drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (C) 2019, Michael Srba
   3
   4 #include <linux/delay.h>
   5 #include <linux/gpio/consumer.h>
   6 #include <linux/module.h>
   7 #include <linux/of.h>
   8 #include <linux/regulator/consumer.h>
   9
  10 #include <video/mipi_display.h>
  11
  12 #include <drm/drm_mipi_dsi.h>
  13 #include <drm/drm_modes.h>
  14 #include <drm/drm_panel.h>
  15
  16 struct s6e88a0_ams452ef01 {
  17         struct drm_panel panel;
  18         struct mipi_dsi_device *dsi;
  19         struct regulator_bulk_data supplies[2];
  20         struct gpio_desc *reset_gpio;
  21
  22         bool prepared;
  23 };
  24
  25 static inline struct
  26 s6e88a0_ams452ef01 *to_s6e88a0_ams452ef01(struct drm_panel *panel)
  27 {
  28         return container_of(panel, struct s6e88a0_ams452ef01, panel);
  29 }
  30
  31 #define dsi_dcs_write_seq(dsi, seq...) do {                             \
  32                 static const u8 d[] = { seq };                          \
  33                 int ret;                                                \
  34                 ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
  35                 if (ret < 0)                                            \
  36                         return ret;                                     \
  37         } while (0)
  38
  39 static void s6e88a0_ams452ef01_reset(struct s6e88a0_ams452ef01 *ctx)
  40 {
  41         gpiod_set_value_cansleep(ctx->reset_gpio, 1);
  42         usleep_range(5000, 6000);
  43         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  44         usleep_range(1000, 2000);
  45         gpiod_set_value_cansleep(ctx->reset_gpio, 1);
  46         usleep_range(10000, 11000);
  47 }
  48
  49 static int s6e88a0_ams452ef01_on(struct s6e88a0_ams452ef01 *ctx)
  50 {
  51         struct mipi_dsi_device *dsi = ctx->dsi;
  52         struct device *dev = &dsi->dev;
  53         int ret;
  54
  55         dsi->mode_flags |= MIPI_DSI_MODE_LPM;
  56
  57         dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a); // enable LEVEL2 commands
  58         dsi_dcs_write_seq(dsi, 0xcc, 0x4c); // set Pixel Clock Divider polarity
  59
  60         ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
  61         if (ret < 0) {
  62                 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
  63                 return ret;
  64         }
  65         msleep(120);
  66
  67         // set default brightness/gama
  68         dsi_dcs_write_seq(dsi, 0xca,
  69                           0x01, 0x00, 0x01, 0x00, 0x01, 0x00,   // V255 RR,GG,BB
  70                           0x80, 0x80, 0x80,                     // V203 R,G,B
  71                           0x80, 0x80, 0x80,                     // V151 R,G,B
  72                           0x80, 0x80, 0x80,                     // V87  R,G,B
  73                           0x80, 0x80, 0x80,                     // V51  R,G,B
  74                           0x80, 0x80, 0x80,                     // V35  R,G,B
  75                           0x80, 0x80, 0x80,                     // V23  R,G,B
  76                           0x80, 0x80, 0x80,                     // V11  R,G,B
  77                           0x6b, 0x68, 0x71,                     // V3   R,G,B
  78                           0x00, 0x00, 0x00);                    // V1   R,G,B
  79         // set default Amoled Off Ratio
  80         dsi_dcs_write_seq(dsi, 0xb2, 0x40, 0x0a, 0x17, 0x00, 0x0a);
  81         dsi_dcs_write_seq(dsi, 0xb6, 0x2c, 0x0b); // set default elvss voltage
  82         dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
  83         dsi_dcs_write_seq(dsi, 0xf7, 0x03); // gamma/aor update
  84         dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5); // disable LEVEL2 commands
  85
  86         ret = mipi_dsi_dcs_set_display_on(dsi);
  87         if (ret < 0) {
  88                 dev_err(dev, "Failed to set display on: %d\n", ret);
  89                 return ret;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int s6e88a0_ams452ef01_off(struct s6e88a0_ams452ef01 *ctx)
  96 {
  97         struct mipi_dsi_device *dsi = ctx->dsi;
  98         struct device *dev = &dsi->dev;
  99         int ret;
 100
 101         dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 102
 103         ret = mipi_dsi_dcs_set_display_off(dsi);
 104         if (ret < 0) {
 105                 dev_err(dev, "Failed to set display off: %d\n", ret);
 106                 return ret;
 107         }
 108         msleep(35);
 109
 110         ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 111         if (ret < 0) {
 112                 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
 113                 return ret;
 114         }
 115         msleep(120);
 116
 117         return 0;
 118 }
 119
 120 static int s6e88a0_ams452ef01_prepare(struct drm_panel *panel)
 121 {
 122         struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
 123         struct device *dev = &ctx->dsi->dev;
 124         int ret;
 125
 126         if (ctx->prepared)
 127                 return 0;
 128
 129         ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 130         if (ret < 0) {
 131                 dev_err(dev, "Failed to enable regulators: %d\n", ret);
 132                 return ret;
 133         }
 134
 135         s6e88a0_ams452ef01_reset(ctx);
 136
 137         ret = s6e88a0_ams452ef01_on(ctx);
