Rob Clark | 0d4bbaf | 2012-12-18 17:34:16 -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/pinctrl/pinmux.h> |
| 19 | #include <linux/pinctrl/consumer.h> |
| 20 | #include <linux/backlight.h> |
| 21 | #include <video/display_timing.h> |
| 22 | #include <video/of_display_timing.h> |
| 23 | #include <video/videomode.h> |
| 24 | |
| 25 | #include "tilcdc_drv.h" |
| 26 | |
| 27 | struct panel_module { |
| 28 | struct tilcdc_module base; |
| 29 | struct tilcdc_panel_info *info; |
| 30 | struct display_timings *timings; |
| 31 | struct backlight_device *backlight; |
| 32 | }; |
| 33 | #define to_panel_module(x) container_of(x, struct panel_module, base) |
| 34 | |
| 35 | |
| 36 | /* |
| 37 | * Encoder: |
| 38 | */ |
| 39 | |
| 40 | struct panel_encoder { |
| 41 | struct drm_encoder base; |
| 42 | struct panel_module *mod; |
| 43 | }; |
| 44 | #define to_panel_encoder(x) container_of(x, struct panel_encoder, base) |
| 45 | |
| 46 | |
| 47 | static void panel_encoder_destroy(struct drm_encoder *encoder) |
| 48 | { |
| 49 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); |
| 50 | drm_encoder_cleanup(encoder); |
| 51 | kfree(panel_encoder); |
| 52 | } |
| 53 | |
| 54 | static void panel_encoder_dpms(struct drm_encoder *encoder, int mode) |
| 55 | { |
| 56 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); |
| 57 | struct backlight_device *backlight = panel_encoder->mod->backlight; |
| 58 | |
| 59 | if (!backlight) |
| 60 | return; |
| 61 | |
| 62 | backlight->props.power = mode == DRM_MODE_DPMS_ON |
| 63 | ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; |
| 64 | backlight_update_status(backlight); |
| 65 | } |
| 66 | |
| 67 | static bool panel_encoder_mode_fixup(struct drm_encoder *encoder, |
| 68 | const struct drm_display_mode *mode, |
| 69 | struct drm_display_mode *adjusted_mode) |
| 70 | { |
| 71 | /* nothing needed */ |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | static void panel_encoder_prepare(struct drm_encoder *encoder) |
| 76 | { |
| 77 | struct panel_encoder *panel_encoder = to_panel_encoder(encoder); |
| 78 | panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); |
| 79 | tilcdc_crtc_set_panel_info(encoder->crtc, panel_encoder->mod->info); |
| 80 | } |
| 81 | |
| 82 | static void panel_encoder_commit(struct drm_encoder *encoder) |
| 83 | { |
| 84 | panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON); |
| 85 | } |
| 86 | |
| 87 | static void panel_encoder_mode_set(struct drm_encoder *encoder, |
| 88 | struct drm_display_mode *mode, |
| 89 | struct drm_display_mode *adjusted_mode) |
| 90 | { |
| 91 | /* nothing needed */ |
| 92 | } |
| 93 | |
| 94 | static const struct drm_encoder_funcs panel_encoder_funcs = { |
| 95 | .destroy = panel_encoder_destroy, |
| 96 | }; |
| 97 | |
| 98 | static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = { |
| 99 | .dpms = panel_encoder_dpms, |
| 100 | .mode_fixup = panel_encoder_mode_fixup, |
| 101 | .prepare = panel_encoder_prepare, |
| 102 | .commit = panel_encoder_commit, |
| 103 | .mode_set = panel_encoder_mode_set, |
| 104 | }; |
| 105 | |
| 106 | static struct drm_encoder *panel_encoder_create(struct drm_device *dev, |
| 107 | struct panel_module *mod) |
| 108 | { |
| 109 | struct panel_encoder *panel_encoder; |
| 110 | struct drm_encoder *encoder; |
| 111 | int ret; |
| 112 | |
| 113 | panel_encoder = kzalloc(sizeof(*panel_encoder), GFP_KERNEL); |
| 114 | if (!panel_encoder) { |
| 115 | dev_err(dev->dev, "allocation failed\n"); |
| 116 | return NULL; |
| 117 | } |
| 118 | |
| 119 | panel_encoder->mod = mod; |
| 120 | |
| 121 | encoder = &panel_encoder->base; |
