drivers/gpu/drm/gma500/cdv_intel_hdmi.c

   1 /*
   2  * Copyright © 2006-2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      jim liu <jim.liu@intel.com>
  25  *
  26  * FIXME:
  27  *      We should probably make this generic and share it with Medfield
  28  */
  29
  30 #include <drm/drmP.h>
  31 #include <drm/drm.h>
  32 #include <drm/drm_crtc.h>
  33 #include <drm/drm_edid.h>
  34 #include "psb_intel_drv.h"
  35 #include "psb_drv.h"
  36 #include "psb_intel_reg.h"
  37 #include "cdv_device.h"
  38 #include <linux/pm_runtime.h>
  39
  40 /* hdmi control bits */
  41 #define HDMI_NULL_PACKETS_DURING_VSYNC  (1 << 9)
  42 #define HDMI_BORDER_ENABLE              (1 << 7)
  43 #define HDMI_AUDIO_ENABLE               (1 << 6)
  44 #define HDMI_VSYNC_ACTIVE_HIGH          (1 << 4)
  45 #define HDMI_HSYNC_ACTIVE_HIGH          (1 << 3)
  46 /* hdmi-b control bits */
  47 #define HDMIB_PIPE_B_SELECT             (1 << 30)
  48
  49
  50 struct mid_intel_hdmi_priv {
  51         u32 hdmi_reg;
  52         u32 save_HDMIB;
  53         bool has_hdmi_sink;
  54         bool has_hdmi_audio;
  55         /* Should set this when detect hotplug */
  56         bool hdmi_device_connected;
  57         struct mdfld_hdmi_i2c *i2c_bus;
  58         struct i2c_adapter *hdmi_i2c_adapter;   /* for control functions */
  59         struct drm_device *dev;
  60 };
  61
  62 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
  63                         struct drm_display_mode *mode,
  64                         struct drm_display_mode *adjusted_mode)
  65 {
  66         struct drm_device *dev = encoder->dev;
  67         struct psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
  68         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
  69         u32 hdmib;
  70         struct drm_crtc *crtc = encoder->crtc;
  71         struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
  72
  73         hdmib = (2 << 10);
  74
  75         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  76                 hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
  77         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  78                 hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
  79
  80         if (intel_crtc->pipe == 1)
  81                 hdmib |= HDMIB_PIPE_B_SELECT;
  82
  83         if (hdmi_priv->has_hdmi_audio) {
  84                 hdmib |= HDMI_AUDIO_ENABLE;
  85                 hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
  86         }
  87
  88         REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
  89         REG_READ(hdmi_priv->hdmi_reg);
  90 }
  91
  92 static bool cdv_hdmi_mode_fixup(struct drm_encoder *encoder,
  93                                   const struct drm_display_mode *mode,
  94                                   struct drm_display_mode *adjusted_mode)
  95 {
  96         return true;
  97 }
  98
  99 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
 100 {
 101         struct drm_device *dev = encoder->dev;
 102         struct psb_intel_encoder *psb_intel_encoder =
 103                                                 to_psb_intel_encoder(encoder);
 104         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 105         u32 hdmib;
 106
 107         hdmib = REG_READ(hdmi_priv->hdmi_reg);
 108
 109         if (mode != DRM_MODE_DPMS_ON)
 110                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 111         else
 112                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 113         REG_READ(hdmi_priv->hdmi_reg);
 114 }
 115
 116 static void cdv_hdmi_save(struct drm_connector *connector)
 117 {
 118         struct drm_device *dev = connector->dev;
 119         struct psb_intel_encoder *psb_intel_encoder =
 120                                         psb_intel_attached_encoder(connector);
 121         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 122
 123         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 124 }
 125
 126 static void cdv_hdmi_restore(struct drm_connector *connector)
 127 {
 128         struct drm_device *dev = connector->dev;
 129         struct psb_intel_encoder *psb_intel_encoder =
 130                                         psb_intel_attached_encoder(connector);
 131         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 132
 133         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 134         REG_READ(hdmi_priv->hdmi_reg);
 135 }
 136
 137 static enum drm_connector_status cdv_hdmi_detect(
 138                                 struct drm_connector *connector, bool force)
 139 {
 140         struct psb_intel_encoder *psb_intel_encoder =
 141                                         psb_intel_attached_encoder(connector);
 142         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 143         struct edid *edid = NULL;
