drivers/video/fbdev/omap2/displays-new/connector-hdmi.c

   1 /*
   2  * HDMI Connector driver
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   5  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/of.h>
  16
  17 #include <drm/drm_edid.h>
  18
  19 #include <video/omapdss.h>
  20 #include <video/omap-panel-data.h>
  21
  22 static const struct omap_video_timings hdmic_default_timings = {
  23         .x_res          = 640,
  24         .y_res          = 480,
  25         .pixelclock     = 25175000,
  26         .hsw            = 96,
  27         .hfp            = 16,
  28         .hbp            = 48,
  29         .vsw            = 2,
  30         .vfp            = 11,
  31         .vbp            = 31,
  32
  33         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  34         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  35
  36         .interlace      = false,
  37 };
  38
  39 struct panel_drv_data {
  40         struct omap_dss_device dssdev;
  41         struct omap_dss_device *in;
  42
  43         struct device *dev;
  44
  45         struct omap_video_timings timings;
  46 };
  47
  48 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
  49
  50 static int hdmic_connect(struct omap_dss_device *dssdev)
  51 {
  52         struct panel_drv_data *ddata = to_panel_data(dssdev);
  53         struct omap_dss_device *in = ddata->in;
  54         int r;
  55
  56         dev_dbg(ddata->dev, "connect\n");
  57
  58         if (omapdss_device_is_connected(dssdev))
  59                 return 0;
  60
  61         r = in->ops.hdmi->connect(in, dssdev);
  62         if (r)
  63                 return r;
  64
  65         return 0;
  66 }
  67
  68 static void hdmic_disconnect(struct omap_dss_device *dssdev)
  69 {
  70         struct panel_drv_data *ddata = to_panel_data(dssdev);
  71         struct omap_dss_device *in = ddata->in;
  72
  73         dev_dbg(ddata->dev, "disconnect\n");
  74
  75         if (!omapdss_device_is_connected(dssdev))
  76                 return;
  77
  78         in->ops.hdmi->disconnect(in, dssdev);
  79 }
  80
  81 static int hdmic_enable(struct omap_dss_device *dssdev)
  82 {
  83         struct panel_drv_data *ddata = to_panel_data(dssdev);
  84         struct omap_dss_device *in = ddata->in;
  85         int r;
  86
  87         dev_dbg(ddata->dev, "enable\n");
  88
  89         if (!omapdss_device_is_connected(dssdev))
  90                 return -ENODEV;
  91
  92         if (omapdss_device_is_enabled(dssdev))
  93                 return 0;
  94
  95         in->ops.hdmi->set_timings(in, &ddata->timings);
  96
  97         r = in->ops.hdmi->enable(in);
  98         if (r)
  99                 return r;
 100
 101         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 102
 103         return r;
 104 }
 105
 106 static void hdmic_disable(struct omap_dss_device *dssdev)
 107 {
 108         struct panel_drv_data *ddata = to_panel_data(dssdev);
 109         struct omap_dss_device *in = ddata->in;
 110
 111         dev_dbg(ddata->dev, "disable\n");
 112
 113         if (!omapdss_device_is_enabled(dssdev))
 114                 return;
 115
 116         in->ops.hdmi->disable(in);
 117
 118         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 119 }
 120
 121 static void hdmic_set_timings(struct omap_dss_device *dssdev,
 122                 struct omap_video_timings *timings)
 123 {
 124         struct panel_drv_data *ddata = to_panel_data(dssdev);
 125         struct omap_dss_device *in = ddata->in;
 126
 127         ddata->timings = *timings;
 128         dssdev->panel.timings = *timings;
 129
 130         in->ops.hdmi->set_timings(in, timings);
 131 }
 132
 133 static void hdmic_get_timings(struct omap_dss_device *dssdev,
 134                 struct omap_video_timings *timings)
 135 {
 136         struct panel_drv_data *ddata = to_panel_data(dssdev);
 137
 138         *timings = ddata->timings;
 139 }
 140
 141 static int hdmic_check_timings(struct omap_dss_device *dssdev,
 142                 struct omap_video_timings *timings)
 143 {
 144         struct panel_drv_data *ddata = to_panel_data(dssdev);
 145         struct omap_dss_device *in = ddata->in;
 146
