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 /* we can race here at startup, some boards seem to trigger
83 * hotplug irqs when they shouldn't. */
84 if (!rdev->mode_info.mode_config_initialized)
87 mutex_lock(&mode_config->mutex);
88 list_for_each_entry(connector, &mode_config->connector_list, head)
89 radeon_connector_hotplug(connector);
90 mutex_unlock(&mode_config->mutex);
91 /* Just fire off a uevent and let userspace tell us what to do */
92 drm_helper_hpd_irq_event(dev);
95 static void radeon_dp_work_func(struct work_struct *work)
97 struct radeon_device *rdev = container_of(work, struct radeon_device,
99 struct drm_device *dev = rdev->ddev;
100 struct drm_mode_config *mode_config = &dev->mode_config;
101 struct drm_connector *connector;
103 /* this should take a mutex */
104 list_for_each_entry(connector, &mode_config->connector_list, head)
105 radeon_connector_hotplug(connector);
108 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
110 * @dev: drm dev pointer
112 * Gets the hw ready to enable irqs (all asics).
113 * This function disables all interrupt sources on the GPU.
115 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
117 struct radeon_device *rdev = dev->dev_private;
118 unsigned long irqflags;
121 spin_lock_irqsave(&rdev->irq.lock, irqflags);
122 /* Disable *all* interrupts */
123 for (i = 0; i < RADEON_NUM_RINGS; i++)
124 atomic_set(&rdev->irq.ring_int[i], 0);
125 rdev->irq.dpm_thermal = false;
126 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
127 rdev->irq.hpd[i] = false;
128 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
129 rdev->irq.crtc_vblank_int[i] = false;
130 atomic_set(&rdev->irq.pflip[i], 0);
131 rdev->irq.afmt[i] = false;
133 radeon_irq_set(rdev);
134 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
136 radeon_irq_process(rdev);
140 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
142 * @dev: drm dev pointer
144 * Handles stuff to be done after enabling irqs (all asics).
145 * Returns 0 on success.
147 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
149 struct radeon_device *rdev = dev->dev_private;
151 if (ASIC_IS_AVIVO(rdev))
152 dev->max_vblank_count = 0x00ffffff;
154 dev->max_vblank_count = 0x001fffff;
160 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
162 * @dev: drm dev pointer
164 * This function disables all interrupt sources on the GPU (all asics).
166 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
168 struct radeon_device *rdev = dev->dev_private;
169 unsigned long irqflags;
175 spin_lock_irqsave(&rdev->irq.lock, irqflags);
176 /* Disable *all* interrupts */
177 for (i = 0; i < RADEON_NUM_RINGS; i++)
178 atomic_set(&rdev->irq.ring_int[i], 0);
179 rdev->irq.dpm_thermal = false;
180 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
181 rdev->irq.hpd[i] = false;
182 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
183 rdev->irq.crtc_vblank_int[i] = false;
184 atomic_set(&rdev->irq.pflip[i], 0);
185 rdev->irq.afmt[i] = false;
187 radeon_irq_set(rdev);
188 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
192 * radeon_msi_ok - asic specific msi checks
194 * @rdev: radeon device pointer
196 * Handles asic specific MSI checks to determine if
197 * MSIs should be enabled on a particular chip (all asics).
198 * Returns true if MSIs should be enabled, false if MSIs
199 * should not be enabled.
