| From | gregkh@linuxfou ... | Subject | [PATCH 5.10 22/49] media: cx23885: add more quirks for reset DMA on some AMD IOMMU | Date | Wed, 10 Mar 2021 14:23:33 +0100 |
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From: Daniel Lee Kruse <daniel.lee.kruse@protonmail.com>
[ 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> --- drivers/media/pci/cx23885/cx23885-core.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c index 4b0c53f61fb7..4e8132d4b2df 100644 --- a/drivers/media/pci/cx23885/cx23885-core.c +++ b/drivers/media/pci/cx23885/cx23885-core.c @@ -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) -- 2.30.1
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