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/drm_crtc_helper.h>
30 #include <drm/radeon_drm.h>
31 #include "radeon_reg.h"
35 #include <linux/pm_runtime.h>
37 #define RADEON_WAIT_IDLE_TIMEOUT 200
40 * radeon_driver_irq_handler_kms - irq handler for KMS
42 * @int irq, void *arg: args
44 * This is the irq handler for the radeon KMS driver (all asics).
45 * radeon_irq_process is a macro that points to the per-asic
46 * irq handler callback.
48 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
50 struct drm_device *dev = (struct drm_device *) arg;
51 struct radeon_device *rdev = dev->dev_private;
54 ret = radeon_irq_process(rdev);
55 if (ret == IRQ_HANDLED)
56 pm_runtime_mark_last_busy(dev->dev);
61 * Handle hotplug events outside the interrupt handler proper.
64 * radeon_hotplug_work_func - display hotplug work handler
68 * This is the hot plug event work handler (all asics).
69 * The work gets scheduled from the irq handler if there
70 * was a hot plug interrupt. It walks the connector table
71 * and calls the hotplug handler for each one, then sends
72 * a drm hotplug event to alert userspace.
74 static void radeon_hotplug_work_func(struct work_struct *work)
76 struct radeon_device *rdev = container_of(work, struct radeon_device,
78 struct drm_device *dev = rdev->ddev;
79 struct drm_mode_config *mode_config = &dev->mode_config;
80 struct drm_connector *connector;
82 mutex_lock(&mode_config->mutex);
83 if (mode_config->num_connector) {
84 list_for_each_entry(connector, &mode_config->connector_list, head)
85 radeon_connector_hotplug(connector);
87 mutex_unlock(&mode_config->mutex);
88 /* Just fire off a uevent and let userspace tell us what to do */
89 drm_helper_hpd_irq_event(dev);
92 static void radeon_dp_work_func(struct work_struct *work)
94 struct radeon_device *rdev = container_of(work, struct radeon_device,
96 struct drm_device *dev = rdev->ddev;
97 struct drm_mode_config *mode_config = &dev->mode_config;
98 struct drm_connector *connector;
100 /* this should take a mutex */
101 if (mode_config->num_connector) {
102 list_for_each_entry(connector, &mode_config->connector_list, head)
103 radeon_connector_hotplug(connector);
107 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
109 * @dev: drm dev pointer
111 * Gets the hw ready to enable irqs (all asics).
112 * This function disables all interrupt sources on the GPU.
114 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
116 struct radeon_device *rdev = dev->dev_private;
117 unsigned long irqflags;
120 spin_lock_irqsave(&rdev->irq.lock, irqflags);
121 /* Disable *all* interrupts */
122 for (i = 0; i < RADEON_NUM_RINGS; i++)
123 atomic_set(&rdev->irq.ring_int[i], 0);
124 rdev->irq.dpm_thermal = false;
125 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
126 rdev->irq.hpd[i] = false;
127 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
128 rdev->irq.crtc_vblank_int[i] = false;
129 atomic_set(&rdev->irq.pflip[i], 0);
130 rdev->irq.afmt[i] = false;
132 radeon_irq_set(rdev);
133 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
135 radeon_irq_process(rdev);
139 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
141 * @dev: drm dev pointer
143 * Handles stuff to be done after enabling irqs (all asics).
144 * Returns 0 on success.
146 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
148 struct radeon_device *rdev = dev->dev_private;
150 if (ASIC_IS_AVIVO(rdev))
151 dev->max_vblank_count = 0x00ffffff;
153 dev->max_vblank_count = 0x001fffff;
159 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
161 * @dev: drm dev pointer
163 * This function disables all interrupt sources on the GPU (all asics).
