LCOV - code coverage report
Current view: top level - drivers/gpu/drm/i915 - i915_switcheroo.c (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 7 0.0 %
Date: 2022-04-01 14:35:51 Functions: 0 2 0.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // SPDX-License-Identifier: MIT
       2                 :            : /*
       3                 :            :  * Copyright © 2019 Intel Corporation
       4                 :            :  */
       5                 :            : 
       6                 :            : #include <linux/vga_switcheroo.h>
       7                 :            : 
       8                 :            : #include "i915_drv.h"
       9                 :            : #include "i915_switcheroo.h"
      10                 :            : 
      11                 :            : static void i915_switcheroo_set_state(struct pci_dev *pdev,
      12                 :            :                                       enum vga_switcheroo_state state)
      13                 :            : {
      14                 :            :         struct drm_i915_private *i915 = pdev_to_i915(pdev);
      15                 :            :         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
      16                 :            : 
      17                 :            :         if (!i915) {
      18                 :            :                 dev_err(&pdev->dev, "DRM not initialized, aborting switch.\n");
      19                 :            :                 return;
      20                 :            :         }
      21                 :            : 
      22                 :            :         if (state == VGA_SWITCHEROO_ON) {
      23                 :            :                 pr_info("switched on\n");
      24                 :            :                 i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
      25                 :            :                 /* i915 resume handler doesn't set to D0 */
      26                 :            :                 pci_set_power_state(pdev, PCI_D0);
      27                 :            :                 i915_resume_switcheroo(i915);
      28                 :            :                 i915->drm.switch_power_state = DRM_SWITCH_POWER_ON;
      29                 :            :         } else {
      30                 :            :                 pr_info("switched off\n");
      31                 :            :                 i915->drm.switch_power_state = DRM_SWITCH_POWER_CHANGING;
      32                 :            :                 i915_suspend_switcheroo(i915, pmm);
      33                 :            :                 i915->drm.switch_power_state = DRM_SWITCH_POWER_OFF;
      34                 :            :         }
      35                 :            : }
      36                 :            : 
      37                 :            : static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
      38                 :            : {
      39                 :            :         struct drm_i915_private *i915 = pdev_to_i915(pdev);
      40                 :            : 
      41                 :            :         /*
      42                 :            :          * FIXME: open_count is protected by drm_global_mutex but that would lead to
      43                 :            :          * locking inversion with the driver load path. And the access here is
      44                 :            :          * completely racy anyway. So don't bother with locking for now.
      45                 :            :          */
      46                 :            :         return i915 && i915->drm.open_count == 0;
      47                 :            : }
      48                 :            : 
      49                 :            : static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
      50                 :            :         .set_gpu_state = i915_switcheroo_set_state,
      51                 :            :         .reprobe = NULL,
      52                 :            :         .can_switch = i915_switcheroo_can_switch,
      53                 :            : };
      54                 :            : 
      55                 :          0 : int i915_switcheroo_register(struct drm_i915_private *i915)
      56                 :            : {
      57                 :          0 :         struct pci_dev *pdev = i915->drm.pdev;
      58                 :            : 
      59                 :          0 :         return vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
      60                 :            : }
      61                 :            : 
      62                 :          0 : void i915_switcheroo_unregister(struct drm_i915_private *i915)
      63                 :            : {
      64                 :          0 :         struct pci_dev *pdev = i915->drm.pdev;
      65                 :            : 
      66                 :          0 :         vga_switcheroo_unregister_client(pdev);
      67                 :          0 : }

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