linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Jacob Kroon]

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Hi,

Just some test reporting, I finally got the 3.10.17 linux-imx kernel from
meta-fsl-arm working with my Sony TV, but I had to revert commit

ce224e3c4fc3c1b00a94641c28724be2adcd78be
"ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"

otherwise the kernel would lockup once I plugged in the HDMI-cable.
This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from
meta-fsl-arm-extra showed the same problem, I didn't test if reverting the
same commit would solve the problem but I'm guessing so.

-- Jacob

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Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Otavio Salvador]

Hello Kroon,

On Mon, Mar 17, 2014 at 6:06 AM, Jacob Kroon <jacob.kroon@gmail.com> wrote:
> Hi,
>
> Just some test reporting, I finally got the 3.10.17 linux-imx kernel from
> meta-fsl-arm working with my Sony TV, but I had to revert commit
>
> ce224e3c4fc3c1b00a94641c28724be2adcd78be
> "ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"
>
> otherwise the kernel would lockup once I plugged in the HDMI-cable.
> This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from
> meta-fsl-arm-extra showed the same problem, I didn't test if reverting the
> same commit would solve the problem but I'm guessing so.

Did you find out why this was  need?

I am adding John and Trevor in Cc so they can comment on this.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750

Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Jacob Kroon]

Hi Otavio,

On Mon, 24 Mar 2014, Otavio Salvador wrote:

> Hello Kroon,
>
> On Mon, Mar 17, 2014 at 6:06 AM, Jacob Kroon <jacob.kroon@gmail.com> wrote:
>> Hi,
>>
>> Just some test reporting, I finally got the 3.10.17 linux-imx kernel from
>> meta-fsl-arm working with my Sony TV, but I had to revert commit
>>
>> ce224e3c4fc3c1b00a94641c28724be2adcd78be
>> "ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"
>>
>> otherwise the kernel would lockup once I plugged in the HDMI-cable.
>> This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from
>> meta-fsl-arm-extra showed the same problem, I didn't test if reverting the
>> same commit would solve the problem but I'm guessing so.
>
> Did you find out why this was  need?
>

Not the details I'm afraid, I used a JTAG adapter and saw that the kernel 
always got stuck in what looked like the hdmi interrupt handler, and this 
commit looked related, so I just tried with reverting it.

I'll try and look more into it once I have some free time.

> I am adding John and Trevor in Cc so they can comment on this.
>
> -- 
> Otavio Salvador                             O.S. Systems
> http://www.ossystems.com.br        http://code.ossystems.com.br
> Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750
>

Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[John Weber]

Hi Jacob,

On 3/24/14, 10:10 AM, Otavio Salvador wrote:
> Hello Kroon,
>
> On Mon, Mar 17, 2014 at 6:06 AM, Jacob Kroon <jacob.kroon@gmail.com> wrote:
>> Hi,
>>
>> Just some test reporting, I finally got the 3.10.17 linux-imx kernel from
>> meta-fsl-arm working with my Sony TV, but I had to revert commit
>>
>> ce224e3c4fc3c1b00a94641c28724be2adcd78be
>> "ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"
>>
>> otherwise the kernel would lockup once I plugged in the HDMI-cable.
>> This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from
>> meta-fsl-arm-extra showed the same problem, I didn't test if reverting the
>> same commit would solve the problem but I'm guessing so.
While there are some issues with the 3.10.17 kernel for Wandboard with HDMI, I'm 
not aware of this one.  Then again, I don't have a Sony HDMI monitor.  I've been 
working with an Acer 22" monitor with HDMI input.  I suspect that most of the 
problems I've seen are related to the lack of working EDID on Wandboard.
> Did you find out why this was  need?
>
> I am adding John and Trevor in Cc so they can comment on this.
>

Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Dmitriy B.]

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Hello guys,

I can confirm this problem, I've seen it for ages on many kernels.

