media: cx23885: add more quirks for reset DMA on some AMD IOMMU

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On AMD Family 15h (Models 30h-3fh), I/O Memory Management Unit
RiSC engine sometimes stalls, requiring a reset.

As result, MythTV and w-scan won't scan channels on the AMD Kaveri
APU with the Hauppauge QuadHD TV tuner card.

For the solution I added the Input/Output Memory Management Unit's PCI
Identity of 0x1423 to the broken_dev_id[] array, which is used by
a quirks logic meant to fix similar problems with other AMD
chipsets.

Signed-off-by: Daniel Lee Kruse <daniel.lee.kruse@protonmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Daniel Lee Kruse 2020-09-30 05:36:35 +02:00 • committed by Mauro Carvalho Chehab

parent a109073bb9

commit dbf0b3a7b7

1 changed files with 4 additions and 0 deletions

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drivers/media/pci/cx23885/cx23885-core.c

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