 138         if (ret < 0) {
 139                 dev_err(dev, "Failed to initialize panel: %d\n", ret);
 140                 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
 141                 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
 142                                        ctx->supplies);
 143                 return ret;
 144         }
 145
 146         ctx->prepared = true;
 147         return 0;
 148 }
 149
 150 static int s6e88a0_ams452ef01_unprepare(struct drm_panel *panel)
 151 {
 152         struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
 153         struct device *dev = &ctx->dsi->dev;
 154         int ret;
 155
 156         if (!ctx->prepared)
 157                 return 0;
 158
 159         ret = s6e88a0_ams452ef01_off(ctx);
 160         if (ret < 0)
 161                 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
 162
 163         gpiod_set_value_cansleep(ctx->reset_gpio, 0);
 164         regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 165
 166         ctx->prepared = false;
 167         return 0;
 168 }
 169
 170 static const struct drm_display_mode s6e88a0_ams452ef01_mode = {
 171         .clock = (540 + 88 + 4 + 20) * (960 + 14 + 2 + 8) * 60 / 1000,
 172         .hdisplay = 540,
 173         .hsync_start = 540 + 88,
 174         .hsync_end = 540 + 88 + 4,
 175         .htotal = 540 + 88 + 4 + 20,
 176         .vdisplay = 960,
 177         .vsync_start = 960 + 14,
 178         .vsync_end = 960 + 14 + 2,
 179         .vtotal = 960 + 14 + 2 + 8,
 180         .width_mm = 56,
 181         .height_mm = 100,
 182 };
 183
 184 static int s6e88a0_ams452ef01_get_modes(struct drm_panel *panel,
 185                                         struct drm_connector *connector)
 186 {
 187         struct drm_display_mode *mode;
 188
 189         mode = drm_mode_duplicate(connector->dev, &s6e88a0_ams452ef01_mode);
 190         if (!mode)
 191                 return -ENOMEM;
 192
 193         drm_mode_set_name(mode);
 194
 195         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 196         connector->display_info.width_mm = mode->width_mm;
 197         connector->display_info.height_mm = mode->height_mm;
 198         drm_mode_probed_add(connector, mode);
 199
 200         return 1;
 201 }
 202
 203 static const struct drm_panel_funcs s6e88a0_ams452ef01_panel_funcs = {
 204         .unprepare = s6e88a0_ams452ef01_unprepare,
 205         .prepare = s6e88a0_ams452ef01_prepare,
 206         .get_modes = s6e88a0_ams452ef01_get_modes,
 207 };
 208
 209 static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
 210 {
 211         struct device *dev = &dsi->dev;
 212         struct s6e88a0_ams452ef01 *ctx;
 213         int ret;
 214
 215         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 216         if (!ctx)
 217                 return -ENOMEM;
 218
 219         ctx->supplies[0].supply = "vdd3";
 220         ctx->supplies[1].supply = "vci";
 221         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
 222                                       ctx->supplies);
 223         if (ret < 0) {
 224                 dev_err(dev, "Failed to get regulators: %d\n", ret);
 225                 return ret;
 226         }
 227
 228         ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 229         if (IS_ERR(ctx->reset_gpio)) {
 230                 ret = PTR_ERR(ctx->reset_gpio);
 231                 dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
 232                 return ret;
 233         }
 234
 235         ctx->dsi = dsi;
 236         mipi_dsi_set_drvdata(dsi, ctx);
 237
 238         dsi->lanes = 2;
 239         dsi->format = MIPI_DSI_FMT_RGB888;
 240         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST;
 241
 242         drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs,
 243                        DRM_MODE_CONNECTOR_DSI);
 244
 245         drm_panel_add(&ctx->panel);
 246
 247         ret = mipi_dsi_attach(dsi);
 248         if (ret < 0) {
 249                 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
 250                 return ret;
 251         }
 252
 253         return 0;
 254 }
 255
 256 static int s6e88a0_ams452ef01_remove(struct mipi_dsi_device *dsi)
 257 {
 258         struct s6e88a0_ams452ef01 *ctx = mipi_dsi_get_drvdata(dsi);
 259         int ret;
 260
 261         ret = mipi_dsi_detach(dsi);
 262         if (ret < 0)
 263                 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
 264
 265         drm_panel_remove(&ctx->panel);
 266
 267         return 0;
 268 }
 269
 270 static const struct of_device_id s6e88a0_ams452ef01_of_match[] = {
 271         { .compatible = "samsung,s6e88a0-ams452ef01" },
 272         { /* sentinel */ },
 273 };
 274 MODULE_DEVICE_TABLE(of, s6e88a0_ams452ef01_of_match);
 275
 276 static struct mipi_dsi_driver s6e88a0_ams452ef01_driver = {
 277         .probe = s6e88a0_ams452ef01_probe,
 278         .remove = s6e88a0_ams452ef01_remove,
 279         .driver = {
 280                 .name = "panel-s6e88a0-ams452ef01",
 281                 .of_match_table = s6e88a0_ams452ef01_of_match,
 282         },
 283 };
 284 module_mipi_dsi_driver(s6e88a0_ams452ef01_driver);
 285
 286 MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>");
 287 MODULE_DESCRIPTION("MIPI-DSI based Panel Driver for AMS452EF01 AMOLED LCD with a S6E88A0 controller");
 288 MODULE_LICENSE("GPL v2");