kernel/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) 2013-2014 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_crtc.h"
  30 #include "rcar_du_drv.h"
  31 #include "rcar_du_kms.h"
  32 #include "rcar_du_regs.h"
  33
  34 /* -----------------------------------------------------------------------------
  35  * Device Information
  36  */
  37
  38 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
  39         .features = 0,
  40         .num_crtcs = 2,
  41         .routes = {
  42                 /* R8A7779 has two RGB outputs and one (currently unsupported)
  43                  * TCON output.
  44                  */
  45                 [RCAR_DU_OUTPUT_DPAD0] = {
  46                         .possible_crtcs = BIT(0),
  47                         .encoder_type = DRM_MODE_ENCODER_NONE,
  48                         .port = 0,
  49                 },
  50                 [RCAR_DU_OUTPUT_DPAD1] = {
  51                         .possible_crtcs = BIT(1) | BIT(0),
  52                         .encoder_type = DRM_MODE_ENCODER_NONE,
  53                         .port = 1,
  54                 },
  55         },
  56         .num_lvds = 0,
  57 };
  58
  59 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
  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                 /* R8A7790 has one RGB output, two LVDS outputs and one
  66                  * (currently unsupported) TCON output.
  67                  */
  68                 [RCAR_DU_OUTPUT_DPAD0] = {
  69                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
  70                         .encoder_type = DRM_MODE_ENCODER_NONE,
  71                         .port = 0,
  72                 },
  73                 [RCAR_DU_OUTPUT_LVDS0] = {
  74                         .possible_crtcs = BIT(0),
  75                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  76                         .port = 1,
  77                 },
  78                 [RCAR_DU_OUTPUT_LVDS1] = {
  79                         .possible_crtcs = BIT(2) | BIT(1),
  80                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  81                         .port = 2,
  82                 },
  83         },
  84         .num_lvds = 2,
  85 };
  86
  87 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
  88 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  89         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  90                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  91         .num_crtcs = 2,
  92         .routes = {
  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                         .encoder_type = DRM_MODE_ENCODER_NONE,
  99                         .port = 0,
 100                 },
 101                 [RCAR_DU_OUTPUT_LVDS0] = {
 102                         .possible_crtcs = BIT(0),
 103                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 104                         .port = 1,
 105                 },
 106         },
 107         .num_lvds = 1,
 108 };
 109
 110 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 111         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 112                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 113         .num_crtcs = 2,
 114         .routes = {
 115                 /* R8A7794 has two RGB outputs and one (currently unsupported)
 116                  * TCON output.
 117                  */
 118                 [RCAR_DU_OUTPUT_DPAD0] = {
 119                         .possible_crtcs = BIT(0),
 120                         .encoder_type = DRM_MODE_ENCODER_NONE,
 121                         .port = 0,
 122                 },
 123                 [RCAR_DU_OUTPUT_DPAD1] = {
 124                         .possible_crtcs = BIT(1),
 125                         .encoder_type = DRM_MODE_ENCODER_NONE,
 126                         .port = 1,
 127                 },
 128         },
 129         .num_lvds = 0,
 130 };
 131
 132 static const struct of_device_id rcar_du_of_table[] = {
 133         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 134         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 135         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 136         { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
 137         { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
 138         { }
 139 };
 140
 141 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 142
 143 /* -----------------------------------------------------------------------------
 144  * DRM operations
 145  */
 146
 147 static int rcar_du_unload(struct drm_device *dev)
 148 {
 149         struct rcar_du_device *rcdu = dev->dev_private;
 150
 151         if (rcdu->fbdev)
 152                 drm_fbdev_cma_fini(rcdu->fbdev);
 153
 154         drm_kms_helper_poll_fini(dev);
 155         drm_mode_config_cleanup(dev);
 156         drm_vblank_cleanup(dev);
 157
 158         dev->irq_enabled = 0;
 159         dev->dev_private = NULL;
 160
 161         return 0;
 162 }
 163
 164 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 165 {
 166         struct platform_device *pdev = dev->platformdev;
 167         struct device_node *np = pdev->dev.of_node;
 168         struct rcar_du_device *rcdu;
 169         struct resource *mem;
 170         int ret;
 171
 172         if (np == NULL) {
 173                 dev_err(dev->dev, "no platform data\n");
 174                 return -ENODEV;
 175         }
 176
 177         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 178         if (rcdu == NULL) {
 179                 dev_err(dev->dev, "failed to allocate private data\n");
 180                 return -ENOMEM;
 181         }
 182
 183         init_waitqueue_head(&rcdu->commit.wait);
 184
 185         rcdu->dev = &pdev->dev;
 186         rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
 187         rcdu->ddev = dev;
 188         dev->dev_private = rcdu;
 189
 190         /* I/O resources */
 191         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 192         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 193         if (IS_ERR(rcdu->mmio))
 194                 return PTR_ERR(rcdu->mmio);
 195
 196         /* Initialize vertical blanking interrupts handling. Start with vblank
 197          * disabled for all CRTCs.
