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