Re: [PATCH] ARM: dts: Add am335x mcasp with l3 data port ranges

[Peter Ujfalusi <peter.ujfalusi@ti.com>]

On 11/12/2018 10.20, Peter Ujfalusi wrote:
> Tony,
> 
> On 11/12/2018 9.11, Peter Ujfalusi wrote:
>> Tony,
>>
>> On 10/12/2018 19.23, Tony Lindgren wrote:
>>> * Peter Ujfalusi <peter.ujfalusi@ti.com> [181210 17:00]:
>>>> On 10/12/2018 18.38, Tony Lindgren wrote:
>>>>> OK so to prevent the hwmod code from resetting gpios very
>>>>> early, this now might become necessary. Care to try with
>>>>> this also applied?
>>>>
>>>> With this applied there is life on the console, however it ends up badly:
>>>
>>> OK thanks for testing. I'll take a look on how to skip
>>> early reset for omap_hwmod.c for the dts case instead of
>>> dropping the sysc platform data.
>>>
>>> For the LCDC, does the following revert fix it? If so,
>>> I need to check the flags for am33xx_lcdc_hwmod
>>> HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY.
>>
>> Unfortunately, not :(
>>
>> I have applied the two patch you have sent, plus this (next-20181210):
>> [    3.481142] OF: graph: no port node found in /ocp/lcdc@4830e000
>> [    3.487627] OF: graph: no port node found in /ocp/lcdc@4830e000
>> [    3.494810] Unable to handle kernel NULL pointer dereference at virtual address 00000000
>> [    3.503182] pgd = (ptrval)
>> [    3.505957] [00000000] *pgd=00000000
>> [    3.509645] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
>> [    3.514986] Modules linked in:
>> [    3.518068] CPU: 0 PID: 66 Comm: kworker/0:3 Not tainted 4.20.0-rc6-next-20181210-00104-g77bc75e7d444 #277
>> [    3.527763] Hardware name: Generic AM33XX (Flattened Device Tree)
>> [    3.533906] Workqueue: events dbs_work_handler
>> [    3.538393] PC is at tilcdc_crtc_update_clk+0xc/0x98
>> [    3.543387] LR is at cpufreq_transition+0x1c/0x24
>> [    3.548112] pc : [<c057e524>]    lr : [<c057fd50>]    psr: 60000013
>> [    3.554408] sp : cf5e5e20  ip : 0ee06000  fp : 00000000
>> [    3.559655] r10: ffffffff  r9 : cf5e5ebc  r8 : 00000000
>> [    3.564904] r7 : 00000001  r6 : cf5e5ebc  r5 : 00000000  r4 : 00000000
>> [    3.571461] r3 : c057fd34  r2 : cf5e5ebc  r1 : 00000001  r0 : 00000000
>> [    3.578020] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
>> [    3.585188] Control: 10c5387d  Table: 80004019  DAC: 00000051
>> [    3.590961] Process kworker/0:3 (pid: 66, stack limit = 0x(ptrval))
>> [    3.597257] Stack: (0xcf5e5e20 to 0xcf5e6000)
>> [    3.601641] 5e20: 00000000 fffffffe cf5e5ebc 00000001 00000000 c057fd50 00000000 c01555d8
>> [    3.609862] 5e40: c0e6a26c c0e6a258 00000000 00000000 00000001 c015599c 00000000 c06e5548
>> [    3.618082] 5e60: cf5e5ebc cf5c3a00 c0e09264 c0e6a258 00000003 00000000 000afc80 c01559d0
>> [    3.626303] 5e80: 00000000 000afc80 cf5c3a00 c06e9994 cf5c3a00 cf5e5ebc 00000000 c0eae910
>> [    3.634523] 5ea0: 00000003 c06e9a64 cf5c3a00 00000000 c0e09108 c06e9f94 cf5e1900 00000000
>> [    3.642745] 5ec0: 000927c0 000afc80 00000021 71a56597 cf159688 cf5c3a00 cf5e1900 cf5d9a80
>> [    3.650966] 5ee0: cf5d9a80 cf5e1880 cf5e1880 cf5e193c ffffe000 c06ed2c8 cf5e1938 cf5de080
