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 | RCAR_DU_FEATURE_DEFR8,
  60         .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
  61         .num_crtcs = 3,
  62         .routes = {
  63                 /* R8A7790 has one RGB output, two LVDS outputs and one
  64                  * (currently unsupported) TCON output.
  65                  */
  66                 [RCAR_DU_OUTPUT_DPAD0] = {
  67                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
  68                         .encoder_type = DRM_MODE_ENCODER_NONE,
  69                         .port = 0,
  70                 },
  71                 [RCAR_DU_OUTPUT_LVDS0] = {
  72                         .possible_crtcs = BIT(0),
  73                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  74                         .port = 1,
  75                 },
  76                 [RCAR_DU_OUTPUT_LVDS1] = {
  77                         .possible_crtcs = BIT(2) | BIT(1),
  78                         .encoder_type = DRM_MODE_ENCODER_LVDS,
  79                         .port = 2,
  80                 },
  81         },
  82         .num_lvds = 2,
  83         .drgbs_bit = 0,
  84         .max_xres = 1920,
  85         .max_yres = 1080,
  86         .interlace = false,
  87 };
  88
  89 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  90         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
  91         .num_crtcs = 2,
  92         .routes = {
  93                 /* R8A7791 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),
  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         .drgbs_bit = 1,
 109         .max_xres = 1920,
 110         .max_yres = 1080,
 111         .interlace = true,
 112 };
 113
 114 static const struct platform_device_id rcar_du_id_table[] = {
 115         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 116         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 117         { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
 118         { }
 119 };
 120
 121 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 122
 123 static const struct of_device_id rcar_du_of_table[] = {
 124         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 125         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 126         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 127         { }
 128 };
 129
 130 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 131
 132 /* -----------------------------------------------------------------------------
 133  * DRM operations
 134  */
 135
 136 static int rcar_du_unload(struct drm_device *dev)
 137 {
 138         struct rcar_du_device *rcdu = dev->dev_private;
 139
 140         if (rcdu->fbdev)
 141                 drm_fbdev_cma_fini(rcdu->fbdev);
 142
 143         drm_kms_helper_poll_fini(dev);
 144         drm_mode_config_cleanup(dev);
 145         drm_vblank_cleanup(dev);
 146
 147         dev->irq_enabled = 0;
 148         dev->dev_private = NULL;
 149
 150         return 0;
 151 }
 152
 153 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 154 {
 155         struct platform_device *pdev = dev->platformdev;
 156         struct device_node *np = pdev->dev.of_node;
 157         struct rcar_du_device *rcdu;
 158         struct resource *mem;
 159         int ret;
 160
 161         if (np == NULL) {
 162                 dev_err(dev->dev, "no platform data\n");
 163                 return -ENODEV;
 164         }
 165
 166         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 167         if (rcdu == NULL) {
 168                 dev_err(dev->dev, "failed to allocate private data\n");
 169                 return -ENOMEM;
 170         }
 171
 172         rcdu->dev = &pdev->dev;
 173         rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
 174                    : (void *)platform_get_device_id(pdev)->driver_data;
 175         rcdu->ddev = dev;
 176         dev->dev_private = rcdu;
 177
 178         /* I/O resources */
 179         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 180         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 181         if (IS_ERR(rcdu->mmio))
 182                 return PTR_ERR(rcdu->mmio);
 183
 184         /* DRM/KMS objects */
 185         ret = rcar_du_modeset_init(rcdu);
 186         if (ret < 0) {
 187                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
 188                 goto done;
 189         }
 190
 191         /* vblank handling */
 192         ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
 193         if (ret < 0) {
 194                 dev_err(&pdev->dev, "failed to initialize vblank\n");
 195                 goto done;
 196         }
 197
 198         dev->irq_enabled = 1;
 199
 200         platform_set_drvdata(pdev, rcdu);
 201
 202 done:
 203         if (ret)
 204                 rcar_du_unload(dev);
 205
 206         return ret;
 207 }
 208
 209 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 210 {
 211         struct rcar_du_device *rcdu = dev->dev_private;
