Hello.
On 02/06/2012 05:26 PM, Felipe Balbi wrote:
Those transfer types are generally high bandwidth, so we
want to optimize transfers with those endpoints.
For that, databook suggests allocating 3 * wMaxPacketSize
of FIFO. Let's do that.
Signed-off-by: Felipe Balbi<balbi@xxxxxx>
---
This will be sent to v3.4 merge window, unless someone
has any concerns.
drivers/usb/dwc3/gadget.c | 20 ++++++++++++++++++--
1 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1f64e7c..0542b96 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
[...]
@@ -180,11 +181,26 @@ int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc)
if (!(dep->flags& DWC3_EP_ENABLED))
continue;
- tmp = dep->endpoint.maxpacket;
- tmp += mdwidth;
+ if (usb_endpoint_xfer_bulk(dep->desc)
+ || usb_endpoint_xfer_isoc(dep->desc))
+ mult = 3;
+
+ /*
+ * REVISIT: the following assumes we will always enough space
^ "have" missing?
+ * available on the FIFO RAM for all possible usecases. Make
Use cases. My spellchecker protests otherwise. :-)
WBR, Sergei
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