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
  27 #include <linux/pm_runtime.h>
  28
  29 #include <drm/drm.h>
  30 #include <drm/drm_crtc.h>
  31 #include <drm/drm_edid.h>
  32 #include <drm/drm_simple_kms_helper.h>
  33
  34 #include "cdv_device.h"
  35 #include "psb_drv.h"
  36 #include "psb_intel_drv.h"
  37 #include "psb_intel_reg.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 i2c_adapter *hdmi_i2c_adapter;   /* for control functions */
  57         struct drm_device *dev;
  58 };
  59
  60 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
  61                         struct drm_display_mode *mode,
  62                         struct drm_display_mode *adjusted_mode)
  63 {
  64         struct drm_device *dev = encoder->dev;
  65         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
  66         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  67         u32 hdmib;
  68         struct drm_crtc *crtc = encoder->crtc;
  69         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  70
  71         hdmib = (2 << 10);
  72
  73         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  74                 hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
  75         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  76                 hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
  77
  78         if (gma_crtc->pipe == 1)
  79                 hdmib |= HDMIB_PIPE_B_SELECT;
  80
  81         if (hdmi_priv->has_hdmi_audio) {
  82                 hdmib |= HDMI_AUDIO_ENABLE;
  83                 hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
  84         }
  85
  86         REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
  87         REG_READ(hdmi_priv->hdmi_reg);
  88 }
  89
  90 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
  91 {
  92         struct drm_device *dev = encoder->dev;
  93         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
  94         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  95         u32 hdmib;
  96
  97         hdmib = REG_READ(hdmi_priv->hdmi_reg);
  98
  99         if (mode != DRM_MODE_DPMS_ON)
 100                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 101         else
 102                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 103         REG_READ(hdmi_priv->hdmi_reg);
 104 }
 105
 106 static void cdv_hdmi_save(struct drm_connector *connector)
 107 {
 108         struct drm_device *dev = connector->dev;
 109         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 110         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 111
 112         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 113 }
 114
 115 static void cdv_hdmi_restore(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         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 122         REG_READ(hdmi_priv->hdmi_reg);
 123 }
 124
 125 static enum drm_connector_status cdv_hdmi_detect(
 126                                 struct drm_connector *connector, bool force)
 127 {
 128         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 129         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 130         struct edid *edid = NULL;
 131         enum drm_connector_status status = connector_status_disconnected;
 132
 133         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 134
 135         hdmi_priv->has_hdmi_sink = false;
 136         hdmi_priv->has_hdmi_audio = false;
 137         if (edid) {
 138                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 139                         status = connector_status_connected;
 140                         hdmi_priv->has_hdmi_sink =
 141                                                 drm_detect_hdmi_monitor(edid);
 142                         hdmi_priv->has_hdmi_audio =
 143                                                 drm_detect_monitor_audio(edid);
 144                 }
 145                 kfree(edid);
 146         }
 147         return status;
 148 }
 149
 150 static int cdv_hdmi_set_property(struct drm_connector *connector,
 151                                        struct drm_property *property,
 152                                        uint64_t value)
 153 {
 154         struct drm_encoder *encoder = connector->encoder;
 155
 156         if (!strcmp(property->name, "scaling mode") && encoder) {
 157                 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
 158                 bool centre;
 159                 uint64_t curValue;
 160
 161                 if (!crtc)
 162                         return -1;
 163
 164                 switch (value) {
 165                 case DRM_MODE_SCALE_FULLSCREEN:
 166                         break;
 167                 case DRM_MODE_SCALE_NO_SCALE:
 168                         break;
 169                 case DRM_MODE_SCALE_ASPECT:
 170                         break;
 171                 default:
 172                         return -1;
 173                 }
 174
 175                 if (drm_object_property_get_value(&connector->base,
 176                                                         property, &curValue))
 177                         return -1;
 178
 179                 if (curValue == value)
 180                         return 0;
 181
 182                 if (drm_object_property_set_value(&connector->base,
 183                                                         property, value))
 184                         return -1;
 185
 186                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 187                         (value == DRM_MODE_SCALE_NO_SCALE);
 188
 189                 if (crtc->saved_mode.hdisplay != 0 &&
 190                     crtc->saved_mode.vdisplay != 0) {
 191                         if (centre) {
 192                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 193                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
 194                                         return -1;
 195                         } else {
 196                                 const struct drm_encoder_helper_funcs *helpers
 197                                                     = encoder->helper_private;
 198                                 helpers->mode_set(encoder, &crtc->saved_mode,
 199                                              &crtc->saved_adjusted_mode);
 200                         }
 201                 }
 202         }
 203         return 0;
 204 }
 205
 206 /*
 207  * Return the list of HDMI DDC modes if available.
