linux/drivers/gpu/drm/gma500/cdv_intel_hdmi.c
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   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
  50struct 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
  62static 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 psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
  68        struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
  69        u32 hdmib;
  70        struct drm_crtc *crtc = encoder->crtc;
  71        struct psb_intel_crtc *intel_crtc = to_psb_intel_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 (intel_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
  92static 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
  99static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
 100{
 101        struct drm_device *dev = encoder->dev;
 102        struct psb_intel_encoder *psb_intel_encoder =
 103                                                to_psb_intel_encoder(encoder);
 104        struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 105        u32 hdmib;
 106
 107        hdmib = REG_READ(hdmi_priv->hdmi_reg);
 108
 109        if (mode != DRM_MODE_DPMS_ON)
 110                REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 111        else
 112                REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 113        REG_READ(hdmi_priv->hdmi_reg);
 114}
 115
 116static void cdv_hdmi_save(struct drm_connector *connector)
 117{
 118        struct drm_device *dev = connector->dev;
 119        struct psb_intel_encoder *psb_intel_encoder =
 120                                        psb_intel_attached_encoder(connector);
 121        struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 122
 123        hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 124}
 125
 126static void cdv_hdmi_restore(struct drm_connector *connector)
 127{
 128        struct drm_device *dev = connector->dev;
 129        struct psb_intel_encoder *psb_intel_encoder =
 130                                        psb_intel_attached_encoder(connector);
 131        struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 132
 133        REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 134        REG_READ(hdmi_priv->hdmi_reg);
 135}
 136
 137static enum drm_connector_status cdv_hdmi_detect(
 138                                struct drm_connector *connector, bool force)
 139{
 140        struct psb_intel_encoder *psb_intel_encoder =
 141                                        psb_intel_attached_encoder(connector);
 142        struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 143        struct edid *edid = NULL;
 144        enum drm_connector_status status = connector_status_disconnected;
 145
 146        edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 147
 148        hdmi_priv->has_hdmi_sink = false;
 149        hdmi_priv->has_hdmi_audio = false;
 150        if (edid) {
 151                if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 152                        status = connector_status_connected;
 153                        hdmi_priv->has_hdmi_sink =
 154                                                drm_detect_hdmi_monitor(edid);
 155                        hdmi_priv->has_hdmi_audio =
 156                                                drm_detect_monitor_audio(edid);
 157                }
 158                kfree(edid);
 159        }
 160        return status;
 161}
 162
 163static int cdv_hdmi_set_property(struct drm_connector *connector,
 164                                       struct drm_property *property,
 165                                       uint64_t value)
 166{
 167        struct drm_encoder *encoder = connector->encoder;
 168
 169        if (!strcmp(property->name, "scaling mode") && encoder) {
 170                struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
 171                bool centre;
 172                uint64_t curValue;
 173
 174                if (!crtc)
 175                        return -1;
 176
 177                switch (value) {
 178                case DRM_MODE_SCALE_FULLSCREEN:
 179                        break;
 180                case DRM_MODE_SCALE_NO_SCALE:
 181                        break;
 182                case DRM_MODE_SCALE_ASPECT:
 183                        break;
 184                default:
 185                        return -1;
 186                }
 187
 188                if (drm_object_property_get_value(&connector->base,
 189                                                        property, &curValue))
 190                        return -1;
 191
 192                if (curValue == value)
 193                        return 0;
 194
 195                if (drm_object_property_set_value(&connector->base,
 196                                                        property, value))
 197                        return -1;
 198
 199                centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 200                        (value == DRM_MODE_SCALE_NO_SCALE);
 201
 202                if (crtc->saved_mode.hdisplay != 0 &&
 203                    crtc->saved_mode.vdisplay != 0) {
 204                        if (centre) {
 205                                if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 206                                            encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 207                                        return -1;
 208                        } else {
 209                                struct drm_encoder_helper_funcs *helpers
 210                                                    = encoder->helper_private;
 211                                helpers->mode_set(encoder, &crtc->saved_mode,
 212                                             &crtc->saved_adjusted_mode);
 213                        }
 214                }
 215        }
 216        return 0;
 217}
 218
 219/*
 220 * Return the list of HDMI DDC modes if available.
