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
  23 #include <drm/drmP.h>
  24 #include <drm/drm_crtc_helper.h>
  25 #include <drm/drm_fb_cma_helper.h>
  26 #include <drm/drm_gem_cma_helper.h>
  27
  28 #include "rcar_du_crtc.h"
  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         .features = 0,
  39         .num_crtcs = 2,
  40         .routes = {
  41                 /* R8A7779 has two RGB outputs and one (currently unsupported)
  42                  * TCON output.
  43                  */
  44                 [RCAR_DU_OUTPUT_DPAD0] = {
  45                         .possible_crtcs = BIT(0),
  46                         .encoder_type = DRM_MODE_ENCODER_NONE,
  47                         .port = 0,
  48                 },
  49                 [RCAR_DU_OUTPUT_DPAD1] = {
  50                         .possible_crtcs = BIT(1) | BIT(0),
  51                         .encoder_type = DRM_MODE_ENCODER_NONE,
  52                         .port = 1,
  53                 },
  54         },
  55         .num_lvds = 0,
  56 };
  57
  58 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
  59         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  60                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  61         .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
  62         .num_crtcs = 3,
  63         .routes = {
  64                 /* R8A7790 has one RGB output, two LVDS outputs and one
  65                  * (currently unsupported) TCON output.
  66                  */
  67                 [RCAR_DU_OUTPUT_DPAD0] = {
  68                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
  69                         .encoder_type = DRM_MODE_ENCODER_NONE,
  70                         .port = 0,
  71                 },
  72                 [RCAR_DU_OUTPUT_LVDS0] = {
  73                         .possible_crtcs = BIT(0),
  74                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  75                         .port = 1,
  76                 },
  77                 [RCAR_DU_OUTPUT_LVDS1] = {
  78                         .possible_crtcs = BIT(2) | BIT(1),
  79                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  80                         .port = 2,
  81                 },
  82         },
  83         .num_lvds = 2,
  84 };
  85
  86 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  87         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  88                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  89         .num_crtcs = 2,
  90         .routes = {
  91                 /* R8A7791 has one RGB output, one LVDS output and one
  92                  * (currently unsupported) TCON output.
  93                  */
  94                 [RCAR_DU_OUTPUT_DPAD0] = {
  95                         .possible_crtcs = BIT(1),
  96                         .encoder_type = DRM_MODE_ENCODER_NONE,
  97                         .port = 0,
  98                 },
  99                 [RCAR_DU_OUTPUT_LVDS0] = {
 100                         .possible_crtcs = BIT(0),
 101                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 102                         .port = 1,
 103                 },
 104         },
 105         .num_lvds = 1,
 106 };
 107
 108 static const struct platform_device_id rcar_du_id_table[] = {
 109         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 110         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 111         { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
 112         { }
 113 };
 114
 115 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 116
 117 static const struct of_device_id rcar_du_of_table[] = {
 118         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 119         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 120         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 121         { }
 122 };
 123
 124 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 125
 126 /* -----------------------------------------------------------------------------
 127  * DRM operations
 128  */
 129
 130 static int rcar_du_unload(struct drm_device *dev)
 131 {
 132         struct rcar_du_device *rcdu = dev->dev_private;
 133
 134         if (rcdu->fbdev)
 135                 drm_fbdev_cma_fini(rcdu->fbdev);
 136
 137         drm_kms_helper_poll_fini(dev);
 138         drm_mode_config_cleanup(dev);
 139         drm_vblank_cleanup(dev);
 140
 141         dev->irq_enabled = 0;
 142         dev->dev_private = NULL;
 143
 144         return 0;
 145 }
 146
 147 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 148 {
 149         struct platform_device *pdev = dev->platformdev;
 150         struct device_node *np = pdev->dev.of_node;
 151         struct rcar_du_device *rcdu;
 152         struct resource *mem;
 153         int ret;
 154
 155         if (np == NULL) {
 156                 dev_err(dev->dev, "no platform data\n");
 157                 return -ENODEV;
 158         }
 159
 160         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 161         if (rcdu == NULL) {
 162                 dev_err(dev->dev, "failed to allocate private data\n");
 163                 return -ENOMEM;
 164         }
 165
 166         rcdu->dev = &pdev->dev;
 167         rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
 168                    : (void *)platform_get_device_id(pdev)->driver_data;
 169         rcdu->ddev = dev;
 170         dev->dev_private = rcdu;
 171
 172         /* I/O resources */
 173         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 174         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 175         if (IS_ERR(rcdu->mmio))
 176                 return PTR_ERR(rcdu->mmio);
 177
 178         /* DRM/KMS objects */
 179         ret = rcar_du_modeset_init(rcdu);
