From: Gregory Herrero Date: Thu, 5 Nov 2015 08:41:38 +0000 (+0100) Subject: UPSTREAM: usb: dwc2: host: set active bit in isochronous descriptors X-Git-Tag: firefly_0821_release~926 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1814965294b60bff08dcb5b432e1e718ec9d614d;p=firefly-linux-kernel-4.4.55.git UPSTREAM: usb: dwc2: host: set active bit in isochronous descriptors Active bit must be enabled in all scheduled descriptors. Else transfer never start. Remove previous code which was not correctly configuring descriptors. Active bit was set before calling dwc2_fill_host_isoc_dma_desc() which is erasing dma_desc->status. Change-Id: Ifee640205fc2af53c2f7859153209cb5de289988 Acked-by: John Youn Signed-off-by: Gregory Herrero Signed-off-by: Felipe Balbi Signed-off-by: Huang, Tao (cherry picked from commit dde4c1bf5df0f852e497e5644d3578885b969fdb) --- diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c index 4b0be93dac6f..98d862726b5a 100644 --- a/drivers/usb/dwc2/hcd_ddma.c +++ b/drivers/usb/dwc2/hcd_ddma.c @@ -524,6 +524,9 @@ static void dwc2_fill_host_isoc_dma_desc(struct dwc2_hsotg *hsotg, dma_desc->status = qh->n_bytes[idx] << HOST_DMA_ISOC_NBYTES_SHIFT & HOST_DMA_ISOC_NBYTES_MASK; + /* Set active bit */ + dma_desc->status |= HOST_DMA_A; + qh->ntd++; qtd->isoc_frame_index_last++; @@ -559,8 +562,6 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg, list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) { while (qh->ntd < ntd_max && qtd->isoc_frame_index_last < qtd->urb->packet_count) { - if (n_desc > 1) - qh->desc_list[n_desc - 1].status |= HOST_DMA_A; dwc2_fill_host_isoc_dma_desc(hsotg, qtd, qh, max_xfer_size, idx); idx = dwc2_desclist_idx_inc(idx, inc, qh->dev_speed); @@ -606,12 +607,6 @@ static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg, qh->desc_list[idx].status |= HOST_DMA_IOC; #endif - - if (n_desc) { - qh->desc_list[n_desc - 1].status |= HOST_DMA_A; - if (n_desc > 1) - qh->desc_list[0].status |= HOST_DMA_A; - } } static void dwc2_fill_host_dma_desc(struct dwc2_hsotg *hsotg,