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->dsi_pll_vdda) {
  54                 if ((mdp4_kms->rev == 2) || (mdp4_kms->rev == 4)) {
  55                         ret = regulator_set_voltage(mdp4_kms->dsi_pll_vdda,
  56                                         1200000, 1200000);
  57                         if (ret) {
  58                                 dev_err(dev->dev,
  59                                         "failed to set dsi_pll_vdda voltage: %d\n", ret);
  60                                 goto out;
  61                         }
  62                 }
  63         }
  64
  65         if (mdp4_kms->dsi_pll_vddio) {
  66                 if (mdp4_kms->rev == 2) {
  67                         ret = regulator_set_voltage(mdp4_kms->dsi_pll_vddio,
  68                                         1800000, 1800000);
  69                         if (ret) {
  70                                 dev_err(dev->dev,
  71                                         "failed to set dsi_pll_vddio voltage: %d\n", ret);
  72                                 goto out;
  73                         }
  74                 }
  75         }
  76
  77         if (mdp4_kms->rev > 1) {
  78                 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
  79                 mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
  80         }
  81
  82         mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);
  83
  84         /* max read pending cmd config, 3 pending requests: */
  85         mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);
  86
  87         clk = clk_get_rate(mdp4_kms->clk);
  88
  89         if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) {
  90                 dmap_cfg = 0x47;     /* 16 bytes-burst x 8 req */
  91                 vg_cfg = 0x47;       /* 16 bytes-burs x 8 req */
  92         } else {
  93                 dmap_cfg = 0x27;     /* 8 bytes-burst x 8 req */
  94                 vg_cfg = 0x43;       /* 16 bytes-burst x 4 req */
  95         }
  96
  97         DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);
  98
  99         mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
 100         mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);
 101
 102         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
 103         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
 104         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
 105         mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);
 106
 107         if (mdp4_kms->rev >= 2)
 108                 mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);
 109
 110         /* disable CSC matrix / YUV by default: */
 111         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
 112         mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
 113         mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
 114         mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
 115         mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
 116         mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);
 117
 118         if (mdp4_kms->rev > 1)
 119                 mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);
 120
 121 out:
 122         pm_runtime_put_sync(dev->dev);
 123
 124         return ret;
 125 }
 126
 127 static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
 128                 struct drm_encoder *encoder)
 129 {
 130         /* if we had >1 encoder, we'd need something more clever: */
 131         return mdp4_dtv_round_pixclk(encoder, rate);
 132 }
 133
 134 static void mdp4_preclose(struct msm_kms *kms, struct drm_file *file)
 135 {
 136         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 137         struct msm_drm_private *priv = mdp4_kms->dev->dev_private;
 138         unsigned i;
 139
 140         for (i = 0; i < priv->num_crtcs; i++)
 141                 mdp4_crtc_cancel_pending_flip(priv->crtcs[i], file);
 142 }
 143
 144 static void mdp4_destroy(struct msm_kms *kms)
 145 {
 146         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 147         if (mdp4_kms->blank_cursor_iova)
 148                 msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id);
 149         if (mdp4_kms->blank_cursor_bo)
 150                 drm_gem_object_unreference(mdp4_kms->blank_cursor_bo);
 151         kfree(mdp4_kms);
 152 }
 153
 154 static const struct mdp_kms_funcs kms_funcs = {
 155         .base = {
 156                 .hw_init         = mdp4_hw_init,
 157                 .irq_preinstall  = mdp4_irq_preinstall,
 158                 .irq_postinstall = mdp4_irq_postinstall,
 159                 .irq_uninstall   = mdp4_irq_uninstall,
 160                 .irq             = mdp4_irq,
 161                 .enable_vblank   = mdp4_enable_vblank,
 162                 .disable_vblank  = mdp4_disable_vblank,
 163                 .get_format      = mdp_get_format,
 164                 .round_pixclk    = mdp4_round_pixclk,
 165                 .preclose        = mdp4_preclose,
 166                 .destroy         = mdp4_destroy,
 167         },
 168         .set_irqmask         = mdp4_set_irqmask,
 169 };
 170
 171 int mdp4_disable(struct mdp4_kms *mdp4_kms)
 172 {
 173         DBG("");
 174
 175         clk_disable_unprepare(mdp4_kms->clk);
 176         if (mdp4_kms->pclk)
 177                 clk_disable_unprepare(mdp4_kms->pclk);
