media: cx23885: add more quirks for reset DMA on some AMD IOMMU
authorDaniel Lee Kruse <daniel.lee.kruse@protonmail.com>
Wed, 30 Sep 2020 03:36:35 +0000 (05:36 +0200)
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Thu, 3 Dec 2020 06:29:12 +0000 (07:29 +0100)
commitdbf0b3a7b719eb3f72cb53c2ce7d34a012a9c261
treee143d12a1b399356a04eb1fec5fab0eb00b3c481
parenta109073bb9ec69ed9ec6eb541485e1dae63c13b4
media: cx23885: add more quirks for reset DMA on some AMD IOMMU

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