drivers/gpu/drm/rcar-du/rcar_du_drv.c

   1 /*
   2  * rcar_du_drv.c  --  R-Car Display Unit DRM driver
   3  *
   4  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/io.h>
  16 #include <linux/mm.h>
  17 #include <linux/module.h>
  18 #include <linux/of_device.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/pm.h>
  21 #include <linux/slab.h>
  22 #include <linux/wait.h>
  23
  24 #include <drm/drmP.h>
  25 #include <drm/drm_crtc_helper.h>
  26 #include <drm/drm_fb_cma_helper.h>
  27 #include <drm/drm_gem_cma_helper.h>
  28
  29 #include "rcar_du_drv.h"
  30 #include "rcar_du_kms.h"
  31 #include "rcar_du_regs.h"
  32
  33 /* -----------------------------------------------------------------------------
  34  * Device Information
  35  */
  36
  37 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
  38         .gen = 2,
  39         .features = 0,
  40         .num_crtcs = 2,
  41         .routes = {
  42                 /*
  43                  * R8A7779 has two RGB outputs and one (currently unsupported)
  44                  * TCON output.
  45                  */
  46                 [RCAR_DU_OUTPUT_DPAD0] = {
  47                         .possible_crtcs = BIT(0),
  48                         .port = 0,
  49                 },
  50                 [RCAR_DU_OUTPUT_DPAD1] = {
  51                         .possible_crtcs = BIT(1) | BIT(0),
  52                         .port = 1,
  53                 },
  54         },
  55         .num_lvds = 0,
  56 };
  57
  58 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
  59         .gen = 2,
  60         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  61                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  62         .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
  63         .num_crtcs = 3,
  64         .routes = {
  65                 /*
  66                  * R8A7790 has one RGB output, two LVDS outputs and one
  67                  * (currently unsupported) TCON output.
  68                  */
  69                 [RCAR_DU_OUTPUT_DPAD0] = {
  70                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
  71                         .port = 0,
  72                 },
  73                 [RCAR_DU_OUTPUT_LVDS0] = {
  74                         .possible_crtcs = BIT(0),
  75                         .port = 1,
  76                 },
  77                 [RCAR_DU_OUTPUT_LVDS1] = {
  78                         .possible_crtcs = BIT(2) | BIT(1),
  79                         .port = 2,
  80                 },
  81         },
  82         .num_lvds = 2,
  83 };
  84
  85 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
  86 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  87         .gen = 2,
  88         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  89                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  90         .num_crtcs = 2,
  91         .routes = {
  92                 /*
  93                  * R8A779[13] has one RGB output, one LVDS output and one
  94                  * (currently unsupported) TCON output.
  95                  */
  96                 [RCAR_DU_OUTPUT_DPAD0] = {
  97                         .possible_crtcs = BIT(1) | BIT(0),
  98                         .port = 0,
  99                 },
 100                 [RCAR_DU_OUTPUT_LVDS0] = {
 101                         .possible_crtcs = BIT(0),
 102                         .port = 1,
 103                 },
 104         },
 105         .num_lvds = 1,
 106 };
 107
 108 static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 109         .gen = 2,
 110         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 111                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 112         .num_crtcs = 2,
 113         .routes = {
 114                 /* R8A7792 has two RGB outputs. */
 115                 [RCAR_DU_OUTPUT_DPAD0] = {
 116                         .possible_crtcs = BIT(0),
 117                         .port = 0,
 118                 },
 119                 [RCAR_DU_OUTPUT_DPAD1] = {
 120                         .possible_crtcs = BIT(1),
 121                         .port = 1,
 122                 },
 123         },
 124         .num_lvds = 0,
 125 };
 126
 127 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 128         .gen = 2,
 129         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 130                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 131         .num_crtcs = 2,
 132         .routes = {
 133                 /*
 134                  * R8A7794 has two RGB outputs and one (currently unsupported)
 135                  * TCON output.