 178         clk_disable_unprepare(mdp4_kms->lut_clk);
 179
 180         return 0;
 181 }
 182
 183 int mdp4_enable(struct mdp4_kms *mdp4_kms)
 184 {
 185         DBG("");
 186
 187         clk_prepare_enable(mdp4_kms->clk);
 188         if (mdp4_kms->pclk)
 189                 clk_prepare_enable(mdp4_kms->pclk);
 190         clk_prepare_enable(mdp4_kms->lut_clk);
 191
 192         return 0;
 193 }
 194
 195 static int modeset_init(struct mdp4_kms *mdp4_kms)
 196 {
 197         struct drm_device *dev = mdp4_kms->dev;
 198         struct msm_drm_private *priv = dev->dev_private;
 199         struct drm_plane *plane;
 200         struct drm_crtc *crtc;
 201         struct drm_encoder *encoder;
 202         struct hdmi *hdmi;
 203         int ret;
 204
 205         /*
 206          *  NOTE: this is a bit simplistic until we add support
 207          * for more than just RGB1->DMA_E->DTV->HDMI
 208          */
 209
 210         /* construct non-private planes: */
 211         plane = mdp4_plane_init(dev, VG1, false);
 212         if (IS_ERR(plane)) {
 213                 dev_err(dev->dev, "failed to construct plane for VG1\n");
 214                 ret = PTR_ERR(plane);
 215                 goto fail;
 216         }
 217         priv->planes[priv->num_planes++] = plane;
 218
 219         plane = mdp4_plane_init(dev, VG2, false);
 220         if (IS_ERR(plane)) {
 221                 dev_err(dev->dev, "failed to construct plane for VG2\n");
 222                 ret = PTR_ERR(plane);
 223                 goto fail;
 224         }
 225         priv->planes[priv->num_planes++] = plane;
 226
 227         /* the CRTCs get constructed with a private plane: */
 228         plane = mdp4_plane_init(dev, RGB1, true);
 229         if (IS_ERR(plane)) {
 230                 dev_err(dev->dev, "failed to construct plane for RGB1\n");
 231                 ret = PTR_ERR(plane);
 232                 goto fail;
 233         }
 234
 235         crtc  = mdp4_crtc_init(dev, plane, priv->num_crtcs, 1, DMA_E);
 236         if (IS_ERR(crtc)) {
 237                 dev_err(dev->dev, "failed to construct crtc for DMA_E\n");
 238                 ret = PTR_ERR(crtc);
 239                 goto fail;
 240         }
 241         priv->crtcs[priv->num_crtcs++] = crtc;
 242
 243         encoder = mdp4_dtv_encoder_init(dev);
 244         if (IS_ERR(encoder)) {
 245                 dev_err(dev->dev, "failed to construct DTV encoder\n");
 246                 ret = PTR_ERR(encoder);
 247                 goto fail;
 248         }
 249         encoder->possible_crtcs = 0x1;     /* DTV can be hooked to DMA_E */
 250         priv->encoders[priv->num_encoders++] = encoder;
 251
 252         hdmi = hdmi_init(dev, encoder);
 253         if (IS_ERR(hdmi)) {
 254                 ret = PTR_ERR(hdmi);
 255                 dev_err(dev->dev, "failed to initialize HDMI: %d\n", ret);
 256                 goto fail;
 257         }
 258
 259         return 0;
 260
 261 fail:
 262         return ret;
 263 }
 264
 265 static const char *iommu_ports[] = {
 266                 "mdp_port0_cb0", "mdp_port1_cb0",
 267 };
 268
 269 struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 270 {
 271         struct platform_device *pdev = dev->platformdev;
 272         struct mdp4_platform_config *config = mdp4_get_config(pdev);
 273         struct mdp4_kms *mdp4_kms;
 274         struct msm_kms *kms = NULL;
 275         struct msm_mmu *mmu;
 276         int ret;
 277
 278         mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
 279         if (!mdp4_kms) {
 280                 dev_err(dev->dev, "failed to allocate kms\n");
 281                 ret = -ENOMEM;
 282                 goto fail;
 283         }
 284
 285         mdp_kms_init(&mdp4_kms->base, &kms_funcs);
 286
 287         kms = &mdp4_kms->base.base;
 288
 289         mdp4_kms->dev = dev;
 290
 291         mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
 292         if (IS_ERR(mdp4_kms->mmio)) {
 293                 ret = PTR_ERR(mdp4_kms->mmio);
 294                 goto fail;
 295         }
 296
 297         mdp4_kms->dsi_pll_vdda = devm_regulator_get(&pdev->dev, "dsi_pll_vdda");
 298         if (IS_ERR(mdp4_kms->dsi_pll_vdda))
 299                 mdp4_kms->dsi_pll_vdda = NULL;
 300
 301         mdp4_kms->dsi_pll_vddio = devm_regulator_get(&pdev->dev, "dsi_pll_vddio");
 302         if (IS_ERR(mdp4_kms->dsi_pll_vddio))
 303                 mdp4_kms->dsi_pll_vddio = NULL;
 304
 305         mdp4_kms->vdd = devm_regulator_get(&pdev->dev, "vdd");
 306         if (IS_ERR(mdp4_kms->vdd))
 307                 mdp4_kms->vdd = NULL;
 308
 309         if (mdp4_kms->vdd) {
 310                 ret = regulator_enable(mdp4_kms->vdd);
 311                 if (ret) {
 312                         dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
 313                         goto fail;
 314                 }
 315         }
 316
 317         mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
 318         if (IS_ERR(mdp4_kms->clk)) {
 319                 dev_err(dev->dev, "failed to get core_clk\n");
 320                 ret = PTR_ERR(mdp4_kms->clk);
 321                 goto fail;
 322         }
 323
 324         mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
 325         if (IS_ERR(mdp4_kms->pclk))
 326                 mdp4_kms->pclk = NULL;
 327
 328         // XXX if (rev >= MDP_REV_42) { ???
