On Wednesday, December 16, 2015 at 12:35:23 AM, Stephen Warren wrote:
On 11/13/2015 06:16 PM, Marek Vasut wrote:
On Friday, November 13, 2015 at 09:34:09 PM, Stephen Warren wrote:
From: Stephen Warren swarren@nvidia.com
When CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP is enabled, use a GET_REPORT control transfer to retrieve the initial state of the keyboard. This matches the technique used to poll the keyboard state. This is useful since it eliminates the remaining use of interrupt transfers from the USB keyboard driver, which allows it to work with USB HCD that don't support interrupt transfers.
Cc: Hans de Goede hdegoede@redhat.com Signed-off-by: Stephen Warren swarren@nvidia.com
Are there any disadvantages to using control transfers over interrupt transfers? I'm not aware of any, but I assume there must be a reason that U-Boot typically uses interrupt transfers.
I initially implemented the control EP polling because I had a keyboard which had issues with interrupt transfers.
Reviewed-by: Marek Vasut marex@denx.de
Did you intend someone else to apply this?
Is the discussion concluded already? I was under the impression that there was no general agreement.
Otherwise I can pick this of course.
Best regards, Marek Vasut