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 cf94511485f258a07d60186d43e3687fcf959a87..e3ab40a966eb4ce4f5b9a35eecdbf1ed49e48477 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;