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 <linux/pm_runtime.h>
  38
  39 /* hdmi control bits */
  40 #define HDMI_NULL_PACKETS_DURING_VSYNC  (1 << 9)
  41 #define HDMI_BORDER_ENABLE              (1 << 7)
  42 #define HDMI_AUDIO_ENABLE               (1 << 6)
  43 #define HDMI_VSYNC_ACTIVE_HIGH          (1 << 4)
  44 #define HDMI_HSYNC_ACTIVE_HIGH          (1 << 3)
  45 /* hdmi-b control bits */
  46 #define HDMIB_PIPE_B_SELECT             (1 << 30)
  47
  48
  49 struct mid_intel_hdmi_priv {
  50         u32 hdmi_reg;
  51         u32 save_HDMIB;
  52         bool has_hdmi_sink;
  53         bool has_hdmi_audio;
  54         /* Should set this when detect hotplug */
  55         bool hdmi_device_connected;
  56         struct mdfld_hdmi_i2c *i2c_bus;
  57         struct i2c_adapter *hdmi_i2c_adapter;   /* for control functions */
  58         struct drm_device *dev;
  59 };
  60
  61 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
  62                         struct drm_display_mode *mode,
  63                         struct drm_display_mode *adjusted_mode)
  64 {
  65         struct drm_device *dev = encoder->dev;
  66         struct psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
  67         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
  68         u32 hdmib;
  69         struct drm_crtc *crtc = encoder->crtc;
  70         struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
  71
  72         hdmib = (2 << 10);
  73
  74         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  75                 hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
  76         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  77                 hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
  78
  79         if (intel_crtc->pipe == 1)
  80                 hdmib |= HDMIB_PIPE_B_SELECT;
  81
  82         if (hdmi_priv->has_hdmi_audio) {
  83                 hdmib |= HDMI_AUDIO_ENABLE;
  84                 hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
  85         }
  86
  87         REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
  88         REG_READ(hdmi_priv->hdmi_reg);
  89 }
  90
  91 static bool cdv_hdmi_mode_fixup(struct drm_encoder *encoder,
  92                                   struct drm_display_mode *mode,
  93                                   struct drm_display_mode *adjusted_mode)
  94 {
  95         return true;
  96 }
  97
  98 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
  99 {
 100         struct drm_device *dev = encoder->dev;
 101         struct psb_intel_encoder *psb_intel_encoder =
 102                                                 to_psb_intel_encoder(encoder);
 103         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 104         u32 hdmib;
 105
 106         hdmib = REG_READ(hdmi_priv->hdmi_reg);
 107
 108         if (mode != DRM_MODE_DPMS_ON)
 109                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 110         else
 111                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 112         REG_READ(hdmi_priv->hdmi_reg);
 113 }
 114
 115 static void cdv_hdmi_save(struct drm_connector *connector)
 116 {
 117         struct drm_device *dev = connector->dev;
 118         struct psb_intel_encoder *psb_intel_encoder =
 119                                         psb_intel_attached_encoder(connector);
 120         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 121
 122         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 123 }
 124
 125 static void cdv_hdmi_restore(struct drm_connector *connector)
 126 {
 127         struct drm_device *dev = connector->dev;
 128         struct psb_intel_encoder *psb_intel_encoder =
 129                                         psb_intel_attached_encoder(connector);
 130         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 131
 132         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 133         REG_READ(hdmi_priv->hdmi_reg);
 134 }
 135
 136 static enum drm_connector_status cdv_hdmi_detect(
 137                                 struct drm_connector *connector, bool force)
 138 {
 139         struct psb_intel_encoder *psb_intel_encoder =
 140                                         psb_intel_attached_encoder(connector);
 141         struct psb_intel_connector *psb_intel_connector =
 142                                         to_psb_intel_connector(connector);
 143         struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 144         struct edid *edid = NULL;
 145         enum drm_connector_status status = connector_status_disconnected;
 146
 147         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 148
 149         hdmi_priv->has_hdmi_sink = false;
 150         hdmi_priv->has_hdmi_audio = false;
 151         if (edid) {
