drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18
  19 #include "msm_drv.h"
  20 #include "msm_mmu.h"
  21 #include "mdp4_kms.h"
  22
  23 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev);
  24
  25 static int mdp4_hw_init(struct msm_kms *kms)
  26 {
  27         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  28         struct drm_device *dev = mdp4_kms->dev;
  29         uint32_t version, major, minor, dmap_cfg, vg_cfg;
  30         unsigned long clk;
  31         int ret = 0;
  32
  33         pm_runtime_get_sync(dev->dev);
  34
  35         mdp4_enable(mdp4_kms);
  36         version = mdp4_read(mdp4_kms, REG_MDP4_VERSION);
  37         mdp4_disable(mdp4_kms);
  38
  39         major = FIELD(version, MDP4_VERSION_MAJOR);
  40         minor = FIELD(version, MDP4_VERSION_MINOR);
  41
  42         DBG("found MDP4 version v%d.%d", major, minor);
  43
  44         if (major != 4) {
  45                 dev_err(dev->dev, "unexpected MDP version: v%d.%d\n",
  46                                 major, minor);
  47                 ret = -ENXIO;
  48                 goto out;
  49         }
  50
  51         mdp4_kms->rev = minor;
  52
  53         if (mdp4_kms->rev > 1) {
  54                 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
  55                 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
  56         }
  57
  58         mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);
  59
  60         /* max read pending cmd config, 3 pending requests: */
  61         mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);
  62
  63         clk = clk_get_rate(mdp4_kms->clk);
  64
  65         if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) {
  66                 dmap_cfg = 0x47;     /* 16 bytes-burst x 8 req */
  67                 vg_cfg = 0x47;       /* 16 bytes-burs x 8 req */
  68         } else {
  69                 dmap_cfg = 0x27;     /* 8 bytes-burst x 8 req */
  70                 vg_cfg = 0x43;       /* 16 bytes-burst x 4 req */
  71         }
  72
  73         DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);
  74
  75         mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
  76         mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);
  77
  78         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
  79         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
  80         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
  81         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);
  82
  83         if (mdp4_kms->rev >= 2)
  84                 mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);
  85         mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG, 0);
  86
  87         /* disable CSC matrix / YUV by default: */
  88         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
  89         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
  90         mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
  91         mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
  92         mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
  93         mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);
  94
  95         if (mdp4_kms->rev > 1)
  96                 mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);
  97
  98         dev->mode_config.allow_fb_modifiers = true;
  99
 100 out:
 101         pm_runtime_put_sync(dev->dev);
 102
 103         return ret;
 104 }
 105
 106 static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
 107 {
 108         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 109         int i;
 110         struct drm_crtc *crtc;
 111         struct drm_crtc_state *crtc_state;
 112
 113         mdp4_enable(mdp4_kms);
 114
 115         /* see 119ecb7fd */
 116         for_each_crtc_in_state(state, crtc, crtc_state, i)
 117                 drm_crtc_vblank_get(crtc);
 118 }
 119
 120 static void mdp4_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
 121 {
 122         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 123         int i;
 124         struct drm_crtc *crtc;
 125         struct drm_crtc_state *crtc_state;
 126
 127         /* see 119ecb7fd */
 128         for_each_crtc_in_state(state, crtc, crtc_state, i)
 129                 drm_crtc_vblank_put(crtc);
 130
 131         mdp4_disable(mdp4_kms);
 132 }
 133
 134 static void mdp4_wait_for_crtc_commit_done(struct msm_kms *kms,
 135                                                 struct drm_crtc *crtc)
 136 {
 137         mdp4_crtc_wait_for_commit_done(crtc);
 138 }
 139
 140 static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
