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_gem_cma_helper.h>
  25
  26 #include "rcar_du_crtc.h"
  27 #include "rcar_du_drv.h"
  28 #include "rcar_du_kms.h"
  29 #include "rcar_du_regs.h"
  30
  31 /* -----------------------------------------------------------------------------
  32  * DRM operations
  33  */
  34
  35 static int rcar_du_unload(struct drm_device *dev)
  36 {
  37         drm_kms_helper_poll_fini(dev);
  38         drm_mode_config_cleanup(dev);
  39         drm_vblank_cleanup(dev);
  40
  41         dev->irq_enabled = 0;
  42         dev->dev_private = NULL;
  43
  44         return 0;
  45 }
  46
  47 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
  48 {
  49         struct platform_device *pdev = dev->platformdev;
  50         struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
  51         struct rcar_du_device *rcdu;
  52         struct resource *mem;
  53         int ret;
  54
  55         if (pdata == NULL) {
  56                 dev_err(dev->dev, "no platform data\n");
  57                 return -ENODEV;
  58         }
  59
  60         rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
  61         if (rcdu == NULL) {
  62                 dev_err(dev->dev, "failed to allocate private data\n");
  63                 return -ENOMEM;
  64         }
  65
  66         rcdu->dev = &pdev->dev;
  67         rcdu->pdata = pdata;
  68         rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
  69         rcdu->ddev = dev;
  70         dev->dev_private = rcdu;
  71
  72         /* I/O resources */
  73         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  74         rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
  75         if (IS_ERR(rcdu->mmio))
  76                 return PTR_ERR(rcdu->mmio);
  77
  78         /* DRM/KMS objects */
  79         ret = rcar_du_modeset_init(rcdu);
  80         if (ret < 0) {
  81                 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
  82                 goto done;
  83         }
  84
  85         /* vblank handling */
  86         ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
  87         if (ret < 0) {
  88                 dev_err(&pdev->dev, "failed to initialize vblank\n");
  89                 goto done;
  90         }
  91
  92         dev->irq_enabled = 1;
  93
  94         platform_set_drvdata(pdev, rcdu);
  95
  96 done:
  97         if (ret)
  98                 rcar_du_unload(dev);
  99
 100         return ret;
 101 }
 102
 103 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
 104 {
 105         struct rcar_du_device *rcdu = dev->dev_private;
 106         unsigned int i;
 107
 108         for (i = 0; i < rcdu->num_crtcs; ++i)
 109                 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
 110 }
 111
 112 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
 113 {
 114         struct rcar_du_device *rcdu = dev->dev_private;
 115
 116         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
 117
 118         return 0;
 119 }
 120
 121 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
 122 {
 123         struct rcar_du_device *rcdu = dev->dev_private;
 124
 125         rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
 126 }
 127
 128 static const struct file_operations rcar_du_fops = {
 129         .owner          = THIS_MODULE,
 130         .open           = drm_open,
 131         .release        = drm_release,
 132         .unlocked_ioctl = drm_ioctl,
 133 #ifdef CONFIG_COMPAT
 134         .compat_ioctl   = drm_compat_ioctl,
 135 #endif
 136         .poll           = drm_poll,
 137         .read           = drm_read,
 138         .fasync         = drm_fasync,
 139         .llseek         = no_llseek,
 140         .mmap           = drm_gem_cma_mmap,
 141 };
 142
 143 static struct drm_driver rcar_du_driver = {
 144         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
 145         .load                   = rcar_du_load,
 146         .unload                 = rcar_du_unload,
 147         .preclose               = rcar_du_preclose,
 148         .get_vblank_counter     = drm_vblank_count,
 149         .enable_vblank          = rcar_du_enable_vblank,
 150         .disable_vblank         = rcar_du_disable_vblank,
 151         .gem_free_object        = drm_gem_cma_free_object,
 152         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 153         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 154         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 155         .gem_prime_import       = drm_gem_prime_import,
 156         .gem_prime_export       = drm_gem_prime_export,
