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 Renesas 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/platform_device.h>
  19 #include <linux/pm.h>
  20 #include <linux/slab.h>
  21
  22 #include <drm/drmP.h>
  23 #include <drm/drm_crtc_helper.h>
  24 #include <drm/drm_fb_cma_helper.h>
  25 #include <drm/drm_gem_cma_helper.h>
  26
  27 #include "rcar_du_crtc.h"
  28 #include "rcar_du_drv.h"
  29 #include "rcar_du_kms.h"
  30 #include "rcar_du_regs.h"
  31
  32 /* -----------------------------------------------------------------------------
  33  * DRM operations
  34  */
  35
  36 static int rcar_du_unload(struct drm_device *dev)
  37 {
  38         struct rcar_du_device *rcdu = dev->dev_private;
  39
  40         if (rcdu->fbdev)
  41                 drm_fbdev_cma_fini(rcdu->fbdev);
  42
  43         drm_kms_helper_poll_fini(dev);
  44         drm_mode_config_cleanup(dev);
  45         drm_vblank_cleanup(dev);
  46
  47         dev->irq_enabled = 0;
  48         dev->dev_private = NULL;
  49
  50         return 0;
  51 }
  52
  53 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
  54 {
  55         struct platform_device *pdev = dev->platformdev;
  56         struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
  57         struct rcar_du_device *rcdu;
  58         struct resource *mem;
  59         int ret;
  60
  61         if (pdata == NULL) {
  62                 dev_err(dev->dev, "no platform data\n");
  63                 return -ENODEV;
  64         }
  65
  66         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
  67         if (rcdu == NULL) {
  68                 dev_err(dev->dev, "failed to allocate private data\n");
  69                 return -ENOMEM;
  70         }
  71
  72         rcdu->dev = &pdev->dev;
  73         rcdu->pdata = pdata;
  74         rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
  75         rcdu->ddev = dev;
  76         dev->dev_private = rcdu;
  77
  78         /* I/O resources */
  79         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  80         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
  81         if (IS_ERR(rcdu->mmio))
  82                 return PTR_ERR(rcdu->mmio);
  83
  84         /* DRM/KMS objects */
  85         ret = rcar_du_modeset_init(rcdu);
  86         if (ret < 0) {
  87                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
  88                 goto done;
  89         }
  90
  91         /* vblank handling */
  92         ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
  93         if (ret < 0) {
  94                 dev_err(&pdev->dev, "failed to initialize vblank\n");
  95                 goto done;
  96         }
  97
  98         dev->irq_enabled = 1;
  99
 100         platform_set_drvdata(pdev, rcdu);
 101
 102 done:
 103         if (ret)
 104                 rcar_du_unload(dev);
 105
 106         return ret;
 107 }
 108
 109 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 110 {
 111         struct rcar_du_device *rcdu = dev->dev_private;
 112         unsigned int i;
 113
 114         for (i = 0; i < rcdu->num_crtcs; ++i)
 115                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 116 }
 117
 118 static void rcar_du_lastclose(struct drm_device *dev)
 119 {
 120         struct rcar_du_device *rcdu = dev->dev_private;
 121
 122         drm_fbdev_cma_restore_mode(rcdu->fbdev);
 123 }
 124
 125 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 126 {
 127         struct rcar_du_device *rcdu = dev->dev_private;
 128
 129         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 130
 131         return 0;
 132 }
 133
 134 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 135 {
 136         struct rcar_du_device *rcdu = dev->dev_private;
 137
 138         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 139 }
 140
 141 static const struct file_operations rcar_du_fops = {
 142         .owner          = THIS_MODULE,
 143         .open           = drm_open,
 144         .release        = drm_release,
 145         .unlocked_ioctl = drm_ioctl,
 146 #ifdef CONFIG_COMPAT
 147         .compat_ioctl   = drm_compat_ioctl,
 148 #endif
 149         .poll           = drm_poll,
 150         .read           = drm_read,
 151         .llseek         = no_llseek,
 152         .mmap           = drm_gem_cma_mmap,
 153 };
 154
 155 static struct drm_driver rcar_du_driver = {
 156         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 157         .load                   = rcar_du_load,
 158         .unload                 = rcar_du_unload,
 159         .preclose               = rcar_du_preclose,
 160         .lastclose              = rcar_du_lastclose,
 161         .get_vblank_counter     = drm_vblank_count,
 162         .enable_vblank          = rcar_du_enable_vblank,
 163         .disable_vblank         = rcar_du_disable_vblank,
 164         .gem_free_object        = drm_gem_cma_free_object,
 165         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 166         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 167         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 168         .gem_prime_import       = drm_gem_prime_import,
 169         .gem_prime_export       = drm_gem_prime_export,
 170         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 171         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 172         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 173         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 174         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 175         .dumb_create            = rcar_du_dumb_create,
