On Mon, Apr 27, 2020 at 09:03:22AM +0200, Martin Burnicki wrote: > Martin Burnicki wrote: > > Sean Young wrote: > >> On Fri, Apr 24, 2020 at 07:46:26PM +0200, Martin Burnicki wrote: > >>> I came across this thread and want to let you know that I also have > >>> problems with the cx23885 driver on a Ryzen system. > >>> > >>> The only solution I found on the 'net that could make it work was to add > >>> a line > >>> > >>> options cx23885 debug=7 > >>> > >>> to the file /etc/modprobe.d/cx23885.conf > >> > >> Have you tried: > >> > >> options cx23885 dma_reset_workaround=2 > > > > I think I remember I originally tried this when I set up this system, > > and it didn't work, but that may not have been with a value of 2. > > I've tried this now once more on my Ubuntu system with 5.3.0-46-generic, > and indeed the workaround fixes the problem. > > In case you are interested, here is the full dmesg output of the system > when the error occurs if *no* workaround is enabled: > > https://burnicki.net/martin/tmp/dmesg-with-error.txt > > See the "mpeg risc op code error" message close to the bottom of the file. Would you mind testing this patch please? Thanks Sean >From 216bd7f1a68de7a60bfa15a31f28343574bae313 Mon Sep 17 00:00:00 2001 From: Sean Young <sean@xxxxxxxx> Date: Thu, 23 Apr 2020 17:28:09 +0100 Subject: [PATCH] media: cx23885: add a missing vid for other problematic AMD IOMMOs The issue described in commit 95f408bbc4e4 ("media: cx23885: Ryzen DMA related RiSC engine stall fixes") also affects this device. Fixes: 95f408bbc4e4 ("media: cx23885: Ryzen DMA related RiSC engine stall fixes") Cc: Brad Love <brad@xxxxxxxxxxxxxxxx> Signed-off-by: Sean Young <sean@xxxxxxxx> --- drivers/media/pci/cx23885/cx23885-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c index 7e0b0b7cc2a3..f18c5017be84 100644 --- a/drivers/media/pci/cx23885/cx23885-core.c +++ b/drivers/media/pci/cx23885/cx23885-core.c @@ -2074,6 +2074,8 @@ static struct { * 0x1451 is PCI ID for the IOMMU found on Ryzen */ { PCI_VENDOR_ID_AMD, 0x1451 }, + { PCI_VENDOR_ID_AMD, 0x1481 }, + { PCI_VENDOR_ID_AMD, 0x15d1 }, /* Raven2 IOMMU */ }; static bool cx23885_does_need_dma_reset(void) -- 2.25.4