 198          */
 199         ret = drm_vblank_init(dev, (1 << rcdu->info->num_crtcs) - 1);
 200         if (ret < 0) {
 201                 dev_err(&pdev->dev, "failed to initialize vblank\n");
 202                 goto done;
 203         }
 204
 205         /* DRM/KMS objects */
 206         ret = rcar_du_modeset_init(rcdu);
 207         if (ret < 0) {
 208                 dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
 209                 goto done;
 210         }
 211
 212         dev->irq_enabled = 1;
 213
 214         platform_set_drvdata(pdev, rcdu);
 215
 216 done:
 217         if (ret)
 218                 rcar_du_unload(dev);
 219
 220         return ret;
 221 }
 222
 223 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 224 {
 225         struct rcar_du_device *rcdu = dev->dev_private;
 226         unsigned int i;
 227
 228         for (i = 0; i < rcdu->num_crtcs; ++i)
 229                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 230 }
 231
 232 static void rcar_du_lastclose(struct drm_device *dev)
 233 {
 234         struct rcar_du_device *rcdu = dev->dev_private;
 235
 236         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 237 }
 238
 239 static int rcar_du_enable_vblank(struct drm_device *dev, unsigned int pipe)
 240 {
 241         struct rcar_du_device *rcdu = dev->dev_private;
 242
 243         rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], true);
 244
 245         return 0;
 246 }
 247
 248 static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
 249 {
 250         struct rcar_du_device *rcdu = dev->dev_private;
 251
 252         rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
 253 }
 254
 255 static const struct file_operations rcar_du_fops = {
 256         .owner          = THIS_MODULE,
 257         .open           = drm_open,
 258         .release        = drm_release,
 259         .unlocked_ioctl = drm_ioctl,
 260 #ifdef CONFIG_COMPAT
 261         .compat_ioctl   = drm_compat_ioctl,
 262 #endif
 263         .poll           = drm_poll,
 264         .read           = drm_read,
 265         .llseek         = no_llseek,
 266         .mmap           = drm_gem_cma_mmap,
 267 };
 268
 269 static struct drm_driver rcar_du_driver = {
 270         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 271                                 | DRIVER_ATOMIC,
 272         .load                   = rcar_du_load,
 273         .unload                 = rcar_du_unload,
 274         .preclose               = rcar_du_preclose,
 275         .lastclose              = rcar_du_lastclose,
 276         .set_busid              = drm_platform_set_busid,
 277         .get_vblank_counter     = drm_vblank_no_hw_counter,
 278         .enable_vblank          = rcar_du_enable_vblank,
 279         .disable_vblank         = rcar_du_disable_vblank,
 280         .gem_free_object        = drm_gem_cma_free_object,
 281         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 282         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 283         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 284         .gem_prime_import       = drm_gem_prime_import,
 285         .gem_prime_export       = drm_gem_prime_export,
 286         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 287         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 288         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 289         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 290         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 291         .dumb_create            = rcar_du_dumb_create,
 292         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 293         .dumb_destroy           = drm_gem_dumb_destroy,
 294         .fops                   = &rcar_du_fops,
 295         .name                   = "rcar-du",
 296         .desc                   = "Renesas R-Car Display Unit",
 297         .date                   = "20130110",
 298         .major                  = 1,
 299         .minor                  = 0,
 300 };
 301
 302 /* -----------------------------------------------------------------------------
 303  * Power management
 304  */
 305
 306 #ifdef CONFIG_PM_SLEEP
 307 static int rcar_du_pm_suspend(struct device *dev)
 308 {
 309         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 310
 311         drm_kms_helper_poll_disable(rcdu->ddev);
 312         /* TODO Suspend the CRTC */
 313
 314         return 0;
 315 }
 316
 317 static int rcar_du_pm_resume(struct device *dev)
 318 {
 319         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 320
 321         /* TODO Resume the CRTC */
 322
 323         drm_kms_helper_poll_enable(rcdu->ddev);
 324         return 0;
 325 }
 326 #endif
 327
 328 static const struct dev_pm_ops rcar_du_pm_ops = {
 329         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 330 };
 331
 332 /* -----------------------------------------------------------------------------
 333  * Platform driver
 334  */
 335
 336 static int rcar_du_probe(struct platform_device *pdev)
 337 {
 338         return drm_platform_init(&rcar_du_driver, pdev);
 339 }
 340
 341 static int rcar_du_remove(struct platform_device *pdev)
 342 {
 343         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 344
 345         drm_put_dev(rcdu->ddev);
 346
 347         return 0;
 348 }
 349
 350 static struct platform_driver rcar_du_platform_driver = {
 351         .probe          = rcar_du_probe,
 352         .remove         = rcar_du_remove,
 353         .driver         = {
 354                 .name   = "rcar-du",
 355                 .pm     = &rcar_du_pm_ops,
 356                 .of_match_table = rcar_du_of_table,
 357         },
 358 };
 359
 360 module_platform_driver(rcar_du_platform_driver);
 361
 362 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 363 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 364 MODULE_LICENSE("GPL");