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1// SPDX-License-Identifier: GPL-2.02/*3 * Elida kd35t133 3.5" MIPI-DSI panel driver4 * Copyright (C) 2020 Theobroma Systems Design und Consulting GmbH5 *6 * based on7 *8 * Rockteck jh057n00900 5.5" MIPI-DSI panel driver9 * Copyright (C) Purism SPC 201910 */11 12#include <linux/delay.h>13#include <linux/gpio/consumer.h>14#include <linux/media-bus-format.h>15#include <linux/module.h>16#include <linux/of.h>17#include <linux/regulator/consumer.h>18 19#include <video/display_timing.h>20#include <video/mipi_display.h>21 22#include <drm/drm_mipi_dsi.h>23#include <drm/drm_modes.h>24#include <drm/drm_panel.h>25 26/* Manufacturer specific Commands send via DSI */27#define KD35T133_CMD_INTERFACEMODECTRL 0xb028#define KD35T133_CMD_FRAMERATECTRL 0xb129#define KD35T133_CMD_DISPLAYINVERSIONCTRL 0xb430#define KD35T133_CMD_DISPLAYFUNCTIONCTRL 0xb631#define KD35T133_CMD_POWERCONTROL1 0xc032#define KD35T133_CMD_POWERCONTROL2 0xc133#define KD35T133_CMD_VCOMCONTROL 0xc534#define KD35T133_CMD_POSITIVEGAMMA 0xe035#define KD35T133_CMD_NEGATIVEGAMMA 0xe136#define KD35T133_CMD_SETIMAGEFUNCTION 0xe937#define KD35T133_CMD_ADJUSTCONTROL3 0xf738 39struct kd35t133 {40 struct device *dev;41 struct drm_panel panel;42 struct gpio_desc *reset_gpio;43 struct regulator *vdd;44 struct regulator *iovcc;45 enum drm_panel_orientation orientation;46};47 48static inline struct kd35t133 *panel_to_kd35t133(struct drm_panel *panel)49{50 return container_of(panel, struct kd35t133, panel);51}52 53static int kd35t133_init_sequence(struct kd35t133 *ctx)54{55 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);56 struct device *dev = ctx->dev;57 58 /*59 * Init sequence was supplied by the panel vendor with minimal60 * documentation.61 */62 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_POSITIVEGAMMA,63 0x00, 0x13, 0x18, 0x04, 0x0f, 0x06, 0x3a, 0x56,64 0x4d, 0x03, 0x0a, 0x06, 0x30, 0x3e, 0x0f);65 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_NEGATIVEGAMMA,66 0x00, 0x13, 0x18, 0x01, 0x11, 0x06, 0x38, 0x34,67 0x4d, 0x06, 0x0d, 0x0b, 0x31, 0x37, 0x0f);68 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_POWERCONTROL1, 0x18, 0x17);69 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_POWERCONTROL2, 0x41);70 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_VCOMCONTROL, 0x00, 0x1a, 0x80);71 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x48);72 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);73 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_INTERFACEMODECTRL, 0x00);74 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_FRAMERATECTRL, 0xa0);75 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_DISPLAYINVERSIONCTRL, 0x02);76 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_DISPLAYFUNCTIONCTRL,77 0x20, 0x02);78 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_SETIMAGEFUNCTION, 0x00);79 mipi_dsi_dcs_write_seq(dsi, KD35T133_CMD_ADJUSTCONTROL3,80 0xa9, 0x51, 0x2c, 0x82);81 mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_INVERT_MODE, NULL, 0);82 83 dev_dbg(dev, "Panel init sequence done\n");84 return 0;85}86 87static int kd35t133_unprepare(struct drm_panel *panel)88{89 struct kd35t133 *ctx = panel_to_kd35t133(panel);90 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);91 int ret;92 93 ret = mipi_dsi_dcs_set_display_off(dsi);94 if (ret < 0)95 dev_err(ctx->dev, "failed to set display off: %d\n", ret);96 97 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);98 if (ret < 0) {99 dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret);100 return ret;101 }102 103 gpiod_set_value_cansleep(ctx->reset_gpio, 1);104 105 regulator_disable(ctx->iovcc);106 regulator_disable(ctx->vdd);107 108 return 0;109}110 111static int kd35t133_prepare(struct drm_panel *panel)112{113 struct kd35t133 *ctx = panel_to_kd35t133(panel);114 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);115 int ret;116 117 dev_dbg(ctx->dev, "Resetting the panel\n");118 ret = regulator_enable(ctx->vdd);119 if (ret < 0) {120 dev_err(ctx->dev, "Failed to enable vdd supply: %d\n", ret);121 return ret;122 }123 124 ret = regulator_enable(ctx->iovcc);125 if (ret < 0) {126 dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);127 goto disable_vdd;128 }129 130 msleep(20);131 132 gpiod_set_value_cansleep(ctx->reset_gpio, 1);133 usleep_range(10, 20);134 gpiod_set_value_cansleep(ctx->reset_gpio, 0);135 136 msleep(20);137 138 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);139 if (ret < 0) {140 dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);141 