From: Jean Delvare <khali@linux-fr.org>
To: Eugeni Dodonov <eugeni@dodonov.net>
Cc: Michael Buesch <mb@bu3sch.de>,
dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: [Intel-gfx] [PATCH 1/2] Give up on edid retries when i2c tells us that bus is not there
Date: Thu, 20 Oct 2011 15:13:55 +0200 [thread overview]
Message-ID: <20111020151355.306eecc4@endymion.delvare> (raw)
In-Reply-To: <20111020143339.59270702@endymion.delvare>
On Thu, 20 Oct 2011 14:33:39 +0200, Jean Delvare wrote:
> That being said, even then the whole probe sequence shouldn't exceed
> 10 ms, which I wouldn't expect a user to notice. The user-reported 4
> second delay when running xrandr can't be caused by this. 4 seconds for
> 15 attempts is 250 ms per attempt, this looks like a timeout due to
> non-functional bus, not a nack. Not that 250 ms is 1 jiffy for HZ=250,
D'oh. Today is not my day, I can't believe I wrote this :/ 1 jiffy is
obviously 4 ms only at HZ=250. So I can't explain why it is taking so
much time on the reporter's machine.
> which I guess was what the reporting user was running. So even with
> your patch, there's still 750 ms to wait, I don't think this is
> acceptable. You really have to fix that I2C bus or skip probing it.
This conclusion probably still holds.
--
Jean Delvare
next prev parent reply other threads:[~2011-10-20 13:14 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-17 13:12 [PATCH] Improvements in edid detection timings (final) Eugeni Dodonov
2011-10-17 13:12 ` [PATCH 1/2] Give up on edid retries when i2c tells us that bus is not there Eugeni Dodonov
2011-10-17 20:41 ` Keith Packard
2011-10-17 21:07 ` Eugeni Dodonov
2011-10-17 22:41 ` Keith Packard
2011-10-18 0:06 ` Eugeni Dodonov
2011-10-18 10:02 ` [Intel-gfx] " Dave Airlie
2011-10-18 13:14 ` Jean Delvare
2011-10-18 13:37 ` Eugeni Dodonov
2011-10-20 12:33 ` Jean Delvare
2011-10-20 12:40 ` Jean Delvare
2011-10-20 13:13 ` Jean Delvare [this message]
2011-10-20 13:18 ` Michael Büsch
2011-10-24 14:40 ` Eugeni Dodonov
2011-10-25 13:03 ` [PATCH] Give up on edid retries when i2c bus is not responding Eugeni Dodonov
2011-10-26 17:06 ` Eugeni Dodonov
2011-10-26 17:18 ` Chris Wilson
2011-10-26 17:35 ` Eugeni Dodonov
2011-10-30 15:53 ` [Intel-gfx] [PATCH 1/2] Give up on edid retries when i2c tells us that bus is not there Jean Delvare
2011-10-18 14:01 ` Alex Deucher
2011-11-01 0:31 ` [PATCH] edid candidate for -next Eugeni Dodonov
2011-11-01 0:31 ` [PATCH] Give up on edid retries when i2c bus is not responding Eugeni Dodonov
2011-10-31 19:45 ` [Intel-gfx] [PATCH 1/2] Give up on edid retries when i2c tells us that bus is not there Chris Wilson
2011-10-17 13:12 ` [PATCH 2/2] Check if the bus is valid prior to discovering edid Eugeni Dodonov
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