From: "Joe Woodward" <jw@terrafix.co.uk>
To: linux-fbdev@vger.kernel.org
Subject: OMAP DSS2/PM on 3.2 broken?
Date: Wed, 11 Jan 2012 13:57:42 +0000 [thread overview]
Message-ID: <WC20120111135742.2002AC@terrafix.co.uk> (raw)
[origianlly sent to the Linux OMAP mailing list, but forwarded as suggested (see http://marc.info/?l=linux-omap&m\x132611662919592&w=2)]
I'm running on a Gumstix Overo (OMAP3530) with an 24-bit LCD panel connected via the DSS2 DPI interface (using the generic panel driver).
Entering standby used to work just fine on 3.0, but on 3.2 I get the following:
# echo mem > /sys/power/state
[ 23.186279] PM: Syncing filesystems ... done.
[ 23.194244] Freezing user space processes ... (elapsed 0.01 seconds)
done.
[ 23.219543] Freezing remaining freezable tasks ... (elapsed 0.02
seconds) done.
[ 23.251037] Suspending console(s) (use no_console_suspend to debug)
[ 23.554656] PM: suspend of devices complete after 296.417 msecs
[ 23.561859] PM: late suspend of devices complete after 6.957 msecs
[ 24.464813] Successfully put all powerdomains to target state
[ 24.466674] ------------[ cut here ]------------
[ 24.466857] WARNING: at drivers/video/omap2/dss/dss.c:713 0xc01350f8()
[ 24.467010] Modules linked in:
[ 24.467132] Backtrace:
[ 24.467254] Function entered at [<c0010c3c>] from [<c02c4a60>]
[ 24.467407] r6:c02ffdaa r5:000002c9 r4:00000000 r3:00000000
[ 24.467651] Function entered at [<c02c4a48>] from [<c00344d0>]
[ 24.467803] Function entered at [<c003447c>] from [<c003450c>]
[ 24.467926] r8:00000000 r7:c0390a84 r6:c00288a4 r5:c037b85c
r4:fffffff3
[ 24.468200] r3:00000009
[ 24.468322] Function entered at [<c00344e8>] from [<c01350f8>]
[ 24.468475] Function entered at [<c01350ac>] from [<c013595c>]
[ 24.468597] r4:dec50208 r3:c013594c
[ 24.468780] Function entered at [<c013594c>] from [<c0182724>]
[ 24.468902] r6:c00288a4 r5:c037b85c r4:dec50208 r3:c013594c
[ 24.469177] Function entered at [<c01826f0>] from [<c0028900>]
[ 24.469299] Function entered at [<c00288a4>] from [<c01836f4>]
[ 24.469421] r4:dec50208 r3:00000000
[ 24.469604] Function entered at [<c0183614>] from [<c0183d20>]
[ 24.469726] r9:c02d7044 r8:00000000 r6:dec5025c r5:00000010
r4:dec50208
[ 24.470031] Function entered at [<c0183c54>] from [<c0063aa4>]
[ 24.470153] r8:c02ca888 r7:00000000 r6:00000003 r5:00000000
r4:00000000
[ 24.470458] Function entered at [<c006391c>] from [<c0063c60>]
[ 24.470581] r7:00000004 r6:00000000 r5:c02ca87c r4:00000003
[ 24.471130] Function entered at [<c0063b50>] from [<c0062ad4>]
[ 24.471282] r6:00000003 r5:00000003 r4:c6a87000 r3:0000006d
[ 24.471557] Function entered at [<c0062a2c>] from [<c0117728>]
[ 24.471679] Function entered at [<c011770c>] from [<c00e2ab0>]
[ 24.471832] Function entered at [<c00e29a0>] from [<c0098c98>]
[ 24.471954] Function entered at [<c0098be4>] from [<c0098f14>]
[ 24.472076] r8:00000004 r7:00000000 r6:00000000 r5:000ac750
r4:d8a70dc0
[ 24.472412] Function entered at [<c0098ed0>] from [<c000dcc0>]
[ 24.472534] r8:c000de44 r7:00000004 r6:000ac750 r5:00000004
r4:000a8e38
[ 24.472839] ---[ end trace 9f4f3053f6637dae ]---
[ 24.475006] PM: early resume of devices complete after 8.666 msecs
[ 25.040344] PM: resume of devices complete after 560.943 msecs
[ 25.277801] Restarting tasks ... done.
At which point the screen either restarts, or sometimes flickers and I get the following:
[ 22.578796] omapdss DISPC error: SYNC_LOST on channel lcd, restarting the output with video overlays disabled
[ 23.391571] omapdss DISPC error: SYNC_LOST on channel lcd, restarting the output with video overlays disabled
[ 24.391571] omapdss DISPC error: SYNC_LOST on channel lcd, restarting the output with video overlays disabled
It normally recovers after doing this for a while...
I'm assuming the problems started when DSS2 was adapted to runtime PM by Tomi as the warning comes from dss_runtime_get()?
Anyone have any ideas?
Cheers,
Joe
reply other threads:[~2012-01-11 13:57 UTC|newest]
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