201 static bool radeon_msi_ok(struct radeon_device *rdev)
203 /* RV370/RV380 was first asic with MSI support */
204 if (rdev->family < CHIP_RV380)
207 /* MSIs don't work on AGP */
208 if (rdev->flags & RADEON_IS_AGP)
212 * Older chips have a HW limitation, they can only generate 40 bits
213 * of address for "64-bit" MSIs which breaks on some platforms, notably
214 * IBM POWER servers, so we limit them
216 if (rdev->family < CHIP_BONAIRE) {
217 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
218 rdev->pdev->no_64bit_msi = 1;
224 else if (radeon_msi == 0)
228 /* HP RS690 only seems to work with MSIs. */
229 if ((rdev->pdev->device == 0x791f) &&
230 (rdev->pdev->subsystem_vendor == 0x103c) &&
231 (rdev->pdev->subsystem_device == 0x30c2))
234 /* Dell RS690 only seems to work with MSIs. */
235 if ((rdev->pdev->device == 0x791f) &&
236 (rdev->pdev->subsystem_vendor == 0x1028) &&
237 (rdev->pdev->subsystem_device == 0x01fc))
240 /* Dell RS690 only seems to work with MSIs. */
241 if ((rdev->pdev->device == 0x791f) &&
242 (rdev->pdev->subsystem_vendor == 0x1028) &&
243 (rdev->pdev->subsystem_device == 0x01fd))
246 /* Gateway RS690 only seems to work with MSIs. */
247 if ((rdev->pdev->device == 0x791f) &&
248 (rdev->pdev->subsystem_vendor == 0x107b) &&
249 (rdev->pdev->subsystem_device == 0x0185))
252 /* try and enable MSIs by default on all RS690s */
253 if (rdev->family == CHIP_RS690)
256 /* RV515 seems to have MSI issues where it loses
257 * MSI rearms occasionally. This leads to lockups and freezes.
258 * disable it by default.
260 if (rdev->family == CHIP_RV515)
262 if (rdev->flags & RADEON_IS_IGP) {
263 /* APUs work fine with MSIs */
264 if (rdev->family >= CHIP_PALM)
266 /* lots of IGPs have problems with MSIs */
274 * radeon_irq_kms_init - init driver interrupt info
276 * @rdev: radeon device pointer
278 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
279 * Returns 0 for success, error for failure.
281 int radeon_irq_kms_init(struct radeon_device *rdev)
285 spin_lock_init(&rdev->irq.lock);
286 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
292 rdev->msi_enabled = 0;
294 if (radeon_msi_ok(rdev)) {
295 int ret = pci_enable_msi(rdev->pdev);
297 rdev->msi_enabled = 1;
298 dev_info(rdev->dev, "radeon: using MSI.\n");
302 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
303 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
304 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
306 rdev->irq.installed = true;
307 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
309 rdev->irq.installed = false;
310 flush_delayed_work(&rdev->hotplug_work);
314 DRM_INFO("radeon: irq initialized.\n");
319 * radeon_irq_kms_fini - tear down driver interrupt info
321 * @rdev: radeon device pointer
323 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
325 void radeon_irq_kms_fini(struct radeon_device *rdev)
327 if (rdev->irq.installed) {
328 drm_irq_uninstall(rdev->ddev);
329 rdev->irq.installed = false;
330 if (rdev->msi_enabled)
331 pci_disable_msi(rdev->pdev);
332 flush_delayed_work(&rdev->hotplug_work);
337 * radeon_irq_kms_sw_irq_get - enable software interrupt
339 * @rdev: radeon device pointer
340 * @ring: ring whose interrupt you want to enable
342 * Enables the software interrupt for a specific ring (all asics).
343 * The software interrupt is generally used to signal a fence on
346 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
348 unsigned long irqflags;
350 if (!rdev->ddev->irq_enabled)
353 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
354 spin_lock_irqsave(&rdev->irq.lock, irqflags);
355 radeon_irq_set(rdev);
356 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
361 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
363 * @rdev: radeon device pointer
364 * @ring: ring whose interrupt you want to enable
366 * Enables the software interrupt for a specific ring (all asics).
367 * The software interrupt is generally used to signal a fence on
370 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
372 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
376 * radeon_irq_kms_sw_irq_put - disable software interrupt
378 * @rdev: radeon device pointer
379 * @ring: ring whose interrupt you want to disable
381 * Disables the software interrupt for a specific ring (all asics).
