Re: [PATCH v2 0/6] Enable HDMI support on Exynos platforms

[Joonyoung Shim <jy0922.shim@samsung.com>]

Hi Tobias,

On 01/17/2015 07:44 AM, Tobias Jakobi wrote:
> Tobias Jakobi wrote:
>> Hello,
>>
>> so OK, this doesn't look too good.
>>
>> Tobias Jakobi wrote:
>>> I checked with my panel just now and played around a bit with the DRM
>>> (opening, vsync, etc.). However on deinitialization the entire system
>>> locked up. I currently haven't hooked the board up to the serial
>>> console, otherwise I would've tried to extract some more meaningful
>>> information.
>>>
>>> Going to check again more thoroughly on the weekend what exactly
>>> triggers the lockup.
>>
>> So, first of all I did my initial test with the exynos video backend of
>> RetroArch. But it turns out that there's no fancy application needed. I
>> now tested this with the 'modetest' application from libdrm, and did this:
>>
>> ./modetest -M exynos -s 16@13:1920x1080
>> setting mode 1920x1080-60Hz@XR24 on connectors 16, crtc 13
>> ^C
>> ./modetest -M exynos -s 16@13:640x480
>> setting mode 640x480-60Hz@XR24 on connectors 16, crtc 13
>> ^C
>> ./modetest -M exynos -s 16@13:640x480
>> setting mode 640x480-60Hz@XR24 on connectors 16, crtc 13
>> ^C
>> ./modetest -M exynos -s 16@13:640x480
>>
>> The board instantly died then. No kernel log output from the serial
>> console, the heartbeat just stops and the board is dead. Need to
>> power-cycle to get it running again.
>>
>> I'm unsure how to triage this at all.
>>
>> @Marek: Could you check if this also happens for you?
> 

Could you test after apply IOMMU v4 patchset of Marek and enable with
CONFIG_DRM_EXYNOS_IOMMU?

> In addition to the simple 'set mode' test, I also tried the 'vsync page
> flip' one:
> 
> ./modetest -M exynos -v -s 16@13:1280x720
> 
> While I haven't managed to lock up the system that way (I didn't try to
> repeatedly kill and start this test), I managed to produce kernel
> warnings that way.
> 

Hmm please refer below posted patch, same issue?

http://www.spinics.net/lists/dri-devel/msg75181.html

Thanks.

