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                                   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 psb_intel_connector *psb_intel_connector =
 143                                         to_psb_intel_connector(connector);
 144         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 145         struct edid *edid = NULL;
 146         enum drm_connector_status status = connector_status_disconnected;
 147
 148         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 149
 150         hdmi_priv->has_hdmi_sink = false;
 151         hdmi_priv->has_hdmi_audio = false;
 152         if (edid) {
 153                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 154                         status = connector_status_connected;
 155                         hdmi_priv->has_hdmi_sink =
 156                                                 drm_detect_hdmi_monitor(edid);
 157                         hdmi_priv->has_hdmi_audio =
 158                                                 drm_detect_monitor_audio(edid);
 159                 }
 160
 161                 psb_intel_connector->base.display_info.raw_edid = NULL;
 162                 kfree(edid);
 163         }
 164         return status;
 165 }
 166
 167 static int cdv_hdmi_set_property(struct drm_connector *connector,
 168                                        struct drm_property *property,
 169                                        uint64_t value)
 170 {
 171         struct drm_encoder *encoder = connector->encoder;
 172
 173         if (!strcmp(property->name, "scaling mode") && encoder) {
 174                 struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
 175                 bool centre;
 176                 uint64_t curValue;
 177
 178                 if (!crtc)
 179                         return -1;
 180
 181                 switch (value) {
 182                 case DRM_MODE_SCALE_FULLSCREEN:
 183                         break;
 184                 case DRM_MODE_SCALE_NO_SCALE:
 185                         break;
 186                 case DRM_MODE_SCALE_ASPECT:
 187                         break;
 188                 default:
 189                         return -1;
 190                 }
 191
 192                 if (drm_connector_property_get_value(connector,
 193                                                         property, &curValue))
 194                         return -1;
 195
 196                 if (curValue == value)
 197                         return 0;
 198
 199                 if (drm_connector_property_set_value(connector,
 200                                                         property, value))
 201                         return -1;
 202
 203                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 204                         (value == DRM_MODE_SCALE_NO_SCALE);
 205
 206                 if (crtc->saved_mode.hdisplay != 0 &&
 207                     crtc->saved_mode.vdisplay != 0) {
 208                         if (centre) {
 209                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 210                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 211                                         return -1;
 212                         } else {
 213                                 struct drm_encoder_helper_funcs *helpers
 214                                                     = encoder->helper_private;
 215                                 helpers->mode_set(encoder, &crtc->saved_mode,
 216                                              &crtc->saved_adjusted_mode);
 217                         }
 218                 }
 219         }
 220         return 0;
 221 }
 222
 223 /*
 224  * Return the list of HDMI DDC modes if available.
 225  */
 226 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 227 {
 228         struct psb_intel_encoder *psb_intel_encoder =
 229                                         psb_intel_attached_encoder(connector);
 230         struct edid *edid = NULL;
 231         int ret = 0;
 232
 233         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 234         if (edid) {
 235                 drm_mode_connector_update_edid_property(connector, edid);
 236                 ret = drm_add_edid_modes(connector, edid);
 237                 kfree(edid);
 238         }
 239         return ret;
 240 }
 241
 242 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 243                                  struct drm_display_mode *mode)
 244 {
 245         if (mode->clock > 165000)
 246                 return MODE_CLOCK_HIGH;
 247         if (mode->clock < 20000)
 248                 return MODE_CLOCK_HIGH;
 249
 250         /* just in case */
 251         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 252                 return MODE_NO_DBLESCAN;
 253
 254         /* just in case */
 255         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 256                 return MODE_NO_INTERLACE;
 257