 208  */
 209 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 210 {
 211         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 212         struct edid *edid = NULL;
 213         int ret = 0;
 214
 215         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 216         if (edid) {
 217                 drm_connector_update_edid_property(connector, edid);
 218                 ret = drm_add_edid_modes(connector, edid);
 219                 kfree(edid);
 220         }
 221         return ret;
 222 }
 223
 224 static enum drm_mode_status cdv_hdmi_mode_valid(struct drm_connector *connector,
 225                                  struct drm_display_mode *mode)
 226 {
 227         if (mode->clock > 165000)
 228                 return MODE_CLOCK_HIGH;
 229         if (mode->clock < 20000)
 230                 return MODE_CLOCK_HIGH;
 231
 232         /* just in case */
 233         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 234                 return MODE_NO_DBLESCAN;
 235
 236         /* just in case */
 237         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 238                 return MODE_NO_INTERLACE;
 239
 240         return MODE_OK;
 241 }
 242
 243 static void cdv_hdmi_destroy(struct drm_connector *connector)
 244 {
 245         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 246
 247         psb_intel_i2c_destroy(gma_encoder->i2c_bus);
 248         drm_connector_unregister(connector);
 249         drm_connector_cleanup(connector);
 250         kfree(connector);
 251 }
 252
 253 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 254         .dpms = cdv_hdmi_dpms,
 255         .prepare = gma_encoder_prepare,
 256         .mode_set = cdv_hdmi_mode_set,
 257         .commit = gma_encoder_commit,
 258 };
 259
 260 static const struct drm_connector_helper_funcs
 261                                         cdv_hdmi_connector_helper_funcs = {
 262         .get_modes = cdv_hdmi_get_modes,
 263         .mode_valid = cdv_hdmi_mode_valid,
 264         .best_encoder = gma_best_encoder,
 265 };
 266
 267 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 268         .dpms = drm_helper_connector_dpms,
 269         .detect = cdv_hdmi_detect,
 270         .fill_modes = drm_helper_probe_single_connector_modes,
 271         .set_property = cdv_hdmi_set_property,
 272         .destroy = cdv_hdmi_destroy,
 273 };
 274
 275 void cdv_hdmi_init(struct drm_device *dev,
 276                         struct psb_intel_mode_device *mode_dev, int reg)
 277 {
 278         struct gma_encoder *gma_encoder;
 279         struct gma_connector *gma_connector;
 280         struct drm_connector *connector;
 281         struct drm_encoder *encoder;
 282         struct mid_intel_hdmi_priv *hdmi_priv;
 283         int ddc_bus;
 284
 285         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 286
 287         if (!gma_encoder)
 288                 return;
 289
 290         gma_connector = kzalloc(sizeof(struct gma_connector),
 291                                       GFP_KERNEL);
 292
 293         if (!gma_connector)
 294                 goto err_connector;
 295
 296         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 297
 298         if (!hdmi_priv)
 299                 goto err_priv;
 300
 301         connector = &gma_connector->base;
 302         connector->polled = DRM_CONNECTOR_POLL_HPD;
 303         gma_connector->save = cdv_hdmi_save;
 304         gma_connector->restore = cdv_hdmi_restore;
 305
 306         encoder = &gma_encoder->base;
 307         drm_connector_init(dev, connector,
 308                            &cdv_hdmi_connector_funcs,
 309                            DRM_MODE_CONNECTOR_DVID);
 310
 311         drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
 312
 313         gma_connector_attach_encoder(gma_connector, gma_encoder);
 314         gma_encoder->type = INTEL_OUTPUT_HDMI;
 315         hdmi_priv->hdmi_reg = reg;
 316         hdmi_priv->has_hdmi_sink = false;
 317         gma_encoder->dev_priv = hdmi_priv;
 318
 319         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 320         drm_connector_helper_add(connector,
 321                                  &cdv_hdmi_connector_helper_funcs);
 322         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 323         connector->interlace_allowed = false;
 324         connector->doublescan_allowed = false;
 325
 326         drm_object_attach_property(&connector->base,
 327                                       dev->mode_config.scaling_mode_property,
 328                                       DRM_MODE_SCALE_FULLSCREEN);
 329
 330         switch (reg) {
 331         case SDVOB:
 332                 ddc_bus = GPIOE;
 333                 gma_encoder->ddi_select = DDI0_SELECT;
 334                 break;
 335         case SDVOC:
 336                 ddc_bus = GPIOD;
 337                 gma_encoder->ddi_select = DDI1_SELECT;
 338                 break;
 339         default:
 340                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 341                 goto failed_ddc;
 342                 break;
 343         }
 344
 345         gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
 346                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 347
 348         if (!gma_encoder->i2c_bus) {
 349                 dev_err(dev->dev, "No ddc adapter available!\n");
 350                 goto failed_ddc;
 351         }
 352
 353         hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
 354         hdmi_priv->dev = dev;
 355         drm_connector_register(connector);
 356         return;
 357
 358 failed_ddc:
 359         drm_encoder_cleanup(encoder);
 360         drm_connector_cleanup(connector);
 361 err_priv:
 362         kfree(gma_connector);
 363 err_connector:
 364         kfree(gma_encoder);
 365 }