382 * The software interrupt is generally used to signal a fence on
385 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
387 unsigned long irqflags;
389 if (!rdev->ddev->irq_enabled)
392 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
393 spin_lock_irqsave(&rdev->irq.lock, irqflags);
394 radeon_irq_set(rdev);
395 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
400 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
402 * @rdev: radeon device pointer
403 * @crtc: crtc whose interrupt you want to enable
405 * Enables the pageflip interrupt for a specific crtc (all asics).
406 * For pageflips we use the vblank interrupt source.
408 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
410 unsigned long irqflags;
412 if (crtc < 0 || crtc >= rdev->num_crtc)
415 if (!rdev->ddev->irq_enabled)
418 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
419 spin_lock_irqsave(&rdev->irq.lock, irqflags);
420 radeon_irq_set(rdev);
421 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
426 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
428 * @rdev: radeon device pointer
429 * @crtc: crtc whose interrupt you want to disable
431 * Disables the pageflip interrupt for a specific crtc (all asics).
432 * For pageflips we use the vblank interrupt source.
434 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
436 unsigned long irqflags;
438 if (crtc < 0 || crtc >= rdev->num_crtc)
441 if (!rdev->ddev->irq_enabled)
444 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
445 spin_lock_irqsave(&rdev->irq.lock, irqflags);
446 radeon_irq_set(rdev);
447 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
452 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
454 * @rdev: radeon device pointer
455 * @block: afmt block whose interrupt you want to enable
457 * Enables the afmt change interrupt for a specific afmt block (all asics).
459 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
461 unsigned long irqflags;
463 if (!rdev->ddev->irq_enabled)
466 spin_lock_irqsave(&rdev->irq.lock, irqflags);
467 rdev->irq.afmt[block] = true;
468 radeon_irq_set(rdev);
469 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
474 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
476 * @rdev: radeon device pointer
477 * @block: afmt block whose interrupt you want to disable
479 * Disables the afmt change interrupt for a specific afmt block (all asics).
481 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
483 unsigned long irqflags;
485 if (!rdev->ddev->irq_enabled)
488 spin_lock_irqsave(&rdev->irq.lock, irqflags);
489 rdev->irq.afmt[block] = false;
490 radeon_irq_set(rdev);
491 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
495 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
497 * @rdev: radeon device pointer
498 * @hpd_mask: mask of hpd pins you want to enable.
500 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
502 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
504 unsigned long irqflags;
507 if (!rdev->ddev->irq_enabled)
510 spin_lock_irqsave(&rdev->irq.lock, irqflags);
511 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
512 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
513 radeon_irq_set(rdev);
514 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
518 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
520 * @rdev: radeon device pointer
521 * @hpd_mask: mask of hpd pins you want to disable.
523 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
525 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
527 unsigned long irqflags;
530 if (!rdev->ddev->irq_enabled)
533 spin_lock_irqsave(&rdev->irq.lock, irqflags);
534 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
535 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
536 radeon_irq_set(rdev);
537 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
541 * radeon_irq_kms_update_int_n - helper for updating interrupt enable registers
543 * @rdev: radeon device pointer
544 * @reg: the register to write to enable/disable interrupts
545 * @mask: the mask that enables the interrupts
546 * @enable: whether to enable or disable the interrupt register
547 * @name: the name of the interrupt register to print to the kernel log
548 * @num: the number of the interrupt register to print to the kernel log
550 * Helper for updating the enable state of interrupt registers. Checks whether
551 * or not the interrupt matches the enable state we want. If it doesn't, then
552 * we update it and print a debugging message to the kernel log indicating the
553 * new state of the interrupt register.
555 * Used for updating sequences of interrupts registers like HPD1, HPD2, etc.
557 void radeon_irq_kms_set_irq_n_enabled(struct radeon_device *rdev,
559 bool enable, const char *name, unsigned n)
561 u32 tmp = RREG32(reg);
563 /* Interrupt state didn't change */
564 if (!!(tmp & mask) == enable)
568 DRM_DEBUG("%s%d interrupts enabled\n", name, n);
569 WREG32(reg, tmp |= mask);
571 DRM_DEBUG("%s%d interrupts disabled\n", name, n);
572 WREG32(reg, tmp & ~mask);