Hi,
On 11/06/2015 11:56 AM, Felipe Balbi wrote:
Hi,
Bin Liu <b-liu@xxxxxx> writes:
This reverts commit 2035772010db634ec8566b658fb1cd87ec47ac77.
Commit 20357720 claims throughput improvement for MSC/UVC, but I
don't see much improvement. Following are the MSC measurement using
dd on AM335x GP EVM.
with BCD_BH: read: 14.9MB/s, write: 20.9MB/s
without BCD_BH: read: 15.2MB/s, write: 21.2MB/s
However with this commit the following regressions have been observed.
1. ASIX usb-ethernet dongle is completely broken on UDP RX.
2. Unpluging a 3G modem, which uses option driver, behind a hub causes
console log flooding with the following message.
option_instat_callback: error -71
Signed-off-by: Bin Liu <b-liu@xxxxxx>
---
drivers/usb/musb/musb_host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 0e29184..1c7f858 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -2613,7 +2613,7 @@ static const struct hc_driver musb_hc_driver = {
.description = "musb-hcd",
.product_desc = "MUSB HDRC host driver",
.hcd_priv_size = sizeof(struct musb *),
- .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
+ .flags = HCD_USB2 | HCD_MEMORY,
reverting will revert isochronous devices, IIRC. Can you check that
cameras still work ? That commit actually mentions that with this commit
we got 640x480@30fps working. Can you make sure it works without HCD_BH
as well ?
I don't see Isoch improvement with HCD_BH either.
All UVC cameras that I have do not work at YUV 640x480@30fps with or
without HCD_BH, mainly due the 50% bandwidth utilization in Isoch
transfer, which I talked to you months ago. The best I can get is YUV
640x480@20fps, which does not change with or without HCD_BH.
Regards,
-Bin.
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