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 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  88         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
  89                   | RCAR_DU_FEATURE_EXT_CTRL_REGS,
  90         .num_crtcs = 2,
  91         .routes = {
  92                 /* R8A7791 has one RGB output, one LVDS output and one
  93                  * (currently unsupported) TCON output.
  94                  */
  95                 [RCAR_DU_OUTPUT_DPAD0] = {
  96                         .possible_crtcs = BIT(1),
  97                         .encoder_type = DRM_MODE_ENCODER_NONE,
  98                         .port = 0,
  99                 },
 100                 [RCAR_DU_OUTPUT_LVDS0] = {
 101                         .possible_crtcs = BIT(0),
 102                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 103                         .port = 1,
 104                 },
 105         },
 106         .num_lvds = 1,
 107 };
 108
 109 static const struct platform_device_id rcar_du_id_table[] = {
 110         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 111         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 112         { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
 113         { }
 114 };
 115
 116 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 117
 118 static const struct of_device_id rcar_du_of_table[] = {
 119         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 120         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 121         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 122         { }
 123 };
 124
 125 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 126
 127 /* -----------------------------------------------------------------------------
 128  * DRM operations
 129  */
 130
 131 static int rcar_du_unload(struct drm_device *dev)
 132 {
 133         struct rcar_du_device *rcdu = dev->dev_private;
 134
 135         if (rcdu->fbdev)
 136                 drm_fbdev_cma_fini(rcdu->fbdev);
 137
 138         drm_kms_helper_poll_fini(dev);
 139         drm_mode_config_cleanup(dev);
 140         drm_vblank_cleanup(dev);
 141
 142         dev->irq_enabled = 0;
 143         dev->dev_private = NULL;
 144
 145         return 0;
 146 }
 147
 148 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 149 {
 150         struct platform_device *pdev = dev->platformdev;
 151         struct device_node *np = pdev->dev.of_node;
 152         struct rcar_du_device *rcdu;
 153         struct resource *mem;
 154         int ret;
 155
 156         if (np == NULL) {
 157                 dev_err(dev->dev, "no platform data\n");
 158                 return -ENODEV;
 159         }
 160
 161         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 162         if (rcdu == NULL) {
 163                 dev_err(dev->dev, "failed to allocate private data\n");
 164                 return -ENOMEM;
 165         }
 166
 167         init_waitqueue_head(&rcdu->commit.wait);
 168
 169         rcdu->dev = &pdev->dev;
 170         rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
 171                    : (void *)platform_get_device_id(pdev)->driver_data;
 172         rcdu->ddev = dev;
 173         dev->dev_private = rcdu;
 174
 175         /* I/O resources */
 176         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 177         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 178         if (IS_ERR(rcdu->mmio))
 179                 return PTR_ERR(rcdu->mmio);
 180
 181         /* Initialize vertical blanking interrupts handling. Start with vblank
 182          * disabled for all CRTCs.
