Rob Clark | 16ea975 | 2013-01-08 15:04:28 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Texas Instruments |
| 3 | * Author: Rob Clark <robdclark@gmail.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 as published by |
| 7 | * the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/i2c.h> |
Rob Clark | 16ea975 | 2013-01-08 15:04:28 -0600 | [diff] [blame] | 19 | #include <linux/gpio.h> |
| 20 | #include <linux/of_gpio.h> |
| 21 | #include <linux/pinctrl/pinmux.h> |
| 22 | #include <linux/pinctrl/consumer.h> |
| 23 | |
| 24 | #include "tilcdc_drv.h" |
| 25 | |
| 26 | struct tfp410_module { |
| 27 | struct tilcdc_module base; |
| 28 | struct i2c_adapter *i2c; |
| 29 | int gpio; |
| 30 | }; |
| 31 | #define to_tfp410_module(x) container_of(x, struct tfp410_module, base) |
| 32 | |
| 33 | |
| 34 | static const struct tilcdc_panel_info dvi_info = { |
| 35 | .ac_bias = 255, |
| 36 | .ac_bias_intrpt = 0, |
| 37 | .dma_burst_sz = 16, |
| 38 | .bpp = 16, |
| 39 | .fdd = 0x80, |
| 40 | .tft_alt_mode = 0, |
| 41 | .sync_edge = 0, |
| 42 | .sync_ctrl = 1, |
| 43 | .raster_order = 0, |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * Encoder: |
| 48 | */ |
| 49 | |
| 50 | struct tfp410_encoder { |
| 51 | struct drm_encoder base; |
| 52 | struct tfp410_module *mod; |
| 53 | int dpms; |
| 54 | }; |
| 55 | #define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base) |
| 56 | |
| 57 | |
| 58 | static void tfp410_encoder_destroy(struct drm_encoder *encoder) |
| 59 | { |
| 60 | struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder); |
| 61 | drm_encoder_cleanup(encoder); |
| 62 | kfree(tfp410_encoder); |
| 63 | } |
| 64 | |
| 65 | static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode) |
| 66 | { |
| 67 | struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder); |
| 68 | |
| 69 | if (tfp410_encoder->dpms == mode) |
| 70 | return; |
| 71 | |
| 72 | if (mode == DRM_MODE_DPMS_ON) { |
| 73 | DBG("Power on"); |
| 74 | gpio_direction_output(tfp410_encoder->mod->gpio, 1); |
| 75 | } else { |
| 76 | DBG("Power off"); |
| 77 | gpio_direction_output(tfp410_encoder->mod->gpio, 0); |
| 78 | } |
| 79 | |
| 80 | tfp410_encoder->dpms = mode; |
| 81 | } |
| 82 | |
| 83 | static bool tfp410_encoder_mode_fixup(struct drm_encoder *encoder, |
| 84 | const struct drm_display_mode *mode, |
| 85 | struct drm_display_mode *adjusted_mode) |
| 86 | { |
| 87 | /* nothing needed */ |
| 88 | return true; |
| 89 | } |
| 90 | |
| 91 | static void tfp410_encoder_prepare(struct drm_encoder *encoder) |
| 92 | { |
| 93 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); |
| 94 | tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info); |
| 95 | } |
| 96 | |
| 97 | static void tfp410_encoder_commit(struct drm_encoder *encoder) |
| 98 | { |
| 99 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON); |
| 100 | } |
| 101 | |
| 102 | static void tfp410_encoder_mode_set(struct drm_encoder *encoder, |
| 103 | struct drm_display_mode *mode, |
| 104 | struct drm_display_mode *adjusted_mode) |
| 105 | { |
| 106 | /* nothing needed */ |
| 107 | } |
| 108 | |
| 109 | static const struct drm_encoder_funcs tfp410_encoder_funcs = { |
| 110 | .destroy = tfp410_encoder_destroy, |
| 111 | }; |
| 112 | |
| 113 | static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = { |
