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 void rcar_du_lastclose(struct drm_device *dev)
 148 {
 149         struct rcar_du_device *rcdu = dev->dev_private;
 150
 151         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 152 }
 153
 154 static int rcar_du_enable_vblank(struct drm_device *dev, unsigned int pipe)
 155 {
 156         struct rcar_du_device *rcdu = dev->dev_private;
 157
 158         rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], true);
 159
 160         return 0;
 161 }
 162
 163 static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
 164 {
 165         struct rcar_du_device *rcdu = dev->dev_private;
 166
 167         rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
 168 }
 169
 170 static const struct file_operations rcar_du_fops = {
 171         .owner          = THIS_MODULE,
 172         .open           = drm_open,
 173         .release        = drm_release,
 174         .unlocked_ioctl = drm_ioctl,
 175 #ifdef CONFIG_COMPAT
 176         .compat_ioctl   = drm_compat_ioctl,
 177 #endif
 178         .poll           = drm_poll,
 179         .read           = drm_read,
 180         .llseek         = no_llseek,
 181         .mmap           = drm_gem_cma_mmap,
 182 };
 183
 184 static struct drm_driver rcar_du_driver = {
 185         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 186                                 | DRIVER_ATOMIC,
 187         .lastclose              = rcar_du_lastclose,
 188         .get_vblank_counter     = drm_vblank_no_hw_counter,
 189         .enable_vblank          = rcar_du_enable_vblank,
 190         .disable_vblank         = rcar_du_disable_vblank,
 191         .gem_free_object        = drm_gem_cma_free_object,
 192         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 193         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 194         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 195         .gem_prime_import       = drm_gem_prime_import,
 196         .gem_prime_export       = drm_gem_prime_export,
 197         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 198         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 199         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 200         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 201         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 202         .dumb_create            = rcar_du_dumb_create,
 203         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 204         .dumb_destroy           = drm_gem_dumb_destroy,
 205         .fops                   = &rcar_du_fops,
 206         .name                   = "rcar-du",
 207         .desc                   = "Renesas R-Car Display Unit",
 208         .date                   = "20130110",
 209         .major                  = 1,
 210         .minor                  = 0,
 211 };
 212
 213 /* -----------------------------------------------------------------------------
 214  * Power management
 215  */
 216
 217 #ifdef CONFIG_PM_SLEEP
 218 static int rcar_du_pm_suspend(struct device *dev)
 219 {
 220         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 221
 222         drm_kms_helper_poll_disable(rcdu->ddev);
 223         /* TODO Suspend the CRTC */
 224
 225         return 0;
 226 }
 227
 228 static int rcar_du_pm_resume(struct device *dev)
 229 {
 230         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 231
 232         /* TODO Resume the CRTC */
 233
 234         drm_kms_helper_poll_enable(rcdu->ddev);
 235         return 0;
 236 }
 237 #endif
 238
 239 static const struct dev_pm_ops rcar_du_pm_ops = {
 240         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 241 };
 242
 243 /* -----------------------------------------------------------------------------
 244  * Platform driver
 245  */
 246
 247 static int rcar_du_remove(struct platform_device *pdev)
 248 {
 249         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 250         struct drm_device *ddev = rcdu->ddev;
 251
 252         mutex_lock(&ddev->mode_config.mutex);
 253         drm_connector_unplug_all(ddev);
 254         mutex_unlock(&ddev->mode_config.mutex);
 255
 256         drm_dev_unregister(ddev);
 257
 258         if (rcdu->fbdev)
 259                 drm_fbdev_cma_fini(rcdu->fbdev);
 260
 261         drm_kms_helper_poll_fini(ddev);
 262         drm_mode_config_cleanup(ddev);
 263
 264         drm_dev_unref(ddev);
 265
 266         return 0;
 267 }
 268
 269 static int rcar_du_probe(struct platform_device *pdev)
 270 {
 271         struct device_node *np = pdev->dev.of_node;
 272         struct rcar_du_device *rcdu;
 273         struct drm_connector *connector;
 274         struct drm_device *ddev;
 275         struct resource *mem;
 276         int ret;
 277
 278         if (np == NULL) {
 279                 dev_err(&pdev->dev, "no device tree node\n");
 280                 return -ENODEV;
 281         }
 282
 283         /* Allocate and initialize the DRM and R-Car device structures. */
 284         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 285         if (rcdu == NULL)
 286                 return -ENOMEM;
 287
 288         init_waitqueue_head(&rcdu->commit.wait);
 289
 290         rcdu->dev = &pdev->dev;
 291         rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
 292
 293         platform_set_drvdata(pdev, rcdu);
 294
 295         /* I/O resources */
 296         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 297         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 298         if (IS_ERR(rcdu->mmio))
 299                 return PTR_ERR(rcdu->mmio);
 300
 301         /* DRM/KMS objects */
 302         ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
 303         if (!ddev)
 304                 return -ENOMEM;
 305
 306         drm_dev_set_unique(ddev, dev_name(&pdev->dev));
 307
 308         rcdu->ddev = ddev;
 309         ddev->dev_private = rcdu;
 310
 311         ret = rcar_du_modeset_init(rcdu);
 312         if (ret < 0) {
 313                 dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
 314                 goto error;
 315         }
 316
 317         ddev->irq_enabled = 1;
 318
 319         /* Register the DRM device with the core and the connectors with
 320          * sysfs.
 321          */
 322         ret = drm_dev_register(ddev, 0);
 323         if (ret)
 324                 goto error;
 325
 326         mutex_lock(&ddev->mode_config.mutex);
 327         drm_for_each_connector(connector, ddev) {
 328                 ret = drm_connector_register(connector);
 329                 if (ret < 0)
 330                         break;
 331         }
 332         mutex_unlock(&ddev->mode_config.mutex);
 333
 334         if (ret < 0)
 335                 goto error;
 336
 337         DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
 338
 339         return 0;
 340
 341 error:
 342         rcar_du_remove(pdev);
 343
 344         return ret;
 345 }
 346
 347 static struct platform_driver rcar_du_platform_driver = {
 348         .probe          = rcar_du_probe,
 349         .remove         = rcar_du_remove,
 350         .driver         = {
 351                 .name   = "rcar-du",
 352                 .pm     = &rcar_du_pm_ops,
 353                 .of_match_table = rcar_du_of_table,
 354         },
 355 };
 356
 357 module_platform_driver(rcar_du_platform_driver);
 358
 359 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 360 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 361 MODULE_LICENSE("GPL");