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nouveau_vga.c revision 1.1.1.2 
      1 /*	$NetBSD: nouveau_vga.c,v 1.1.1.2 2014/08/06 12:36:23 riastradh Exp $	*/
      2 
      3 #include <sys/cdefs.h>
      4 __KERNEL_RCSID(0, "$NetBSD: nouveau_vga.c,v 1.1.1.2 2014/08/06 12:36:23 riastradh Exp $");
      5 
      6 #include <linux/vgaarb.h>
      7 #include <linux/vga_switcheroo.h>
      8 
      9 #include <drm/drmP.h>
     10 #include <drm/drm_crtc_helper.h>
     11 
     12 #include "nouveau_drm.h"
     13 #include "nouveau_acpi.h"
     14 #include "nouveau_fbcon.h"
     15 #include "nouveau_vga.h"
     16 
     17 static unsigned int
     18 nouveau_vga_set_decode(void *priv, bool state)
     19 {
     20 	struct nouveau_device *device = nouveau_dev(priv);
     21 
     22 	if (device->card_type == NV_40 && device->chipset >= 0x4c)
     23 		nv_wr32(device, 0x088060, state);
     24 	else if (device->chipset >= 0x40)
     25 		nv_wr32(device, 0x088054, state);
     26 	else
     27 		nv_wr32(device, 0x001854, state);
     28 
     29 	if (state)
     30 		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
     31 		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
     32 	else
     33 		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
     34 }
     35 
     36 static void
     37 nouveau_switcheroo_set_state(struct pci_dev *pdev,
     38 			     enum vga_switcheroo_state state)
     39 {
     40 	struct drm_device *dev = pci_get_drvdata(pdev);
     41 
     42 	if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
     43 		return;
     44 
     45 	if (state == VGA_SWITCHEROO_ON) {
     46 		printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
     47 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
     48 		nouveau_pmops_resume(&pdev->dev);
     49 		drm_kms_helper_poll_enable(dev);
     50 		dev->switch_power_state = DRM_SWITCH_POWER_ON;
     51 	} else {
     52 		printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
     53 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
     54 		drm_kms_helper_poll_disable(dev);
     55 		nouveau_switcheroo_optimus_dsm();
     56 		nouveau_pmops_suspend(&pdev->dev);
     57 		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
     58 	}
     59 }
     60 
     61 static void
     62 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
     63 {
     64 	struct drm_device *dev = pci_get_drvdata(pdev);
     65 	nouveau_fbcon_output_poll_changed(dev);
     66 }
     67 
     68 static bool
     69 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
     70 {
     71 	struct drm_device *dev = pci_get_drvdata(pdev);
     72 	bool can_switch;
     73 
     74 	spin_lock(&dev->count_lock);
     75 	can_switch = (dev->open_count == 0);
     76 	spin_unlock(&dev->count_lock);
     77 	return can_switch;
     78 }
     79 
     80 static const struct vga_switcheroo_client_ops
     81 nouveau_switcheroo_ops = {
     82 	.set_gpu_state = nouveau_switcheroo_set_state,
     83 	.reprobe = nouveau_switcheroo_reprobe,
     84 	.can_switch = nouveau_switcheroo_can_switch,
     85 };
     86 
     87 void
     88 nouveau_vga_init(struct nouveau_drm *drm)
     89 {
     90 	struct drm_device *dev = drm->dev;
     91 	bool runtime = false;
     92 
     93 	/* only relevant for PCI devices */
     94 	if (!dev->pdev)
     95 		return;
     96 
     97 	vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
     98 
     99 	if (nouveau_runtime_pm == 1)
    100 		runtime = true;
    101 	if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
    102 		runtime = true;
    103 	vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
    104 
    105 	if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
    106 		vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
    107 }
    108 
    109 void
    110 nouveau_vga_fini(struct nouveau_drm *drm)
    111 {
    112 	struct drm_device *dev = drm->dev;
    113 	vga_switcheroo_unregister_client(dev->pdev);
    114 	vga_client_register(dev->pdev, NULL, NULL, NULL);
    115 }
    116 
    117 
    118 void
    119 nouveau_vga_lastclose(struct drm_device *dev)
    120 {
    121 	vga_switcheroo_process_delayed_switch();
    122 }
    123