 136                  */
 137                 [RCAR_DU_OUTPUT_DPAD0] = {
 138                         .possible_crtcs = BIT(0),
 139                         .port = 0,
 140                 },
 141                 [RCAR_DU_OUTPUT_DPAD1] = {
 142                         .possible_crtcs = BIT(1),
 143                         .port = 1,
 144                 },
 145         },
 146         .num_lvds = 0,
 147 };
 148
 149 static const struct rcar_du_device_info rcar_du_r8a7795_info = {
 150         .gen = 3,
 151         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 152                   | RCAR_DU_FEATURE_EXT_CTRL_REGS
 153                   | RCAR_DU_FEATURE_VSP1_SOURCE,
 154         .num_crtcs = 4,
 155         .routes = {
 156                 /*
 157                  * R8A7795 has one RGB output, two HDMI outputs and one
 158                  * LVDS output.
 159                  */
 160                 [RCAR_DU_OUTPUT_DPAD0] = {
 161                         .possible_crtcs = BIT(3),
 162                         .port = 0,
 163                 },
 164                 [RCAR_DU_OUTPUT_HDMI0] = {
 165                         .possible_crtcs = BIT(1),
 166                         .port = 1,
 167                 },
 168                 [RCAR_DU_OUTPUT_HDMI1] = {
 169                         .possible_crtcs = BIT(2),
 170                         .port = 2,
 171                 },
 172                 [RCAR_DU_OUTPUT_LVDS0] = {
 173                         .possible_crtcs = BIT(0),
 174                         .port = 3,
 175                 },
 176         },
 177         .num_lvds = 1,
 178         .dpll_ch =  BIT(1) | BIT(2),
 179 };
 180
 181 static const struct rcar_du_device_info rcar_du_r8a7796_info = {
 182         .gen = 3,
 183         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 184                   | RCAR_DU_FEATURE_EXT_CTRL_REGS
 185                   | RCAR_DU_FEATURE_VSP1_SOURCE,
 186         .num_crtcs = 3,
 187         .routes = {
 188                 /*
 189                  * R8A7796 has one RGB output, one LVDS output and one HDMI
 190                  * output.
 191                  */
 192                 [RCAR_DU_OUTPUT_DPAD0] = {
 193                         .possible_crtcs = BIT(2),
 194                         .port = 0,
 195                 },
 196                 [RCAR_DU_OUTPUT_HDMI0] = {
 197                         .possible_crtcs = BIT(1),
 198                         .port = 1,
 199                 },
 200                 [RCAR_DU_OUTPUT_LVDS0] = {
 201                         .possible_crtcs = BIT(0),
 202                         .port = 2,
 203                 },
 204         },
 205         .num_lvds = 1,
 206         .dpll_ch =  BIT(1),
 207 };
 208
 209 static const struct of_device_id rcar_du_of_table[] = {
 210         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 211         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 212         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 213         { .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
 214         { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
 215         { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
 216         { .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
 217         { .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
 218         { }
 219 };
 220
 221 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 222
 223 /* -----------------------------------------------------------------------------
 224  * DRM operations
 225  */
 226
 227 static void rcar_du_lastclose(struct drm_device *dev)
 228 {
 229         struct rcar_du_device *rcdu = dev->dev_private;
 230
 231         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 232 }
 233
 234 DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
 235
 236 static struct drm_driver rcar_du_driver = {
 237         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 238                                 | DRIVER_ATOMIC,
 239         .lastclose              = rcar_du_lastclose,
 240         .gem_free_object_unlocked = drm_gem_cma_free_object,
 241         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 242         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 243         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 244         .gem_prime_import       = drm_gem_prime_import,
 245         .gem_prime_export       = drm_gem_prime_export,