| 122 | encoder->possible_crtcs = 1; |
| 123 | |
| 124 | ret = drm_encoder_init(dev, encoder, &panel_encoder_funcs, |
| 125 | DRM_MODE_ENCODER_LVDS); |
| 126 | if (ret < 0) |
| 127 | goto fail; |
| 128 | |
| 129 | drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs); |
| 130 | |
| 131 | return encoder; |
| 132 | |
| 133 | fail: |
| 134 | panel_encoder_destroy(encoder); |
| 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Connector: |
| 140 | */ |
| 141 | |
| 142 | struct panel_connector { |
| 143 | struct drm_connector base; |
| 144 | |
| 145 | struct drm_encoder *encoder; /* our connected encoder */ |
| 146 | struct panel_module *mod; |
| 147 | }; |
| 148 | #define to_panel_connector(x) container_of(x, struct panel_connector, base) |
| 149 | |
| 150 | |
| 151 | static void panel_connector_destroy(struct drm_connector *connector) |
| 152 | { |
| 153 | struct panel_connector *panel_connector = to_panel_connector(connector); |
| 154 | drm_connector_cleanup(connector); |
| 155 | kfree(panel_connector); |
| 156 | } |
| 157 | |
| 158 | static enum drm_connector_status panel_connector_detect( |
| 159 | struct drm_connector *connector, |
| 160 | bool force) |
| 161 | { |
| 162 | return connector_status_connected; |
| 163 | } |
| 164 | |
| 165 | static int panel_connector_get_modes(struct drm_connector *connector) |
| 166 | { |
| 167 | struct drm_device *dev = connector->dev; |
| 168 | struct panel_connector *panel_connector = to_panel_connector(connector); |
| 169 | struct display_timings *timings = panel_connector->mod->timings; |
| 170 | int i; |
| 171 | |
| 172 | for (i = 0; i < timings->num_timings; i++) { |
| 173 | struct drm_display_mode *mode = drm_mode_create(dev); |
| 174 | struct videomode vm; |
| 175 | |
Tomi Valkeinen | 6cd2c7d | 2013-03-21 14:20:12 +0200 | [diff] [blame] | 176 | if (videomode_from_timings(timings, &vm, i)) |
Rob Clark | 0d4bbaf | 2012-12-18 17:34:16 -0600 | [diff] [blame] | 177 | break; |
| 178 | |
| 179 | drm_display_mode_from_videomode(&vm, mode); |
| 180 | |
| 181 | mode->type = DRM_MODE_TYPE_DRIVER; |
| 182 | |
| 183 | if (timings->native_mode == i) |
| 184 | mode->type |= DRM_MODE_TYPE_PREFERRED; |
| 185 | |
| 186 | drm_mode_set_name(mode); |
| 187 | drm_mode_probed_add(connector, mode); |
| 188 | } |
| 189 | |
| 190 | return i; |
| 191 | } |
| 192 | |
| 193 | static int panel_connector_mode_valid(struct drm_connector *connector, |
| 194 | struct drm_display_mode *mode) |
| 195 | { |
| 196 | struct tilcdc_drm_private *priv = connector->dev->dev_private; |
| 197 | /* our only constraints are what the crtc can generate: */ |
| 198 | return tilcdc_crtc_mode_valid(priv->crtc, mode); |
| 199 | } |
| 200 | |
| 201 | static struct drm_encoder *panel_connector_best_encoder( |
| 202 | struct drm_connector *connector) |
| 203 | { |
| 204 | struct panel_connector *panel_connector = to_panel_connector(connector); |
| 205 | return panel_connector->encoder; |
| 206 | } |
| 207 | |
| 208 | static const struct drm_connector_funcs panel_connector_funcs = { |
| 209 | .destroy = panel_connector_destroy, |
| 210 | .dpms = drm_helper_connector_dpms, |
| 211 | .detect = panel_connector_detect, |
| 212 | .fill_modes = drm_helper_probe_single_connector_modes, |
| 213 | }; |
| 214 | |
| 215 | static const struct drm_connector_helper_funcs panel_connector_helper_funcs = { |
| 216 | .get_modes = panel_connector_get_modes, |
| 217 | .mode_valid = panel_connector_mode_valid, |
| 218 | .best_encoder = panel_connector_best_encoder, |
| 219 | }; |
| 220 | |
| 221 | static struct drm_connector *panel_connector_create(struct drm_device *dev, |
