drivers/gpu/drm/cirrus/cirrus_drv.c

   1 /*
   2  * Copyright 2012 Red Hat <mjg@redhat.com>
   3  *
   4  * This file is subject to the terms and conditions of the GNU General
   5  * Public License version 2. See the file COPYING in the main
   6  * directory of this archive for more details.
   7  *
   8  * Authors: Matthew Garrett
   9  *          Dave Airlie
  10  */
  11 #include <linux/module.h>
  12 #include <linux/console.h>
  13 #include <drm/drmP.h>
  14 #include <drm/drm_crtc_helper.h>
  15
  16 #include "cirrus_drv.h"
  17
  18 int cirrus_modeset = -1;
  19 int cirrus_bpp = 16;
  20
  21 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  22 module_param_named(modeset, cirrus_modeset, int, 0400);
  23 MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:16)");
  24 module_param_named(bpp, cirrus_bpp, int, 0400);
  25
  26 /*
  27  * This is the generic driver code. This binds the driver to the drm core,
  28  * which then performs further device association and calls our graphics init
  29  * functions
  30  */
  31
  32 static struct drm_driver driver;
  33
  34 /* only bind to the cirrus chip in qemu */
  35 static const struct pci_device_id pciidlist[] = {
  36         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446,
  37           PCI_SUBVENDOR_ID_REDHAT_QUMRANET, PCI_SUBDEVICE_ID_QEMU,
  38           0, 0, 0 },
  39         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
  40           0x0001, 0, 0, 0 },
  41         {0,}
  42 };
  43
  44
  45 static int cirrus_pci_probe(struct pci_dev *pdev,
  46                             const struct pci_device_id *ent)
  47 {
  48         int ret;
  49
  50         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "cirrusdrmfb");
  51         if (ret)
  52                 return ret;
  53
  54         return drm_get_pci_dev(pdev, ent, &driver);
  55 }
  56
  57 static void cirrus_pci_remove(struct pci_dev *pdev)
  58 {
  59         struct drm_device *dev = pci_get_drvdata(pdev);
  60
  61         drm_put_dev(dev);
  62 }
  63
  64 #ifdef CONFIG_PM_SLEEP
  65 static int cirrus_pm_suspend(struct device *dev)
  66 {
  67         struct pci_dev *pdev = to_pci_dev(dev);
  68         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  69         struct cirrus_device *cdev = drm_dev->dev_private;
  70
  71         drm_kms_helper_poll_disable(drm_dev);
  72
  73         if (cdev->mode_info.gfbdev) {
  74                 console_lock();
  75                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 1);
  76                 console_unlock();
  77         }
  78
  79         return 0;
  80 }
  81
  82 static int cirrus_pm_resume(struct device *dev)
  83 {
  84         struct pci_dev *pdev = to_pci_dev(dev);
  85         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  86         struct cirrus_device *cdev = drm_dev->dev_private;
  87
  88         drm_helper_resume_force_mode(drm_dev);
  89
  90         if (cdev->mode_info.gfbdev) {
  91                 console_lock();
  92                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 0);
  93                 console_unlock();
  94         }
  95
  96         drm_kms_helper_poll_enable(drm_dev);
  97         return 0;
  98 }
  99 #endif
 100
 101 static const struct file_operations cirrus_driver_fops = {
 102         .owner = THIS_MODULE,
 103         .open = drm_open,
 104         .release = drm_release,
 105         .unlocked_ioctl = drm_ioctl,
 106         .mmap = cirrus_mmap,
 107         .poll = drm_poll,
 108         .compat_ioctl = drm_compat_ioctl,
 109 };
 110 static struct drm_driver driver = {
 111         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 112         .load = cirrus_driver_load,
 113         .unload = cirrus_driver_unload,
 114         .fops = &cirrus_driver_fops,
 115         .name = DRIVER_NAME,
 116         .desc = DRIVER_DESC,
 117         .date = DRIVER_DATE,
 118         .major = DRIVER_MAJOR,
 119         .minor = DRIVER_MINOR,
 120         .patchlevel = DRIVER_PATCHLEVEL,
 121         .gem_free_object_unlocked = cirrus_gem_free_object,
 122         .dumb_create = cirrus_dumb_create,
 123         .dumb_map_offset = cirrus_dumb_mmap_offset,
 124 };
 125
 126 static const struct dev_pm_ops cirrus_pm_ops = {
 127         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 128                                 cirrus_pm_resume)
 129 };
 130
 131 static struct pci_driver cirrus_pci_driver = {
 132         .name = DRIVER_NAME,
 133         .id_table = pciidlist,
 134         .probe = cirrus_pci_probe,
 135         .remove = cirrus_pci_remove,
 136         .driver.pm = &cirrus_pm_ops,
 137 };
 138
 139 static int __init cirrus_init(void)
 140 {
 141         if (vgacon_text_force() && cirrus_modeset == -1)
 142                 return -EINVAL;
 143
 144         if (cirrus_modeset == 0)
 145                 return -EINVAL;
 146         return pci_register_driver(&cirrus_pci_driver);
 147 }
 148
 149 static void __exit cirrus_exit(void)
 150 {
 151         pci_unregister_driver(&cirrus_pci_driver);
 152 }
 153
 154 module_init(cirrus_init);
 155 module_exit(cirrus_exit);
 156
 157 MODULE_DEVICE_TABLE(pci, pciidlist);
 158 MODULE_AUTHOR(DRIVER_AUTHOR);
 159 MODULE_DESCRIPTION(DRIVER_DESC);
 160 MODULE_LICENSE("GPL");