goto disable_iovcc;142 }143 144 msleep(250);145 146 ret = kd35t133_init_sequence(ctx);147 if (ret < 0) {148 dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);149 goto disable_iovcc;150 }151 152 ret = mipi_dsi_dcs_set_display_on(dsi);153 if (ret < 0) {154 dev_err(ctx->dev, "Failed to set display on: %d\n", ret);155 goto disable_iovcc;156 }157 158 msleep(50);159 160 return 0;161 162disable_iovcc:163 regulator_disable(ctx->iovcc);164disable_vdd:165 regulator_disable(ctx->vdd);166 return ret;167}168 169static const struct drm_display_mode default_mode = {170 .hdisplay = 320,171 .hsync_start = 320 + 130,172 .hsync_end = 320 + 130 + 4,173 .htotal = 320 + 130 + 4 + 130,174 .vdisplay = 480,175 .vsync_start = 480 + 2,176 .vsync_end = 480 + 2 + 1,177 .vtotal = 480 + 2 + 1 + 2,178 .clock = 17000,179 .width_mm = 42,180 .height_mm = 82,181};182 183static int kd35t133_get_modes(struct drm_panel *panel,184 struct drm_connector *connector)185{186 struct kd35t133 *ctx = panel_to_kd35t133(panel);187 struct drm_display_mode *mode;188 189 mode = drm_mode_duplicate(connector->dev, &default_mode);190 if (!mode) {191 dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",192 default_mode.hdisplay, default_mode.vdisplay,193 drm_mode_vrefresh(&default_mode));194 return -ENOMEM;195 }196 197 drm_mode_set_name(mode);198 199 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;200 connector->display_info.width_mm = mode->width_mm;201 connector->display_info.height_mm = mode->height_mm;202 drm_mode_probed_add(connector, mode);203 204 return 1;205}206 207static enum drm_panel_orientation kd35t133_get_orientation(struct drm_panel *panel)208{209 struct kd35t133 *ctx = panel_to_kd35t133(panel);210 211 return ctx->orientation;212}213 214static const struct drm_panel_funcs kd35t133_funcs = {215 .unprepare = kd35t133_unprepare,216 .prepare = kd35t133_prepare,217 .get_modes = kd35t133_get_modes,218 .get_orientation = kd35t133_get_orientation,219};220 221static int kd35t133_probe(struct mipi_dsi_device *dsi)222{223 struct device *dev = &dsi->dev;224 struct kd35t133 *ctx;225 int ret;226 227 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);228 if (!ctx)229 return -ENOMEM;230 231 ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);232 if (IS_ERR(ctx->reset_gpio)) {233 dev_err(dev, "cannot get reset gpio\n");234 return PTR_ERR(ctx->reset_gpio);235 }236 237 ctx->vdd = devm_regulator_get(dev, "vdd");238 if (IS_ERR(ctx->vdd)) {239 ret = PTR_ERR(ctx->vdd);240 if (ret != -EPROBE_DEFER)241 dev_err(dev, "Failed to request vdd regulator: %d\n", ret);242 return ret;243 }244 245 ctx->iovcc = devm_regulator_get(dev, "iovcc");246 if (IS_ERR(ctx->iovcc)) {247 ret = PTR_ERR(ctx->iovcc);248 if (ret != -EPROBE_DEFER)249 dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);250 return ret;251 }252 253 ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);254 if (ret < 0) {255 dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);256 return ret;257 }258 259 mipi_dsi_set_drvdata(dsi, ctx);260 261 ctx->dev = dev;262 263 dsi->lanes = 1;264 dsi->format = MIPI_DSI_FMT_RGB888;265 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |266 MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET |267 MIPI_DSI_CLOCK_NON_CONTINUOUS;268 269 drm_panel_init(&ctx->panel, &dsi->dev, &kd35t133_funcs,270 DRM_MODE_CONNECTOR_DSI);271 272 ret = drm_panel_of_backlight(&ctx->panel);273 if (ret)274 return ret;275 276 drm_panel_add(&ctx->panel);277 278 ret = mipi_dsi_attach(dsi);279 if (ret < 0) {280 dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);281 drm_panel_remove(&ctx->panel);282 return ret;283 }284 285 return 0;286}287 288static void kd35t133_remove(struct mipi_dsi_device *dsi)289{290 struct kd35t133 *ctx = mipi_dsi_get_drvdata(dsi);291 int ret;292 293 ret = mipi_dsi_detach(dsi);294 if (ret < 0)295 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);296 297 drm_panel_remove(&ctx->panel);298}299 300static const struct of_device_id kd35t133_of_match[] = {301 { .compatible = "elida,kd35t133" },302 { /* sentinel */ }303};304MODULE_DEVICE_TABLE(of, kd35t133_of_match);305 306static struct mipi_dsi_driver kd35t133_driver = {307 .driver = {308 .name = "panel-elida-kd35t133",309 .of_match_table = kd35t133_of_match,310 },311 .probe = kd35t133_probe,312 .remove = kd35t133_remove,313};314module_mipi_dsi_driver(kd35t133_driver);315 316MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");317MODULE_DESCRIPTION("DRM driver for Elida kd35t133 MIPI DSI panel");318MODULE_LICENSE("GPL v2");319