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 <linux/pm_runtime.h>
  31
  32 #include <drm/drm.h>
  33 #include <drm/drm_crtc.h>
  34 #include <drm/drm_edid.h>
  35 #include <drm/drm_simple_kms_helper.h>
  36
  37 #include "cdv_device.h"
  38 #include "psb_drv.h"
  39 #include "psb_intel_drv.h"
  40 #include "psb_intel_reg.h"
  41
  42 /* hdmi control bits */
  43 #define HDMI_NULL_PACKETS_DURING_VSYNC  (1 << 9)
  44 #define HDMI_BORDER_ENABLE              (1 << 7)
  45 #define HDMI_AUDIO_ENABLE               (1 << 6)
  46 #define HDMI_VSYNC_ACTIVE_HIGH          (1 << 4)
  47 #define HDMI_HSYNC_ACTIVE_HIGH          (1 << 3)
  48 /* hdmi-b control bits */
  49 #define HDMIB_PIPE_B_SELECT             (1 << 30)
  50
  51
  52 struct mid_intel_hdmi_priv {
  53         u32 hdmi_reg;
  54         u32 save_HDMIB;
  55         bool has_hdmi_sink;
  56         bool has_hdmi_audio;
  57         /* Should set this when detect hotplug */
  58         bool hdmi_device_connected;
  59         struct mdfld_hdmi_i2c *i2c_bus;
  60         struct i2c_adapter *hdmi_i2c_adapter;   /* for control functions */
  61         struct drm_device *dev;
  62 };
  63
  64 static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
  65                         struct drm_display_mode *mode,
  66                         struct drm_display_mode *adjusted_mode)
  67 {
  68         struct drm_device *dev = encoder->dev;
  69         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
  70         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  71         u32 hdmib;
  72         struct drm_crtc *crtc = encoder->crtc;
  73         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
  74
  75         hdmib = (2 << 10);
  76
  77         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  78                 hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
  79         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  80                 hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
  81
  82         if (gma_crtc->pipe == 1)
  83                 hdmib |= HDMIB_PIPE_B_SELECT;
  84
  85         if (hdmi_priv->has_hdmi_audio) {
  86                 hdmib |= HDMI_AUDIO_ENABLE;
  87                 hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
  88         }
  89
  90         REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
  91         REG_READ(hdmi_priv->hdmi_reg);
  92 }
  93
  94 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
  95 {
  96         struct drm_device *dev = encoder->dev;
  97         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
  98         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  99         u32 hdmib;
 100
 101         hdmib = REG_READ(hdmi_priv->hdmi_reg);
 102
 103         if (mode != DRM_MODE_DPMS_ON)
 104                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 105         else
 106                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 107         REG_READ(hdmi_priv->hdmi_reg);
 108 }
 109
 110 static void cdv_hdmi_save(struct drm_connector *connector)
 111 {
 112         struct drm_device *dev = connector->dev;
 113         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 114         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 115
 116         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 117 }
 118
 119 static void cdv_hdmi_restore(struct drm_connector *connector)
 120 {
 121         struct drm_device *dev = connector->dev;
 122         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 123         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 124
 125         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 126         REG_READ(hdmi_priv->hdmi_reg);
 127 }
 128
 129 static enum drm_connector_status cdv_hdmi_detect(
 130                                 struct drm_connector *connector, bool force)
 131 {
 132         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 133         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 134         struct edid *edid = NULL;
 135         enum drm_connector_status status = connector_status_disconnected;
 136
 137         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 138
 139         hdmi_priv->has_hdmi_sink = false;
 140         hdmi_priv->has_hdmi_audio = false;
 141         if (edid) {
 142                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 143                         status = connector_status_connected;
 144                         hdmi_priv->has_hdmi_sink =
 145                                                 drm_detect_hdmi_monitor(edid);
 146                         hdmi_priv->has_hdmi_audio =
 147                                                 drm_detect_monitor_audio(edid);
 148                 }
 149                 kfree(edid);
 150         }
 151         return status;
 152 }
 153
 154 static int cdv_hdmi_set_property(struct drm_connector *connector,
 155                                        struct drm_property *property,
 156                                        uint64_t value)
 157 {
 158         struct drm_encoder *encoder = connector->encoder;
 159
 160         if (!strcmp(property->name, "scaling mode") && encoder) {
 161                 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
 162                 bool centre;
 163                 uint64_t curValue;
 164
 165                 if (!crtc)
 166                         return -1;
 167
 168                 switch (value) {
 169                 case DRM_MODE_SCALE_FULLSCREEN:
 170                         break;
 171                 case DRM_MODE_SCALE_NO_SCALE:
 172                         break;
 173                 case DRM_MODE_SCALE_ASPECT:
 174                         break;
 175                 default:
 176                         return -1;
 177                 }
 178
 179                 if (drm_object_property_get_value(&connector->base,
 180                                                         property, &curValue))
 181                         return -1;
 182
 183                 if (curValue == value)
 184                         return 0;
 185
 186                 if (drm_object_property_set_value(&connector->base,
 187                                                         property, value))
 188                         return -1;
 189
 190                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 191                         (value == DRM_MODE_SCALE_NO_SCALE);
 192
 193                 if (crtc->saved_mode.hdisplay != 0 &&
 194                     crtc->saved_mode.vdisplay != 0) {
 195                         if (centre) {
 196                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 197                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
 198                                         return -1;
 199                         } else {
 200                                 const struct drm_encoder_helper_funcs *helpers
 201                                                     = encoder->helper_private;
 202                                 helpers->mode_set(encoder, &crtc->saved_mode,
 203                                              &crtc->saved_adjusted_mode);
 204                         }
 205                 }
 206         }
 207         return 0;
 208 }
 209
 210 /*
 211  * Return the list of HDMI DDC modes if available.
