LXR linux/drivers/gpu/drm/radeon/radeon_irq

   1/*
   2 * Copyright 2008 Advanced Micro Devices, Inc.
   3 * Copyright 2008 Red Hat Inc.
   4 * Copyright 2009 Jerome Glisse.
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a
   7 * copy of this software and associated documentation files (the "Software"),
   8 * to deal in the Software without restriction, including without limitation
   9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 * and/or sell copies of the Software, and to permit persons to whom the
  11 * Software is furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22 * OTHER DEALINGS IN THE SOFTWARE.
  23 *
  24 * Authors: Dave Airlie
  25 *          Alex Deucher
  26 *          Jerome Glisse
  27 */
  28#include "drmP.h"
  29#include "radeon_drm.h"
  30#include "radeon_reg.h"
  31#include "radeon.h"
  32#include "atom.h"
  33
  34irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
  35{
  36        struct drm_device *dev = (struct drm_device *) arg;
  37        struct radeon_device *rdev = dev->dev_private;
  38
  39        return radeon_irq_process(rdev);
  40}
  41
  42void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
  43{
  44        struct radeon_device *rdev = dev->dev_private;
  45        unsigned i;
  46
  47        /* Disable *all* interrupts */
  48        rdev->irq.sw_int = false;
  49        for (i = 0; i < 2; i++) {
  50                rdev->irq.crtc_vblank_int[i] = false;
  51        }
  52        radeon_irq_set(rdev);
  53        /* Clear bits */
  54        radeon_irq_process(rdev);
  55}
  56
  57int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
  58{
  59        struct radeon_device *rdev = dev->dev_private;
  60
  61        dev->max_vblank_count = 0x001fffff;
  62        rdev->irq.sw_int = true;
  63        radeon_irq_set(rdev);
  64        return 0;
  65}
  66
  67void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
  68{
  69        struct radeon_device *rdev = dev->dev_private;
  70        unsigned i;
  71
  72        if (rdev == NULL) {
  73                return;
  74        }
  75        /* Disable *all* interrupts */
  76        rdev->irq.sw_int = false;
  77        for (i = 0; i < 2; i++) {
  78                rdev->irq.crtc_vblank_int[i] = false;
  79        }
  80        radeon_irq_set(rdev);
  81}
  82
  83int radeon_irq_kms_init(struct radeon_device *rdev)
  84{
  85        int r = 0;
  86        int num_crtc = 2;
  87
  88        if (rdev->flags & RADEON_SINGLE_CRTC)
  89                num_crtc = 1;
  90
  91        r = drm_vblank_init(rdev->ddev, num_crtc);
  92        if (r) {
  93                return r;
  94        }
  95        /* enable msi */
  96        rdev->msi_enabled = 0;
  97        if (rdev->family >= CHIP_RV380) {
  98                int ret = pci_enable_msi(rdev->pdev);
  99                if (!ret)
 100                        rdev->msi_enabled = 1;
 101        }
 102        drm_irq_install(rdev->ddev);
 103        rdev->irq.installed = true;
 104        DRM_INFO("radeon: irq initialized.\n");
 105        return 0;
 106}
 107
 108void radeon_irq_kms_fini(struct radeon_device *rdev)
 109{
 110        if (rdev->irq.installed) {
 111                rdev->irq.installed = false;
 112                drm_irq_uninstall(rdev->ddev);
 113                if (rdev->msi_enabled)
 114                        pci_disable_msi(rdev->pdev);
 115        }
 116}
 117