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 <[email protected]>
  25  */
  26
  27 #include <linux/pm_runtime.h>
  28
  29 #include <drm/drm.h>
  30 #include <drm/drm_crtc.h>
  31 #include <drm/drm_crtc_helper.h>
  32 #include <drm/drm_edid.h>
  33 #include <drm/drm_modeset_helper_vtables.h>
  34 #include <drm/drm_simple_kms_helper.h>
  35
  36 #include "cdv_device.h"
  37 #include "psb_drv.h"
  38 #include "psb_intel_drv.h"
  39 #include "psb_intel_reg.h"
  40
  41 /* hdmi control bits */
  42 #define HDMI_NULL_PACKETS_DURING_VSYNC  (1 << 9)
  43 #define HDMI_BORDER_ENABLE              (1 << 7)
  44 #define HDMI_AUDIO_ENABLE               (1 << 6)
  45 #define HDMI_VSYNC_ACTIVE_HIGH          (1 << 4)
  46 #define HDMI_HSYNC_ACTIVE_HIGH          (1 << 3)
  47 /* hdmi-b control bits */
  48 #define HDMIB_PIPE_B_SELECT             (1 << 30)
  49
  50
  51 struct mid_intel_hdmi_priv {
  52         u32 hdmi_reg;
  53         u32 save_HDMIB;
  54         bool has_hdmi_sink;
  55         bool has_hdmi_audio;
  56         /* Should set this when detect hotplug */
  57         bool hdmi_device_connected;
  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 gma_encoder *gma_encoder = to_gma_encoder(encoder);
  67         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  68         u32 hdmib;
  69         struct drm_crtc *crtc = encoder->crtc;
  70         struct gma_crtc *gma_crtc = to_gma_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 (gma_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 void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
  92 {
  93         struct drm_device *dev = encoder->dev;
  94         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
  95         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
  96         u32 hdmib;
  97
  98         hdmib = REG_READ(hdmi_priv->hdmi_reg);
  99
 100         if (mode != DRM_MODE_DPMS_ON)
 101                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 102         else
 103                 REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 104         REG_READ(hdmi_priv->hdmi_reg);
 105 }
 106
 107 static void cdv_hdmi_save(struct drm_connector *connector)
 108 {
 109         struct drm_device *dev = connector->dev;
 110         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 111         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 112
 113         hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 114 }
 115
 116 static void cdv_hdmi_restore(struct drm_connector *connector)
 117 {
 118         struct drm_device *dev = connector->dev;
 119         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 120         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 121
 122         REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 123         REG_READ(hdmi_priv->hdmi_reg);
 124 }
 125
 126 static enum drm_connector_status cdv_hdmi_detect(
 127                                 struct drm_connector *connector, bool force)
 128 {
 129         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 130         struct mid_intel_hdmi_priv *hdmi_priv = gma_encoder->dev_priv;
 131         struct edid *edid = NULL;
 132         enum drm_connector_status status = connector_status_disconnected;
 133
 134         edid = drm_get_edid(connector, connector->ddc);
 135
 136         hdmi_priv->has_hdmi_sink = false;
 137         hdmi_priv->has_hdmi_audio = false;
 138         if (edid) {
 139                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 140                         status = connector_status_connected;
 141                         hdmi_priv->has_hdmi_sink =
 142                                                 drm_detect_hdmi_monitor(edid);
 143                         hdmi_priv->has_hdmi_audio =
 144                                                 drm_detect_monitor_audio(edid);
 145                 }
 146                 kfree(edid);
 147         }
 148         return status;
 149 }
 150
 151 static int cdv_hdmi_set_property(struct drm_connector *connector,
 152                                        struct drm_property *property,
 153                                        uint64_t value)
 154 {
 155         struct drm_encoder *encoder = connector->encoder;
 156
 157         if (!strcmp(property->name, "scaling mode") && encoder) {
 158                 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
 159                 bool centre;
 160                 uint64_t curValue;
 161
 162                 if (!crtc)
 163                         return -1;
 164
 165                 switch (value) {
 166                 case DRM_MODE_SCALE_FULLSCREEN:
 167                         break;
 168                 case DRM_MODE_SCALE_NO_SCALE:
 169                         break;
 170                 case DRM_MODE_SCALE_ASPECT:
 171                         break;
 172                 default:
 173                         return -1;
 174                 }
 175
 176                 if (drm_object_property_get_value(&connector->base,
 177                                                         property, &curValue))
 178                         return -1;
 179
 180                 if (curValue == value)
 181                         return 0;
 182
 183                 if (drm_object_property_set_value(&connector->base,
 184                                                         property, value))
 185                         return -1;
 186
 187                 centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 188                         (value == DRM_MODE_SCALE_NO_SCALE);
 189
 190                 if (crtc->saved_mode.hdisplay != 0 &&
 191                     crtc->saved_mode.vdisplay != 0) {
 192                         if (centre) {
 193                                 if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 194                                             encoder->crtc->x, encoder->crtc->y, encoder->crtc->primary->fb))
 195                                         return -1;
 196                         } else {
 197                                 const struct drm_encoder_helper_funcs *helpers
 198                                                     = encoder->helper_private;
 199                                 helpers->mode_set(encoder, &crtc->saved_mode,
 200                                              &crtc->saved_adjusted_mode);
 201                         }
 202                 }
 203         }
 204         return 0;
 205 }
 206
 207 /*
 208  * Return the list of HDMI DDC modes if available.