| 114 | .dpms = tfp410_encoder_dpms, |
| 115 | .mode_fixup = tfp410_encoder_mode_fixup, |
| 116 | .prepare = tfp410_encoder_prepare, |
| 117 | .commit = tfp410_encoder_commit, |
| 118 | .mode_set = tfp410_encoder_mode_set, |
| 119 | }; |
| 120 | |
| 121 | static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev, |
| 122 | struct tfp410_module *mod) |
| 123 | { |
| 124 | struct tfp410_encoder *tfp410_encoder; |
| 125 | struct drm_encoder *encoder; |
| 126 | int ret; |
| 127 | |
| 128 | tfp410_encoder = kzalloc(sizeof(*tfp410_encoder), GFP_KERNEL); |
| 129 | if (!tfp410_encoder) { |
| 130 | dev_err(dev->dev, "allocation failed\n"); |
| 131 | return NULL; |
| 132 | } |
| 133 | |
| 134 | tfp410_encoder->dpms = DRM_MODE_DPMS_OFF; |
| 135 | tfp410_encoder->mod = mod; |
| 136 | |
| 137 | encoder = &tfp410_encoder->base; |
| 138 | encoder->possible_crtcs = 1; |
| 139 | |
| 140 | ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs, |
| 141 | DRM_MODE_ENCODER_TMDS); |
| 142 | if (ret < 0) |
| 143 | goto fail; |
| 144 | |
| 145 | drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs); |
| 146 | |
| 147 | return encoder; |
| 148 | |
| 149 | fail: |
| 150 | tfp410_encoder_destroy(encoder); |
| 151 | return NULL; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * Connector: |
| 156 | */ |
| 157 | |
| 158 | struct tfp410_connector { |
| 159 | struct drm_connector base; |
| 160 | |
| 161 | struct drm_encoder *encoder; /* our connected encoder */ |
| 162 | struct tfp410_module *mod; |
| 163 | }; |
| 164 | #define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base) |
| 165 | |
| 166 | |
| 167 | static void tfp410_connector_destroy(struct drm_connector *connector) |
| 168 | { |
| 169 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); |
| 170 | drm_connector_cleanup(connector); |
| 171 | kfree(tfp410_connector); |
| 172 | } |
| 173 | |
| 174 | static enum drm_connector_status tfp410_connector_detect( |
| 175 | struct drm_connector *connector, |
| 176 | bool force) |
| 177 | { |
| 178 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); |
| 179 | |
| 180 | if (drm_probe_ddc(tfp410_connector->mod->i2c)) |
| 181 | return connector_status_connected; |
| 182 | |
| 183 | return connector_status_unknown; |
| 184 | } |
| 185 | |
| 186 | static int tfp410_connector_get_modes(struct drm_connector *connector) |
| 187 | { |
| 188 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); |
| 189 | struct edid *edid; |
| 190 | int ret = 0; |
| 191 | |
| 192 | edid = drm_get_edid(connector, tfp410_connector->mod->i2c); |
| 193 | |
| 194 | drm_mode_connector_update_edid_property(connector, edid); |
| 195 | |
| 196 | if (edid) { |
| 197 | ret = drm_add_edid_modes(connector, edid); |
| 198 | kfree(edid); |
| 199 | } |
| 200 | |
| 201 | return ret; |
| 202 | } |
| 203 | |
| 204 | static int tfp410_connector_mode_valid(struct drm_connector *connector, |
| 205 | struct drm_display_mode *mode) |
| 206 | { |
| 207 | struct tilcdc_drm_private *priv = connector->dev->dev_private; |
| 208 | /* our only constraints are what the crtc can generate: */ |
| 209 | return tilcdc_crtc_mode_valid(priv->crtc, mode); |
| 210 | } |
| 211 | |
| 212 | static struct drm_encoder *tfp410_connector_best_encoder( |
| 213 | struct drm_connector *connector) |
| 214 | { |
| 215 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); |
