svn commit: r213302 - head/sys/dev/acpica
Alexander Motin
mav at FreeBSD.org
Thu Sep 30 16:23:01 UTC 2010
Author: mav
Date: Thu Sep 30 16:23:01 2010
New Revision: 213302
URL: http://svn.freebsd.org/changeset/base/213302
Log:
Do not use regular interrupts on NVidia HPETs. NVidia MCP5x chipsets have
number of unexplained interrupt problems. For some reason, using HPET
interrupts there breaks HDA sound. Legacy route mode interrupts reported
to work fine there.
Modified:
head/sys/dev/acpica/acpi_hpet.c
Modified: head/sys/dev/acpica/acpi_hpet.c
==============================================================================
--- head/sys/dev/acpica/acpi_hpet.c Thu Sep 30 16:09:52 2010 (r213301)
+++ head/sys/dev/acpica/acpi_hpet.c Thu Sep 30 16:23:01 2010 (r213302)
@@ -58,6 +58,7 @@ __FBSDID("$FreeBSD$");
#define HPET_VENDID_AMD 0x4353
#define HPET_VENDID_INTEL 0x8086
+#define HPET_VENDID_NVIDIA 0x10de
ACPI_SERIAL_DECL(hpet, "ACPI HPET support");
@@ -492,6 +493,12 @@ hpet_attach(device_t dev)
if (vendor == HPET_VENDID_AMD)
sc->allowed_irqs = 0x00000000;
/*
+ * NVidia MCP5x chipsets have number of unexplained interrupt
+ * problems. For some reason, using HPET interrupts breaks HDA sound.
+ */
+ if (vendor == HPET_VENDID_NVIDIA && rev <= 0x01)
+ sc->allowed_irqs = 0x00000000;
+ /*
* Neither QEMU nor VirtualBox report supported IRQs correctly.
* The only way to use HPET there is to specify IRQs manually
* and/or use legacy_route. Legacy_route mode work on both.
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