usb: musb: musb_cppi41: Make CPPI aware of high bandwidth transfers
Enable CPPI to handle high bandwidth transfers, especially to support
webcam captures. Use a single bd to get the whole of the data in case of
high bandwidth transfers.
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index f889296..39ee516 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -448,12 +448,25 @@
dma_addr_t dma_addr, u32 len)
{
int ret;
+ struct cppi41_dma_channel *cppi41_channel = channel->private_data;
+ int hb_mult = 0;
BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
channel->status == MUSB_DMA_STATUS_BUSY);
+ if (is_host_active(cppi41_channel->controller->musb)) {
+ if (cppi41_channel->is_tx)
+ hb_mult = cppi41_channel->hw_ep->out_qh->hb_mult;
+ else
+ hb_mult = cppi41_channel->hw_ep->in_qh->hb_mult;
+ }
+
channel->status = MUSB_DMA_STATUS_BUSY;
channel->actual_len = 0;
+
+ if (hb_mult)
+ packet_sz = hb_mult * (packet_sz & 0x7FF);
+
ret = cppi41_configure_channel(channel, packet_sz, mode, dma_addr, len);
if (!ret)
channel->status = MUSB_DMA_STATUS_FREE;