 152                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 153                         status = connector_status_connected;
 154                         hdmi_priv->has_hdmi_sink =
 155                                                 drm_detect_hdmi_monitor(edid);
 156                         hdmi_priv->has_hdmi_audio =
 157                                                 drm_detect_monitor_audio(edid);
 158                 }
 159
 160                 psb_intel_connector->base.display_info.raw_edid = NULL;
 161                 kfree(edid);
 162         }
 163         return status;
 164 }
 165
 166 static int cdv_hdmi_set_property(struct drm_connector *connector,
 167                                        struct drm_property *property,
 168                                        uint64_t value)
 169 {
 170         struct drm_encoder *encoder = connector->encoder;
 171
 172         if (!strcmp(property->name, "scaling mode") && encoder) {
 173                 struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
 174                 bool centre;
 175                 uint64_t curValue;
 176
 177                 if (!crtc)
 178                         return -1;
 179
 180                 switch (value) {
 181                 case DRM_MODE_SCALE_FULLSCREEN:
 182                         break;
 183                 case DRM_MODE_SCALE_NO_SCALE:
 184                         break;
 185                 case DRM_MODE_SCALE_ASPECT:
 186                         break;
 187                 default:
 188                         return -1;
 189                 }
 190
 191                 if (drm_connector_property_get_value(connector,
 192                                                         property, &curValue))
 193                         return -1;
 194
 195                 if (curValue == value)
 196                         return 0;
 197
 198                 if (drm_connector_property_set_value(connector,
 199                                                         property, value))
 200                         return -1;
 201
 202                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 203                         (value == DRM_MODE_SCALE_NO_SCALE);
 204
 205                 if (crtc->saved_mode.hdisplay != 0 &&
 206                     crtc->saved_mode.vdisplay != 0) {
 207                         if (centre) {
 208                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 209                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 210                                         return -1;
 211                         } else {
 212                                 struct drm_encoder_helper_funcs *helpers
 213                                                     = encoder->helper_private;
 214                                 helpers->mode_set(encoder, &crtc->saved_mode,
 215                                              &crtc->saved_adjusted_mode);
 216                         }
 217                 }
 218         }
 219         return 0;
 220 }
 221
 222 /*
 223  * Return the list of HDMI DDC modes if available.
 224  */
 225 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 226 {
 227         struct psb_intel_encoder *psb_intel_encoder =
 228                                         psb_intel_attached_encoder(connector);
 229         struct edid *edid = NULL;
 230         int ret = 0;
 231
 232         edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 233         if (edid) {
 234                 drm_mode_connector_update_edid_property(connector, edid);
 235                 ret = drm_add_edid_modes(connector, edid);
 236                 kfree(edid);
 237         }
 238         return ret;
 239 }
 240
 241 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 242                                  struct drm_display_mode *mode)
 243 {
 244         struct drm_psb_private *dev_priv = connector->dev->dev_private;
 245
 246         if (mode->clock > 165000)
 247                 return MODE_CLOCK_HIGH;
 248         if (mode->clock < 20000)
 249                 return MODE_CLOCK_HIGH;
 250
 251         /* just in case */
 252         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 253                 return MODE_NO_DBLESCAN;
 254
 255         /* just in case */
 256         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 257                 return MODE_NO_INTERLACE;
 258
 259         /* We assume worst case scenario of 32 bpp here, since we don't know */
 260         if ((ALIGN(mode->hdisplay * 4, 64) * mode->vdisplay) >
 261             dev_priv->vram_stolen_size)
 262                 return MODE_MEM;
 263
 264         return MODE_OK;
 265 }
 266
 267 static void cdv_hdmi_destroy(struct drm_connector *connector)
 268 {
 269         struct psb_intel_encoder *psb_intel_encoder =