 176         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 177         .dumb_destroy           = drm_gem_dumb_destroy,
 178         .fops                   = &rcar_du_fops,
 179         .name                   = "rcar-du",
 180         .desc                   = "Renesas R-Car Display Unit",
 181         .date                   = "20130110",
 182         .major                  = 1,
 183         .minor                  = 0,
 184 };
 185
 186 /* -----------------------------------------------------------------------------
 187  * Power management
 188  */
 189
 190 #if CONFIG_PM_SLEEP
 191 static int rcar_du_pm_suspend(struct device *dev)
 192 {
 193         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 194
 195         drm_kms_helper_poll_disable(rcdu->ddev);
 196         /* TODO Suspend the CRTC */
 197
 198         return 0;
 199 }
 200
 201 static int rcar_du_pm_resume(struct device *dev)
 202 {
 203         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 204
 205         /* TODO Resume the CRTC */
 206
 207         drm_kms_helper_poll_enable(rcdu->ddev);
 208         return 0;
 209 }
 210 #endif
 211
 212 static const struct dev_pm_ops rcar_du_pm_ops = {
 213         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 214 };
 215
 216 /* -----------------------------------------------------------------------------
 217  * Platform driver
 218  */
 219
 220 static int rcar_du_probe(struct platform_device *pdev)
 221 {
 222         return drm_platform_init(&rcar_du_driver, pdev);
 223 }
 224
 225 static int rcar_du_remove(struct platform_device *pdev)
 226 {
 227         struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
 228
 229         drm_put_dev(rcdu->ddev);
 230
 231         return 0;
 232 }
 233
 234 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 235         .features = 0,
 236         .num_crtcs = 2,
 237         .routes = {
 238                 /* R8A7779 has two RGB outputs and one (currently unsupported)
 239                  * TCON output.
 240                  */
 241                 [RCAR_DU_OUTPUT_DPAD0] = {
 242                         .possible_crtcs = BIT(0),
 243                         .encoder_type = DRM_MODE_ENCODER_NONE,
 244                 },
 245                 [RCAR_DU_OUTPUT_DPAD1] = {
 246                         .possible_crtcs = BIT(1) | BIT(0),
 247                         .encoder_type = DRM_MODE_ENCODER_NONE,
 248                 },
 249         },
 250         .num_lvds = 0,
 251 };
 252
 253 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 254         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
 255         .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
 256         .num_crtcs = 3,
 257         .routes = {
 258                 /* R8A7790 has one RGB output, two LVDS outputs and one
 259                  * (currently unsupported) TCON output.
 260                  */
 261                 [RCAR_DU_OUTPUT_DPAD0] = {
 262                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
 263                         .encoder_type = DRM_MODE_ENCODER_NONE,
 264                 },
 265                 [RCAR_DU_OUTPUT_LVDS0] = {
 266                         .possible_crtcs = BIT(0),
 267                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 268                 },
 269                 [RCAR_DU_OUTPUT_LVDS1] = {
 270                         .possible_crtcs = BIT(2) | BIT(1),
 271                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 272                 },
 273         },
 274         .num_lvds = 2,
 275 };
 276
 277 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
 278         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
 279         .num_crtcs = 2,
 280         .routes = {
 281                 /* R8A7791 has one RGB output, one LVDS output and one
 282                  * (currently unsupported) TCON output.
 283                  */
 284                 [RCAR_DU_OUTPUT_DPAD0] = {
 285                         .possible_crtcs = BIT(1),
 286                         .encoder_type = DRM_MODE_ENCODER_NONE,
 287                 },
 288                 [RCAR_DU_OUTPUT_LVDS0] = {
 289                         .possible_crtcs = BIT(0),
 290                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 291                 },
 292         },
 293         .num_lvds = 1,
 294 };
 295
 296 static const struct platform_device_id rcar_du_id_table[] = {
 297         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 298         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 299         { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
 300         { }
 301 };
 302
 303 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 304
 305 static struct platform_driver rcar_du_platform_driver = {
 306         .probe          = rcar_du_probe,
 307         .remove         = rcar_du_remove,
 308         .driver         = {
 309                 .owner  = THIS_MODULE,
 310                 .name   = "rcar-du",
 311                 .pm     = &rcar_du_pm_ops,
 312         },
 313         .id_table       = rcar_du_id_table,
 314 };
 315
 316 module_platform_driver(rcar_du_platform_driver);
 317
 318 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 319 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 320 MODULE_LICENSE("GPL");