 147         return in->ops.hdmi->check_timings(in, timings);
 148 }
 149
 150 static int hdmic_read_edid(struct omap_dss_device *dssdev,
 151                 u8 *edid, int len)
 152 {
 153         struct panel_drv_data *ddata = to_panel_data(dssdev);
 154         struct omap_dss_device *in = ddata->in;
 155
 156         return in->ops.hdmi->read_edid(in, edid, len);
 157 }
 158
 159 static bool hdmic_detect(struct omap_dss_device *dssdev)
 160 {
 161         struct panel_drv_data *ddata = to_panel_data(dssdev);
 162         struct omap_dss_device *in = ddata->in;
 163
 164         return in->ops.hdmi->detect(in);
 165 }
 166
 167 static int hdmic_audio_enable(struct omap_dss_device *dssdev)
 168 {
 169         struct panel_drv_data *ddata = to_panel_data(dssdev);
 170         struct omap_dss_device *in = ddata->in;
 171         int r;
 172
 173         /* enable audio only if the display is active */
 174         if (!omapdss_device_is_enabled(dssdev))
 175                 return -EPERM;
 176
 177         r = in->ops.hdmi->audio_enable(in);
 178         if (r)
 179                 return r;
 180
 181         dssdev->audio_state = OMAP_DSS_AUDIO_ENABLED;
 182
 183         return 0;
 184 }
 185
 186 static void hdmic_audio_disable(struct omap_dss_device *dssdev)
 187 {
 188         struct panel_drv_data *ddata = to_panel_data(dssdev);
 189         struct omap_dss_device *in = ddata->in;
 190
 191         in->ops.hdmi->audio_disable(in);
 192
 193         dssdev->audio_state = OMAP_DSS_AUDIO_DISABLED;
 194 }
 195
 196 static int hdmic_audio_start(struct omap_dss_device *dssdev)
 197 {
 198         struct panel_drv_data *ddata = to_panel_data(dssdev);
 199         struct omap_dss_device *in = ddata->in;
 200         int r;
 201
 202         /*
 203          * No need to check the panel state. It was checked when trasitioning
 204          * to AUDIO_ENABLED.
 205          */
 206         if (dssdev->audio_state != OMAP_DSS_AUDIO_ENABLED)
 207                 return -EPERM;
 208
 209         r = in->ops.hdmi->audio_start(in);
 210         if (r)
 211                 return r;
 212
 213         dssdev->audio_state = OMAP_DSS_AUDIO_PLAYING;
 214
 215         return 0;
 216 }
 217
 218 static void hdmic_audio_stop(struct omap_dss_device *dssdev)
 219 {
 220         struct panel_drv_data *ddata = to_panel_data(dssdev);
 221         struct omap_dss_device *in = ddata->in;
 222
 223         in->ops.hdmi->audio_stop(in);
 224
 225         dssdev->audio_state = OMAP_DSS_AUDIO_ENABLED;
 226 }
 227
 228 static bool hdmic_audio_supported(struct omap_dss_device *dssdev)
 229 {
 230         struct panel_drv_data *ddata = to_panel_data(dssdev);
 231         struct omap_dss_device *in = ddata->in;
 232
 233         if (!omapdss_device_is_enabled(dssdev))
 234                 return false;
 235
 236         return in->ops.hdmi->audio_supported(in);
 237 }
 238
 239 static int hdmic_audio_config(struct omap_dss_device *dssdev,
 240                 struct omap_dss_audio *audio)
 241 {
 242         struct panel_drv_data *ddata = to_panel_data(dssdev);
 243         struct omap_dss_device *in = ddata->in;
 244         int r;
 245
 246         /* config audio only if the display is active */
 247         if (!omapdss_device_is_enabled(dssdev))
 248                 return -EPERM;
 249
 250         r = in->ops.hdmi->audio_config(in, audio);
 251         if (r)
 252                 return r;
 253
 254         dssdev->audio_state = OMAP_DSS_AUDIO_CONFIGURED;
 255
 256         return 0;
 257 }
 258
 259 static struct omap_dss_driver hdmic_driver = {
 260         .connect                = hdmic_connect,
 261         .disconnect             = hdmic_disconnect,
 262
 263         .enable                 = hdmic_enable,
 264         .disable                = hdmic_disable,
 265
 266         .set_timings            = hdmic_set_timings,
 267         .get_timings            = hdmic_get_timings,
 268         .check_timings          = hdmic_check_timings,
 269
 270         .get_resolution         = omapdss_default_get_resolution,
 271
 272         .read_edid              = hdmic_read_edid,
 273         .detect                 = hdmic_detect,
 274
 275         .audio_enable           = hdmic_audio_enable,
