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

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[ Upstream commit dbf0b3a7b719eb3f72cb53c2ce7d34a012a9c261 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Lee Kruse 2020-09-30 05:36:35 +02:00 committed by Greg Kroah-Hartman
parent fd476c6d4e
commit 86c8848d68
1 changed files with 4 additions and 0 deletions
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4
drivers/media/pci/cx23885/cx23885-core.c
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@ -2074,6 +2074,10 @@ static struct {
* 0x1451 is PCI ID for the IOMMU found on Ryzen
*/
{ PCI_VENDOR_ID_AMD, 0x1451 },
/* According to sudo lspci -nn,
* 0x1423 is the PCI ID for the IOMMU found on Kaveri
*/
{ PCI_VENDOR_ID_AMD, 0x1423 },
};
static bool cx23885_does_need_dma_reset(void)