Right now the standard TechNexion supplied kernel (
http://git.wandboard.org/git/kernel_imx.git/log/?h=jb4.3_1.1.0-ga__wandboard)
has somewhat same problems:
1) When
setting videomode=display0=dev=lcd0,mode=CUSTOM_DISPLAY,if=RGB24,bpp=24
display1=dev=hdmi0,mode=1280x720MR-16@60,if=RGB24,bpp=32 or similar - board
locks up with RCU stall/hard lockup when HDMI is connected.
2) When setting videomode=display0=dev=hdmi0,mode=1280x720@60,if=RGB24,bpp=32
board works only when HDMI cable is connected. If HDMI cable is
disconnected - system locks up.

Everything locks up in here, 1 of 10 tries I had a luck getting backtraces:
[   62.169747] INFO: rcu_sched_state detected stall on CPU 0 (t=6000
jiffies)
[   62.191716] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0}
(detected by 2, t=6002 jiffies)
< ... >
[   64.162699] CPU1: stopping
[   64.165420] [<8004e160>] (unwind_backtrace+0x0/0xdc) from [<800422c8>]
(do_IPI+0xd4/0x19c)
[   64.173695] [<800422c8>] (do_IPI+0xd4/0x19c) from [<8004718c>]
(__irq_svc+0x4c/0xe4)
[   64.181441] Exception stack(0xe206ff98 to 0xe206ffe0)
[   64.186495] ff80:
00000000 00000001
[   64.194680] ffa0: f40dc008 00000000 80606b90 e206e028 e206e000 8085ed3c
1000406a 412fc09a
[   64.202864] ffc0: 00000000 00000000 00000001 e206ffe0 800536d8 80048238
80000013 ffffffff
[   64.211050] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<80048238>]
(default_idle+0x24/0x28)
[   64.219235] [<80048238>] (default_idle+0x24/0x28) from [<800484bc>]
(cpu_idle+0xb4/0x118)
[   64.227419] [<800484bc>] (cpu_idle+0xb4/0x118) from [<105f9c94>]
(0x105f9c94)
[   64.234557] CPU0: stopping
[   64.237275] [<8004e160>] (unwind_backtrace+0x0/0xdc) from [<800422c8>]
(do_IPI+0xd4/0x19c)
[   64.245550] [<800422c8>] (do_IPI+0xd4/0x19c) from [<8004718c>]
(__irq_svc+0x4c/0xe4)
[   64.253295] Exception stack(0xe24c5d28 to 0xe24c5d70)
[   64.258352] 5d20:                   00000000 00000000 00000000 808a0860
00000202 80817cc0
[   64.266535] 5d40: 80040ae8 e24c4030 0000000a 7f7fbfbc 808a0860 00000000
00000000 e24c5d70
[   64.274717] 5d60: 80080590 80080020 20000113 ffffffff
[   64.279780] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<80080020>]
(__do_softirq+0x70/0x15c)
[   64.288054] [<80080020>] (__do_softirq+0x70/0x15c) from [<80080590>]
(irq_exit+0x4c/0xa4)
[   64.296240] [<80080590>] (irq_exit+0x4c/0xa4) from [<800421d0>]
(do_local_timer+0x5c/0x80)
[   64.304514] [<800421d0>] (do_local_timer+0x5c/0x80) from [<8004718c>]
(__irq_svc+0x4c/0xe4)
[   64.312868] Exception stack(0xe24c5dd0 to 0xe24c5e18)
[   64.317923] 5dc0:                                     e2013800 e223c3c8
e24c5e18 00000000
[   64.326107] 5de0: e2013800 e223c3c8 00000000 e24c5f28 e2017738 00000038
8028075c 00000000
[   64.334289] 5e00: 00000000 e24c5e18 8027f4b8 8007aab0 60000013 ffffffff
[   64.340912] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<8007aab0>]
(console_lock+0x20/0x60)
[   64.349099] [<8007aab0>] (console_lock+0x20/0x60) from [<8027f4b8>]
(mxc_hdmi_notify_fb+0x3c/0x74)
[   64.358068] [<8027f4b8>] (mxc_hdmi_notify_fb+0x3c/0x74) from
[<80280748>] (mxc_hdmi_set_mode+0xf4/0x108)
[   64.367556] [<80280748>] (mxc_hdmi_set_mode+0xf4/0x108) from
[<80280944>] (hotplug_worker+0x1e8/0x340)
[   64.376870] [<80280944>] (hotplug_worker+0x1e8/0x340) from [<8008e6d4>]
(process_one_work+0x1f8/0x318)
[   64.386187] [<8008e6d4>] (process_one_work+0x1f8/0x318) from
[<8008ee00>] (worker_thread+0x1b0/0x2d0)
[   64.395416] [<8008ee00>] (worker_thread+0x1b0/0x2d0) from [<80092df8>]
(kthread+0x7c/0x84)
[   64.403690] [<80092df8>] (kthread+0x7c/0x84) from [<80048154>]
(kernel_thread_exit+0x0/0x8)