 141                 struct drm_encoder *encoder)
 142 {
 143         /* if we had >1 encoder, we'd need something more clever: */
 144         switch (encoder->encoder_type) {
 145         case DRM_MODE_ENCODER_TMDS:
 146                 return mdp4_dtv_round_pixclk(encoder, rate);
 147         case DRM_MODE_ENCODER_LVDS:
 148         case DRM_MODE_ENCODER_DSI:
 149         default:
 150                 return rate;
 151         }
 152 }
 153
 154 static const char * const iommu_ports[] = {
 155         "mdp_port0_cb0", "mdp_port1_cb0",
 156 };
 157
 158 static void mdp4_destroy(struct msm_kms *kms)
 159 {
 160         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 161         struct device *dev = mdp4_kms->dev->dev;
 162         struct msm_mmu *mmu = mdp4_kms->mmu;
 163
 164         if (mmu) {
 165                 mmu->funcs->detach(mmu, iommu_ports, ARRAY_SIZE(iommu_ports));
 166                 mmu->funcs->destroy(mmu);
 167         }
 168
 169         if (mdp4_kms->blank_cursor_iova)
 170                 msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id);
 171         drm_gem_object_unreference_unlocked(mdp4_kms->blank_cursor_bo);
 172
 173         if (mdp4_kms->rpm_enabled)
 174                 pm_runtime_disable(dev);
 175
 176         kfree(mdp4_kms);
 177 }
 178
 179 static const struct mdp_kms_funcs kms_funcs = {
 180         .base = {
 181                 .hw_init         = mdp4_hw_init,
 182                 .irq_preinstall  = mdp4_irq_preinstall,
 183                 .irq_postinstall = mdp4_irq_postinstall,
 184                 .irq_uninstall   = mdp4_irq_uninstall,
 185                 .irq             = mdp4_irq,
 186                 .enable_vblank   = mdp4_enable_vblank,
 187                 .disable_vblank  = mdp4_disable_vblank,
 188                 .prepare_commit  = mdp4_prepare_commit,
 189                 .complete_commit = mdp4_complete_commit,
 190                 .wait_for_crtc_commit_done = mdp4_wait_for_crtc_commit_done,
 191                 .get_format      = mdp_get_format,
 192                 .round_pixclk    = mdp4_round_pixclk,
 193                 .destroy         = mdp4_destroy,
 194         },
 195         .set_irqmask         = mdp4_set_irqmask,
 196 };
 197
 198 int mdp4_disable(struct mdp4_kms *mdp4_kms)
 199 {
 200         DBG("");
 201
 202         clk_disable_unprepare(mdp4_kms->clk);
 203         if (mdp4_kms->pclk)
 204                 clk_disable_unprepare(mdp4_kms->pclk);
 205         clk_disable_unprepare(mdp4_kms->lut_clk);
 206         if (mdp4_kms->axi_clk)
 207                 clk_disable_unprepare(mdp4_kms->axi_clk);
 208
 209         return 0;
 210 }
 211
 212 int mdp4_enable(struct mdp4_kms *mdp4_kms)
 213 {
 214         DBG("");
 215
 216         clk_prepare_enable(mdp4_kms->clk);
 217         if (mdp4_kms->pclk)
 218                 clk_prepare_enable(mdp4_kms->pclk);
 219         clk_prepare_enable(mdp4_kms->lut_clk);
 220         if (mdp4_kms->axi_clk)
 221                 clk_prepare_enable(mdp4_kms->axi_clk);
 222
 223         return 0;
 224 }
 225
 226 static struct device_node *mdp4_detect_lcdc_panel(struct drm_device *dev)
 227 {
 228         struct device_node *endpoint, *panel_node;
 229         struct device_node *np = dev->dev->of_node;
 230
 231         endpoint = of_graph_get_next_endpoint(np, NULL);
 232         if (!endpoint) {
 233                 DBG("no endpoint in MDP4 to fetch LVDS panel\n");
 234                 return NULL;
 235         }
 236
 237         /* don't proceed if we have an endpoint but no panel_node tied to it */
 238         panel_node = of_graph_get_remote_port_parent(endpoint);
 239         if (!panel_node) {
 240                 dev_err(dev->dev, "no valid panel node\n");
 241                 of_node_put(endpoint);
 242                 return ERR_PTR(-ENODEV);
 243         }
 244
 245         of_node_put(endpoint);
 246
 247         return panel_node;
 248 }
 249
 250 static int mdp4_modeset_init_intf(struct mdp4_kms *mdp4_kms,
 251                                   int intf_type)
 252 {
 253         struct drm_device *dev = mdp4_kms->dev;
 254         struct msm_drm_private *priv = dev->dev_private;
 255         struct drm_encoder *encoder;
 256         struct drm_connector *connector;
 257         struct device_node *panel_node;
 258         struct drm_encoder *dsi_encs[MSM_DSI_ENCODER_NUM];
 259         int i, dsi_id;
 260         int ret;
 261
 262         switch (intf_type) {
 263         case DRM_MODE_ENCODER_LVDS:
 264                 /*
 265                  * bail out early if:
 266                  * - there is no panel node (no need to initialize lcdc
