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 "radeon_drm.h"
30 #include "radeon_reg.h"
34 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
36 struct drm_device *dev = (struct drm_device *) arg;
37 struct radeon_device *rdev = dev->dev_private;
39 return radeon_irq_process(rdev);
43 * Handle hotplug events outside the interrupt handler proper.
45 static void radeon_hotplug_work_func(struct work_struct *work)
47 struct radeon_device *rdev = container_of(work, struct radeon_device,
49 struct drm_device *dev = rdev->ddev;
50 struct drm_mode_config *mode_config = &dev->mode_config;
51 struct drm_connector *connector;
53 if (mode_config->num_connector) {
54 list_for_each_entry(connector, &mode_config->connector_list, head)
55 radeon_connector_hotplug(connector);
57 /* Just fire off a uevent and let userspace tell us what to do */
58 drm_sysfs_hotplug_event(dev);
61 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
63 struct radeon_device *rdev = dev->dev_private;
66 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
68 /* Disable *all* interrupts */
69 rdev->irq.sw_int = false;
70 for (i = 0; i < rdev->num_crtc; i++)
71 rdev->irq.crtc_vblank_int[i] = false;
72 for (i = 0; i < 6; i++)
73 rdev->irq.hpd[i] = false;
76 radeon_irq_process(rdev);
79 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
81 struct radeon_device *rdev = dev->dev_private;
83 dev->max_vblank_count = 0x001fffff;
84 rdev->irq.sw_int = true;
89 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
91 struct radeon_device *rdev = dev->dev_private;
97 /* Disable *all* interrupts */
98 rdev->irq.sw_int = false;
99 for (i = 0; i < rdev->num_crtc; i++)
100 rdev->irq.crtc_vblank_int[i] = false;
101 for (i = 0; i < 6; i++)
102 rdev->irq.hpd[i] = false;
103 radeon_irq_set(rdev);
106 int radeon_irq_kms_init(struct radeon_device *rdev)
110 spin_lock_init(&rdev->irq.sw_lock);
111 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
116 rdev->msi_enabled = 0;
117 /* MSIs don't seem to work on my rs780;
118 * not sure about rs880 or other rs780s.
119 * Needs more investigation.
121 if ((rdev->family >= CHIP_RV380) &&
122 (rdev->family != CHIP_RS780) &&
123 (rdev->family != CHIP_RS880)) {
124 int ret = pci_enable_msi(rdev->pdev);
126 rdev->msi_enabled = 1;
127 DRM_INFO("radeon: using MSI.\n");
130 rdev->irq.installed = true;
131 r = drm_irq_install(rdev->ddev);
133 rdev->irq.installed = false;
136 DRM_INFO("radeon: irq initialized.\n");
140 void radeon_irq_kms_fini(struct radeon_device *rdev)
142 drm_vblank_cleanup(rdev->ddev);
143 if (rdev->irq.installed) {
144 drm_irq_uninstall(rdev->ddev);
145 rdev->irq.installed = false;
146 if (rdev->msi_enabled)
147 pci_disable_msi(rdev->pdev);
151 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
153 unsigned long irqflags;
155 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
156 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
157 rdev->irq.sw_int = true;
158 radeon_irq_set(rdev);
160 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
163 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
165 unsigned long irqflags;
167 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
168 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
169 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
170 rdev->irq.sw_int = false;
171 radeon_irq_set(rdev);
173 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);