 212  */
 213 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 214 {
 215         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 216         struct edid *edid = NULL;
 217         int ret = 0;
 218
 219         edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
 220         if (edid) {
 221                 drm_connector_update_edid_property(connector, edid);
 222                 ret = drm_add_edid_modes(connector, edid);
 223                 kfree(edid);
 224         }
 225         return ret;
 226 }
 227
 228 static enum drm_mode_status cdv_hdmi_mode_valid(struct drm_connector *connector,
 229                                  struct drm_display_mode *mode)
 230 {
 231         if (mode->clock > 165000)
 232                 return MODE_CLOCK_HIGH;
 233         if (mode->clock < 20000)
 234                 return MODE_CLOCK_HIGH;
 235
 236         /* just in case */
 237         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 238                 return MODE_NO_DBLESCAN;
 239
 240         /* just in case */
 241         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 242                 return MODE_NO_INTERLACE;
 243
 244         return MODE_OK;
 245 }
 246
 247 static void cdv_hdmi_destroy(struct drm_connector *connector)
 248 {
 249         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 250
 251         psb_intel_i2c_destroy(gma_encoder->i2c_bus);
 252         drm_connector_unregister(connector);
 253         drm_connector_cleanup(connector);
 254         kfree(connector);
 255 }
 256
 257 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 258         .dpms = cdv_hdmi_dpms,
 259         .prepare = gma_encoder_prepare,
 260         .mode_set = cdv_hdmi_mode_set,
 261         .commit = gma_encoder_commit,
 262 };
 263
 264 static const struct drm_connector_helper_funcs
 265                                         cdv_hdmi_connector_helper_funcs = {
 266         .get_modes = cdv_hdmi_get_modes,
 267         .mode_valid = cdv_hdmi_mode_valid,
 268         .best_encoder = gma_best_encoder,
 269 };
 270
 271 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 272         .dpms = drm_helper_connector_dpms,
 273         .detect = cdv_hdmi_detect,
 274         .fill_modes = drm_helper_probe_single_connector_modes,
 275         .set_property = cdv_hdmi_set_property,
 276         .destroy = cdv_hdmi_destroy,
 277 };
 278
 279 void cdv_hdmi_init(struct drm_device *dev,
 280                         struct psb_intel_mode_device *mode_dev, int reg)
 281 {
 282         struct gma_encoder *gma_encoder;
 283         struct gma_connector *gma_connector;
 284         struct drm_connector *connector;
 285         struct drm_encoder *encoder;
 286         struct mid_intel_hdmi_priv *hdmi_priv;
 287         int ddc_bus;
 288
 289         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 290
 291         if (!gma_encoder)
 292                 return;
 293
 294         gma_connector = kzalloc(sizeof(struct gma_connector),
 295                                       GFP_KERNEL);
 296
 297         if (!gma_connector)
 298                 goto err_connector;
 299
 300         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 301
 302         if (!hdmi_priv)
 303                 goto err_priv;
 304
 305         connector = &gma_connector->base;
 306         connector->polled = DRM_CONNECTOR_POLL_HPD;
 307         gma_connector->save = cdv_hdmi_save;
 308         gma_connector->restore = cdv_hdmi_restore;
 309
 310         encoder = &gma_encoder->base;
 311         drm_connector_init(dev, connector,
 312                            &cdv_hdmi_connector_funcs,
 313                            DRM_MODE_CONNECTOR_DVID);
 314
 315         drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
 316
 317         gma_connector_attach_encoder(gma_connector, gma_encoder);
 318         gma_encoder->type = INTEL_OUTPUT_HDMI;
 319         hdmi_priv->hdmi_reg = reg;
 320         hdmi_priv->has_hdmi_sink = false;
 321         gma_encoder->dev_priv = hdmi_priv;
 322
 323         drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 324         drm_connector_helper_add(connector,
 325                                  &cdv_hdmi_connector_helper_funcs);
 326         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 327         connector->interlace_allowed = false;
 328         connector->doublescan_allowed = false;
 329
 330         drm_object_attach_property(&connector->base,
 331                                       dev->mode_config.scaling_mode_property,
 332                                       DRM_MODE_SCALE_FULLSCREEN);
 333
 334         switch (reg) {
 335         case SDVOB:
 336                 ddc_bus = GPIOE;
 337                 gma_encoder->ddi_select = DDI0_SELECT;
 338                 break;
 339         case SDVOC:
 340                 ddc_bus = GPIOD;
 341                 gma_encoder->ddi_select = DDI1_SELECT;
 342                 break;
 343         default:
 344                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 345                 goto failed_ddc;
 346                 break;
 347         }
 348
 349         gma_encoder->i2c_bus = psb_intel_i2c_create(dev,
 350                                 ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 351
 352         if (!gma_encoder->i2c_bus) {
 353                 dev_err(dev->dev, "No ddc adapter available!\n");
 354                 goto failed_ddc;
 355         }
 356
 357         hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
 358         hdmi_priv->dev = dev;
 359         drm_connector_register(connector);
 360         return;
 361
 362 failed_ddc:
 363         drm_encoder_cleanup(encoder);
 364         drm_connector_cleanup(connector);
 365 err_priv:
 366         kfree(gma_connector);
 367 err_connector:
 368         kfree(gma_encoder);
 369 }