| 222 | struct panel_module *mod, struct drm_encoder *encoder) |
| 223 | { |
| 224 | struct panel_connector *panel_connector; |
| 225 | struct drm_connector *connector; |
| 226 | int ret; |
| 227 | |
| 228 | panel_connector = kzalloc(sizeof(*panel_connector), GFP_KERNEL); |
| 229 | if (!panel_connector) { |
| 230 | dev_err(dev->dev, "allocation failed\n"); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | panel_connector->encoder = encoder; |
| 235 | panel_connector->mod = mod; |
| 236 | |
| 237 | connector = &panel_connector->base; |
| 238 | |
| 239 | drm_connector_init(dev, connector, &panel_connector_funcs, |
| 240 | DRM_MODE_CONNECTOR_LVDS); |
| 241 | drm_connector_helper_add(connector, &panel_connector_helper_funcs); |
| 242 | |
| 243 | connector->interlace_allowed = 0; |
| 244 | connector->doublescan_allowed = 0; |
| 245 | |
| 246 | ret = drm_mode_connector_attach_encoder(connector, encoder); |
| 247 | if (ret) |
| 248 | goto fail; |
| 249 | |
| 250 | drm_sysfs_connector_add(connector); |
| 251 | |
| 252 | return connector; |
| 253 | |
| 254 | fail: |
| 255 | panel_connector_destroy(connector); |
| 256 | return NULL; |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * Module: |
| 261 | */ |
| 262 | |
| 263 | static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) |
| 264 | { |
| 265 | struct panel_module *panel_mod = to_panel_module(mod); |
| 266 | struct tilcdc_drm_private *priv = dev->dev_private; |
| 267 | struct drm_encoder *encoder; |
| 268 | struct drm_connector *connector; |
| 269 | |
| 270 | encoder = panel_encoder_create(dev, panel_mod); |
| 271 | if (!encoder) |
| 272 | return -ENOMEM; |
| 273 | |
| 274 | connector = panel_connector_create(dev, panel_mod, encoder); |
| 275 | if (!connector) |
| 276 | return -ENOMEM; |
| 277 | |
| 278 | priv->encoders[priv->num_encoders++] = encoder; |
| 279 | priv->connectors[priv->num_connectors++] = connector; |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static void panel_destroy(struct tilcdc_module *mod) |
| 285 | { |
| 286 | struct panel_module *panel_mod = to_panel_module(mod); |
| 287 | |
| 288 | if (panel_mod->timings) { |
| 289 | display_timings_release(panel_mod->timings); |
| 290 | kfree(panel_mod->timings); |
| 291 | } |
| 292 | |
| 293 | tilcdc_module_cleanup(mod); |
| 294 | kfree(panel_mod->info); |
| 295 | kfree(panel_mod); |
| 296 | } |
| 297 | |
| 298 | static const struct tilcdc_module_ops panel_module_ops = { |
| 299 | .modeset_init = panel_modeset_init, |
| 300 | .destroy = panel_destroy, |
| 301 | }; |
| 302 | |
| 303 | /* |
| 304 | * Device: |
| 305 | */ |
| 306 | |
| 307 | /* maybe move this somewhere common if it is needed by other outputs? */ |
Sachin Kamat | 1733d01 | 2013-03-02 15:53:09 +0530 | [diff] [blame] | 308 | static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np) |
Rob Clark | 0d4bbaf | 2012-12-18 17:34:16 -0600 | [diff] [blame] | 309 | { |
| 310 | struct device_node *info_np; |
| 311 | struct tilcdc_panel_info *info; |
| 312 | int ret = 0; |
| 313 | |
| 314 | if (!np) { |
| 315 | pr_err("%s: no devicenode given\n", __func__); |
| 316 | return NULL; |
| 317 | } |
| 318 | |
| 319 | info_np = of_get_child_by_name(np, "panel-info"); |
| 320 | if (!info_np) { |
| 321 | pr_err("%s: could not find panel-info node\n", __func__); |
| 322 | return NULL; |
| 323 | } |
| 324 | |
| 325 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
| 326 | if (!info) { |
| 327 | pr_err("%s: allocation failed\n", __func__); |
| 328 | return NULL; |
| 329 | } |
| 330 | |
| 331 | ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias); |
| 332 | ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt); |
