Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jani Nikula |
193 |
58.66% |
9 |
32.14% |
| Chris Wilson |
62 |
18.84% |
7 |
25.00% |
| Takashi Iwai |
23 |
6.99% |
1 |
3.57% |
| Dave Airlie |
19 |
5.78% |
3 |
10.71% |
| Thomas Zimmermann |
15 |
4.56% |
2 |
7.14% |
| Rui Zhang |
8 |
2.43% |
1 |
3.57% |
| Lukas Wunner |
3 |
0.91% |
1 |
3.57% |
| Imre Deak |
2 |
0.61% |
1 |
3.57% |
| Rafael J. Wysocki |
2 |
0.61% |
1 |
3.57% |
| Jesse Barnes |
1 |
0.30% |
1 |
3.57% |
| Daniel Vetter |
1 |
0.30% |
1 |
3.57% |
| Total |
329 |
|
28 |
|
// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include <linux/vga_switcheroo.h>
#include "display/intel_display_device.h"
#include "i915_driver.h"
#include "i915_drv.h"
#include "i915_switcheroo.h"
static void i915_switcheroo_set_state(struct pci_dev *pdev,
enum vga_switcheroo_state state)
{
struct drm_i915_private *i915 = pdev_to_i915(pdev);
struct intel_display *display = i915 ? i915->display : NULL;
pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
if (!i915) {
dev_err(&pdev->dev, "DRM not initialized, aborting switch.\n");
return;
}
if (!intel_display_device_present(display)) {
dev_err(&pdev->dev, "Device state not initialized, aborting switch.\n");
return;
}
if (state == VGA_SWITCHEROO_ON) {
drm_info(&i915->drm, "switched on\n");
i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
/* i915 resume handler doesn't set to D0 */
pci_set_power_state(pdev, PCI_D0);
i915_driver_resume_switcheroo(i915);
i915->drm.switch_power_state = DRM_SWITCH_POWER_ON;
} else {
drm_info(&i915->drm, "switched off\n");
i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
i915_driver_suspend_switcheroo(i915, pmm);
i915->drm.switch_power_state = DRM_SWITCH_POWER_OFF;
}
}
static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
{
struct drm_i915_private *i915 = pdev_to_i915(pdev);
struct intel_display *display = i915 ? i915->display : NULL;
/*
* FIXME: open_count is protected by drm_global_mutex but that would lead to
* locking inversion with the driver load path. And the access here is
* completely racy anyway. So don't bother with locking for now.
*/
return i915 && intel_display_device_present(display) &&
atomic_read(&i915->drm.open_count) == 0;
}
static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
.set_gpu_state = i915_switcheroo_set_state,
.reprobe = NULL,
.can_switch = i915_switcheroo_can_switch,
};
int i915_switcheroo_register(struct drm_i915_private *i915)
{
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
return vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
}
void i915_switcheroo_unregister(struct drm_i915_private *i915)
{
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
vga_switcheroo_unregister_client(pdev);
}