165 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
167 struct radeon_device *rdev = dev->dev_private;
168 unsigned long irqflags;
174 spin_lock_irqsave(&rdev->irq.lock, irqflags);
175 /* Disable *all* interrupts */
176 for (i = 0; i < RADEON_NUM_RINGS; i++)
177 atomic_set(&rdev->irq.ring_int[i], 0);
178 rdev->irq.dpm_thermal = false;
179 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
180 rdev->irq.hpd[i] = false;
181 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
182 rdev->irq.crtc_vblank_int[i] = false;
183 atomic_set(&rdev->irq.pflip[i], 0);
184 rdev->irq.afmt[i] = false;
186 radeon_irq_set(rdev);
187 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
191 * radeon_msi_ok - asic specific msi checks
193 * @rdev: radeon device pointer
195 * Handles asic specific MSI checks to determine if
196 * MSIs should be enabled on a particular chip (all asics).
197 * Returns true if MSIs should be enabled, false if MSIs
198 * should not be enabled.
200 static bool radeon_msi_ok(struct radeon_device *rdev)
202 /* RV370/RV380 was first asic with MSI support */
203 if (rdev->family < CHIP_RV380)
206 /* MSIs don't work on AGP */
207 if (rdev->flags & RADEON_IS_AGP)
211 * Older chips have a HW limitation, they can only generate 40 bits
212 * of address for "64-bit" MSIs which breaks on some platforms, notably
213 * IBM POWER servers, so we limit them
215 if (rdev->family < CHIP_BONAIRE) {
216 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
217 rdev->pdev->no_64bit_msi = 1;
223 else if (radeon_msi == 0)
227 /* HP RS690 only seems to work with MSIs. */
228 if ((rdev->pdev->device == 0x791f) &&
229 (rdev->pdev->subsystem_vendor == 0x103c) &&
230 (rdev->pdev->subsystem_device == 0x30c2))
233 /* Dell RS690 only seems to work with MSIs. */
234 if ((rdev->pdev->device == 0x791f) &&
235 (rdev->pdev->subsystem_vendor == 0x1028) &&
236 (rdev->pdev->subsystem_device == 0x01fc))
239 /* Dell RS690 only seems to work with MSIs. */
240 if ((rdev->pdev->device == 0x791f) &&
241 (rdev->pdev->subsystem_vendor == 0x1028) &&
242 (rdev->pdev->subsystem_device == 0x01fd))
245 /* Gateway RS690 only seems to work with MSIs. */
246 if ((rdev->pdev->device == 0x791f) &&
247 (rdev->pdev->subsystem_vendor == 0x107b) &&
248 (rdev->pdev->subsystem_device == 0x0185))
251 /* try and enable MSIs by default on all RS690s */
252 if (rdev->family == CHIP_RS690)
255 /* RV515 seems to have MSI issues where it loses
256 * MSI rearms occasionally. This leads to lockups and freezes.
257 * disable it by default.
259 if (rdev->family == CHIP_RV515)
261 if (rdev->flags & RADEON_IS_IGP) {
262 /* APUs work fine with MSIs */
263 if (rdev->family >= CHIP_PALM)
265 /* lots of IGPs have problems with MSIs */
273 * radeon_irq_kms_init - init driver interrupt info
275 * @rdev: radeon device pointer
277 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
278 * Returns 0 for success, error for failure.
280 int radeon_irq_kms_init(struct radeon_device *rdev)
284 spin_lock_init(&rdev->irq.lock);
285 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
290 rdev->msi_enabled = 0;
292 if (radeon_msi_ok(rdev)) {
293 int ret = pci_enable_msi(rdev->pdev);
295 rdev->msi_enabled = 1;
296 dev_info(rdev->dev, "radeon: using MSI.\n");
300 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
301 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
302 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
304 rdev->irq.installed = true;
305 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
307 rdev->irq.installed = false;
308 flush_work(&rdev->hotplug_work);
312 DRM_INFO("radeon: irq initialized.\n");
317 * radeon_irq_kms_fini - tear down driver interrupt info
319 * @rdev: radeon device pointer
321 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
323 void radeon_irq_kms_fini(struct radeon_device *rdev)
325 drm_vblank_cleanup(rdev->ddev);
326 if (rdev->irq.installed) {
327 drm_irq_uninstall(rdev->ddev);
328 rdev->irq.installed = false;
329 if (rdev->msi_enabled)
330 pci_disable_msi(rdev->pdev);
331 flush_work(&rdev->hotplug_work);
336 * radeon_irq_kms_sw_irq_get - enable software interrupt
338 * @rdev: radeon device pointer
339 * @ring: ring whose interrupt you want to enable
341 * Enables the software interrupt for a specific ring (all asics).
