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drm/nouveau: Runtime suspend despite HDA being unbound 

Commit 5addcf0a5f ("nouveau: add runtime PM support (v0.9)") prevents
runtime suspend of the GPU if its integrated HDA controller is not bound
to a driver.  The rationale appears to be that probing the HDA fails if
the GPU is in D3cold.

However we now use a device link to ensure that the GPU is runtime
resumed while the HDA controller is probed, rendering this safety
measure obsolete.  Remove it.

Cc: Dave Airlie <airlied@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Denis Lisov <dennis.lissov@gmail.com>       # Nvidia Optimus
Tested-by: Peter Wu <peter@lekensteyn.nl>              # Nvidia Optimus
Tested-by: Lukas Wunner <lukas@wunner.de>              # MacBook Pro
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://patchwork.freedesktop.org/patch/msgid/77e0ab74f3377ea9b6acf8fab624acfb4f7dbeca.1520068884.git.lukas@wunner.de
This commit is contained in:
Lukas Wunner 2018-03-03 10:53:24 +01:00
parent b67ae78efa
commit fd1eabd880
2 changed files with 0 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/gpu/drm/nouveau/nouveau_drm.c
View File

@ -510,37 +510,6 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
return 0;
}
#define PCI_CLASS_MULTIMEDIA_HD_AUDIO 0x0403
static void
nouveau_get_hdmi_dev(struct nouveau_drm *drm)
{
struct pci_dev *pdev = drm->dev->pdev;
if (!pdev) {
NV_DEBUG(drm, "not a PCI device; no HDMI\n");
drm->hdmi_device = NULL;
return;
}
/* subfunction one is a hdmi audio device? */
drm->hdmi_device = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
(unsigned int)pdev->bus->number,
PCI_DEVFN(PCI_SLOT(pdev->devfn), 1));
if (!drm->hdmi_device) {
NV_DEBUG(drm, "hdmi device not found %d %d %d\n", pdev->bus->number, PCI_SLOT(pdev->devfn), 1);
return;
}
if ((drm->hdmi_device->class >> 8) != PCI_CLASS_MULTIMEDIA_HD_AUDIO) {
NV_DEBUG(drm, "possible hdmi device not audio %d\n", drm->hdmi_device->class);
pci_dev_put(drm->hdmi_device);
drm->hdmi_device = NULL;
return;
}
}
static int
nouveau_drm_load(struct drm_device *dev, unsigned long flags)
{
@ -568,8 +537,6 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags)
INIT_LIST_HEAD(&drm->clients);
spin_lock_init(&drm->tile.lock);
nouveau_get_hdmi_dev(drm);
/* workaround an odd issue on nvc1 by disabling the device's
* nosnoop capability. hopefully won't cause issues until a
* better fix is found - assuming there is one...
@ -655,8 +622,6 @@ nouveau_drm_unload(struct drm_device *dev)
nouveau_ttm_fini(drm);
nouveau_vga_fini(drm);
if (drm->hdmi_device)
pci_dev_put(drm->hdmi_device);
nouveau_cli_fini(&drm->client);
nouveau_cli_fini(&drm->master);
kfree(drm);
@ -911,15 +876,6 @@ nouveau_pmops_runtime_idle(struct device *dev)
return -EBUSY;
}
/* if we have a hdmi audio device - make sure it has a driver loaded */
if (drm->hdmi_device) {
if (!drm->hdmi_device->driver) {
DRM_DEBUG_DRIVER("failing to power off - no HDMI audio driver loaded\n");
pm_runtime_mark_last_busy(dev);
return -EBUSY;
}
}
list_for_each_entry(crtc, &drm->dev->mode_config.crtc_list, head) {
if (crtc->enabled) {
DRM_DEBUG_DRIVER("failing to power off - crtc active\n");

1
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -208,7 +208,6 @@ struct nouveau_drm {
bool have_disp_power_ref;
struct dev_pm_domain vga_pm_domain;
struct pci_dev *hdmi_device;
};
static inline struct nouveau_drm *