| 216 | return tfp410_connector->encoder; |
| 217 | } |
| 218 | |
| 219 | static const struct drm_connector_funcs tfp410_connector_funcs = { |
| 220 | .destroy = tfp410_connector_destroy, |
| 221 | .dpms = drm_helper_connector_dpms, |
| 222 | .detect = tfp410_connector_detect, |
| 223 | .fill_modes = drm_helper_probe_single_connector_modes, |
| 224 | }; |
| 225 | |
| 226 | static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = { |
| 227 | .get_modes = tfp410_connector_get_modes, |
| 228 | .mode_valid = tfp410_connector_mode_valid, |
| 229 | .best_encoder = tfp410_connector_best_encoder, |
| 230 | }; |
| 231 | |
| 232 | static struct drm_connector *tfp410_connector_create(struct drm_device *dev, |
| 233 | struct tfp410_module *mod, struct drm_encoder *encoder) |
| 234 | { |
| 235 | struct tfp410_connector *tfp410_connector; |
| 236 | struct drm_connector *connector; |
| 237 | int ret; |
| 238 | |
| 239 | tfp410_connector = kzalloc(sizeof(*tfp410_connector), GFP_KERNEL); |
| 240 | if (!tfp410_connector) { |
| 241 | dev_err(dev->dev, "allocation failed\n"); |
| 242 | return NULL; |
| 243 | } |
| 244 | |
| 245 | tfp410_connector->encoder = encoder; |
| 246 | tfp410_connector->mod = mod; |
| 247 | |
| 248 | connector = &tfp410_connector->base; |
| 249 | |
| 250 | drm_connector_init(dev, connector, &tfp410_connector_funcs, |
| 251 | DRM_MODE_CONNECTOR_DVID); |
| 252 | drm_connector_helper_add(connector, &tfp410_connector_helper_funcs); |
| 253 | |
| 254 | connector->polled = DRM_CONNECTOR_POLL_CONNECT | |
| 255 | DRM_CONNECTOR_POLL_DISCONNECT; |
| 256 | |
| 257 | connector->interlace_allowed = 0; |
| 258 | connector->doublescan_allowed = 0; |
| 259 | |
| 260 | ret = drm_mode_connector_attach_encoder(connector, encoder); |
| 261 | if (ret) |
| 262 | goto fail; |
| 263 | |
| 264 | drm_sysfs_connector_add(connector); |
| 265 | |
| 266 | return connector; |
| 267 | |
| 268 | fail: |
| 269 | tfp410_connector_destroy(connector); |
| 270 | return NULL; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Module: |
| 275 | */ |
| 276 | |
| 277 | static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) |
| 278 | { |
| 279 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); |
| 280 | struct tilcdc_drm_private *priv = dev->dev_private; |
| 281 | struct drm_encoder *encoder; |
| 282 | struct drm_connector *connector; |
| 283 | |
| 284 | encoder = tfp410_encoder_create(dev, tfp410_mod); |
| 285 | if (!encoder) |
| 286 | return -ENOMEM; |
| 287 | |
| 288 | connector = tfp410_connector_create(dev, tfp410_mod, encoder); |
| 289 | if (!connector) |
| 290 | return -ENOMEM; |
| 291 | |
| 292 | priv->encoders[priv->num_encoders++] = encoder; |
| 293 | priv->connectors[priv->num_connectors++] = connector; |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static void tfp410_destroy(struct tilcdc_module *mod) |
| 299 | { |
| 300 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); |
| 301 | |
| 302 | if (tfp410_mod->i2c) |
| 303 | i2c_put_adapter(tfp410_mod->i2c); |
| 304 | |
| 305 | if (!IS_ERR_VALUE(tfp410_mod->gpio)) |
| 306 | gpio_free(tfp410_mod->gpio); |
| 307 | |
| 308 | tilcdc_module_cleanup(mod); |
| 309 | kfree(tfp410_mod); |
| 310 | } |
| 311 | |
| 312 | static const struct tilcdc_module_ops tfp410_module_ops = { |
| 313 | .modeset_init = tfp410_modeset_init, |