I've sent this to TechNexion (Tapani, Edward and other guys) 4 days ago,
but it looks like they seem to not care. I hope they are just busy and will
notice this at some point.

I still did not find time to test 3.10.y on wandboard, but I guess it will
have same problems, Jacob, is this what you see running JTAG trace?

Also, 3.0.35 kernels from freescale had this check enabled:
http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/mach-mx6/board-mx6q_sabrelite.c?h=imx_3.0.35_4.1.0#n883
 Does 3.10.y have this? HDMI core is different on different tapeouts and
I'm not sure if wandboard has all boards with same CPU revision, especially
Solo/DL.

Anyway, I'm ready to test anything on my HDMI setup that is known to lockup
the board.

Best Regards,
Dmitriy Beykun

2014-03-24 20:16 GMT+04:00 John Weber <rjohnweber@gmail.com>:

> Hi Jacob,
>
>
> On 3/24/14, 10:10 AM, Otavio Salvador wrote:
>
>> Hello Kroon,
>>
>> On Mon, Mar 17, 2014 at 6:06 AM, Jacob Kroon <jacob.kroon@gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> Just some test reporting, I finally got the 3.10.17 linux-imx kernel from
>>> meta-fsl-arm working with my Sony TV, but I had to revert commit
>>>
>>> ce224e3c4fc3c1b00a94641c28724be2adcd78be
>>> "ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"
>>>
>>> otherwise the kernel would lockup once I plugged in the HDMI-cable.
>>> This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from
>>> meta-fsl-arm-extra showed the same problem, I didn't test if reverting
>>> the
>>> same commit would solve the problem but I'm guessing so.
>>>
>> While there are some issues with the 3.10.17 kernel for Wandboard with
> HDMI, I'm not aware of this one.  Then again, I don't have a Sony HDMI
> monitor.  I've been working with an Acer 22" monitor with HDMI input.  I
> suspect that most of the problems I've seen are related to the lack of
> working EDID on Wandboard.
>
>  Did you find out why this was  need?
>>
>> I am adding John and Trevor in Cc so they can comment on this.
>>
>

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Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Trevor Woerner]

Hi Jacob,

On 03/24/14 11:44, Jacob Kroon wrote:
> Not the details I'm afraid, I used a JTAG adapter and saw that the
> kernel always got stuck in what looked like the hdmi interrupt
> handler, and this commit looked related, so I just tried with
> reverting it.

I'm curious to know more about using a JTAG with the wandboard. Were you
following the instructions from here:
http://wiki.wandboard.org/index.php/Main_Page#JTAG

Or are you doing something else?

Do you have any procedures?

Best regards,
    Trevor

Re: linux-imx/linux-wandboard 3.10.17 kernel and HDMI display

[Jacob Kroon]

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Hi Trevor,

On Tue, Mar 25, 2014 at 12:54 AM, Trevor Woerner
<trevor.woerner@linaro.org>wrote:

> Hi Jacob,
>
> On 03/24/14 11:44, Jacob Kroon wrote:
> > Not the details I'm afraid, I used a JTAG adapter and saw that the
> > kernel always got stuck in what looked like the hdmi interrupt
> > handler, and this commit looked related, so I just tried with
> > reverting it.
>
> I'm curious to know more about using a JTAG with the wandboard. Were you
> following the instructions from here:
> http://wiki.wandboard.org/index.php/Main_Page#JTAG
>
> Or are you doing something else?
>
> Do you have any procedures?
>
> Best regards,
>     Trevor
>

Yeah, it was a Segger J-Link, I just followed what information I could find
on google, using target gdb from the generated SDK with the kernel image
from kernel-vmlinux package.

  -- Jacob

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