 144         enum drm_connector_status status = connector_status_disconnected;
 145
 146         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 147
 148         hdmi_priv->has_hdmi_sink = false;
 149         hdmi_priv->has_hdmi_audio = false;
 150         if (edid) {
 151                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 152                         status = connector_status_connected;
 153                         hdmi_priv->has_hdmi_sink =
 154                                                 drm_detect_hdmi_monitor(edid);
 155                         hdmi_priv->has_hdmi_audio =
 156                                                 drm_detect_monitor_audio(edid);
 157                 }
 158                 kfree(edid);
 159         }
 160         return status;
 161 }
 162
 163 static int cdv_hdmi_set_property(struct drm_connector *connector,
 164                                        struct drm_property *property,
 165                                        uint64_t value)
 166 {
 167         struct drm_encoder *encoder = connector->encoder;
 168
 169         if (!strcmp(property->name, "scaling mode") && encoder) {
 170                 struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
 171                 bool centre;
 172                 uint64_t curValue;
 173
 174                 if (!crtc)
 175                         return -1;
 176
 177                 switch (value) {
 178                 case DRM_MODE_SCALE_FULLSCREEN:
 179                         break;
 180                 case DRM_MODE_SCALE_NO_SCALE:
 181                         break;
 182                 case DRM_MODE_SCALE_ASPECT:
 183                         break;
 184                 default:
 185                         return -1;
 186                 }
 187
 188                 if (drm_object_property_get_value(&connector->base,
 189                                                         property, &curValue))
 190                         return -1;
 191
 192                 if (curValue == value)
 193                         return 0;
 194
 195                 if (drm_object_property_set_value(&connector->base,
 196                                                         property, value))
 197                         return -1;
 198
 199                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 200                         (value == DRM_MODE_SCALE_NO_SCALE);
 201
 202                 if (crtc->saved_mode.hdisplay != 0 &&
 203                     crtc->saved_mode.vdisplay != 0) {
 204                         if (centre) {
 205                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 206                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 207                                         return -1;
 208                         } else {
 209                                 struct drm_encoder_helper_funcs *helpers
 210                                                     = encoder->helper_private;
 211                                 helpers->mode_set(encoder, &crtc->saved_mode,
 212                                              &crtc->saved_adjusted_mode);
 213                         }
 214                 }
 215         }
 216         return 0;
 217 }
 218
 219 /*
 220  * Return the list of HDMI DDC modes if available.
 221  */
 222 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 223 {
 224         struct psb_intel_encoder *psb_intel_encoder =
 225                                         psb_intel_attached_encoder(connector);
 226         struct edid *edid = NULL;
 227         int ret = 0;
 228
 229         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 230         if (edid) {
 231                 drm_mode_connector_update_edid_property(connector, edid);
 232                 ret = drm_add_edid_modes(connector, edid);
 233                 kfree(edid);
 234         }
 235         return ret;
 236 }
 237
 238 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 239                                  struct drm_display_mode *mode)
 240 {
 241         if (mode->clock > 165000)
 242                 return MODE_CLOCK_HIGH;
 243         if (mode->clock < 20000)
 244                 return MODE_CLOCK_HIGH;
 245
 246         /* just in case */
 247         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 248                 return MODE_NO_DBLESCAN;
 249
 250         /* just in case */
 251         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 252                 return MODE_NO_INTERLACE;
 253
 254         return MODE_OK;
 255 }
 256
 257 static void cdv_hdmi_destroy(struct drm_connector *connector)
 258 {
 259         struct psb_intel_encoder *psb_intel_encoder =
 260                                         psb_intel_attached_encoder(connector);
 261
 262         if (psb_intel_encoder->i2c_bus)
