From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/i915/i915_switcheroo.c | 72 ++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 drivers/gpu/drm/i915/i915_switcheroo.c (limited to 'drivers/gpu/drm/i915/i915_switcheroo.c') diff --git a/drivers/gpu/drm/i915/i915_switcheroo.c b/drivers/gpu/drm/i915/i915_switcheroo.c new file mode 100644 index 0000000000..f45bd6b6ce --- /dev/null +++ b/drivers/gpu/drm/i915/i915_switcheroo.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2019 Intel Corporation + */ + +#include + +#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); + pm_message_t pmm = { .event = PM_EVENT_SUSPEND }; + + if (!i915) { + dev_err(&pdev->dev, "DRM not initialized, aborting switch.\n"); + return; + } + if (!HAS_DISPLAY(i915)) { + 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); + + /* + * 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 && HAS_DISPLAY(i915) && 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); +} -- cgit v1.2.3