 212         unsigned int i;
 213
 214         for (i = 0; i < rcdu->num_crtcs; ++i)
 215                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 216 }
 217
 218 static void rcar_du_lastclose(struct drm_device *dev)
 219 {
 220         struct rcar_du_device *rcdu = dev->dev_private;
 221
 222         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 223 }
 224
 225 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 226 {
 227         struct rcar_du_device *rcdu = dev->dev_private;
 228
 229         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 230
 231         return 0;
 232 }
 233
 234 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 235 {
 236         struct rcar_du_device *rcdu = dev->dev_private;
 237
 238         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 239 }
 240
 241 static const struct file_operations rcar_du_fops = {
 242         .owner          = THIS_MODULE,
 243         .open           = drm_open,
 244         .release        = drm_release,
 245         .unlocked_ioctl = drm_ioctl,
 246 #ifdef CONFIG_COMPAT
 247         .compat_ioctl   = drm_compat_ioctl,
 248 #endif
 249         .poll           = drm_poll,
 250         .read           = drm_read,
 251         .llseek         = no_llseek,
 252         .mmap           = drm_gem_cma_mmap,
 253 };
 254
 255 static struct drm_driver rcar_du_driver = {
 256         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 257         .load                   = rcar_du_load,
 258         .unload                 = rcar_du_unload,
 259         .preclose               = rcar_du_preclose,
 260         .lastclose              = rcar_du_lastclose,
 261         .get_vblank_counter     = drm_vblank_count,
 262         .enable_vblank          = rcar_du_enable_vblank,
 263         .disable_vblank         = rcar_du_disable_vblank,
 264         .gem_free_object        = drm_gem_cma_free_object,
 265         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 266         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 267         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 268         .gem_prime_import       = drm_gem_prime_import,
 269         .gem_prime_export       = drm_gem_prime_export,
 270         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 271         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 272         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 273         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 274         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 275         .dumb_create            = rcar_du_dumb_create,
 276         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 277         .dumb_destroy           = drm_gem_dumb_destroy,
 278         .fops                   = &rcar_du_fops,
 279         .name                   = "rcar-du",
 280         .desc                   = "Renesas R-Car Display Unit",
 281         .date                   = "20130110",
 282         .major                  = 1,
 283         .minor                  = 0,
 284 };
 285
 286 /* -----------------------------------------------------------------------------
 287  * Power management
 288  */
 289
 290 #ifdef CONFIG_PM_SLEEP
 291 static int rcar_du_pm_suspend(struct device *dev)
 292 {
 293         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 294
 295         drm_kms_helper_poll_disable(rcdu->ddev);
 296         /* TODO Suspend the CRTC */
 297
 298         return 0;
 299 }
 300
 301 static int rcar_du_pm_resume(struct device *dev)
 302 {
 303         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 304
 305         /* TODO Resume the CRTC */
 306
 307         drm_kms_helper_poll_enable(rcdu->ddev);
 308         return 0;
 309 }
 310 #endif
 311
 312 static const struct dev_pm_ops rcar_du_pm_ops = {
 313         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 314 };
 315
 316 /* -----------------------------------------------------------------------------
 317  * Platform driver
 318  */
 319
 320 static int rcar_du_probe(struct platform_device *pdev)
 321 {
 322         return drm_platform_init(&rcar_du_driver, pdev);
 323 }
 324
 325 static int rcar_du_remove(struct platform_device *pdev)
 326 {
 327         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 328
 329         drm_put_dev(rcdu->ddev);
 330
 331         return 0;
 332 }
 333
 334 static struct platform_driver rcar_du_platform_driver = {
 335         .probe          = rcar_du_probe,
 336         .remove         = rcar_du_remove,
 337         .driver         = {
 338                 .name   = "rcar-du",
 339                 .pm     = &rcar_du_pm_ops,
 340                 .of_match_table = rcar_du_of_table,
 341         },
 342         .id_table       = rcar_du_id_table,
 343 };
 344
 345 module_platform_driver(rcar_du_platform_driver);
 346
 347 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 348 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 349 MODULE_LICENSE("GPL");