 209  */
 210 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 211 {
 212         struct edid *edid = NULL;
 213         int ret = 0;
 214
 215         edid = drm_get_edid(connector, connector->ddc);
 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_connector *gma_connector = to_gma_connector(connector);
 246         struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
 247
 248         gma_i2c_destroy(ddc_bus);
 249         drm_connector_cleanup(connector);
 250         kfree(gma_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 mid_intel_hdmi_priv *hdmi_priv;
 282         struct gma_i2c_chan *ddc_bus;
 283         int ddc_reg;
 284         int ret;
 285
 286         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 287         if (!gma_encoder)
 288                 return;
 289
 290         gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
 291         if (!gma_connector)
 292                 goto err_free_encoder;
 293
 294         hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 295         if (!hdmi_priv)
 296                 goto err_free_connector;
 297
 298         connector = &gma_connector->base;
 299         connector->polled = DRM_CONNECTOR_POLL_HPD;
 300         gma_connector->save = cdv_hdmi_save;
 301         gma_connector->restore = cdv_hdmi_restore;
 302
 303         switch (reg) {
 304         case SDVOB:
 305                 ddc_reg = GPIOE;
 306                 gma_encoder->ddi_select = DDI0_SELECT;
 307                 break;
 308         case SDVOC:
 309                 ddc_reg = GPIOD;
 310                 gma_encoder->ddi_select = DDI1_SELECT;
 311                 break;
 312         default:
 313                 DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 314                 goto err_free_hdmi_priv;
 315         }
 316
 317         ddc_bus = gma_i2c_create(dev, ddc_reg,
 318                                  (reg == SDVOB) ? "HDMIB" : "HDMIC");
 319         if (!ddc_bus) {
 320                 dev_err(dev->dev, "No ddc adapter available!\n");
 321                 goto err_free_hdmi_priv;
 322         }
 323
 324         ret = drm_connector_init_with_ddc(dev, connector,
 325                                           &cdv_hdmi_connector_funcs,
 326                                           DRM_MODE_CONNECTOR_DVID,
 327                                           &ddc_bus->base);
 328         if (ret)
 329                 goto err_ddc_destroy;
 330
 331         ret = drm_simple_encoder_init(dev, &gma_encoder->base,
 332                                       DRM_MODE_ENCODER_TMDS);
 333         if (ret)
 334                 goto err_connector_cleanup;
 335
 336         gma_connector_attach_encoder(gma_connector, gma_encoder);
 337         gma_encoder->type = INTEL_OUTPUT_HDMI;
 338         hdmi_priv->hdmi_reg = reg;
 339         hdmi_priv->has_hdmi_sink = false;
 340         gma_encoder->dev_priv = hdmi_priv;
 341
 342         drm_encoder_helper_add(&gma_encoder->base, &cdv_hdmi_helper_funcs);
 343         drm_connector_helper_add(connector,
 344                                  &cdv_hdmi_connector_helper_funcs);
 345         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 346         connector->interlace_allowed = false;
 347         connector->doublescan_allowed = false;
 348
 349         drm_object_attach_property(&connector->base,
 350                                       dev->mode_config.scaling_mode_property,
 351                                       DRM_MODE_SCALE_FULLSCREEN);
 352
 353         hdmi_priv->dev = dev;
 354         return;
 355
 356 err_connector_cleanup:
 357         drm_connector_cleanup(connector);
 358 err_ddc_destroy:
 359         gma_i2c_destroy(ddc_bus);
 360 err_free_hdmi_priv:
 361         kfree(hdmi_priv);
 362 err_free_connector:
 363         kfree(gma_connector);
 364 err_free_encoder:
 365         kfree(gma_encoder);
 366 }