>> [    3.659187] 5f00: cf5e1904 cf5c3a00 c0e6a5d4 00000000 cf5e193c c06edd80 cf5e1938 cf5de080
>> [    3.667408] 5f20: cfb69ec0 cfb6d000 00000000 c014e284 00000008 cfb69ed8 cf5de080 cf5de094
>> [    3.675628] 5f40: cfb69ec0 00000008 cfb69ed8 c0e03d00 cfb69ec0 c014ef74 cf5dd000 cf5d9fc0
>> [    3.683849] 5f60: ffffe000 00000000 cf5dd000 cf5d9fc0 cf5e4000 cf5de080 c014ef48 cf05feac
>> [    3.692069] 5f80: cf5dd01c c0153d40 00000000 cf5d9fc0 c0153c10 00000000 00000000 00000000
>> [    3.700289] 5fa0: 00000000 00000000 00000000 c01010e8 00000000 00000000 00000000 00000000
>> [    3.708509] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>> [    3.716730] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
>> [    3.724969] [<c057e524>] (tilcdc_crtc_update_clk) from [<c057fd50>] (cpufreq_transition+0x1c/0x24)
>> [    3.733986] [<c057fd50>] (cpufreq_transition) from [<c01555d8>] (notifier_call_chain+0x48/0x80)
>> [    3.742734] [<c01555d8>] (notifier_call_chain) from [<c015599c>] (__srcu_notifier_call_chain+0x44/0x60)
>> [    3.752178] [<c015599c>] (__srcu_notifier_call_chain) from [<c01559d0>] (srcu_notifier_call_chain+0x18/0x20)
>> [    3.762067] [<c01559d0>] (srcu_notifier_call_chain) from [<c06e9994>] (cpufreq_notify_transition+0x64/0x110)
>> [    3.771949] [<c06e9994>] (cpufreq_notify_transition) from [<c06e9a64>] (cpufreq_freq_transition_end+0x24/0x90)
>> [    3.782003] [<c06e9a64>] (cpufreq_freq_transition_end) from [<c06e9f94>] (__cpufreq_driver_target+0x1b8/0x514)
>> [    3.792059] [<c06e9f94>] (__cpufreq_driver_target) from [<c06ed2c8>] (od_dbs_update+0x130/0x15c)
>> [    3.800892] [<c06ed2c8>] (od_dbs_update) from [<c06edd80>] (dbs_work_handler+0x28/0x58)
>> [    3.808941] [<c06edd80>] (dbs_work_handler) from [<c014e284>] (process_one_work+0x1e4/0x3f4)
>> [    3.817424] [<c014e284>] (process_one_work) from [<c014ef74>] (worker_thread+0x2c/0x574)
>> [    3.825564] [<c014ef74>] (worker_thread) from [<c0153d40>] (kthread+0x130/0x148)
>> [    3.833004] [<c0153d40>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
>> [    3.840259] Exception stack(0xcf5e5fb0 to 0xcf5e5ff8)
>> [    3.845335] 5fa0:                                     00000000 00000000 00000000 00000000
>> [    3.853555] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>> [    3.861773] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>> [    3.868428] Code: e12fff1e e92d41f0 e1a04000 e1a05000 (e4946014) 
>> [    3.874674] ---[ end trace d8042f7454b3c9d1 ]---
>> [    3.883368] mmc1: new SDIO card at address 0001
>> [    3.889008] OF: graph: no port node found in /ocp/lcdc@4830e000
>> [    3.895127] tilcdc 4830e000.lcdc: no encoders/connectors found
> 
> It looks like there is a bug in tilcdc as well, but the display is not
> coming up because the backlight is not proping:
> [    0.618627] ecap 48304000.epwmss:ecap@48304100: invalid resource
> [    0.618822] ecap: probe of 48304000.epwmss:ecap@48304100 failed with
> error -22

Sent a patch to fix the ecap:
ARM: dts: am33xx-l4: Fix epwmssX/ecapX/ehrpwmX ranges and reg

Now LCD is working.

> 
> - Péter
> 
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> 

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki