Hi Jean, On Tue, 2012-06-05 at 14:17 +0200, Jean Pihet wrote: > Hi Tomi,
> I am using a mainline kernel (3.5.0-rc1) with the patches below integrated. > I have an issue with suspend/resume on OMAP3 Beagleboard, where the > system hangs at resume time. > > Here below is a log with the option no_console_suspend set and a few > added messages in case of null pointer in _od_resume_noirq. > It looks like there is no omap_device associated to the "omapdss_dpi" pdev. > > What do you think? How to fix this? > Sorry I know there have been some discussions on the lists but I am > not aware of all the details in the devices creation for DSS. > > / # echo mem > /sys/power/state > [ 23.262298] PM: Syncing filesystems ... done. > [ 23.295501] Freezing user space processes ... (elapsed 0.02 seconds) done. > [ 23.326507] Freezing remaining freezable tasks ... (elapsed 0.02 seconds) > don > e. > [ 23.502197] PM: suspend of devices complete after 163.766 msecs > [ 23.511932] PM: late suspend of devices complete after 3.418 msecs > [ 23.524444] PM: noirq suspend of devices complete after 5.860 msecs > [ 23.531249] Disabling non-boot CPUs ... > [ 24.476562] Powerdomain (per_pwrdm) didn't enter target state 1 > [ 24.482818] Powerdomain (core_pwrdm) didn't enter target state 1 > [ 24.489166] Could not enter target state in pm_suspend > [ 24.495147] *** _od_resume_noirq: od=NULL, dev=0xc78bcc08 > [ 24.500915] *** _od_resume_noirq: od=NULL, pdev=0xc78bcc00 > [ 24.506805] *** _od_resume_noirq: od=NULL, pdev->name:omapdss_dpi > [ 24.513336] Unable to handle kernel NULL pointer dereference at virtual > addre > ss 00000018 > [ 24.521942] pgd = c62f0000 > [ 24.524841] [00000018] *pgd=862c1831, *pte=00000000, *ppte=00000000 > [ 24.531524] Internal error: Oops: 17 [#1] SMP ARM > [ 24.536529] Modules linked in: > [ 24.539764] CPU: 0 Not tainted (3.5.0-rc1-00010-g5041caa-dirty #131) > [ 24.546844] PC is at _od_resume_noirq+0x1c/0xac > [ 24.551635] LR is at _od_resume_noirq+0x94/0xac > ... I'm on leave currently, so I can't test it right now. But can you try the attached patch? Or even better, try merging the tag: git://gitorious.org/linux-omap-dss2/linux.git tags/omapdss-for-3.5-rc2 which contains the included patch plus a couple other fixes. Tomi
From 4ea30e9e0f2956b2ebcf1e81ac08d7c6691cf32d Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkei...@ti.com>
Date: Tue, 5 Jun 2012 13:17:32 +0300
Subject: [PATCH] OMAPDSS: fix registration of DPI and SDI devices
The omapdss arch initialization code registers all the output devices as
omap_devices. However, DPI and SDI are not proper omap_devices, as they
do not have any corresponding HWMOD. This leads to crashes or problems
when the platform code tries to use omap_device functions for DPI and
SDI devices.
One such crash was reported by John Stultz <johns...@us.ibm.com>:
[ 18.756835] Unable to handle kernel NULL pointer dereference at
virtual addr8
[ 18.765319] pgd = ea6b8000
[ 18.768188] [00000018] *pgd=aa942831, *pte=00000000, *ppte=00000000
[ 18.774749] Internal error: Oops: 17 [#1] SMP ARM
[ 18.779663] Modules linked in:
[ 18.782836] CPU: 0 Not tainted (3.5.0-rc1-dirty #456)
[ 18.788482] PC is at _od_resume_noirq+0x1c/0x78
[ 18.793212] LR is at _od_resume_noirq+0x6c/0x78
[ 18.797943] pc : [<c00307ec>] lr : [<c003083c>] psr: 20000113
[ 18.797943] sp : ec3abe80 ip : ec3abdb8 fp : 00000006
[ 18.809936] r10: ec1148b8 r9 : c08a48f0 r8 : c00307d0
[ 18.815368] r7 : 00000000 r6 : 00000000 r5 : ec114800 r4 :
ec114808
[ 18.822174] r3 : 00000000 r2 : 00000000 r1 : ec154fe8 r0 :
00000006
[ 18.829010] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM
Segment user
[ 18.836456] Control: 10c5387d Table: aa6b804a DAC: 00000015
[ 18.842437] Process sh (pid: 1139, stack limit = 0xec3aa2f0)
[ 18.848358] Stack: (0xec3abe80 to 0xec3ac000)
DPI and SDI can be plain platform_devices. This patch changes the
registration from omap_device_register() to platform_device_add().
Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
Reported-by: John Stultz <johns...@us.ibm.com>
---
arch/arm/mach-omap2/display.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 54d49dd..5fb47a1 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -271,9 +271,9 @@ static struct platform_device *create_simple_dss_pdev(const char *pdev_name,
goto err;
}
- r = omap_device_register(pdev);
+ r = platform_device_add(pdev);
if (r) {
- pr_err("Could not register omap_device for %s\n", pdev_name);
+ pr_err("Could not register platform_device for %s\n", pdev_name);
goto err;
}
--
1.7.9.5
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