 267                  *   encoder and lvds connector), or
 268                  * - panel node is a bad pointer
 269                  */
 270                 panel_node = mdp4_detect_lcdc_panel(dev);
 271                 if (IS_ERR_OR_NULL(panel_node))
 272                         return PTR_ERR(panel_node);
 273
 274                 encoder = mdp4_lcdc_encoder_init(dev, panel_node);
 275                 if (IS_ERR(encoder)) {
 276                         dev_err(dev->dev, "failed to construct LCDC encoder\n");
 277                         return PTR_ERR(encoder);
 278                 }
 279
 280                 /* LCDC can be hooked to DMA_P (TODO: Add DMA_S later?) */
 281                 encoder->possible_crtcs = 1 << DMA_P;
 282
 283                 connector = mdp4_lvds_connector_init(dev, panel_node, encoder);
 284                 if (IS_ERR(connector)) {
 285                         dev_err(dev->dev, "failed to initialize LVDS connector\n");
 286                         return PTR_ERR(connector);
 287                 }
 288
 289                 priv->encoders[priv->num_encoders++] = encoder;
 290                 priv->connectors[priv->num_connectors++] = connector;
 291
 292                 break;
 293         case DRM_MODE_ENCODER_TMDS:
 294                 encoder = mdp4_dtv_encoder_init(dev);
 295                 if (IS_ERR(encoder)) {
 296                         dev_err(dev->dev, "failed to construct DTV encoder\n");
 297                         return PTR_ERR(encoder);
 298                 }
 299
 300                 /* DTV can be hooked to DMA_E: */
 301                 encoder->possible_crtcs = 1 << 1;
 302
 303                 if (priv->hdmi) {
 304                         /* Construct bridge/connector for HDMI: */
 305                         ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
 306                         if (ret) {
 307                                 dev_err(dev->dev, "failed to initialize HDMI: %d\n", ret);
 308                                 return ret;
 309                         }
 310                 }
 311
 312                 priv->encoders[priv->num_encoders++] = encoder;
 313
 314                 break;
 315         case DRM_MODE_ENCODER_DSI:
 316                 /* only DSI1 supported for now */
 317                 dsi_id = 0;
 318
 319                 if (!priv->dsi[dsi_id])
 320                         break;
 321
 322                 for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
 323                         dsi_encs[i] = mdp4_dsi_encoder_init(dev);
 324                         if (IS_ERR(dsi_encs[i])) {
 325                                 ret = PTR_ERR(dsi_encs[i]);
 326                                 dev_err(dev->dev,
 327                                         "failed to construct DSI encoder: %d\n",
 328                                         ret);
 329                                 return ret;
 330                         }
 331
 332                         /* TODO: Add DMA_S later? */
 333                         dsi_encs[i]->possible_crtcs = 1 << DMA_P;
 334                         priv->encoders[priv->num_encoders++] = dsi_encs[i];
 335                 }
 336
 337                 ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, dsi_encs);
 338                 if (ret) {
 339                         dev_err(dev->dev, "failed to initialize DSI: %d\n",
 340                                 ret);
 341                         return ret;
 342                 }
 343
 344                 break;
 345         default:
 346                 dev_err(dev->dev, "Invalid or unsupported interface\n");
 347                 return -EINVAL;
 348         }
 349
 350         return 0;
 351 }
 352
 353 static int modeset_init(struct mdp4_kms *mdp4_kms)
 354 {
 355         struct drm_device *dev = mdp4_kms->dev;
 356         struct msm_drm_private *priv = dev->dev_private;
 357         struct drm_plane *plane;
 358         struct drm_crtc *crtc;
 359         int i, ret;
 360         static const enum mdp4_pipe rgb_planes[] = {
 361                 RGB1, RGB2,
 362         };
 363         static const enum mdp4_pipe vg_planes[] = {
 364                 VG1, VG2,
 365         };
 366         static const enum mdp4_dma mdp4_crtcs[] = {
 367                 DMA_P, DMA_E,
 368         };
 369         static const char * const mdp4_crtc_names[] = {
 370                 "DMA_P", "DMA_E",
 371         };
 372         static const int mdp4_intfs[] = {
 373                 DRM_MODE_ENCODER_LVDS,
 374                 DRM_MODE_ENCODER_DSI,
 375                 DRM_MODE_ENCODER_TMDS,
 376         };
 377
 378         /* construct non-private planes: */
