_of_match[] = {278 { .compatible = "sharp,ls043t1le01-qhd", },279 { }280};281MODULE_DEVICE_TABLE(of, sharp_nt_of_match);282 283static struct mipi_dsi_driver sharp_nt_panel_driver = {284 .driver = {285 .name = "panel-sharp-ls043t1le01-qhd",286 .of_match_table = sharp_nt_of_match,287 },288 .probe = sharp_nt_panel_probe,289 .remove = sharp_nt_panel_remove,290};291module_mipi_dsi_driver(sharp_nt_panel_driver);292 293MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");294MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");295MODULE_LICENSE("GPL v2");296