> Relevant parts here:
> [  108.173644] lcd0-power-domain: Power-on latency exceeded, new value
> 364958 ns
> [  108.174010] tv-power-domain: Power-on latency exceeded, new value
> 350083 ns
> [  192.632246] lcd0-power-domain: Power-on latency exceeded, new value
> 419499 ns
> [  192.632695] tv-power-domain: Power-on latency exceeded, new value
> 408167 ns
> [  195.257343] ------------[ cut here ]------------
> [  195.257379] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/drm_irq.c:1072
> drm_vblank_put+0xd8/0xf0()
> [  195.257385] Modules linked in: bridge stp llc bnep btrfs xor xor_neon
> zlib_inflate zlib_deflate raid6_pq ecb btusb bluetooth usb_storage
> [  195.257429] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.19.0-rc4+ #3
> [  195.257435] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
> [  195.257440] Backtrace:
> [  195.257462] [<c001212c>] (dump_backtrace) from [<c0012344>]
> (show_stack+0x18/0x1c)
> [  195.257468]  r6:c0595c30 r5:00000000 r4:c063ba90 r3:00000000
> [  195.257494] [<c001232c>] (show_stack) from [<c048f8f8>]
> (dump_stack+0x98/0xd8)
> [  195.257507] [<c048f860>] (dump_stack) from [<c0028f9c>]
> (warn_slowpath_common+0x88/0xb8)
> [  195.257512]  r5:00000430 r4:00000000
> [  195.257525] [<c0028f14>] (warn_slowpath_common) from [<c0029070>]
> (warn_slowpath_null+0x24/0x2c)
> [  195.257530]  r8:00200200 r7:ee3a9c00 r6:00000000 r5:ed89e380 r4:ed89e380
> [  195.257552] [<c002904c>] (warn_slowpath_null) from [<c0268fac>]
> (drm_vblank_put+0xd8/0xf0)
> [  195.257570] [<c0268ed4>] (drm_vblank_put) from [<c028156c>]
> (exynos_drm_crtc_finish_pageflip+0xc0/0xf0)
> [  195.257586] [<c02814ac>] (exynos_drm_crtc_finish_pageflip) from
> [<c0290358>] (mixer_irq_handler+0xdc/0x104)
> [  195.257591]  r10:c06527ee r9:ee1e26c0 r8:00000041 r7:00000801
> r6:ed804e68 r5:00000801
> [  195.257607]  r4:ed804e10
> [  195.257622] [<c029027c>] (mixer_irq_handler) from [<c00610b0>]
> (handle_irq_event_percpu+0x3c/0x138)
> [  195.257627]  r7:00000000 r6:00000000 r5:ee1e2720 r4:ed89e9c0
> [  195.257644] [<c0061074>] (handle_irq_event_percpu) from [<c00611f0>]
> (handle_irq_event+0x44/0x64)
> [  195.257649]  r10:00000000 r9:f0020000 r8:ee008000 r7:00000001
> r6:ed89e9c0 r5:ee1e2720
> [  195.257664]  r4:ee1e26c0
> [  195.257677] [<c00611ac>] (handle_irq_event) from [<c0063d84>]
> (handle_fasteoi_irq+0xb8/0x188)
> [  195.257683]  r6:c063be14 r5:ee1e2720 r4:ee1e26c0 r3:00000000
> [  195.257701] [<c0063ccc>] (handle_fasteoi_irq) from [<c0060748>]
> (generic_handle_irq+0x34/0x44)
> [  195.257706]  r6:00000000 r5:00000000 r4:00000041 r3:c0063ccc
> [  195.257723] [<c0060714>] (generic_handle_irq) from [<c0060a28>]
> (__handle_domain_irq+0x64/0xb8)
> [  195.257728]  r4:c0620a38 r3:00000062
> [  195.257741] [<c00609c4>] (__handle_domain_irq) from [<c0008604>]
> (gic_handle_irq+0x38/0x70)
> [  195.257746]  r8:c0625f08 r7:c062c944 r6:0000006b r5:0000007b
> r4:f002000c r3:c0625f08
> [  195.257769] [<c00085cc>] (gic_handle_irq) from [<c0012ec0>]
> (__irq_svc+0x40/0x74)
> [  195.257775] Exception stack(0xc0625f08 to 0xc0625f50)
> [  195.257785] 5f00:                   ffffffed 00000000 00000000
> c001fa80 c062c510 c062c4c4
> [  195.257794] 5f20: 00000000 00000000 c0625f60 c0624000 00000000
> c0625f5c c0625f60 c0625f50
> [  195.257801] 5f40: c000f780 c000f784 600f0053 ffffffff
> [  195.257806]  r9:c0624000 r8:c0625f60 r7:c0625f3c r6:ffffffff
> r5:600f0053 r4:c000f784
> [  195.257832] [<c000f744>] (arch_cpu_idle) from [<c0057ccc>]
> (cpu_startup_entry+0x19c/0x264)
> [  195.257845] [<c0057b30>] (cpu_startup_entry) from [<c048bba8>]
> (rest_init+0x8c/0x90)
> [  195.257850]  r7:ffffffff
> [  195.257863] [<c048bb1c>] (rest_init) from [<c05f0cd8>]
> (start_kernel+0x37c/0x388)
> [  195.257868]  r4:c062c5d8 r3:c0624000
> [  195.257882] [<c05f095c>] (start_kernel) from [<40008070>] (0x40008070)
> [  195.257888] ---[ end trace 540e9ba1a4f64db4 ]---
> [  204.079572] lcd0-power-domain: Power-on latency exceeded, new value
> 470417 ns
> [  204.080079] tv-power-domain: Power-on latency exceeded, new value
> 449208 ns
> 
> 
> So something is fishy...
> 
> With best wishes,
> Tobias
> 
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