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Do not use regular interrupts on NVidia HPETs. NVidia MCP5x chipsets have

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number of unexplained interrupt problems. For some reason, using HPET
interrupts there breaks HDA sound. Legacy route mode interrupts reported
to work fine there.
This commit is contained in:
Alexander Motin 2010-09-30 16:23:01 +00:00
parent ba8834a379
commit 3a2c9a26b5
1 changed files with 7 additions and 0 deletions
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7
sys/dev/acpica/acpi_hpet.c
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@ -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");
@ -491,6 +492,12 @@ 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