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 gma_encoder *gma_encoder = to_gma_encoder(encoder);
  68         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  69         u32 hdmib;
  70         struct drm_crtc *crtc = encoder->crtc;
  71         struct gma_crtc *gma_crtc = to_gma_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 (gma_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 gma_encoder *gma_encoder = to_gma_encoder(encoder);
 103         struct mid_intel_hdmi_priv *hdmi_priv = gma_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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
 119         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 120
 121         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 122 }
 123
 124 static void cdv_hdmi_restore(struct drm_connector *connector)
 125 {
 126         struct drm_device *dev = connector->dev;
 127         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 128         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 129
 130         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 131         REG_READ(hdmi_priv->hdmi_reg);
 132 }
 133
 134 static enum drm_connector_status cdv_hdmi_detect(
 135                                 struct drm_connector *connector, bool force)
 136 {
 137         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 138         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 139         struct edid *edid = NULL;
 140         enum drm_connector_status status = connector_status_disconnected;
 141
 142         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 143
 144         hdmi_priv->has_hdmi_sink = false;
 145         hdmi_priv->has_hdmi_audio = false;
 146         if (edid) {
 147                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 148                         status = connector_status_connected;
 149                         hdmi_priv->has_hdmi_sink =
 150                                                 drm_detect_hdmi_monitor(edid);
 151                         hdmi_priv->has_hdmi_audio =
 152                                                 drm_detect_monitor_audio(edid);
 153                 }
 154                 kfree(edid);
 155         }
 156         return status;
 157 }
 158
 159 static int cdv_hdmi_set_property(struct drm_connector *connector,
 160                                        struct drm_property *property,
 161                                        uint64_t value)
 162 {
 163         struct drm_encoder *encoder = connector->encoder;
 164
 165         if (!strcmp(property->name, "scaling mode") && encoder) {
 166                 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
 167                 bool centre;
 168                 uint64_t curValue;
 169
 170                 if (!crtc)
 171                         return -1;
 172
 173                 switch (value) {
 174                 case DRM_MODE_SCALE_FULLSCREEN:
 175                         break;
 176                 case DRM_MODE_SCALE_NO_SCALE:
 177                         break;
 178                 case DRM_MODE_SCALE_ASPECT:
 179                         break;
 180                 default:
 181                         return -1;
 182                 }
 183
 184                 if (drm_object_property_get_value(&connector->base,
 185                                                         property, &curValue))
 186                         return -1;
 187
 188                 if (curValue == value)
 189                         return 0;
 190
 191                 if (drm_object_property_set_value(&connector->base,
 192                                                         property, value))
 193                         return -1;
 194
 195                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 196                         (value == DRM_MODE_SCALE_NO_SCALE);
 197
 198                 if (crtc->saved_mode.hdisplay != 0 &&
 199                     crtc->saved_mode.vdisplay != 0) {
 200                         if (centre) {
 201                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 202                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 203                                         return -1;
 204                         } else {
 205                                 struct drm_encoder_helper_funcs *helpers
 206                                                     = encoder->helper_private;
 207                                 helpers->mode_set(encoder, &crtc->saved_mode,
 208                                              &crtc->saved_adjusted_mode);
 209                         }
 210                 }
 211         }
 212         return 0;
 213 }
 214
 215 /*
 216  * Return the list of HDMI DDC modes if available.
