From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Frysinger Date: Wed, 9 Nov 2011 20:09:02 -0500 Subject: [U-Boot] [PATCH] usb: increase delay after port reset In-Reply-To: <1320883438-12274-1-git-send-email-yanok@emcraft.com> References: <1320883438-12274-1-git-send-email-yanok@emcraft.com> Message-ID: <201111092009.03751.vapier@gentoo.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Wednesday 09 November 2011 19:03:58 Ilya Yanok wrote: > In our setup (OMAP3 EHCI host, keyboard, mouse mass storage and BT > dongle devices connected via several hubs) keyboard fails to initialize > during the bus scan (stalled endpoint while get_descriptor/64) and after > that keyboard is unusable (even in Linux) until power off/on. > > Increasing the delay after port reset from 200ms to 260ms solves this > problem. ugh. this doesn't sound like the right way to fix things. looks like Linux has added a dynamic polling state that automatically deals with broken devices. look at its hub_port_debounce. seems like we should implement something like that instead of delaying longer and longer and making the situation needlessly worse for most systems. -mike -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 836 bytes Desc: This is a digitally signed message part. Url : http://lists.denx.de/pipermail/u-boot/attachments/20111109/d8433847/attachment.pgp