 258         return MODE_OK;
 259 }
 260
 261 static void cdv_hdmi_destroy(struct drm_connector *connector)
 262 {
 263         struct psb_intel_encoder *psb_intel_encoder =
 264                                         psb_intel_attached_encoder(connector);
 265
 266         if (psb_intel_encoder->i2c_bus)
 267                 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
 268         drm_sysfs_connector_remove(connector);
 269         drm_connector_cleanup(connector);
 270         kfree(connector);
 271 }
 272
 273 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 274         .dpms = cdv_hdmi_dpms,
 275         .mode_fixup = cdv_hdmi_mode_fixup,
 276         .prepare = psb_intel_encoder_prepare,
 277         .mode_set = cdv_hdmi_mode_set,
 278         .commit = psb_intel_encoder_commit,
 279 };
 280
 281 static const struct drm_connector_helper_funcs
 282                                         cdv_hdmi_connector_helper_funcs = {
 283         .get_modes = cdv_hdmi_get_modes,
 284         .mode_valid = cdv_hdmi_mode_valid,
 285         .best_encoder = psb_intel_best_encoder,
 286 };
 287
 288 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 289         .dpms = drm_helper_connector_dpms,
 290         .save = cdv_hdmi_save,
 291         .restore = cdv_hdmi_restore,
 292         .detect = cdv_hdmi_detect,
 293         .fill_modes = drm_helper_probe_single_connector_modes,
 294         .set_property = cdv_hdmi_set_property,
 295         .destroy = cdv_hdmi_destroy,
 296 };
 297
 298 void cdv_hdmi_init(struct drm_device *dev,
 299                         struct psb_intel_mode_device *mode_dev, int reg)
 300 {
 301         struct psb_intel_encoder *psb_intel_encoder;
 302         struct psb_intel_connector *psb_intel_connector;
 303         struct drm_connector *connector;
 304         struct drm_encoder *encoder;
 305         struct mid_intel_hdmi_priv *hdmi_priv;
 306         int ddc_bus;
 307
 308         psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
 309                                     GFP_KERNEL);
 310
 311         if (!psb_intel_encoder)
 312                 return;
 313
 314         psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
 315                                       GFP_KERNEL);
 316
 317         if (!psb_intel_connector)
 318                 goto err_connector;
 319
 320         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 321
 322         if (!hdmi_priv)
 323                 goto err_priv;
 324
 325         connector = &psb_intel_connector->base;
 326         encoder = &psb_intel_encoder->base;
 327         drm_connector_init(dev, connector,
 328                            &cdv_hdmi_connector_funcs,
 329                            DRM_MODE_CONNECTOR_DVID);
 330
 331         drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 332                          DRM_MODE_ENCODER_TMDS);
 333
 334         psb_intel_connector_attach_encoder(psb_intel_connector,
 335                                            psb_intel_encoder);
 336         psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
 337         hdmi_priv->hdmi_reg = reg;
 338         hdmi_priv->has_hdmi_sink = false;
 339         psb_intel_encoder->dev_priv = hdmi_priv;
 340
 341         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 342         drm_connector_helper_add(connector,
 343                                  &cdv_hdmi_connector_helper_funcs);
 344         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 345         connector->interlace_allowed = false;
 346         connector->doublescan_allowed = false;
 347
 348         drm_connector_attach_property(connector,
 349                                       dev->mode_config.scaling_mode_property,
 350                                       DRM_MODE_SCALE_FULLSCREEN);
 351
 352         switch (reg) {
 353         case SDVOB:
 354                 ddc_bus = GPIOE;
 355                 break;
 356         case SDVOC:
 357                 ddc_bus = GPIOD;
 358                 break;
 359         default:
 360                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 361                 goto failed_ddc;
 362                 break;
 363         }
 364
 365         psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
 366                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 367
 368         if (!psb_intel_encoder->i2c_bus) {
 369                 dev_err(dev->dev, "No ddc adapter available!\n");
 370                 goto failed_ddc;
 371         }
 372
 373         hdmi_priv->hdmi_i2c_adapter =
 374                                 &(psb_intel_encoder->i2c_bus->adapter);
 375         hdmi_priv->dev = dev;
 376         drm_sysfs_connector_add(connector);
 377         return;
 378
 379 failed_ddc:
 380         drm_encoder_cleanup(encoder);
 381         drm_connector_cleanup(connector);
 382 err_priv:
 383         kfree(psb_intel_connector);
 384 err_connector:
 385         kfree(psb_intel_encoder);
 386 }