| 333 | ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz); |
| 334 | ret |= of_property_read_u32(info_np, "bpp", &info->bpp); |
| 335 | ret |= of_property_read_u32(info_np, "fdd", &info->fdd); |
| 336 | ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge); |
| 337 | ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl); |
| 338 | ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order); |
| 339 | ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th); |
| 340 | |
| 341 | /* optional: */ |
| 342 | info->tft_alt_mode = of_property_read_bool(info_np, "tft-alt-mode"); |
| 343 | info->invert_pxl_clk = of_property_read_bool(info_np, "invert-pxl-clk"); |
| 344 | |
| 345 | if (ret) { |
| 346 | pr_err("%s: error reading panel-info properties\n", __func__); |
| 347 | kfree(info); |
| 348 | return NULL; |
| 349 | } |
| 350 | |
| 351 | return info; |
| 352 | } |
| 353 | |
| 354 | static struct of_device_id panel_of_match[]; |
| 355 | |
| 356 | static int panel_probe(struct platform_device *pdev) |
| 357 | { |
| 358 | struct device_node *node = pdev->dev.of_node; |
| 359 | struct panel_module *panel_mod; |
| 360 | struct tilcdc_module *mod; |
| 361 | struct pinctrl *pinctrl; |
| 362 | int ret = -EINVAL; |
| 363 | |
| 364 | |
| 365 | /* bail out early if no DT data: */ |
| 366 | if (!node) { |
| 367 | dev_err(&pdev->dev, "device-tree data is missing\n"); |
| 368 | return -ENXIO; |
| 369 | } |
| 370 | |
| 371 | panel_mod = kzalloc(sizeof(*panel_mod), GFP_KERNEL); |
| 372 | if (!panel_mod) |
| 373 | return -ENOMEM; |
| 374 | |
| 375 | mod = &panel_mod->base; |
| 376 | |
| 377 | tilcdc_module_init(mod, "panel", &panel_module_ops); |
| 378 | |
| 379 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); |
| 380 | if (IS_ERR(pinctrl)) |
| 381 | dev_warn(&pdev->dev, "pins are not configured\n"); |
| 382 | |
| 383 | |
| 384 | panel_mod->timings = of_get_display_timings(node); |
| 385 | if (!panel_mod->timings) { |
| 386 | dev_err(&pdev->dev, "could not get panel timings\n"); |
| 387 | goto fail; |
| 388 | } |
| 389 | |
| 390 | panel_mod->info = of_get_panel_info(node); |
| 391 | if (!panel_mod->info) { |
| 392 | dev_err(&pdev->dev, "could not get panel info\n"); |
| 393 | goto fail; |
| 394 | } |
| 395 | |
Benoit Parrot | dc28aa0 | 2013-06-18 17:18:31 -0500 | [diff] [blame] | 396 | mod->preferred_bpp = panel_mod->info->bpp; |
| 397 | |
Rob Clark | 0d4bbaf | 2012-12-18 17:34:16 -0600 | [diff] [blame] | 398 | panel_mod->backlight = of_find_backlight_by_node(node); |
| 399 | if (panel_mod->backlight) |
| 400 | dev_info(&pdev->dev, "found backlight\n"); |
| 401 | |
| 402 | return 0; |
| 403 | |
| 404 | fail: |
| 405 | panel_destroy(mod); |
| 406 | return ret; |
| 407 | } |
| 408 | |
| 409 | static int panel_remove(struct platform_device *pdev) |
| 410 | { |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | static struct of_device_id panel_of_match[] = { |
| 415 | { .compatible = "ti,tilcdc,panel", }, |
| 416 | { }, |
| 417 | }; |
Rob Clark | 0d4bbaf | 2012-12-18 17:34:16 -0600 | [diff] [blame] | 418 | |
| 419 | struct platform_driver panel_driver = { |
| 420 | .probe = panel_probe, |
| 421 | .remove = panel_remove, |
| 422 | .driver = { |
| 423 | .owner = THIS_MODULE, |
| 424 | .name = "panel", |
| 425 | .of_match_table = panel_of_match, |
| 426 | }, |
| 427 | }; |
| 428 | |
| 429 | int __init tilcdc_panel_init(void) |
| 430 | { |
| 431 | return platform_driver_register(&panel_driver); |
| 432 | } |
| 433 | |
| 434 | void __exit tilcdc_panel_fini(void) |
| 435 | { |
| 436 | platform_driver_unregister(&panel_driver); |
| 437 | } |