 276         .audio_disable          = hdmic_audio_disable,
 277         .audio_start            = hdmic_audio_start,
 278         .audio_stop             = hdmic_audio_stop,
 279         .audio_supported        = hdmic_audio_supported,
 280         .audio_config           = hdmic_audio_config,
 281 };
 282
 283 static int hdmic_probe_pdata(struct platform_device *pdev)
 284 {
 285         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 286         struct connector_hdmi_platform_data *pdata;
 287         struct omap_dss_device *in, *dssdev;
 288
 289         pdata = dev_get_platdata(&pdev->dev);
 290
 291         in = omap_dss_find_output(pdata->source);
 292         if (in == NULL) {
 293                 dev_err(&pdev->dev, "Failed to find video source\n");
 294                 return -EPROBE_DEFER;
 295         }
 296
 297         ddata->in = in;
 298
 299         dssdev = &ddata->dssdev;
 300         dssdev->name = pdata->name;
 301
 302         return 0;
 303 }
 304
 305 static int hdmic_probe_of(struct platform_device *pdev)
 306 {
 307         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 308         struct device_node *node = pdev->dev.of_node;
 309         struct omap_dss_device *in;
 310
 311         in = omapdss_of_find_source_for_first_ep(node);
 312         if (IS_ERR(in)) {
 313                 dev_err(&pdev->dev, "failed to find video source\n");
 314                 return PTR_ERR(in);
 315         }
 316
 317         ddata->in = in;
 318
 319         return 0;
 320 }
 321
 322 static int hdmic_probe(struct platform_device *pdev)
 323 {
 324         struct panel_drv_data *ddata;
 325         struct omap_dss_device *dssdev;
 326         int r;
 327
 328         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 329         if (!ddata)
 330                 return -ENOMEM;
 331
 332         platform_set_drvdata(pdev, ddata);
 333         ddata->dev = &pdev->dev;
 334
 335         if (dev_get_platdata(&pdev->dev)) {
 336                 r = hdmic_probe_pdata(pdev);
 337                 if (r)
 338                         return r;
 339         } else if (pdev->dev.of_node) {
 340                 r = hdmic_probe_of(pdev);
 341                 if (r)
 342                         return r;
 343         } else {
 344                 return -ENODEV;
 345         }
 346
 347         ddata->timings = hdmic_default_timings;
 348
 349         dssdev = &ddata->dssdev;
 350         dssdev->driver = &hdmic_driver;
 351         dssdev->dev = &pdev->dev;
 352         dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
 353         dssdev->owner = THIS_MODULE;
 354         dssdev->panel.timings = hdmic_default_timings;
 355
 356         r = omapdss_register_display(dssdev);
 357         if (r) {
 358                 dev_err(&pdev->dev, "Failed to register panel\n");
 359                 goto err_reg;
 360         }
 361
 362         return 0;
 363 err_reg:
 364         omap_dss_put_device(ddata->in);
 365         return r;
 366 }
 367
 368 static int __exit hdmic_remove(struct platform_device *pdev)
 369 {
 370         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 371         struct omap_dss_device *dssdev = &ddata->dssdev;
 372         struct omap_dss_device *in = ddata->in;
 373
 374         omapdss_unregister_display(&ddata->dssdev);
 375
 376         hdmic_disable(dssdev);
 377         hdmic_disconnect(dssdev);
 378
 379         omap_dss_put_device(in);
 380
 381         return 0;
 382 }
 383
 384 static const struct of_device_id hdmic_of_match[] = {
 385         { .compatible = "omapdss,hdmi-connector", },
 386         {},
 387 };
 388
 389 MODULE_DEVICE_TABLE(of, hdmic_of_match);
 390
 391 static struct platform_driver hdmi_connector_driver = {
 392         .probe  = hdmic_probe,
 393         .remove = __exit_p(hdmic_remove),
 394         .driver = {
 395                 .name   = "connector-hdmi",
 396                 .owner  = THIS_MODULE,
 397                 .of_match_table = hdmic_of_match,
 398         },
 399 };
 400
 401 module_platform_driver(hdmi_connector_driver);
 402
 403 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 404 MODULE_DESCRIPTION("HDMI Connector driver");
 405 MODULE_LICENSE("GPL");