 221 */
 222static int cdv_hdmi_get_modes(struct drm_connector *connector)
 223{
 224        struct psb_intel_encoder *psb_intel_encoder =
 225                                        psb_intel_attached_encoder(connector);
 226        struct edid *edid = NULL;
 227        int ret = 0;
 228
 229        edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 230        if (edid) {
 231                drm_mode_connector_update_edid_property(connector, edid);
 232                ret = drm_add_edid_modes(connector, edid);
 233                kfree(edid);
 234        }
 235        return ret;
 236}
 237
 238static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 239                                 struct drm_display_mode *mode)
 240{
 241        if (mode->clock > 165000)
 242                return MODE_CLOCK_HIGH;
 243        if (mode->clock < 20000)
 244                return MODE_CLOCK_HIGH;
 245
 246        /* just in case */
 247        if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 248                return MODE_NO_DBLESCAN;
 249
 250        /* just in case */
 251        if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 252                return MODE_NO_INTERLACE;
 253
 254        return MODE_OK;
 255}
 256
 257static void cdv_hdmi_destroy(struct drm_connector *connector)
 258{
 259        struct psb_intel_encoder *psb_intel_encoder =
 260                                        psb_intel_attached_encoder(connector);
 261
 262        if (psb_intel_encoder->i2c_bus)
 263                psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
 264        drm_sysfs_connector_remove(connector);
 265        drm_connector_cleanup(connector);
 266        kfree(connector);
 267}
 268
 269static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 270        .dpms = cdv_hdmi_dpms,
 271        .mode_fixup = cdv_hdmi_mode_fixup,
 272        .prepare = psb_intel_encoder_prepare,
 273        .mode_set = cdv_hdmi_mode_set,
 274        .commit = psb_intel_encoder_commit,
 275};
 276
 277static const struct drm_connector_helper_funcs
 278                                        cdv_hdmi_connector_helper_funcs = {
 279        .get_modes = cdv_hdmi_get_modes,
 280        .mode_valid = cdv_hdmi_mode_valid,
 281        .best_encoder = psb_intel_best_encoder,
 282};
 283
 284static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 285        .dpms = drm_helper_connector_dpms,
 286        .save = cdv_hdmi_save,
 287        .restore = cdv_hdmi_restore,
 288        .detect = cdv_hdmi_detect,
 289        .fill_modes = drm_helper_probe_single_connector_modes,
 290        .set_property = cdv_hdmi_set_property,
 291        .destroy = cdv_hdmi_destroy,
 292};
 293
 294void cdv_hdmi_init(struct drm_device *dev,
 295                        struct psb_intel_mode_device *mode_dev, int reg)
 296{
 297        struct psb_intel_encoder *psb_intel_encoder;
 298        struct psb_intel_connector *psb_intel_connector;
 299        struct drm_connector *connector;
 300        struct drm_encoder *encoder;
 301        struct mid_intel_hdmi_priv *hdmi_priv;
 302        int ddc_bus;
 303
 304        psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
 305                                    GFP_KERNEL);
 306
 307        if (!psb_intel_encoder)
 308                return;
 309
 310        psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
 311                                      GFP_KERNEL);
 312
 313        if (!psb_intel_connector)
 314                goto err_connector;
 315
 316        hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
 317
 318        if (!hdmi_priv)
 319                goto err_priv;
 320
 321        connector = &psb_intel_connector->base;
 322        encoder = &psb_intel_encoder->base;
 323        drm_connector_init(dev, connector,
 324                           &cdv_hdmi_connector_funcs,
 325                           DRM_MODE_CONNECTOR_DVID);
 326
 327        drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 328                         DRM_MODE_ENCODER_TMDS);
 329
 330        psb_intel_connector_attach_encoder(psb_intel_connector,
 331                                           psb_intel_encoder);
 332        psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
 333        hdmi_priv->hdmi_reg = reg;
 334        hdmi_priv->has_hdmi_sink = false;
 335        psb_intel_encoder->dev_priv = hdmi_priv;
 336
 337        drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 338        drm_connector_helper_add(connector,
 339                                 &cdv_hdmi_connector_helper_funcs);
 340        connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 341        connector->interlace_allowed = false;
 342        connector->doublescan_allowed = false;
 343
 344        drm_object_attach_property(&connector->base,
 345                                      dev->mode_config.scaling_mode_property,
 346                                      DRM_MODE_SCALE_FULLSCREEN);
 347
 348        switch (reg) {
 349        case SDVOB:
 350                ddc_bus = GPIOE;
 351                psb_intel_encoder->ddi_select = DDI0_SELECT;
 352                break;
 353        case SDVOC:
 354                ddc_bus = GPIOD;
 355                psb_intel_encoder->ddi_select = DDI1_SELECT;
 356                break;
 357        default:
 358                DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 359                goto failed_ddc;
 360                break;
 361        }
 362
 363        psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
 364                                ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
 365
 366        if (!psb_intel_encoder->i2c_bus) {
 367                dev_err(dev->dev, "No ddc adapter available!\n");
 368                goto failed_ddc;
 369        }
 370
 371        hdmi_priv->hdmi_i2c_adapter =
 372                                &(psb_intel_encoder->i2c_bus->adapter);
 373        hdmi_priv->dev = dev;
 374        drm_sysfs_connector_add(connector);
 375        return;
 376
 377failed_ddc:
 378        drm_encoder_cleanup(encoder);
 379        drm_connector_cleanup(connector);
 380err_priv:
 381        kfree(psb_intel_connector);
 382err_connector:
 383        kfree(psb_intel_encoder);
 384}
 385