AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 23:00:53 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

usb: cdns3: gadget: add CHAIN and ISP bit for sg list use case

Browse Source 
For sg buffer list use case, we need to add ISP for each TRB, and
add CHAIN bit for each TRB except for the last TRB.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Peter Chen 2020-09-10 17:11:26 +08:00 committed by Felipe Balbi
parent 4e218882eb
commit 87e1dcd489
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/cdns3/gadget.c
View File

@ -1220,8 +1220,14 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
else
priv_req->trb->control = cpu_to_le32(control);
if (sg_supported)
if (sg_supported) {
trb->control |= TRB_ISP;
/* Don't set chain bit for last TRB */
if (sg_iter < num_trb - 1)
trb->control |= TRB_CHAIN;
s = sg_next(s);
}
control = 0;
++sg_iter;