drivers/gpu/drm/exynos/exynos_drm_core.c

   1 /* exynos_drm_core.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Author:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the next
  17  * paragraph) shall be included in all copies or substantial portions of the
  18  * Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26  * OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include <drm/drmP.h>
  30 #include "exynos_drm_drv.h"
  31 #include "exynos_drm_encoder.h"
  32 #include "exynos_drm_connector.h"
  33 #include "exynos_drm_fbdev.h"
  34
  35 static LIST_HEAD(exynos_drm_subdrv_list);
  36
  37 static int exynos_drm_subdrv_probe(struct drm_device *dev,
  38                                         struct exynos_drm_subdrv *subdrv)
  39 {
  40         struct drm_encoder *encoder;
  41         struct drm_connector *connector;
  42
  43         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  44
  45         if (subdrv->probe) {
  46                 int ret;
  47
  48                 /*
  49                  * this probe callback would be called by sub driver
  50                  * after setting of all resources to this sub driver,
  51                  * such as clock, irq and register map are done or by load()
  52                  * of exynos drm driver.
  53                  *
  54                  * P.S. note that this driver is considered for modularization.
  55                  */
  56                 ret = subdrv->probe(dev, subdrv->dev);
  57                 if (ret)
  58                         return ret;
  59         }
  60
  61         if (!subdrv->manager)
  62                 return 0;
  63
  64         subdrv->manager->dev = subdrv->dev;
  65
  66         /* create and initialize a encoder for this sub driver. */
  67         encoder = exynos_drm_encoder_create(dev, subdrv->manager,
  68                         (1 << MAX_CRTC) - 1);
  69         if (!encoder) {
  70                 DRM_ERROR("failed to create encoder\n");
  71                 return -EFAULT;
  72         }
  73
  74         /*
  75          * create and initialize a connector for this sub driver and
  76          * attach the encoder created above to the connector.
  77          */
  78         connector = exynos_drm_connector_create(dev, encoder);
  79         if (!connector) {
  80                 DRM_ERROR("failed to create connector\n");
  81                 encoder->funcs->destroy(encoder);
  82                 return -EFAULT;
  83         }
  84
  85         subdrv->encoder = encoder;
  86         subdrv->connector = connector;
  87
  88         return 0;
  89 }
  90
  91 static void exynos_drm_subdrv_remove(struct drm_device *dev,
  92                                       struct exynos_drm_subdrv *subdrv)
  93 {
  94         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  95
  96         if (subdrv->remove)
  97                 subdrv->remove(dev);
  98
  99         if (subdrv->encoder) {
 100                 struct drm_encoder *encoder = subdrv->encoder;
 101                 encoder->funcs->destroy(encoder);
 102                 subdrv->encoder = NULL;
 103         }
 104
 105         if (subdrv->connector) {
 106                 struct drm_connector *connector = subdrv->connector;
 107                 connector->funcs->destroy(connector);
 108                 subdrv->connector = NULL;
 109         }
 110 }
 111
 112 int exynos_drm_device_register(struct drm_device *dev)
 113 {
 114         struct exynos_drm_subdrv *subdrv, *n;
 115         int err;
 116
 117         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 118
 119         if (!dev)
 120                 return -EINVAL;
 121
 122         list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) {
 123                 subdrv->drm_dev = dev;
 124                 err = exynos_drm_subdrv_probe(dev, subdrv);
 125                 if (err) {
 126                         DRM_DEBUG("exynos drm subdrv probe failed.\n");
 127                         list_del(&subdrv->list);
 128                 }
 129         }
 130
 131         return 0;
 132 }
 133 EXPORT_SYMBOL_GPL(exynos_drm_device_register);
 134
 135 int exynos_drm_device_unregister(struct drm_device *dev)
 136 {
 137         struct exynos_drm_subdrv *subdrv;
 138
 139         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 140
 141         if (!dev) {
 142                 WARN(1, "Unexpected drm device unregister!\n");
 143                 return -EINVAL;
 144         }
 145
 146         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list)
 147                 exynos_drm_subdrv_remove(dev, subdrv);
 148
 149         return 0;
 150 }
 151 EXPORT_SYMBOL_GPL(exynos_drm_device_unregister);
 152
 153 int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
 154 {
 155         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 156
 157         if (!subdrv)
 158                 return -EINVAL;
 159
 160         list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
 161
 162         return 0;
 163 }
 164 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register);
 165
 166 int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
 167 {
 168         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 169
 170         if (!subdrv)
 171                 return -EINVAL;
 172
 173         list_del(&subdrv->list);
 174
 175         return 0;
 176 }
 177 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister);
 178
 179 int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file)
 180 {
 181         struct exynos_drm_subdrv *subdrv;
 182         int ret;
 183
 184         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
 185                 if (subdrv->open) {
 186                         ret = subdrv->open(dev, subdrv->dev, file);
 187                         if (ret)
 188                                 goto err;
 189                 }
 190         }
 191
 192         return 0;
 193
 194 err:
 195         list_for_each_entry_reverse(subdrv, &subdrv->list, list) {
 196                 if (subdrv->close)
 197                         subdrv->close(dev, subdrv->dev, file);
 198         }
 199         return ret;
 200 }
 201 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_open);
 202
 203 void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file)
 204 {
 205         struct exynos_drm_subdrv *subdrv;
 206
 207         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
 208                 if (subdrv->close)
 209                         subdrv->close(dev, subdrv->dev, file);
 210         }
 211 }
 212 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_close);