 246         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 247         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 248         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 249         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 250         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 251         .dumb_create            = rcar_du_dumb_create,
 252         .fops                   = &rcar_du_fops,
 253         .name                   = "rcar-du",
 254         .desc                   = "Renesas R-Car Display Unit",
 255         .date                   = "20130110",
 256         .major                  = 1,
 257         .minor                  = 0,
 258 };
 259
 260 /* -----------------------------------------------------------------------------
 261  * Power management
 262  */
 263
 264 #ifdef CONFIG_PM_SLEEP
 265 static int rcar_du_pm_suspend(struct device *dev)
 266 {
 267         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 268
 269         drm_kms_helper_poll_disable(rcdu->ddev);
 270         /* TODO Suspend the CRTC */
 271
 272         return 0;
 273 }
 274
 275 static int rcar_du_pm_resume(struct device *dev)
 276 {
 277         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 278
 279         /* TODO Resume the CRTC */
 280
 281         drm_kms_helper_poll_enable(rcdu->ddev);
 282         return 0;
 283 }
 284 #endif
 285
 286 static const struct dev_pm_ops rcar_du_pm_ops = {
 287         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 288 };
 289
 290 /* -----------------------------------------------------------------------------
 291  * Platform driver
 292  */
 293
 294 static int rcar_du_remove(struct platform_device *pdev)
 295 {
 296         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 297         struct drm_device *ddev = rcdu->ddev;
 298
 299         drm_dev_unregister(ddev);
 300
 301         if (rcdu->fbdev)
 302                 drm_fbdev_cma_fini(rcdu->fbdev);
 303
 304         drm_kms_helper_poll_fini(ddev);
 305         drm_mode_config_cleanup(ddev);
 306
 307         drm_dev_unref(ddev);
 308
 309         return 0;
 310 }
 311
 312 static int rcar_du_probe(struct platform_device *pdev)
 313 {
 314         struct rcar_du_device *rcdu;
 315         struct drm_device *ddev;
 316         struct resource *mem;
 317         int ret;
 318
 319         /* Allocate and initialize the R-Car device structure. */
 320         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 321         if (rcdu == NULL)
 322                 return -ENOMEM;
 323
 324         rcdu->dev = &pdev->dev;
 325         rcdu->info = of_device_get_match_data(rcdu->dev);
 326
 327         platform_set_drvdata(pdev, rcdu);
 328
 329         /* I/O resources */
 330         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 331         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 332         if (IS_ERR(rcdu->mmio))
 333                 return PTR_ERR(rcdu->mmio);
 334
 335         /* DRM/KMS objects */
 336         ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
 337         if (IS_ERR(ddev))
 338                 return PTR_ERR(ddev);
 339
 340         rcdu->ddev = ddev;
 341         ddev->dev_private = rcdu;
 342
 343         ret = rcar_du_modeset_init(rcdu);
 344         if (ret < 0) {
 345                 if (ret != -EPROBE_DEFER)
 346                         dev_err(&pdev->dev,
 347                                 "failed to initialize DRM/KMS (%d)\n", ret);
 348                 goto error;
 349         }
 350
 351         ddev->irq_enabled = 1;
 352
 353         /*
 354          * Register the DRM device with the core and the connectors with
 355          * sysfs.
 356          */
 357         ret = drm_dev_register(ddev, 0);
 358         if (ret)
 359                 goto error;
 360
 361         DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
 362
 363         return 0;
 364
 365 error:
 366         rcar_du_remove(pdev);
 367
 368         return ret;
 369 }
 370
 371 static struct platform_driver rcar_du_platform_driver = {
 372         .probe          = rcar_du_probe,
 373         .remove         = rcar_du_remove,
 374         .driver         = {
 375                 .name   = "rcar-du",
 376                 .pm     = &rcar_du_pm_ops,
 377                 .of_match_table = rcar_du_of_table,
 378         },
 379 };
 380
 381 module_platform_driver(rcar_du_platform_driver);
 382
 383 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 384 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 385 MODULE_LICENSE("GPL");