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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-08-28 13:26:03 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-09-05 15:59:34 +0200
commit4fe0badd5882c64dc2dcd8893f9b85db63339736 (patch)
treed84d7773171be1a0a4cfacd646e0b7e2754a8089 /drivers/firewire/ohci.c
parentfc383796a8cc5df0a0c8633a16dd2e9528a16a63 (diff)
downloadlinux-stericsson-4fe0badd5882c64dc2dcd8893f9b85db63339736.tar.gz
firewire: ohci: fix Ricoh R5C832, video reception
In dual-buffer DMA mode, no video frames are ever received from R5C832 by libdc1394. Fallback to packet-per-buffer DMA works reliably. http://thread.gmane.org/gmane.linux.kernel.firewire.devel/13393/focus=13476 Reported-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/ohci.c')
-rw-r--r--drivers/firewire/ohci.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 3486bc49c177..76b321bb73f9 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -2431,6 +2431,11 @@ static int __devinit pci_probe(struct pci_dev *dev,
dev->device == PCI_DEVICE_ID_AGERE_FW643)
ohci->use_dualbuffer = false;
+ /* dual-buffer mode is broken */
+ if (dev->vendor == PCI_VENDOR_ID_RICOH &&
+ dev->device == PCI_DEVICE_ID_RICOH_R5C832)
+ ohci->use_dualbuffer = false;
+
/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
#if !defined(CONFIG_X86_32)
/* dual-buffer mode is broken with descriptor addresses above 2G */