 183          */
 184         ret = drm_vblank_init(dev, (1 << rcdu->info->num_crtcs) - 1);
 185         if (ret < 0) {
 186                 dev_err(&pdev->dev, "failed to initialize vblank\n");
 187                 goto done;
 188         }
 189
 190         /* DRM/KMS objects */
 191         ret = rcar_du_modeset_init(rcdu);
 192         if (ret < 0) {
 193                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
 194                 goto done;
 195         }
 196
 197         dev->irq_enabled = 1;
 198
 199         platform_set_drvdata(pdev, rcdu);
 200
 201 done:
 202         if (ret)
 203                 rcar_du_unload(dev);
 204
 205         return ret;
 206 }
 207
 208 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 209 {
 210         struct rcar_du_device *rcdu = dev->dev_private;
 211         unsigned int i;
 212
 213         for (i = 0; i < rcdu->num_crtcs; ++i)
 214                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 215 }
 216
 217 static void rcar_du_lastclose(struct drm_device *dev)
 218 {
 219         struct rcar_du_device *rcdu = dev->dev_private;
 220
 221         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 222 }
 223
 224 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 225 {
 226         struct rcar_du_device *rcdu = dev->dev_private;
 227
 228         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 229
 230         return 0;
 231 }
 232
 233 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 234 {
 235         struct rcar_du_device *rcdu = dev->dev_private;
 236
 237         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 238 }
 239
 240 static const struct file_operations rcar_du_fops = {
 241         .owner          = THIS_MODULE,
 242         .open           = drm_open,
 243         .release        = drm_release,
 244         .unlocked_ioctl = drm_ioctl,
 245 #ifdef CONFIG_COMPAT
 246         .compat_ioctl   = drm_compat_ioctl,
 247 #endif
 248         .poll           = drm_poll,
 249         .read           = drm_read,
 250         .llseek         = no_llseek,
 251         .mmap           = drm_gem_cma_mmap,
 252 };
 253
 254 static struct drm_driver rcar_du_driver = {
 255         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
 256                                 | DRIVER_ATOMIC,
 257         .load                   = rcar_du_load,
 258         .unload                 = rcar_du_unload,
 259         .preclose               = rcar_du_preclose,
 260         .lastclose              = rcar_du_lastclose,
 261         .set_busid              = drm_platform_set_busid,
 262         .get_vblank_counter     = drm_vblank_count,
 263         .enable_vblank          = rcar_du_enable_vblank,
 264         .disable_vblank         = rcar_du_disable_vblank,
 265         .gem_free_object        = drm_gem_cma_free_object,
 266         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 267         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 268         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 269         .gem_prime_import       = drm_gem_prime_import,
 270         .gem_prime_export       = drm_gem_prime_export,
 271         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 272         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 273         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 274         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 275         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 276         .dumb_create            = rcar_du_dumb_create,
 277         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 278         .dumb_destroy           = drm_gem_dumb_destroy,
 279         .fops                   = &rcar_du_fops,
 280         .name                   = "rcar-du",
 281         .desc                   = "Renesas R-Car Display Unit",
 282         .date                   = "20130110",
 283         .major                  = 1,
 284         .minor                  = 0,
 285 };
 286
 287 /* -----------------------------------------------------------------------------
 288  * Power management
 289  */
 290
 291 #ifdef CONFIG_PM_SLEEP
 292 static int rcar_du_pm_suspend(struct device *dev)
 293 {
 294         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 295
 296         drm_kms_helper_poll_disable(rcdu->ddev);
 297         /* TODO Suspend the CRTC */
 298
 299         return 0;
 300 }
 301
 302 static int rcar_du_pm_resume(struct device *dev)
 303 {
 304         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 305
 306         /* TODO Resume the CRTC */
 307
 308         drm_kms_helper_poll_enable(rcdu->ddev);
 309         return 0;
 310 }
 311 #endif
 312
 313 static const struct dev_pm_ops rcar_du_pm_ops = {
 314         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 315 };
 316
 317 /* -----------------------------------------------------------------------------
 318  * Platform driver
 319  */
 320
 321 static int rcar_du_probe(struct platform_device *pdev)
 322 {
 323         return drm_platform_init(&rcar_du_driver, pdev);
 324 }
 325
 326 static int rcar_du_remove(struct platform_device *pdev)
 327 {
 328         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 329
 330         drm_put_dev(rcdu->ddev);
 331
 332         return 0;
 333 }
 334
 335 static struct platform_driver rcar_du_platform_driver = {
 336         .probe          = rcar_du_probe,
 337         .remove         = rcar_du_remove,
 338         .driver         = {
 339                 .name   = "rcar-du",
 340                 .pm     = &rcar_du_pm_ops,
 341                 .of_match_table = rcar_du_of_table,
 342         },
 343         .id_table       = rcar_du_id_table,
 344 };
 345
 346 module_platform_driver(rcar_du_platform_driver);
 347
 348 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 349 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 350 MODULE_LICENSE("GPL");