USB: musb: fix ISOC Tx programming for CPPI DMAs

Isochronous Tx DMA is getting programmed but never getting started
for CPPI and TUSB DMAs and thus Isochronous Tx doesn't work.

Fixing it by starting DMAs using musb_h_tx_dma_start().

Signed-off-by: Swaminathan S <swami.iyer@ti.com>
Signed-off-by: Babu Ravi <ravibabu@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index cf94511..e3ab40a 100644 (file)
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1301,8 +1301,11 @@ void musb_host_tx(struct musb *musb, u8 epnum)
                return;
        } else  if (usb_pipeisoc(pipe) && dma) {
                if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
-                               offset, length))
+                               offset, length)) {
+                       if (is_cppi_enabled() || tusb_dma_omap())
+                               musb_h_tx_dma_start(hw_ep);
                        return;
+               }
        } else  if (tx_csr & MUSB_TXCSR_DMAENAB) {
                DBG(1, "not complete, but DMA enabled?\n");
                return;