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 };
  84
  85 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
  86         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
  87         .num_crtcs = 2,
  88         .routes = {
  89                 /* R8A7791 has one RGB output, one LVDS output and one
  90                  * (currently unsupported) TCON output.
  91                  */
  92                 [RCAR_DU_OUTPUT_DPAD0] = {
  93                         .possible_crtcs = BIT(1),
  94                         .encoder_type = DRM_MODE_ENCODER_NONE,
  95                         .port = 0,
  96                 },
  97                 [RCAR_DU_OUTPUT_LVDS0] = {
  98                         .possible_crtcs = BIT(0),
  99                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 100                         .port = 1,
 101                 },
 102         },
 103         .num_lvds = 1,
 104 };
 105
 106 static const struct platform_device_id rcar_du_id_table[] = {
 107         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 108         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 109         { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
 110         { }
 111 };
 112
 113 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 114
 115 static const struct of_device_id rcar_du_of_table[] = {
 116         { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
 117         { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
 118         { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
 119         { }
 120 };
 121
 122 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
 123
 124 /* -----------------------------------------------------------------------------
 125  * DRM operations
 126  */
 127
 128 static int rcar_du_unload(struct drm_device *dev)
 129 {
 130         struct rcar_du_device *rcdu = dev->dev_private;
 131
 132         if (rcdu->fbdev)
 133                 drm_fbdev_cma_fini(rcdu->fbdev);
 134
 135         drm_kms_helper_poll_fini(dev);
 136         drm_mode_config_cleanup(dev);
 137         drm_vblank_cleanup(dev);
 138
 139         dev->irq_enabled = 0;
 140         dev->dev_private = NULL;
 141
 142         return 0;
 143 }
 144
 145 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
 146 {
 147         struct platform_device *pdev = dev->platformdev;
 148         struct device_node *np = pdev->dev.of_node;
 149         struct rcar_du_device *rcdu;
 150         struct resource *mem;
 151         int ret;
 152
 153         if (np == NULL) {
 154                 dev_err(dev->dev, "no platform data\n");
 155                 return -ENODEV;
 156         }
 157
 158         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
 159         if (rcdu == NULL) {
 160                 dev_err(dev->dev, "failed to allocate private data\n");
 161                 return -ENOMEM;
 162         }
 163
 164         rcdu->dev = &pdev->dev;
 165         rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
 166                    : (void *)platform_get_device_id(pdev)->driver_data;
 167         rcdu->ddev = dev;
 168         dev->dev_private = rcdu;
 169
 170         /* I/O resources */
 171         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 172         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
 173         if (IS_ERR(rcdu->mmio))
 174                 return PTR_ERR(rcdu->mmio);
 175
 176         /* DRM/KMS objects */
 177         ret = rcar_du_modeset_init(rcdu);
 178         if (ret < 0) {
 179                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
 180                 goto done;
 181         }
 182
 183         /* vblank handling */
 184         ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
 185         if (ret < 0) {
 186                 dev_err(&pdev->dev, "failed to initialize vblank\n");
 187                 goto done;
 188         }
 189
 190         dev->irq_enabled = 1;
 191
 192         platform_set_drvdata(pdev, rcdu);
 193
 194 done:
 195         if (ret)
 196                 rcar_du_unload(dev);
 197
 198         return ret;
 199 }
 200
 201 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 202 {
 203         struct rcar_du_device *rcdu = dev->dev_private;
 204         unsigned int i;
 205
 206         for (i = 0; i < rcdu->num_crtcs; ++i)
 207                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 208 }
 209
 210 static void rcar_du_lastclose(struct drm_device *dev)
 211 {
 212         struct rcar_du_device *rcdu = dev->dev_private;
 213
 214         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 215 }
 216
 217 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 218 {
 219         struct rcar_du_device *rcdu = dev->dev_private;
 220
 221         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 222
 223         return 0;
 224 }
 225
 226 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 227 {
 228         struct rcar_du_device *rcdu = dev->dev_private;
 229
 230         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 231 }
 232
 233 static const struct file_operations rcar_du_fops = {
 234         .owner          = THIS_MODULE,
 235         .open           = drm_open,
 236         .release        = drm_release,
 237         .unlocked_ioctl = drm_ioctl,
 238 #ifdef CONFIG_COMPAT
 239         .compat_ioctl   = drm_compat_ioctl,
 240 #endif
 241         .poll           = drm_poll,
 242         .read           = drm_read,
 243         .llseek         = no_llseek,
 244         .mmap           = drm_gem_cma_mmap,
 245 };
 246
 247 static struct drm_driver rcar_du_driver = {
 248         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 249         .load                   = rcar_du_load,
 250         .unload                 = rcar_du_unload,
 251         .preclose               = rcar_du_preclose,
 252         .lastclose              = rcar_du_lastclose,
 253         .set_busid              = drm_platform_set_busid,
 254         .get_vblank_counter     = drm_vblank_count,
 255         .enable_vblank          = rcar_du_enable_vblank,
 256         .disable_vblank         = rcar_du_disable_vblank,
 257         .gem_free_object        = drm_gem_cma_free_object,
 258         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 259         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 260         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 261         .gem_prime_import       = drm_gem_prime_import,
 262         .gem_prime_export       = drm_gem_prime_export,
 263         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 264         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 265         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 266         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 267         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 268         .dumb_create            = rcar_du_dumb_create,
 269         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 270         .dumb_destroy           = drm_gem_dumb_destroy,
 271         .fops                   = &rcar_du_fops,
 272         .name                   = "rcar-du",
 273         .desc                   = "Renesas R-Car Display Unit",
 274         .date                   = "20130110",
 275         .major                  = 1,
 276         .minor                  = 0,
 277 };
 278
 279 /* -----------------------------------------------------------------------------
 280  * Power management
 281  */
 282
 283 #ifdef CONFIG_PM_SLEEP
 284 static int rcar_du_pm_suspend(struct device *dev)
 285 {
 286         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 287
 288         drm_kms_helper_poll_disable(rcdu->ddev);
 289         /* TODO Suspend the CRTC */
 290
 291         return 0;
 292 }
 293
 294 static int rcar_du_pm_resume(struct device *dev)
 295 {
 296         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 297
 298         /* TODO Resume the CRTC */
 299
 300         drm_kms_helper_poll_enable(rcdu->ddev);
 301         return 0;
 302 }
 303 #endif
 304
 305 static const struct dev_pm_ops rcar_du_pm_ops = {
 306         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 307 };
 308
 309 /* -----------------------------------------------------------------------------
 310  * Platform driver
 311  */
 312
 313 static int rcar_du_probe(struct platform_device *pdev)
 314 {
 315         return drm_platform_init(&rcar_du_driver, pdev);
 316 }
 317
 318 static int rcar_du_remove(struct platform_device *pdev)
 319 {
 320         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 321
 322         drm_put_dev(rcdu->ddev);
 323
 324         return 0;
 325 }
 326
 327 static struct platform_driver rcar_du_platform_driver = {
 328         .probe          = rcar_du_probe,
 329         .remove         = rcar_du_remove,
 330         .driver         = {
 331                 .name   = "rcar-du",
 332                 .pm     = &rcar_du_pm_ops,
 333                 .of_match_table = rcar_du_of_table,
 334         },
 335         .id_table       = rcar_du_id_table,
 336 };
 337
 338 module_platform_driver(rcar_du_platform_driver);
 339
 340 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 341 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 342 MODULE_LICENSE("GPL");