 329         mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
 330         if (IS_ERR(mdp4_kms->lut_clk)) {
 331                 dev_err(dev->dev, "failed to get lut_clk\n");
 332                 ret = PTR_ERR(mdp4_kms->lut_clk);
 333                 goto fail;
 334         }
 335
 336         clk_set_rate(mdp4_kms->clk, config->max_clk);
 337         clk_set_rate(mdp4_kms->lut_clk, config->max_clk);
 338
 339         /* make sure things are off before attaching iommu (bootloader could
 340          * have left things on, in which case we'll start getting faults if
 341          * we don't disable):
 342          */
 343         mdp4_enable(mdp4_kms);
 344         mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
 345         mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
 346         mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
 347         mdp4_disable(mdp4_kms);
 348         mdelay(16);
 349
 350         if (config->iommu) {
 351                 mmu = msm_iommu_new(dev, config->iommu);
 352                 if (IS_ERR(mmu)) {
 353                         ret = PTR_ERR(mmu);
 354                         goto fail;
 355                 }
 356                 ret = mmu->funcs->attach(mmu, iommu_ports,
 357                                 ARRAY_SIZE(iommu_ports));
 358                 if (ret)
 359                         goto fail;
 360         } else {
 361                 dev_info(dev->dev, "no iommu, fallback to phys "
 362                                 "contig buffers for scanout\n");
 363                 mmu = NULL;
 364         }
 365
 366         mdp4_kms->id = msm_register_mmu(dev, mmu);
 367         if (mdp4_kms->id < 0) {
 368                 ret = mdp4_kms->id;
 369                 dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
 370                 goto fail;
 371         }
 372
 373         ret = modeset_init(mdp4_kms);
 374         if (ret) {
 375                 dev_err(dev->dev, "modeset_init failed: %d\n", ret);
 376                 goto fail;
 377         }
 378
 379         mutex_lock(&dev->struct_mutex);
 380         mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC);
 381         mutex_unlock(&dev->struct_mutex);
 382         if (IS_ERR(mdp4_kms->blank_cursor_bo)) {
 383                 ret = PTR_ERR(mdp4_kms->blank_cursor_bo);
 384                 dev_err(dev->dev, "could not allocate blank-cursor bo: %d\n", ret);
 385                 mdp4_kms->blank_cursor_bo = NULL;
 386                 goto fail;
 387         }
 388
 389         ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id,
 390                         &mdp4_kms->blank_cursor_iova);
 391         if (ret) {
 392                 dev_err(dev->dev, "could not pin blank-cursor bo: %d\n", ret);
 393                 goto fail;
 394         }
 395
 396         return kms;
 397
 398 fail:
 399         if (kms)
 400                 mdp4_destroy(kms);
 401         return ERR_PTR(ret);
 402 }
 403
 404 static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
 405 {
 406         static struct mdp4_platform_config config = {};
 407 #ifdef CONFIG_OF
 408         /* TODO */
 409 #else
 410         if (cpu_is_apq8064())
 411                 config.max_clk = 266667000;
 412         else
 413                 config.max_clk = 200000000;
 414
 415         config.iommu = msm_get_iommu_domain(DISPLAY_READ_DOMAIN);
 416 #endif
 417         return &config;
 418 }