drm/panel/panel-ronbo-rb070d30.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Copyright (C) 2018-2019, Bridge Systems BV
0004  * Copyright (C) 2018-2019, Bootlin
0005  * Copyright (C) 2017, Free Electrons
0006  *
0007  * This file based on panel-ilitek-ili9881c.c
0008  */
0009
0010 #include <linux/delay.h>
0011 #include <linux/device.h>
0012 #include <linux/err.h>
0013 #include <linux/errno.h>
0014 #include <linux/fb.h>
0015 #include <linux/kernel.h>
0016 #include <linux/media-bus-format.h>
0017 #include <linux/module.h>
0018
0019 #include <linux/gpio/consumer.h>
0020 #include <linux/regulator/consumer.h>
0021
0022 #include <drm/drm_connector.h>
0023 #include <drm/drm_mipi_dsi.h>
0024 #include <drm/drm_modes.h>
0025 #include <drm/drm_panel.h>
0026
0027 struct rb070d30_panel {
0028     struct drm_panel panel;
0029     struct mipi_dsi_device *dsi;
0030     struct regulator *supply;
0031
0032     struct {
0033         struct gpio_desc *power;
0034         struct gpio_desc *reset;
0035         struct gpio_desc *updn;
0036         struct gpio_desc *shlr;
0037     } gpios;
0038 };
0039
0040 static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
0041 {
0042     return container_of(panel, struct rb070d30_panel, panel);
0043 }
0044
0045 static int rb070d30_panel_prepare(struct drm_panel *panel)
0046 {
0047     struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
0048     int ret;
0049
0050     ret = regulator_enable(ctx->supply);
0051     if (ret < 0) {
0052         dev_err(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
0053         return ret;
0054     }
0055
0056     msleep(20);
0057     gpiod_set_value(ctx->gpios.power, 1);
0058     msleep(20);
0059     gpiod_set_value(ctx->gpios.reset, 1);
0060     msleep(20);
0061     return 0;
0062 }
0063
0064 static int rb070d30_panel_unprepare(struct drm_panel *panel)
0065 {
0066     struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
0067
0068     gpiod_set_value(ctx->gpios.reset, 0);
0069     gpiod_set_value(ctx->gpios.power, 0);
0070     regulator_disable(ctx->supply);
0071
0072     return 0;
0073 }
0074
0075 static int rb070d30_panel_enable(struct drm_panel *panel)
0076 {
0077     struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
0078
0079     return mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
0080 }
0081
0082 static int rb070d30_panel_disable(struct drm_panel *panel)
0083 {
0084     struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
0085
0086     return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
0087 }
0088
0089 /* Default timings */
0090 static const struct drm_display_mode default_mode = {
0091     .clock      = 51206,
0092     .hdisplay   = 1024,
0093     .hsync_start    = 1024 + 160,
0094     .hsync_end  = 1024 + 160 + 80,
0095     .htotal     = 1024 + 160 + 80 + 80,
0096     .vdisplay   = 600,
0097     .vsync_start    = 600 + 12,
0098     .vsync_end  = 600 + 12 + 10,
0099     .vtotal     = 600 + 12 + 10 + 13,
0100
0101     .width_mm   = 154,
0102     .height_mm  = 85,
0103 };
0104
0105 static int rb070d30_panel_get_modes(struct drm_panel *panel,
0106                     struct drm_connector *connector)
0107 {
0108     struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
0109     struct drm_display_mode *mode;
0110     static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
0111
0112     mode = drm_mode_duplicate(connector->dev, &default_mode);
0113     if (!mode) {
0114         dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n",
0115             DRM_MODE_ARG(&default_mode));
0116         return -EINVAL;
0117     }
0118
0119     drm_mode_set_name(mode);
0120
0121     mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
0122     drm_mode_probed_add(connector, mode);
0123
0124     connector->display_info.bpc = 8;
0125     connector->display_info.width_mm = mode->width_mm;
0126     connector->display_info.height_mm = mode->height_mm;
0127     drm_display_info_set_bus_formats(&connector->display_info,
0128                      &bus_format, 1);
0129
0130     return 1;
0131 }
0132
0133 static const struct drm_panel_funcs rb070d30_panel_funcs = {
0134     .get_modes  = rb070d30_panel_get_modes,
0135     .prepare    = rb070d30_panel_prepare,
0136     .enable     = rb070d30_panel_enable,
0137     .disable    = rb070d30_panel_disable,
0138     .unprepare  = rb070d30_panel_unprepare,
0139 };
0140
0141 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
0142 {
0143     struct rb070d30_panel *ctx;
0144     int ret;
0145
0146     ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
0147     if (!ctx)
0148         return -ENOMEM;
0149
0150     ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
0151     if (IS_ERR(ctx->supply))
0152         return PTR_ERR(ctx->supply);
0153
0154     mipi_dsi_set_drvdata(dsi, ctx);
0155     ctx->dsi = dsi;
0156
0157     drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,
0158                DRM_MODE_CONNECTOR_DSI);
0159
0160     ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
0161     if (IS_ERR(ctx->gpios.reset)) {
0162         dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
0163         return PTR_ERR(ctx->gpios.reset);
0164     }
0165
0166     ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
0167     if (IS_ERR(ctx->gpios.power)) {
0168         dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
0169         return PTR_ERR(ctx->gpios.power);
0170     }
0171
0172     /*
0173      * We don't change the state of that GPIO later on but we need
0174      * to force it into a low state.
0175      */
0176     ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
0177     if (IS_ERR(ctx->gpios.updn)) {
0178         dev_err(&dsi->dev, "Couldn't get our updn GPIO\n");
0179         return PTR_ERR(ctx->gpios.updn);
0180     }
0181
0182     /*
0183      * We don't change the state of that GPIO later on but we need
0184      * to force it into a low state.
0185      */
0186     ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
0187     if (IS_ERR(ctx->gpios.shlr)) {
0188         dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n");
0189         return PTR_ERR(ctx->gpios.shlr);
0190     }
0191
0192     ret = drm_panel_of_backlight(&ctx->panel);
0193     if (ret)
0194         return ret;
0195
0196     drm_panel_add(&ctx->panel);
0197
0198     dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
0199     dsi->format = MIPI_DSI_FMT_RGB888;
0200     dsi->lanes = 4;
0201
0202     ret = mipi_dsi_attach(dsi);
0203     if (ret < 0) {
0204         drm_panel_remove(&ctx->panel);
0205         return ret;
0206     }
0207
0208     return 0;
0209 }
0210
0211 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
0212 {
0213     struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
0214
0215     mipi_dsi_detach(dsi);
0216     drm_panel_remove(&ctx->panel);
0217
0218     return 0;
0219 }
0220
0221 static const struct of_device_id rb070d30_panel_of_match[] = {
0222     { .compatible = "ronbo,rb070d30" },
0223     { /* sentinel */ },
0224 };
0225 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
0226
0227 static struct mipi_dsi_driver rb070d30_panel_driver = {
0228     .probe = rb070d30_panel_dsi_probe,
0229     .remove = rb070d30_panel_dsi_remove,
0230     .driver = {
0231         .name = "panel-ronbo-rb070d30",
0232         .of_match_table = rb070d30_panel_of_match,
0233     },
0234 };
0235 module_mipi_dsi_driver(rb070d30_panel_driver);
0236
0237 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
0238 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
0239 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
0240 MODULE_LICENSE("GPL");