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/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Jerome Glisse.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Dave Airlie
* Alex Deucher
* Jerome Glisse
*/
#include "drmP.h"
#include "drm_crtc_helper.h"
#include "radeon_drm.h"
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"
irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
struct radeon_device *rdev = dev->dev_private;
return radeon_irq_process(rdev);
}
/*
* Handle hotplug events outside the interrupt handler proper.
*/
static void radeon_hotplug_work_func(struct work_struct *work)
{
struct radeon_device *rdev = container_of(work, struct radeon_device,
hotplug_work);
struct drm_device *dev = rdev->ddev;
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
if (mode_config->num_connector) {
list_for_each_entry(connector, &mode_config->connector_list, head)
radeon_connector_hotplug(connector);
}
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
unsigned i;
/* Disable *all* interrupts */
rdev->irq.sw_int = false;
rdev->irq.gui_idle = false;
for (i = 0; i < rdev->num_crtc; i++)
rdev->irq.crtc_vblank_int[i] = false;
for (i = 0; i < 6; i++) {
rdev->irq.hpd[i] = false;
rdev->irq.pflip[i] = false;
}
radeon_irq_set(rdev);
/* Clear bits */
radeon_irq_process(rdev);
}
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
dev->max_vblank_count = 0x001fffff;
rdev->irq.sw_int = true;
radeon_irq_set(rdev);
return 0;
}
void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
{
struct radeon_device *rdev = dev->dev_private;
unsigned i;
if (rdev == NULL) {
return;
}
/* Disable *all* interrupts */
rdev->irq.sw_int = false;
rdev->irq.gui_idle = false;
for (i = 0; i < rdev->num_crtc; i++)
rdev->irq.crtc_vblank_int[i] = false;
for (i = 0; i < 6; i++) {
rdev->irq.hpd[i] = false;
rdev->irq.pflip[i] = false;
}
radeon_irq_set(rdev);
}
int radeon_irq_kms_init(struct radeon_device *rdev)
{
int r = 0;
INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
spin_lock_init(&rdev->irq.sw_lock);
r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
if (r) {
return r;
}
/* enable msi */
rdev->msi_enabled = 0;
/* MSIs don't seem to work reliably on all IGP
* chips. Disable MSI on them for now.
*/
if ((rdev->family >= CHIP_RV380) &&
((!(rdev->flags & RADEON_IS_IGP)) || (rdev->family >= CHIP_PALM)) &&
(!(rdev->flags & RADEON_IS_AGP))) {
int ret = pci_enable_msi(rdev->pdev);
if (!ret) {
rdev->msi_enabled = 1;
dev_info(rdev->dev, "radeon: using MSI.\n");
}
}
rdev->irq.installed = true;
r = drm_irq_install(rdev->ddev);
if (r) {
rdev->irq.installed = false;
return r;
}
DRM_INFO("radeon: irq initialized.\n");
return 0;
}
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
drm_vblank_cleanup(rdev->ddev);
if (rdev->irq.installed) {
drm_irq_uninstall(rdev->ddev);
rdev->irq.installed = false;
if (rdev->msi_enabled)
pci_disable_msi(rdev->pdev);
}
flush_work_sync(&rdev->hotplug_work);
}
void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
{
unsigned long irqflags;
spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
rdev->irq.sw_int = true;
radeon_irq_set(rdev);
}
spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
}
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
{
unsigned long irqflags;
spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
rdev->irq.sw_int = false;
radeon_irq_set(rdev);
}
spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
}
void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
{
unsigned long irqflags;
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
rdev->irq.pflip[crtc] = true;
radeon_irq_set(rdev);
}
spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
}
void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
{
unsigned long irqflags;
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
rdev->irq.pflip[crtc] = false;
radeon_irq_set(rdev);
}
spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
}
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