Commit 586bc4aab878 ("ALSA: hda/hdmi - fix vgaswitcheroo detection for
AMD") caused only AMD gpu's with PX to have their audio component register
with vga_switcheroo. This meant that Apple Macbooks with apple-gmux as the
gpu switcher no longer had the audio client registering, so when the gpu is
powered off by vga_switcheroo snd_hda_intel is unaware that it should have
suspended the device:
amdgpu: switched off
snd_hda_intel 0000:03:00.1:
Unable to change power state from D3hot to D0, device inaccessible
snd_hda_intel 0000:03:00.1: CORB reset timeout#2, CORBRP = 65535
Simialar to ATPX, we use the presence of an acpi method (PWRD in this
case) to ensure we only register with the correct devices.
Fixes: 586bc4aab878 ("ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD")
Signed-off-by: Orlando Chamberlain <orlandoch....@gmail.com>
---
sound/pci/hda/hda_intel.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 87002670c0c9..c97bbe60e603 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1435,11 +1435,25 @@ static bool atpx_present(void)
}
return false;
}
+
+static bool pwrd_present(struct pci_dev *pci)
+{
+ acpi_handle pwrd_handle;
+ acpi_status status;
+
+ status = acpi_get_handle(ACPI_HANDLE(&pci->dev), "PWRD", &pwrd_handle);
+ return ACPI_FAILURE(status) ? false : true;
+}
#else
static bool atpx_present(void)
{
return false;
}
+
+static bool pwrd_present(struct pci_dev *pci)
+{
+ return false;
+}
#endif
/*
@@ -1461,9 +1475,12 @@ static struct pci_dev *get_bound_vga(struct pci_dev *pci)
* rather than the dGPU's namespace. However,
* the dGPU is the one who is involved in
* vgaswitcheroo.
+ *
+ * PWRD is in the dGPU's ACPI namespace on Apple
+ * Macbooks with dual gpu's.
*/
if (((p->class >> 16) ==
PCI_BASE_CLASS_DISPLAY) &&
- atpx_present())
+ (atpx_present() ||
pwrd_present(p)))
return p;
pci_dev_put(p);
}
--
2.39.1