| 314 | .destroy = tfp410_destroy, |
| 315 | }; |
| 316 | |
| 317 | /* |
| 318 | * Device: |
| 319 | */ |
| 320 | |
| 321 | static struct of_device_id tfp410_of_match[]; |
| 322 | |
| 323 | static int tfp410_probe(struct platform_device *pdev) |
| 324 | { |
| 325 | struct device_node *node = pdev->dev.of_node; |
| 326 | struct device_node *i2c_node; |
| 327 | struct tfp410_module *tfp410_mod; |
| 328 | struct tilcdc_module *mod; |
| 329 | struct pinctrl *pinctrl; |
| 330 | uint32_t i2c_phandle; |
| 331 | int ret = -EINVAL; |
| 332 | |
| 333 | /* bail out early if no DT data: */ |
| 334 | if (!node) { |
| 335 | dev_err(&pdev->dev, "device-tree data is missing\n"); |
| 336 | return -ENXIO; |
| 337 | } |
| 338 | |
| 339 | tfp410_mod = kzalloc(sizeof(*tfp410_mod), GFP_KERNEL); |
| 340 | if (!tfp410_mod) |
| 341 | return -ENOMEM; |
| 342 | |
| 343 | mod = &tfp410_mod->base; |
| 344 | |
| 345 | tilcdc_module_init(mod, "tfp410", &tfp410_module_ops); |
| 346 | |
| 347 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); |
| 348 | if (IS_ERR(pinctrl)) |
| 349 | dev_warn(&pdev->dev, "pins are not configured\n"); |
| 350 | |
| 351 | if (of_property_read_u32(node, "i2c", &i2c_phandle)) { |
| 352 | dev_err(&pdev->dev, "could not get i2c bus phandle\n"); |
| 353 | goto fail; |
| 354 | } |
| 355 | |
Benoit Parrot | dc28aa0 | 2013-06-18 17:18:31 -0500 | [diff] [blame] | 356 | mod->preferred_bpp = dvi_info.bpp; |
| 357 | |
Rob Clark | 16ea975 | 2013-01-08 15:04:28 -0600 | [diff] [blame] | 358 | i2c_node = of_find_node_by_phandle(i2c_phandle); |
| 359 | if (!i2c_node) { |
| 360 | dev_err(&pdev->dev, "could not get i2c bus node\n"); |
| 361 | goto fail; |
| 362 | } |
| 363 | |
| 364 | tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node); |
| 365 | if (!tfp410_mod->i2c) { |
| 366 | dev_err(&pdev->dev, "could not get i2c\n"); |
| 367 | goto fail; |
| 368 | } |
| 369 | |
| 370 | of_node_put(i2c_node); |
| 371 | |
| 372 | tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio", |
| 373 | 0, NULL); |
| 374 | if (IS_ERR_VALUE(tfp410_mod->gpio)) { |
| 375 | dev_warn(&pdev->dev, "No power down GPIO\n"); |
| 376 | } else { |
| 377 | ret = gpio_request(tfp410_mod->gpio, "DVI_PDn"); |
| 378 | if (ret) { |
| 379 | dev_err(&pdev->dev, "could not get DVI_PDn gpio\n"); |
| 380 | goto fail; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | |
| 386 | fail: |
| 387 | tfp410_destroy(mod); |
| 388 | return ret; |
| 389 | } |
| 390 | |
| 391 | static int tfp410_remove(struct platform_device *pdev) |
| 392 | { |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static struct of_device_id tfp410_of_match[] = { |
| 397 | { .compatible = "ti,tilcdc,tfp410", }, |
| 398 | { }, |
| 399 | }; |
Rob Clark | 16ea975 | 2013-01-08 15:04:28 -0600 | [diff] [blame] | 400 | |
| 401 | struct platform_driver tfp410_driver = { |
| 402 | .probe = tfp410_probe, |
| 403 | .remove = tfp410_remove, |
| 404 | .driver = { |
| 405 | .owner = THIS_MODULE, |
| 406 | .name = "tfp410", |
| 407 | .of_match_table = tfp410_of_match, |
| 408 | }, |
| 409 | }; |
| 410 | |
| 411 | int __init tilcdc_tfp410_init(void) |
| 412 | { |
| 413 | return platform_driver_register(&tfp410_driver); |
| 414 | } |
| 415 | |
| 416 | void __exit tilcdc_tfp410_fini(void) |
| 417 | { |
| 418 | platform_driver_unregister(&tfp410_driver); |
| 419 | } |