2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
29 #include "drm_crtc_helper.h"
30 #include "radeon_drm.h"
31 #include "radeon_reg.h"
35 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
37 struct drm_device *dev = (struct drm_device *) arg;
38 struct radeon_device *rdev = dev->dev_private;
40 return radeon_irq_process(rdev);
44 * Handle hotplug events outside the interrupt handler proper.
46 static void radeon_hotplug_work_func(struct work_struct *work)
48 struct radeon_device *rdev = container_of(work, struct radeon_device,
50 struct drm_device *dev = rdev->ddev;
51 struct drm_mode_config *mode_config = &dev->mode_config;
52 struct drm_connector *connector;
54 if (mode_config->num_connector) {
55 list_for_each_entry(connector, &mode_config->connector_list, head)
56 radeon_connector_hotplug(connector);
58 /* Just fire off a uevent and let userspace tell us what to do */
59 drm_helper_hpd_irq_event(dev);
62 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
64 struct radeon_device *rdev = dev->dev_private;
67 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
69 /* Disable *all* interrupts */
70 rdev->irq.sw_int = false;
71 for (i = 0; i < rdev->num_crtc; i++)
72 rdev->irq.crtc_vblank_int[i] = false;
73 for (i = 0; i < 6; i++)
74 rdev->irq.hpd[i] = false;
77 radeon_irq_process(rdev);
80 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
82 struct radeon_device *rdev = dev->dev_private;
84 dev->max_vblank_count = 0x001fffff;
85 rdev->irq.sw_int = true;
90 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
92 struct radeon_device *rdev = dev->dev_private;
98 /* Disable *all* interrupts */
99 rdev->irq.sw_int = false;
100 for (i = 0; i < rdev->num_crtc; i++)
101 rdev->irq.crtc_vblank_int[i] = false;
102 for (i = 0; i < 6; i++)
103 rdev->irq.hpd[i] = false;
104 radeon_irq_set(rdev);
107 int radeon_irq_kms_init(struct radeon_device *rdev)
111 spin_lock_init(&rdev->irq.sw_lock);
112 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
117 rdev->msi_enabled = 0;
118 /* MSIs don't seem to work reliably on all IGP
119 * chips. Disable MSI on them for now.
121 if ((rdev->family >= CHIP_RV380) &&
122 (!(rdev->flags & RADEON_IS_IGP))) {
123 int ret = pci_enable_msi(rdev->pdev);
125 rdev->msi_enabled = 1;
126 DRM_INFO("radeon: using MSI.\n");
129 rdev->irq.installed = true;
130 r = drm_irq_install(rdev->ddev);
132 rdev->irq.installed = false;
135 DRM_INFO("radeon: irq initialized.\n");
139 void radeon_irq_kms_fini(struct radeon_device *rdev)
141 drm_vblank_cleanup(rdev->ddev);
142 if (rdev->irq.installed) {
143 drm_irq_uninstall(rdev->ddev);
144 rdev->irq.installed = false;
145 if (rdev->msi_enabled)
146 pci_disable_msi(rdev->pdev);
150 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
152 unsigned long irqflags;
154 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
155 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
156 rdev->irq.sw_int = true;
157 radeon_irq_set(rdev);
159 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
162 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
164 unsigned long irqflags;
166 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
167 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
168 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
169 rdev->irq.sw_int = false;
170 radeon_irq_set(rdev);
172 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);