 180         if (ret < 0) {
 181                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
 182                 goto done;
 183         }
 184
 185         /* vblank handling */
 186         ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
 187         if (ret < 0) {
 188                 dev_err(&pdev->dev, "failed to initialize vblank\n");
 189                 goto done;
 190         }
 191
 192         dev->irq_enabled = 1;
 193
 194         platform_set_drvdata(pdev, rcdu);
 195
 196 done:
 197         if (ret)
 198                 rcar_du_unload(dev);
 199
 200         return ret;
 201 }
 202
 203 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 204 {
 205         struct rcar_du_device *rcdu = dev->dev_private;
 206         unsigned int i;
 207
 208         for (i = 0; i < rcdu->num_crtcs; ++i)
 209                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 210 }
 211
 212 static void rcar_du_lastclose(struct drm_device *dev)
 213 {
 214         struct rcar_du_device *rcdu = dev->dev_private;
 215
 216         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 217 }
 218
 219 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 220 {
 221         struct rcar_du_device *rcdu = dev->dev_private;
 222
 223         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 224
 225         return 0;
 226 }
 227
 228 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 229 {
 230         struct rcar_du_device *rcdu = dev->dev_private;
 231
 232         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 233 }
 234
 235 static const struct file_operations rcar_du_fops = {
 236         .owner          = THIS_MODULE,
 237         .open           = drm_open,
 238         .release        = drm_release,
 239         .unlocked_ioctl = drm_ioctl,
 240 #ifdef CONFIG_COMPAT
 241         .compat_ioctl   = drm_compat_ioctl,
 242 #endif
 243         .poll           = drm_poll,
 244         .read           = drm_read,
 245         .llseek         = no_llseek,
 246         .mmap           = drm_gem_cma_mmap,
 247 };
 248
 249 static struct drm_driver rcar_du_driver = {
 250         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 251         .load                   = rcar_du_load,
 252         .unload                 = rcar_du_unload,
 253         .preclose               = rcar_du_preclose,
 254         .lastclose              = rcar_du_lastclose,
 255         .set_busid              = drm_platform_set_busid,
 256         .get_vblank_counter     = drm_vblank_count,
 257         .enable_vblank          = rcar_du_enable_vblank,
 258         .disable_vblank         = rcar_du_disable_vblank,
 259         .gem_free_object        = drm_gem_cma_free_object,
 260         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 261         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 262         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 263         .gem_prime_import       = drm_gem_prime_import,
 264         .gem_prime_export       = drm_gem_prime_export,
 265         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 266         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 267         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 268         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 269         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 270         .dumb_create            = rcar_du_dumb_create,
 271         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 272         .dumb_destroy           = drm_gem_dumb_destroy,
 273         .fops                   = &rcar_du_fops,
 274         .name                   = "rcar-du",
 275         .desc                   = "Renesas R-Car Display Unit",
 276         .date                   = "20130110",
 277         .major                  = 1,
 278         .minor                  = 0,
 279 };
 280
 281 /* -----------------------------------------------------------------------------
 282  * Power management
 283  */
 284
 285 #ifdef CONFIG_PM_SLEEP
 286 static int rcar_du_pm_suspend(struct device *dev)
 287 {
 288         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 289
 290         drm_kms_helper_poll_disable(rcdu->ddev);
 291         /* TODO Suspend the CRTC */
 292
 293         return 0;
 294 }
 295
 296 static int rcar_du_pm_resume(struct device *dev)
 297 {
 298         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 299
 300         /* TODO Resume the CRTC */
 301
 302         drm_kms_helper_poll_enable(rcdu->ddev);
 303         return 0;
 304 }
 305 #endif
 306
 307 static const struct dev_pm_ops rcar_du_pm_ops = {
 308         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 309 };
 310
 311 /* -----------------------------------------------------------------------------
 312  * Platform driver
 313  */
 314
 315 static int rcar_du_probe(struct platform_device *pdev)
 316 {
 317         return drm_platform_init(&rcar_du_driver, pdev);
 318 }
 319
 320 static int rcar_du_remove(struct platform_device *pdev)
 321 {
 322         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 323
 324         drm_put_dev(rcdu->ddev);
 325
 326         return 0;
 327 }
 328
 329 static struct platform_driver rcar_du_platform_driver = {
 330         .probe          = rcar_du_probe,
 331         .remove         = rcar_du_remove,
 332         .driver         = {
 333                 .name   = "rcar-du",
 334                 .pm     = &rcar_du_pm_ops,
 335                 .of_match_table = rcar_du_of_table,
 336         },
 337         .id_table       = rcar_du_id_table,
 338 };
 339
 340 module_platform_driver(rcar_du_platform_driver);
 341
 342 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 343 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 344 MODULE_LICENSE("GPL");