From dde4c1bf5df0f852e497e5644d3578885b969fdb Mon Sep 17 00:00:00 2001 From: Gregory Herrero Date: Thu, 5 Nov 2015 09:41:38 +0100 Subject: [PATCH] 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. Acked-by: John Youn Signed-off-by: Gregory Herrero Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/hcd_ddma.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) 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, -- 2.20.1