342 * The software interrupt is generally used to signal a fence on
345 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
347 unsigned long irqflags;
349 if (!rdev->ddev->irq_enabled)
352 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
353 spin_lock_irqsave(&rdev->irq.lock, irqflags);
354 radeon_irq_set(rdev);
355 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
360 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
362 * @rdev: radeon device pointer
363 * @ring: ring whose interrupt you want to enable
365 * Enables the software interrupt for a specific ring (all asics).
366 * The software interrupt is generally used to signal a fence on
369 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
371 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
375 * radeon_irq_kms_sw_irq_put - disable software interrupt
377 * @rdev: radeon device pointer
378 * @ring: ring whose interrupt you want to disable
380 * Disables the software interrupt for a specific ring (all asics).
381 * The software interrupt is generally used to signal a fence on
384 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
386 unsigned long irqflags;
388 if (!rdev->ddev->irq_enabled)
391 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
392 spin_lock_irqsave(&rdev->irq.lock, irqflags);
393 radeon_irq_set(rdev);
394 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
399 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
401 * @rdev: radeon device pointer
402 * @crtc: crtc whose interrupt you want to enable
404 * Enables the pageflip interrupt for a specific crtc (all asics).
405 * For pageflips we use the vblank interrupt source.
407 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
409 unsigned long irqflags;
411 if (crtc < 0 || crtc >= rdev->num_crtc)
414 if (!rdev->ddev->irq_enabled)
417 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
418 spin_lock_irqsave(&rdev->irq.lock, irqflags);
419 radeon_irq_set(rdev);
420 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
425 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
427 * @rdev: radeon device pointer
428 * @crtc: crtc whose interrupt you want to disable
430 * Disables the pageflip interrupt for a specific crtc (all asics).
431 * For pageflips we use the vblank interrupt source.
433 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
435 unsigned long irqflags;
437 if (crtc < 0 || crtc >= rdev->num_crtc)
440 if (!rdev->ddev->irq_enabled)
443 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
444 spin_lock_irqsave(&rdev->irq.lock, irqflags);
445 radeon_irq_set(rdev);
446 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
451 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
453 * @rdev: radeon device pointer
454 * @block: afmt block whose interrupt you want to enable
456 * Enables the afmt change interrupt for a specific afmt block (all asics).
458 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
460 unsigned long irqflags;
462 if (!rdev->ddev->irq_enabled)
465 spin_lock_irqsave(&rdev->irq.lock, irqflags);
466 rdev->irq.afmt[block] = true;
467 radeon_irq_set(rdev);
468 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
473 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
475 * @rdev: radeon device pointer
476 * @block: afmt block whose interrupt you want to disable
478 * Disables the afmt change interrupt for a specific afmt block (all asics).
480 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
482 unsigned long irqflags;
484 if (!rdev->ddev->irq_enabled)
487 spin_lock_irqsave(&rdev->irq.lock, irqflags);
488 rdev->irq.afmt[block] = false;
489 radeon_irq_set(rdev);
490 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
494 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
496 * @rdev: radeon device pointer
497 * @hpd_mask: mask of hpd pins you want to enable.
499 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
501 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
503 unsigned long irqflags;
506 if (!rdev->ddev->irq_enabled)
509 spin_lock_irqsave(&rdev->irq.lock, irqflags);
510 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
511 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
512 radeon_irq_set(rdev);
513 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
517 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
519 * @rdev: radeon device pointer
520 * @hpd_mask: mask of hpd pins you want to disable.
522 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
524 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
526 unsigned long irqflags;
529 if (!rdev->ddev->irq_enabled)
532 spin_lock_irqsave(&rdev->irq.lock, irqflags);
533 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
534 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
535 radeon_irq_set(rdev);
536 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);