 379         for (i = 0; i < ARRAY_SIZE(vg_planes); i++) {
 380                 plane = mdp4_plane_init(dev, vg_planes[i], false);
 381                 if (IS_ERR(plane)) {
 382                         dev_err(dev->dev,
 383                                 "failed to construct plane for VG%d\n", i + 1);
 384                         ret = PTR_ERR(plane);
 385                         goto fail;
 386                 }
 387                 priv->planes[priv->num_planes++] = plane;
 388         }
 389
 390         for (i = 0; i < ARRAY_SIZE(mdp4_crtcs); i++) {
 391                 plane = mdp4_plane_init(dev, rgb_planes[i], true);
 392                 if (IS_ERR(plane)) {
 393                         dev_err(dev->dev,
 394                                 "failed to construct plane for RGB%d\n", i + 1);
 395                         ret = PTR_ERR(plane);
 396                         goto fail;
 397                 }
 398
 399                 crtc  = mdp4_crtc_init(dev, plane, priv->num_crtcs, i,
 400                                 mdp4_crtcs[i]);
 401                 if (IS_ERR(crtc)) {
 402                         dev_err(dev->dev, "failed to construct crtc for %s\n",
 403                                 mdp4_crtc_names[i]);
 404                         ret = PTR_ERR(crtc);
 405                         goto fail;
 406                 }
 407
 408                 priv->crtcs[priv->num_crtcs++] = crtc;
 409         }
 410
 411         /*
 412          * we currently set up two relatively fixed paths:
 413          *
 414          * LCDC/LVDS path: RGB1 -> DMA_P -> LCDC -> LVDS
 415          *                      or
 416          * DSI path: RGB1 -> DMA_P -> DSI1 -> DSI Panel
 417          *
 418          * DTV/HDMI path: RGB2 -> DMA_E -> DTV -> HDMI
 419          */
 420
 421         for (i = 0; i < ARRAY_SIZE(mdp4_intfs); i++) {
 422                 ret = mdp4_modeset_init_intf(mdp4_kms, mdp4_intfs[i]);
 423                 if (ret) {
 424                         dev_err(dev->dev, "failed to initialize intf: %d, %d\n",
 425                                 i, ret);
 426                         goto fail;
 427                 }
 428         }
 429
 430         return 0;
 431
 432 fail:
 433         return ret;
 434 }
 435
 436 struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 437 {
 438         struct platform_device *pdev = dev->platformdev;
 439         struct mdp4_platform_config *config = mdp4_get_config(pdev);
 440         struct mdp4_kms *mdp4_kms;
 441         struct msm_kms *kms = NULL;
 442         struct msm_mmu *mmu;
 443         int irq, ret;
 444
 445         mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
 446         if (!mdp4_kms) {
 447                 dev_err(dev->dev, "failed to allocate kms\n");
 448                 ret = -ENOMEM;
 449                 goto fail;
 450         }
 451
 452         mdp_kms_init(&mdp4_kms->base, &kms_funcs);
 453
 454         kms = &mdp4_kms->base.base;
 455
 456         mdp4_kms->dev = dev;
 457
 458         mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
 459         if (IS_ERR(mdp4_kms->mmio)) {
 460                 ret = PTR_ERR(mdp4_kms->mmio);
 461                 goto fail;
 462         }
 463
 464         irq = platform_get_irq(pdev, 0);
 465         if (irq < 0) {
 466                 ret = irq;
 467                 dev_err(dev->dev, "failed to get irq: %d\n", ret);
 468                 goto fail;
 469         }
 470
 471         kms->irq = irq;
 472
 473         /* NOTE: driver for this regulator still missing upstream.. use
 474          * _get_exclusive() and ignore the error if it does not exist
 475          * (and hope that the bootloader left it on for us)
 476          */
 477         mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd");
 478         if (IS_ERR(mdp4_kms->vdd))
 479                 mdp4_kms->vdd = NULL;
 480
 481         if (mdp4_kms->vdd) {
 482                 ret = regulator_enable(mdp4_kms->vdd);
 483                 if (ret) {
 484                         dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
 485                         goto fail;
 486                 }
 487         }
 488
 489         mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
 490         if (IS_ERR(mdp4_kms->clk)) {
 491                 dev_err(dev->dev, "failed to get core_clk\n");
 492                 ret = PTR_ERR(mdp4_kms->clk);
 493                 goto fail;
 494         }
 495
 496         mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
 497         if (IS_ERR(mdp4_kms->pclk))
 498                 mdp4_kms->pclk = NULL;
 499
 500         // XXX if (rev >= MDP_REV_42) { ???