 270                                         psb_intel_attached_encoder(connector);
 271
 272         if (psb_intel_encoder->i2c_bus)
 273                 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
 274         drm_sysfs_connector_remove(connector);
 275         drm_connector_cleanup(connector);
 276         kfree(connector);
 277 }
 278
 279 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 280         .dpms = cdv_hdmi_dpms,
 281         .mode_fixup = cdv_hdmi_mode_fixup,
 282         .prepare = psb_intel_encoder_prepare,
 283         .mode_set = cdv_hdmi_mode_set,
 284         .commit = psb_intel_encoder_commit,
 285 };
 286
 287 static const struct drm_connector_helper_funcs
 288                                         cdv_hdmi_connector_helper_funcs = {
 289         .get_modes = cdv_hdmi_get_modes,
 290         .mode_valid = cdv_hdmi_mode_valid,
 291         .best_encoder = psb_intel_best_encoder,
 292 };
 293
 294 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 295         .dpms = drm_helper_connector_dpms,
 296         .save = cdv_hdmi_save,
 297         .restore = cdv_hdmi_restore,
 298         .detect = cdv_hdmi_detect,
 299         .fill_modes = drm_helper_probe_single_connector_modes,
 300         .set_property = cdv_hdmi_set_property,
 301         .destroy = cdv_hdmi_destroy,
 302 };
 303
 304 void cdv_hdmi_init(struct drm_device *dev,
 305                         struct psb_intel_mode_device *mode_dev, int reg)
 306 {
 307         struct psb_intel_encoder *psb_intel_encoder;
 308         struct psb_intel_connector *psb_intel_connector;
 309         struct drm_connector *connector;
 310         struct drm_encoder *encoder;
 311         struct mid_intel_hdmi_priv *hdmi_priv;
 312         int ddc_bus;
 313
 314         psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
 315                                     GFP_KERNEL);
 316
 317         if (!psb_intel_encoder)
 318                 return;
 319
 320         psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
 321                                       GFP_KERNEL);
 322
 323         if (!psb_intel_connector)
 324                 goto err_connector;
 325
 326         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 327
 328         if (!hdmi_priv)
 329                 goto err_priv;
 330
 331         connector = &psb_intel_connector->base;
 332         encoder = &psb_intel_encoder->base;
 333         drm_connector_init(dev, connector,
 334                            &cdv_hdmi_connector_funcs,
 335                            DRM_MODE_CONNECTOR_DVID);
 336
 337         drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 338                          DRM_MODE_ENCODER_TMDS);
 339
 340         psb_intel_connector_attach_encoder(psb_intel_connector,
 341                                            psb_intel_encoder);
 342         psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
 343         hdmi_priv->hdmi_reg = reg;
 344         hdmi_priv->has_hdmi_sink = false;
 345         psb_intel_encoder->dev_priv = hdmi_priv;
 346
 347         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 348         drm_connector_helper_add(connector,
 349                                  &cdv_hdmi_connector_helper_funcs);
 350         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 351         connector->interlace_allowed = false;
 352         connector->doublescan_allowed = false;
 353
 354         drm_connector_attach_property(connector,
 355                                       dev->mode_config.scaling_mode_property,
 356                                       DRM_MODE_SCALE_FULLSCREEN);
 357
 358         switch (reg) {
 359         case SDVOB:
 360                 ddc_bus = GPIOE;
 361                 break;
 362         case SDVOC:
 363                 ddc_bus = GPIOD;
 364                 break;
 365         default:
 366                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 367                 goto failed_ddc;
 368                 break;
 369         }
 370
 371         psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
 372                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 373
 374         if (!psb_intel_encoder->i2c_bus) {
 375                 dev_err(dev->dev, "No ddc adapter available!\n");
 376                 goto failed_ddc;
 377         }
 378
 379         hdmi_priv->hdmi_i2c_adapter =
 380                                 &(psb_intel_encoder->i2c_bus->adapter);
 381         hdmi_priv->dev = dev;
 382         drm_sysfs_connector_add(connector);
 383         return;
 384
 385 failed_ddc:
 386         drm_encoder_cleanup(encoder);
 387         drm_connector_cleanup(connector);
 388 err_priv:
 389         kfree(psb_intel_connector);
 390 err_connector:
 391         kfree(psb_intel_encoder);
 392 }