<div dir="ltr">Hello guys,<div><br></div><div>I can confirm this problem, I've seen it for ages on many kernels.</div><div><br></div><div>Right now the standard TechNexion supplied kernel (<a href="http://git.wandboard.org/git/kernel_imx.git/log/?h=jb4.3_1.1.0-ga__wandboard">http://git.wandboard.org/git/kernel_imx.git/log/?h=jb4.3_1.1.0-ga__wandboard</a>) has somewhat same problems:</div>
<div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">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.</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px">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.</div>
</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Everything locks up in here, 1 of 10 tries I had a luck getting backtraces:</div>
<div><div><font face="arial, sans-serif">[ 62.169747] INFO: rcu_sched_state detected stall on CPU 0 (t=6000 jiffies)</font></div><div><font face="arial, sans-serif">[ 62.191716] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 2, t=6002 jiffies)</font></div>
</div><div><font face="arial, sans-serif">< ... ></font></div><div><div>[ 64.162699] CPU1: stopping</div><div>[ 64.165420] [<8004e160>] (unwind_backtrace+0x0/0xdc) from [<800422c8>] (do_IPI+0xd4/0x19c)</div>
<div>[ 64.173695] [<800422c8>] (do_IPI+0xd4/0x19c) from [<8004718c>] (__irq_svc+0x4c/0xe4)</div><div>[ 64.181441] Exception stack(0xe206ff98 to 0xe206ffe0)</div><div>[ 64.186495] ff80: 00000000 00000001</div>
<div>[ 64.194680] ffa0: f40dc008 00000000 80606b90 e206e028 e206e000 8085ed3c 1000406a 412fc09a</div><div>[ 64.202864] ffc0: 00000000 00000000 00000001 e206ffe0 800536d8 80048238 80000013 ffffffff</div><div>[ 64.211050] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<80048238>] (default_idle+0x24/0x28)</div>
<div>[ 64.219235] [<80048238>] (default_idle+0x24/0x28) from [<800484bc>] (cpu_idle+0xb4/0x118)</div><div>[ 64.227419] [<800484bc>] (cpu_idle+0xb4/0x118) from [<105f9c94>] (0x105f9c94)</div><div>
[ 64.234557] CPU0: stopping</div><div>[ 64.237275] [<8004e160>] (unwind_backtrace+0x0/0xdc) from [<800422c8>] (do_IPI+0xd4/0x19c)</div><div>[ 64.245550] [<800422c8>] (do_IPI+0xd4/0x19c) from [<8004718c>] (__irq_svc+0x4c/0xe4)</div>
<div>[ 64.253295] Exception stack(0xe24c5d28 to 0xe24c5d70)</div><div>[ 64.258352] 5d20: 00000000 00000000 00000000 808a0860 00000202 80817cc0</div><div>[ 64.266535] 5d40: 80040ae8 e24c4030 0000000a 7f7fbfbc 808a0860 00000000 00000000 e24c5d70</div>
<div>[ 64.274717] 5d60: 80080590 80080020 20000113 ffffffff</div><div>[ 64.279780] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<80080020>] (__do_softirq+0x70/0x15c)</div><div>[ 64.288054] [<80080020>] (__do_softirq+0x70/0x15c) from [<80080590>] (irq_exit+0x4c/0xa4)</div>
<div>[ 64.296240] [<80080590>] (irq_exit+0x4c/0xa4) from [<800421d0>] (do_local_timer+0x5c/0x80)</div><div>[ 64.304514] [<800421d0>] (do_local_timer+0x5c/0x80) from [<8004718c>] (__irq_svc+0x4c/0xe4)</div>
<div>[ 64.312868] Exception stack(0xe24c5dd0 to 0xe24c5e18)</div><div>[ 64.317923] 5dc0: e2013800 e223c3c8 e24c5e18 00000000</div><div>[ 64.326107] 5de0: e2013800 e223c3c8 00000000 e24c5f28 e2017738 00000038 8028075c 00000000</div>
<div>[ 64.334289] 5e00: 00000000 e24c5e18 8027f4b8 8007aab0 60000013 ffffffff</div><div>[ 64.340912] [<8004718c>] (__irq_svc+0x4c/0xe4) from [<8007aab0>] (console_lock+0x20/0x60)</div><div>[ 64.349099] [<8007aab0>] (console_lock+0x20/0x60) from [<8027f4b8>] (mxc_hdmi_notify_fb+0x3c/0x74)</div>
<div>[ 64.358068] [<8027f4b8>] (mxc_hdmi_notify_fb+0x3c/0x74) from [<80280748>] (mxc_hdmi_set_mode+0xf4/0x108)</div><div>[ 64.367556] [<80280748>] (mxc_hdmi_set_mode+0xf4/0x108) from [<80280944>] (hotplug_worker+0x1e8/0x340)</div>
<div>[ 64.376870] [<80280944>] (hotplug_worker+0x1e8/0x340) from [<8008e6d4>] (process_one_work+0x1f8/0x318)</div><div>[ 64.386187] [<8008e6d4>] (process_one_work+0x1f8/0x318) from [<8008ee00>] (worker_thread+0x1b0/0x2d0)</div>
<div>[ 64.395416] [<8008ee00>] (worker_thread+0x1b0/0x2d0) from [<80092df8>] (kthread+0x7c/0x84)</div><div>[ 64.403690] [<80092df8>] (kthread+0x7c/0x84) from [<80048154>] (kernel_thread_exit+0x0/0x8)</div>
</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">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.</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">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?</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Also, 3.0.35 kernels from freescale had this check enabled: <a href="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">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</a><u> </u>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.</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Anyway, I'm ready to test anything on my HDMI setup that is known to lockup the board.</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Best Regards,</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
Dmitriy Beykun</div><div class="gmail_extra"><br><div class="gmail_quote">2014-03-24 20:16 GMT+04:00 John Weber <span dir="ltr"><<a href="mailto:rjohnweber@gmail.com" target="_blank">rjohnweber@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Jacob,<div class=""><br>
<br>
On 3/24/14, 10:10 AM, Otavio Salvador wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello Kroon,<br>
<br>
On Mon, Mar 17, 2014 at 6:06 AM, Jacob Kroon <<a href="mailto:jacob.kroon@gmail.com" target="_blank">jacob.kroon@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
Just some test reporting, I finally got the 3.10.17 linux-imx kernel from<br>
meta-fsl-arm working with my Sony TV, but I had to revert commit<br>
<br>
ce224e3c4fc3c1b00a94641c28724b<u></u>e2adcd78be<br>
"ENGR00288972 HDMI: unmask overflow interrupter when HDMI phy power on"<br>
<br>
otherwise the kernel would lockup once I plugged in the HDMI-cable.<br>
This was on a Wandboard Solo. linux-wandboard 3.10.17 kernel from<br>
meta-fsl-arm-extra showed the same problem, I didn't test if reverting the<br>
same commit would solve the problem but I'm guessing so.<br>
</blockquote></blockquote></div>
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.<div class="im HOEnZb">
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Did you find out why this was need?<br>
<br>
I am adding John and Trevor in Cc so they can comment on this.<br></blockquote></div></blockquote></div><br></div></div>