239 lines · c
1// SPDX-License-Identifier: GPL-2.0+2/*3 * Copyright (C) 2018-2019, Bridge Systems BV4 * Copyright (C) 2018-2019, Bootlin5 * Copyright (C) 2017, Free Electrons6 *7 * This file based on panel-ilitek-ili9881c.c8 */9 10#include <linux/delay.h>11#include <linux/device.h>12#include <linux/err.h>13#include <linux/errno.h>14#include <linux/kernel.h>15#include <linux/media-bus-format.h>16#include <linux/module.h>17#include <linux/of.h>18 19#include <linux/gpio/consumer.h>20#include <linux/regulator/consumer.h>21 22#include <drm/drm_connector.h>23#include <drm/drm_mipi_dsi.h>24#include <drm/drm_modes.h>25#include <drm/drm_panel.h>26 27struct rb070d30_panel {28 struct drm_panel panel;29 struct mipi_dsi_device *dsi;30 struct regulator *supply;31 32 struct {33 struct gpio_desc *power;34 struct gpio_desc *reset;35 struct gpio_desc *updn;36 struct gpio_desc *shlr;37 } gpios;38};39 40static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)41{42 return container_of(panel, struct rb070d30_panel, panel);43}44 45static int rb070d30_panel_prepare(struct drm_panel *panel)46{47 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);48 int ret;49 50 ret = regulator_enable(ctx->supply);51 if (ret < 0) {52 dev_err(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);53 return ret;54 }55 56 msleep(20);57 gpiod_set_value(ctx->gpios.power, 1);58 msleep(20);59 gpiod_set_value(ctx->gpios.reset, 1);60 msleep(20);61 return 0;62}63 64static int rb070d30_panel_unprepare(struct drm_panel *panel)65{66 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);67 68 gpiod_set_value(ctx->gpios.reset, 0);69 gpiod_set_value(ctx->gpios.power, 0);70 regulator_disable(ctx->supply);71 72 return 0;73}74 75static int rb070d30_panel_enable(struct drm_panel *panel)76{77 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);78 79 return mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);80}81 82static int rb070d30_panel_disable(struct drm_panel *panel)83{84 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);85 86 return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);87}88 89/* Default timings */90static const struct drm_display_mode default_mode = {91 .clock = 51206,92 .hdisplay = 1024,93 .hsync_start = 1024 + 160,94 .hsync_end = 1024 + 160 + 80,95 .htotal = 1024 + 160 + 80 + 80,96 .vdisplay = 600,97 .vsync_start = 600 + 12,98 .vsync_end = 600 + 12 + 10,99 .vtotal = 600 + 12 + 10 + 13,100 101 .width_mm = 154,102 .height_mm = 85,103};104 105static int rb070d30_panel_get_modes(struct drm_panel *panel,106 struct drm_connector *connector)107{108 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);109 struct drm_display_mode *mode;110 static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;111 112 mode = drm_mode_duplicate(connector->dev, &default_mode);113 if (!mode) {114 dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n",115 DRM_MODE_ARG(&default_mode));116 return -EINVAL;117 }118 119 drm_mode_set_name(mode);120 121 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;122 drm_mode_probed_add(connector, mode);123 124 connector->display_info.bpc = 8;125 connector->display_info.width_mm = mode->width_mm;126 connector->display_info.height_mm = mode->height_mm;127 drm_display_info_set_bus_formats(&connector->display_info,128 &bus_format, 1);129 130 return 1;131}132 133static const struct drm_panel_funcs rb070d30_panel_funcs = {134 .get_modes = rb070d30_panel_get_modes,135 .prepare = rb070d30_panel_prepare,136 .enable = rb070d30_panel_enable,137 .disable = rb070d30_panel_disable,138 .unprepare = rb070d30_panel_unprepare,139};140 141static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)142{143 struct rb070d30_panel *ctx;144 int ret;145 146 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);147 if (!ctx)148 return -ENOMEM;149 150 ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");151 if (IS_ERR(ctx->supply))152 return PTR_ERR(ctx->supply);153 154 mipi_dsi_set_drvdata(dsi, ctx);155 ctx->dsi = dsi;156 157 drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,158 DRM_MODE_CONNECTOR_DSI);159 160 ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);161 if (IS_ERR(ctx->gpios.reset)) {162 dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");163 return PTR_ERR(ctx->gpios.reset);164 }165 166 ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);167 if (IS_ERR(ctx->gpios.power)) {168 dev_err(&dsi->dev, "Couldn't get our power GPIO\n");169 return PTR_ERR(ctx->gpios.power);170 }171 172 /*173 * We don't change the state of that GPIO later on but we need174 * to force it into a low state.175 */176 ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);177 if (IS_ERR(ctx->gpios.updn)) {178 dev_err(&dsi->dev, "Couldn't get our updn GPIO\n");179 return PTR_ERR(ctx->gpios.updn);180 }181 182 /*183 * We don't change the state of that GPIO later on but we need184 * to force it into a low state.185 */186 ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);187 if (IS_ERR(ctx->gpios.shlr)) {188 dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n");189 return PTR_ERR(ctx->gpios.shlr);190 }191 192 ret = drm_panel_of_backlight(&ctx->panel);193 if (ret)194 return ret;195 196 drm_panel_add(&ctx->panel);197 198 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;199 dsi->format = MIPI_DSI_FMT_RGB888;200 dsi->lanes = 4;201 202 ret = mipi_dsi_attach(dsi);203 if (ret < 0) {204 drm_panel_remove(&ctx->panel);205 return ret;206 }207 208 return 0;209}210 211static void rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)212{213 struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);214 215 mipi_dsi_detach(dsi);216 drm_panel_remove(&ctx->panel);217}218 219static const struct of_device_id rb070d30_panel_of_match[] = {220 { .compatible = "ronbo,rb070d30" },221 { /* sentinel */ },222};223MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);224 225static struct mipi_dsi_driver rb070d30_panel_driver = {226 .probe = rb070d30_panel_dsi_probe,227 .remove = rb070d30_panel_dsi_remove,228 .driver = {229 .name = "panel-ronbo-rb070d30",230 .of_match_table = rb070d30_panel_of_match,231 },232};233module_mipi_dsi_driver(rb070d30_panel_driver);234 235MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");236MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");237MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");238MODULE_LICENSE("GPL");239