 157         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 158         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 159         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 160         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 161         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 162         .dumb_create            = rcar_du_dumb_create,
 163         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 164         .dumb_destroy           = drm_gem_cma_dumb_destroy,
 165         .fops                   = &rcar_du_fops,
 166         .name                   = "rcar-du",
 167         .desc                   = "Renesas R-Car Display Unit",
 168         .date                   = "20130110",
 169         .major                  = 1,
 170         .minor                  = 0,
 171 };
 172
 173 /* -----------------------------------------------------------------------------
 174  * Power management
 175  */
 176
 177 #if CONFIG_PM_SLEEP
 178 static int rcar_du_pm_suspend(struct device *dev)
 179 {
 180         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 181
 182         drm_kms_helper_poll_disable(rcdu->ddev);
 183         /* TODO Suspend the CRTC */
 184
 185         return 0;
 186 }
 187
 188 static int rcar_du_pm_resume(struct device *dev)
 189 {
 190         struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 191
 192         /* TODO Resume the CRTC */
 193
 194         drm_kms_helper_poll_enable(rcdu->ddev);
 195         return 0;
 196 }
 197 #endif
 198
 199 static const struct dev_pm_ops rcar_du_pm_ops = {
 200         SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
 201 };
 202
 203 /* -----------------------------------------------------------------------------
 204  * Platform driver
 205  */
 206
 207 static int rcar_du_probe(struct platform_device *pdev)
 208 {
 209         return drm_platform_init(&rcar_du_driver, pdev);
 210 }
 211
 212 static int rcar_du_remove(struct platform_device *pdev)
 213 {
 214         drm_platform_exit(&rcar_du_driver, pdev);
 215
 216         return 0;
 217 }
 218
 219 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 220         .features = 0,
 221         .num_crtcs = 2,
 222         .routes = {
 223                 /* R8A7779 has two RGB outputs and one (currently unsupported)
 224                  * TCON output.
 225                  */
 226                 [RCAR_DU_OUTPUT_DPAD0] = {
 227                         .possible_crtcs = BIT(0),
 228                         .encoder_type = DRM_MODE_ENCODER_NONE,
 229                 },
 230                 [RCAR_DU_OUTPUT_DPAD1] = {
 231                         .possible_crtcs = BIT(1) | BIT(0),
 232                         .encoder_type = DRM_MODE_ENCODER_NONE,
 233                 },
 234         },
 235 };
 236
 237 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 238         .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_ALIGN_128B
 239                   | RCAR_DU_FEATURE_DEFR8,
 240         .num_crtcs = 3,
 241         .routes = {
 242                 /* R8A7790 has one RGB output, two LVDS outputs and one
 243                  * (currently unsupported) TCON output.
 244                  */
 245                 [RCAR_DU_OUTPUT_DPAD0] = {
 246                         .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
 247                         .encoder_type = DRM_MODE_ENCODER_NONE,
 248                 },
 249                 [RCAR_DU_OUTPUT_LVDS0] = {
 250                         .possible_crtcs = BIT(0),
 251                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 252                 },
 253                 [RCAR_DU_OUTPUT_LVDS1] = {
 254                         .possible_crtcs = BIT(2) | BIT(1),
 255                         .encoder_type = DRM_MODE_ENCODER_LVDS,
 256                 },
 257         },
 258 };
 259
 260 static const struct platform_device_id rcar_du_id_table[] = {
 261         { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
 262         { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
 263         { }
 264 };
 265
 266 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
 267
 268 static struct platform_driver rcar_du_platform_driver = {
 269         .probe          = rcar_du_probe,
 270         .remove         = rcar_du_remove,
 271         .driver         = {
 272                 .owner  = THIS_MODULE,
 273                 .name   = "rcar-du",
 274                 .pm     = &rcar_du_pm_ops,
 275         },
 276         .id_table       = rcar_du_id_table,
 277 };
 278
 279 module_platform_driver(rcar_du_platform_driver);
 280
 281 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 282 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
 283 MODULE_LICENSE("GPL");