 501         mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
 502         if (IS_ERR(mdp4_kms->lut_clk)) {
 503                 dev_err(dev->dev, "failed to get lut_clk\n");
 504                 ret = PTR_ERR(mdp4_kms->lut_clk);
 505                 goto fail;
 506         }
 507
 508         mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
 509         if (IS_ERR(mdp4_kms->axi_clk)) {
 510                 dev_err(dev->dev, "failed to get axi_clk\n");
 511                 ret = PTR_ERR(mdp4_kms->axi_clk);
 512                 goto fail;
 513         }
 514
 515         clk_set_rate(mdp4_kms->clk, config->max_clk);
 516         clk_set_rate(mdp4_kms->lut_clk, config->max_clk);
 517
 518         pm_runtime_enable(dev->dev);
 519         mdp4_kms->rpm_enabled = true;
 520
 521         /* make sure things are off before attaching iommu (bootloader could
 522          * have left things on, in which case we'll start getting faults if
 523          * we don't disable):
 524          */
 525         mdp4_enable(mdp4_kms);
 526         mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
 527         mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
 528         mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
 529         mdp4_disable(mdp4_kms);
 530         mdelay(16);
 531
 532         if (config->iommu) {
 533                 mmu = msm_iommu_new(&pdev->dev, config->iommu);
 534                 if (IS_ERR(mmu)) {
 535                         ret = PTR_ERR(mmu);
 536                         goto fail;
 537                 }
 538                 ret = mmu->funcs->attach(mmu, iommu_ports,
 539                                 ARRAY_SIZE(iommu_ports));
 540                 if (ret)
 541                         goto fail;
 542
 543                 mdp4_kms->mmu = mmu;
 544         } else {
 545                 dev_info(dev->dev, "no iommu, fallback to phys "
 546                                 "contig buffers for scanout\n");
 547                 mmu = NULL;
 548         }
 549
 550         mdp4_kms->id = msm_register_mmu(dev, mmu);
 551         if (mdp4_kms->id < 0) {
 552                 ret = mdp4_kms->id;
 553                 dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
 554                 goto fail;
 555         }
 556
 557         ret = modeset_init(mdp4_kms);
 558         if (ret) {
 559                 dev_err(dev->dev, "modeset_init failed: %d\n", ret);
 560                 goto fail;
 561         }
 562
 563         mutex_lock(&dev->struct_mutex);
 564         mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC);
 565         mutex_unlock(&dev->struct_mutex);
 566         if (IS_ERR(mdp4_kms->blank_cursor_bo)) {
 567                 ret = PTR_ERR(mdp4_kms->blank_cursor_bo);
 568                 dev_err(dev->dev, "could not allocate blank-cursor bo: %d\n", ret);
 569                 mdp4_kms->blank_cursor_bo = NULL;
 570                 goto fail;
 571         }
 572
 573         ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id,
 574                         &mdp4_kms->blank_cursor_iova);
 575         if (ret) {
 576                 dev_err(dev->dev, "could not pin blank-cursor bo: %d\n", ret);
 577                 goto fail;
 578         }
 579
 580         dev->mode_config.min_width = 0;
 581         dev->mode_config.min_height = 0;
 582         dev->mode_config.max_width = 2048;
 583         dev->mode_config.max_height = 2048;
 584
 585         return kms;
 586
 587 fail:
 588         if (kms)
 589                 mdp4_destroy(kms);
 590         return ERR_PTR(ret);
 591 }
 592
 593 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
 594 {
 595         static struct mdp4_platform_config config = {};
 596
 597         /* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */
 598         config.max_clk = 266667000;
 599         config.iommu = iommu_domain_alloc(&platform_bus_type);
 600
 601         return &config;
 602 }