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authorMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>2018-05-23 15:24:44 +0300
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-06-19 12:48:14 +0300
commit1d8e5c00275825fc42aaa5597dab1d0b5b26bb64 (patch)
treeb69606da10d7d91038ca216b907f6296b6619f1a /drivers/usb
parent9bb073a053f0464ea74a4d4c331fdb7da58568d6 (diff)
downloadlinux-1d8e5c00275825fc42aaa5597dab1d0b5b26bb64.tar.xz
dwc2: gadget: Fix ISOC IN DDMA PID bitfield value calculation
PID bitfield in descriptor should be set based on particular request length, not based on EP's mc value. PID value can't be set to 0 even request length is 0. Signed-off-by: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/dwc2/gadget.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 76e4f2e7d947..a0f82cca2d9a 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -812,6 +812,7 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep,
u32 index;
u32 maxsize = 0;
u32 mask = 0;
+ u8 pid = 0;
maxsize = dwc2_gadget_get_desc_params(hs_ep, &mask);
@@ -840,7 +841,11 @@ static int dwc2_gadget_fill_isoc_desc(struct dwc2_hsotg_ep *hs_ep,
((len << DEV_DMA_NBYTES_SHIFT) & mask));
if (hs_ep->dir_in) {
- desc->status |= ((hs_ep->mc << DEV_DMA_ISOC_PID_SHIFT) &
+ if (len)
+ pid = DIV_ROUND_UP(len, hs_ep->ep.maxpacket);
+ else
+ pid = 1;
+ desc->status |= ((pid << DEV_DMA_ISOC_PID_SHIFT) &
DEV_DMA_ISOC_PID_MASK) |
((len % hs_ep->ep.maxpacket) ?
DEV_DMA_SHORT : 0) |