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 /* we can race here at startup, some boards seem to trigger
55 * hotplug irqs when they shouldn't. */
56 if (!rdev->mode_info.mode_config_initialized)
59 mutex_lock(&mode_config->mutex);
60 if (mode_config->num_connector) {
61 list_for_each_entry(connector, &mode_config->connector_list, head)
62 radeon_connector_hotplug(connector);
64 mutex_unlock(&mode_config->mutex);
65 /* Just fire off a uevent and let userspace tell us what to do */
66 drm_helper_hpd_irq_event(dev);
69 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
71 struct radeon_device *rdev = dev->dev_private;
74 /* Disable *all* interrupts */
75 rdev->irq.sw_int = false;
76 rdev->irq.gui_idle = false;
77 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
78 rdev->irq.hpd[i] = false;
79 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
80 rdev->irq.crtc_vblank_int[i] = false;
81 rdev->irq.pflip[i] = false;
85 radeon_irq_process(rdev);
88 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
90 struct radeon_device *rdev = dev->dev_private;
92 dev->max_vblank_count = 0x001fffff;
93 rdev->irq.sw_int = true;
98 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
100 struct radeon_device *rdev = dev->dev_private;
106 /* Disable *all* interrupts */
107 rdev->irq.sw_int = false;
108 rdev->irq.gui_idle = false;
109 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
110 rdev->irq.hpd[i] = false;
111 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
112 rdev->irq.crtc_vblank_int[i] = false;
113 rdev->irq.pflip[i] = false;
115 radeon_irq_set(rdev);
118 static bool radeon_msi_ok(struct radeon_device *rdev)
120 /* RV370/RV380 was first asic with MSI support */
121 if (rdev->family < CHIP_RV380)
124 /* MSIs don't work on AGP */
125 if (rdev->flags & RADEON_IS_AGP)
131 else if (radeon_msi == 0)
135 /* HP RS690 only seems to work with MSIs. */
136 if ((rdev->pdev->device == 0x791f) &&
137 (rdev->pdev->subsystem_vendor == 0x103c) &&
138 (rdev->pdev->subsystem_device == 0x30c2))
141 /* Dell RS690 only seems to work with MSIs. */
142 if ((rdev->pdev->device == 0x791f) &&
143 (rdev->pdev->subsystem_vendor == 0x1028) &&
144 (rdev->pdev->subsystem_device == 0x01fc))
147 /* Dell RS690 only seems to work with MSIs. */
148 if ((rdev->pdev->device == 0x791f) &&
149 (rdev->pdev->subsystem_vendor == 0x1028) &&
150 (rdev->pdev->subsystem_device == 0x01fd))
153 /* Gateway RS690 only seems to work with MSIs. */
154 if ((rdev->pdev->device == 0x791f) &&
155 (rdev->pdev->subsystem_vendor == 0x107b) &&
156 (rdev->pdev->subsystem_device == 0x0185))
159 /* try and enable MSIs by default on all RS690s */
160 if (rdev->family == CHIP_RS690)
163 /* RV515 seems to have MSI issues where it loses
164 * MSI rearms occasionally. This leads to lockups and freezes.
165 * disable it by default.
167 if (rdev->family == CHIP_RV515)
169 if (rdev->flags & RADEON_IS_IGP) {
170 /* APUs work fine with MSIs */
171 if (rdev->family >= CHIP_PALM)
173 /* lots of IGPs have problems with MSIs */
180 int radeon_irq_kms_init(struct radeon_device *rdev)
185 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
187 spin_lock_init(&rdev->irq.sw_lock);
188 for (i = 0; i < rdev->num_crtc; i++)
189 spin_lock_init(&rdev->irq.pflip_lock[i]);
190 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
195 rdev->msi_enabled = 0;
197 if (radeon_msi_ok(rdev)) {
198 int ret = pci_enable_msi(rdev->pdev);
200 rdev->msi_enabled = 1;
201 dev_info(rdev->dev, "radeon: using MSI.\n");
204 rdev->irq.installed = true;
205 r = drm_irq_install(rdev->ddev);
207 rdev->irq.installed = false;
210 DRM_INFO("radeon: irq initialized.\n");
214 void radeon_irq_kms_fini(struct radeon_device *rdev)
216 drm_vblank_cleanup(rdev->ddev);
217 if (rdev->irq.installed) {
218 drm_irq_uninstall(rdev->ddev);
219 rdev->irq.installed = false;
220 if (rdev->msi_enabled)
221 pci_disable_msi(rdev->pdev);
223 flush_work_sync(&rdev->hotplug_work);
226 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
228 unsigned long irqflags;
230 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
231 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
232 rdev->irq.sw_int = true;
233 radeon_irq_set(rdev);
235 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
238 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
240 unsigned long irqflags;
242 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
243 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
244 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
245 rdev->irq.sw_int = false;
246 radeon_irq_set(rdev);
248 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
251 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
253 unsigned long irqflags;
255 if (crtc < 0 || crtc >= rdev->num_crtc)
258 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
259 if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
260 rdev->irq.pflip[crtc] = true;
261 radeon_irq_set(rdev);
263 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
266 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
268 unsigned long irqflags;
270 if (crtc < 0 || crtc >= rdev->num_crtc)
273 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
274 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
275 if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
276 rdev->irq.pflip[crtc] = false;
277 radeon_irq_set(rdev);
279 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);