 263                 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
 264         drm_sysfs_connector_remove(connector);
 265         drm_connector_cleanup(connector);
 266         kfree(connector);
 267 }
 268
 269 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 270         .dpms = cdv_hdmi_dpms,
 271         .mode_fixup = cdv_hdmi_mode_fixup,
 272         .prepare = psb_intel_encoder_prepare,
 273         .mode_set = cdv_hdmi_mode_set,
 274         .commit = psb_intel_encoder_commit,
 275 };
 276
 277 static const struct drm_connector_helper_funcs
 278                                         cdv_hdmi_connector_helper_funcs = {
 279         .get_modes = cdv_hdmi_get_modes,
 280         .mode_valid = cdv_hdmi_mode_valid,
 281         .best_encoder = psb_intel_best_encoder,
 282 };
 283
 284 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 285         .dpms = drm_helper_connector_dpms,
 286         .save = cdv_hdmi_save,
 287         .restore = cdv_hdmi_restore,
 288         .detect = cdv_hdmi_detect,
 289         .fill_modes = drm_helper_probe_single_connector_modes,
 290         .set_property = cdv_hdmi_set_property,
 291         .destroy = cdv_hdmi_destroy,
 292 };
 293
 294 void cdv_hdmi_init(struct drm_device *dev,
 295                         struct psb_intel_mode_device *mode_dev, int reg)
 296 {
 297         struct psb_intel_encoder *psb_intel_encoder;
 298         struct psb_intel_connector *psb_intel_connector;
 299         struct drm_connector *connector;
 300         struct drm_encoder *encoder;
 301         struct mid_intel_hdmi_priv *hdmi_priv;
 302         int ddc_bus;
 303
 304         psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
 305                                     GFP_KERNEL);
 306
 307         if (!psb_intel_encoder)
 308                 return;
 309
 310         psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
 311                                       GFP_KERNEL);
 312
 313         if (!psb_intel_connector)
 314                 goto err_connector;
 315
 316         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 317
 318         if (!hdmi_priv)
 319                 goto err_priv;
 320
 321         connector = &psb_intel_connector->base;
 322         encoder = &psb_intel_encoder->base;
 323         drm_connector_init(dev, connector,
 324                            &cdv_hdmi_connector_funcs,
 325                            DRM_MODE_CONNECTOR_DVID);
 326
 327         drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 328                          DRM_MODE_ENCODER_TMDS);
 329
 330         psb_intel_connector_attach_encoder(psb_intel_connector,
 331                                            psb_intel_encoder);
 332         psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
 333         hdmi_priv->hdmi_reg = reg;
 334         hdmi_priv->has_hdmi_sink = false;
 335         psb_intel_encoder->dev_priv = hdmi_priv;
 336
 337         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 338         drm_connector_helper_add(connector,
 339                                  &cdv_hdmi_connector_helper_funcs);
 340         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 341         connector->interlace_allowed = false;
 342         connector->doublescan_allowed = false;
 343
 344         drm_object_attach_property(&connector->base,
 345                                       dev->mode_config.scaling_mode_property,
 346                                       DRM_MODE_SCALE_FULLSCREEN);
 347
 348         switch (reg) {
 349         case SDVOB:
 350                 ddc_bus = GPIOE;
 351                 psb_intel_encoder->ddi_select = DDI0_SELECT;
 352                 break;
 353         case SDVOC:
 354                 ddc_bus = GPIOD;
 355                 psb_intel_encoder->ddi_select = DDI1_SELECT;
 356                 break;
 357         default:
 358                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 359                 goto failed_ddc;
 360                 break;
 361         }
 362
 363         psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
 364                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 365
 366         if (!psb_intel_encoder->i2c_bus) {
 367                 dev_err(dev->dev, "No ddc adapter available!\n");
 368                 goto failed_ddc;
 369         }
 370
 371         hdmi_priv->hdmi_i2c_adapter =
 372                                 &(psb_intel_encoder->i2c_bus->adapter);
 373         hdmi_priv->dev = dev;
 374         drm_sysfs_connector_add(connector);
 375         return;
 376
 377 failed_ddc:
 378         drm_encoder_cleanup(encoder);
 379         drm_connector_cleanup(connector);
 380 err_priv:
 381         kfree(psb_intel_connector);
 382 err_connector:
 383         kfree(psb_intel_encoder);
 384 }