 217  */
 218 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 219 {
 220         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 221         struct edid *edid = NULL;
 222         int ret = 0;
 223
 224         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 225         if (edid) {
 226                 drm_mode_connector_update_edid_property(connector, edid);
 227                 ret = drm_add_edid_modes(connector, edid);
 228                 kfree(edid);
 229         }
 230         return ret;
 231 }
 232
 233 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 234                                  struct drm_display_mode *mode)
 235 {
 236         if (mode->clock > 165000)
 237                 return MODE_CLOCK_HIGH;
 238         if (mode->clock < 20000)
 239                 return MODE_CLOCK_HIGH;
 240
 241         /* just in case */
 242         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 243                 return MODE_NO_DBLESCAN;
 244
 245         /* just in case */
 246         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 247                 return MODE_NO_INTERLACE;
 248
 249         return MODE_OK;
 250 }
 251
 252 static void cdv_hdmi_destroy(struct drm_connector *connector)
 253 {
 254         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 255
 256         if (gma_encoder->i2c_bus)
 257                 psb_intel_i2c_destroy(gma_encoder->i2c_bus);
 258         drm_sysfs_connector_remove(connector);
 259         drm_connector_cleanup(connector);
 260         kfree(connector);
 261 }
 262
 263 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 264         .dpms = cdv_hdmi_dpms,
 265         .mode_fixup = cdv_hdmi_mode_fixup,
 266         .prepare = gma_encoder_prepare,
 267         .mode_set = cdv_hdmi_mode_set,
 268         .commit = gma_encoder_commit,
 269 };
 270
 271 static const struct drm_connector_helper_funcs
 272                                         cdv_hdmi_connector_helper_funcs = {
 273         .get_modes = cdv_hdmi_get_modes,
 274         .mode_valid = cdv_hdmi_mode_valid,
 275         .best_encoder = gma_best_encoder,
 276 };
 277
 278 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 279         .dpms = drm_helper_connector_dpms,
 280         .save = cdv_hdmi_save,
 281         .restore = cdv_hdmi_restore,
 282         .detect = cdv_hdmi_detect,
 283         .fill_modes = drm_helper_probe_single_connector_modes,
 284         .set_property = cdv_hdmi_set_property,
 285         .destroy = cdv_hdmi_destroy,
 286 };
 287
 288 void cdv_hdmi_init(struct drm_device *dev,
 289                         struct psb_intel_mode_device *mode_dev, int reg)
 290 {
 291         struct gma_encoder *gma_encoder;
 292         struct gma_connector *gma_connector;
 293         struct drm_connector *connector;
 294         struct drm_encoder *encoder;
 295         struct mid_intel_hdmi_priv *hdmi_priv;
 296         int ddc_bus;
 297
 298         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 299
 300         if (!gma_encoder)
 301                 return;
 302
 303         gma_connector = kzalloc(sizeof(struct gma_connector),
 304                                       GFP_KERNEL);
 305
 306         if (!gma_connector)
 307                 goto err_connector;
 308
 309         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 310
 311         if (!hdmi_priv)
 312                 goto err_priv;
 313
 314         connector = &gma_connector->base;
 315         connector->polled = DRM_CONNECTOR_POLL_HPD;
 316         encoder = &gma_encoder->base;
 317         drm_connector_init(dev, connector,
 318                            &cdv_hdmi_connector_funcs,
 319                            DRM_MODE_CONNECTOR_DVID);
 320
 321         drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 322                          DRM_MODE_ENCODER_TMDS);
 323
 324         gma_connector_attach_encoder(gma_connector, gma_encoder);
 325         gma_encoder->type = INTEL_OUTPUT_HDMI;
 326         hdmi_priv->hdmi_reg = reg;
 327         hdmi_priv->has_hdmi_sink = false;
 328         gma_encoder->dev_priv = hdmi_priv;
 329
 330         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 331         drm_connector_helper_add(connector,
 332                                  &cdv_hdmi_connector_helper_funcs);
 333         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 334         connector->interlace_allowed = false;
 335         connector->doublescan_allowed = false;
 336
 337         drm_object_attach_property(&connector->base,
 338                                       dev->mode_config.scaling_mode_property,
 339                                       DRM_MODE_SCALE_FULLSCREEN);
 340
 341         switch (reg) {
 342         case SDVOB:
 343                 ddc_bus = GPIOE;
 344                 gma_encoder->ddi_select = DDI0_SELECT;
 345                 break;
 346         case SDVOC:
 347                 ddc_bus = GPIOD;
 348                 gma_encoder->ddi_select = DDI1_SELECT;
 349                 break;
 350         default:
 351                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 352                 goto failed_ddc;
 353                 break;
 354         }
 355
 356         gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
 357                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 358
 359         if (!gma_encoder->i2c_bus) {
 360                 dev_err(dev->dev, "No ddc adapter available!\n");
 361                 goto failed_ddc;
 362         }
 363
 364         hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
 365         hdmi_priv->dev = dev;
 366         drm_sysfs_connector_add(connector);
 367         return;
 368
 369 failed_ddc:
 370         drm_encoder_cleanup(encoder);
 371         drm_connector_cleanup(connector);
 372 err_priv:
 373         kfree(gma_connector);
 374 err_connector:
 375         kfree(gma_encoder);
 376 }