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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2019, The Linux Foundation. All rights reserved.4 */5 6#include <linux/delay.h>7#include <linux/module.h>8#include <linux/mod_devicetable.h>9#include <linux/gpio/consumer.h>10#include <linux/regulator/consumer.h>11 12#include <video/mipi_display.h>13 14#include <drm/drm_mipi_dsi.h>15#include <drm/drm_modes.h>16#include <drm/drm_panel.h>17 18struct visionox_rm69299 {19 struct drm_panel panel;20 struct regulator_bulk_data supplies[2];21 struct gpio_desc *reset_gpio;22 struct mipi_dsi_device *dsi;23};24 25static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)26{27 return container_of(panel, struct visionox_rm69299, panel);28}29 30static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)31{32 int ret;33 34 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);35 if (ret < 0)36 return ret;37 38 /*39 * Reset sequence of visionox panel requires the panel to be40 * out of reset for 10ms, followed by being held in reset41 * for 10ms and then out again42 */43 gpiod_set_value(ctx->reset_gpio, 1);44 usleep_range(10000, 20000);45 gpiod_set_value(ctx->reset_gpio, 0);46 usleep_range(10000, 20000);47 gpiod_set_value(ctx->reset_gpio, 1);48 usleep_range(10000, 20000);49 50 return 0;51}52 53static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)54{55 gpiod_set_value(ctx->reset_gpio, 0);56 57 return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);58}59 60static int visionox_rm69299_unprepare(struct drm_panel *panel)61{62 struct visionox_rm69299 *ctx = panel_to_ctx(panel);63 int ret;64 65 ctx->dsi->mode_flags = 0;66 67 ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);68 if (ret < 0)69 dev_err(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);70 71 /* 120ms delay required here as per DCS spec */72 msleep(120);73 74 ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);75 if (ret < 0) {76 dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);77 }78 79 ret = visionox_rm69299_power_off(ctx);80 81 return ret;82}83 84static int visionox_rm69299_prepare(struct drm_panel *panel)85{86 struct visionox_rm69299 *ctx = panel_to_ctx(panel);87 int ret;88 89 ret = visionox_rm69299_power_on(ctx);90 if (ret < 0)91 return ret;92 93 ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;94 95 ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);96 if (ret < 0) {97 dev_err(ctx->panel.dev, "cmd set tx 0 failed, ret = %d\n", ret);98 goto power_off;99 }100 101 ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);102 if (ret < 0) {103 dev_err(ctx->panel.dev, "cmd set tx 1 failed, ret = %d\n", ret);104 goto power_off;105 }106 107 ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);108 if (ret < 0) {109 dev_err(ctx->panel.dev, "cmd set tx 2 failed, ret = %d\n", ret);110 goto power_off;111 }112 113 ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);114 if (ret < 0) {115 dev_err(ctx->panel.dev, "cmd set tx 3 failed, ret = %d\n", ret);116 goto power_off;117 }118 119 ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);120 if (ret < 0) {121 dev_err(ctx->panel.dev, "exit_sleep_mode cmd failed ret = %d\n", ret);122 goto power_off;123 }124 125 /* Per DSI spec wait 120ms after sending exit sleep DCS command */126 msleep(120);127 128 ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);129 if (ret < 0) {130 dev_err(ctx->panel.dev, "set_display_on cmd failed ret = %d\n", ret);131 goto power_off;132 }133 134 /* Per DSI spec wait 120ms after sending set_display_on DCS command */135 msleep(120);136 137 return 0;138 139power_off:140 return ret;141}142 143static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {144 .name = "1080x2248",145 .clock = 158695,146 .hdisplay = 1080,147 .hsync_start = 1080 + 26,148 .hsync_end = 1080 + 26 + 2,149 .htotal = 1080 + 26 + 2 + 36,150 .vdisplay = 2248,151 .vsync_start = 2248 + 56,152 .vsync_end = 2248 + 56 + 4,153 .vtotal = 2248 + 56 + 4 + 4,154 .flags = 0,155};156 157static int visionox_rm69299_get_modes(struct drm_panel *panel,158 struct drm_connector *connector)159{160 struct visionox_rm69299 *ctx = panel_to_ctx(panel);161 struct drm_display_mode *mode;162 163 mode = drm_mode_duplicate(connector->dev,164 &visionox_rm69299_1080x2248_60hz);165 if (!mode) {166 dev_err(ctx->panel.dev, "failed to create a new display mode\n");167 return 0;168 }169 170 connector->display_info.width_mm = 74;171 connector->display_info.height_mm = 131;172 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;173 drm_mode_probed_add(connector, mode);174 175 return 1;176}177 178static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {179 .unprepare = visionox_rm69299_unprepare,180 .prepare = visionox_rm69299_prepare,181 .get_modes = visionox_rm69299_get_modes,182};183 184static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)185{186 struct device *dev = &dsi->dev;187 struct visionox_rm69299 *ctx;188 int ret;189 190 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);191 if (!ctx)192 return -ENOMEM;193 194 mipi_dsi_set_drvdata(dsi, ctx);195 196 ctx->panel.dev = dev;197 ctx->dsi = dsi;198 199 ctx->supplies[0].supply = "vdda";200 ctx->supplies[0].init_load_uA = 32000;201 ctx->supplies[1].supply = "vdd3p3";202 ctx->supplies[1].init_load_uA = 13200;203 204 ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),205 ctx->supplies);206 if (ret < 0)207 return ret;208 209 ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,210 "reset", GPIOD_OUT_LOW);211 if (IS_ERR(ctx->reset_gpio)) {212 dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));213 return PTR_ERR(ctx->reset_gpio);214 }215 216 drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,217 DRM_MODE_CONNECTOR_DSI);218 ctx->panel.dev = dev;219 ctx->panel.funcs = &visionox_rm69299_drm_funcs;220 drm_panel_add(&ctx->panel);221 222 dsi->lanes = 4;223 dsi->format = MIPI_DSI_FMT_RGB888;224 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |225 MIPI_DSI_CLOCK_NON_CONTINUOUS;226 ret = mipi_dsi_attach(dsi);227 if (ret < 0) {228 dev_err(dev, "dsi attach failed ret = %d\n", ret);229 goto err_dsi_attach;230 }231 232 return 0;233 234err_dsi_attach:235 drm_panel_remove(&ctx->panel);236 return ret;237}238 239static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)240{241 struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);242 243 mipi_dsi_detach(ctx->dsi);244 drm_panel_remove(&ctx->panel);245}246 247static const struct of_device_id visionox_rm69299_of_match[] = {248 { .compatible = "visionox,rm69299-1080p-display", },249 { /* sentinel */ }250};251MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);252 253static struct mipi_dsi_driver visionox_rm69299_driver = {254 .driver = {255 .name = "panel-visionox-rm69299",256 .of_match_table = visionox_rm69299_of_match,257 },258 .probe = visionox_rm69299_probe,259 .remove = visionox_rm69299_remove,260};261module_mipi_dsi_driver(visionox_rm69299_driver);262 263MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");264MODULE_LICENSE("GPL v2");265