[PATCH v4 0/7] Use DRM component API in tilcdc to connect to tda998x
Jyri Sarha
jsarha at ti.com
Fri May 8 04:17:07 PDT 2015
On 05/07/15 12:44, Tomi Valkeinen wrote:
>
> On 01/04/15 11:49, Jyri Sarha wrote:
>> Ok, let's do one more full review round. The mode filtering issue was
>> the main reason for this new patch series version. However, I found
>> couple other things to fix too after scrutinizing the patches once
>> more.
>>
>> Changes since v3 version of the patch-set:
>> * drm/tilcdc: Add support for external tda998x encoder
>> - Hijack external connectors helper functions
>> - Remove select of nonexistent DRM_TILCDC_INIT in tilcdc Kconfig
>> - Correct author mail address to tilcdc_exteral.h
>> * drm/tilcdc: Add DRM_TILCDC_SLAVE_COMPAT for ti,tilcdc,slave binding
>> - Add a header file for tilcdc_slave_compat.dtb symbol declarations
>>
>> Changes since v2 version of the patch-set:
>> - use obj-y in Makefle for tilcdc subdir in:
>> "drm/tilcdc: Force building of DRM_TILCDC_SLAVE_COMPAT"
>> - move to last:
>> "drm/tilcdc: Decrement refcount of ep-node from of_graph_get_next_endpoint"
>>
>> Changes since first version of the patch-set:
>> - Rename DRM_TILCDC_INIT to DRM_TILCDC_SLAVE_COMPAT and make it visible
>> - Add separate:
>> drm/tilcdc: Decrement refcount of ep-node from of_graph_get_next_endpoint
>> - Reduce info-level spam
>> - Use component_master_add_with_match()
>> - Be more explicit about tda998x being the only supported external encoder
>>
>> Remove tilcdc slave support and connect to tda998x trough its
>> component DRM API. For dtb backward compatibility the code creates at
>> boot time a DT overlay based on the earlier binding. The overlay
>> conforms to the new graph based binding.
>>
>> The "drm/tilcdc: Decrement refcount of ep-node from
>> of_graph_get_next_endpoint" should probably not be merged. The "of:
>> Decrement refcount of previous endpoint in of_graph_get_next_endpoint"
>> is eventually going to be merged and before that leaking of two
>> of-node refcount increments each time the module is loaded is not that
>> serious. The of-nodes live forever anyway.
>>
>> The merge of the dts patch can be delayed until the next merger
>> window, when the other patches are already in. The
>> DRM_TILCDC_SLAVE_COMPAT should keep the bbb HDMI operational until
>> then.
>
> I made a quick test on v4.1-rc2, and:
>
According to my tests the dump comes from having "drm/tilcdc: Decrement
refcount of ep-node from of_graph_get_next_endpoint" still in the patch set.
That should not be there anymore. I'll mail a new patch set shortly with
some additional fixes and comments.
Best regards,
Jyri
> [ 15.199584] [drm] Initialized drm 1.1.0 20060810
> [ 15.319496] BUG: sleeping function called from invalid context at
> kernel/locking/mutex.c:616
> [ 15.328339] in_atomic(): 1, irqs_disabled(): 128, pid: 130, name: insmod
> [ 15.335336] 3 locks held by insmod/130:
> [ 15.339339] #0: (&dev->mutex){......}, at: [<c044d8d0>]
> __driver_attach+0x50/0xa0
> [ 15.347389] #1: (&dev->mutex){......}, at: [<c044d8e0>]
> __driver_attach+0x60/0xa0
> [ 15.355420] #2: (devtree_lock){......}, at: [<c05e2888>]
> of_get_next_child+0x20/0x4c
> [ 15.363731] irq event stamp: 5750
> [ 15.367189] hardirqs last enabled at (5749): [<c0719f14>]
> _raw_spin_unlock_irqrestore+0x38/0x64
> [ 15.376377] hardirqs last disabled at (5750): [<c0719730>]
> _raw_spin_lock_irqsave+0x24/0x6c
> [ 15.385104] softirqs last enabled at (5200): [<c004b7c8>]
> __do_softirq+0x318/0x710
> [ 15.393111] softirqs last disabled at (5147): [<c004bf1c>]
> irq_exit+0xc4/0x138
> [ 15.400668] CPU: 0 PID: 130 Comm: insmod Not tainted
> 4.1.0-rc2-00007-g877542591d33-dirty #22
> [ 15.409477] Hardware name: Generic AM33XX (Flattened Device Tree)
> [ 15.415837] Backtrace:
> [ 15.418403] [<c00140a8>] (dump_backtrace) from [<c0014244>]
> (show_stack+0x18/0x1c)
> [ 15.426306] r6:c08d04b0 r5:dd652000 r4:00000000 r3:00000000
> [ 15.432257] [<c001422c>] (show_stack) from [<c0711b44>]
> (dump_stack+0x94/0xc8)
> [ 15.439810] [<c0711ab0>] (dump_stack) from [<c0070768>]
> (___might_sleep+0x18c/0x294)
> [ 15.447893] r5:00000268 r4:00000000
> [ 15.451643] [<c00705dc>] (___might_sleep) from [<c00708d4>]
> (__might_sleep+0x64/0xa4)
> [ 15.459816] r7:dd119280 r6:00000000 r5:00000268 r4:c08d04b0
> [ 15.465759] [<c0070870>] (__might_sleep) from [<c0715934>]
> (mutex_lock_nested+0x2c/0x430)
> [ 15.474295] r7:dd119280 r6:c0ae7c40 r5:c0203d0c r4:00000000
> [ 15.480239] [<c0715908>] (mutex_lock_nested) from [<c0203d0c>]
> (kernfs_remove+0x20/0x38)
> [ 15.488684] r10:bf111da0 r9:bf111dd0 r8:dfa3a044 r7:dd119280
> r6:c0ae7c40 r5:dd11a510
> [ 15.496897] r4:c0a7a7e8
> [ 15.499552] [<c0203cec>] (kernfs_remove) from [<c0205ed0>]
> (sysfs_remove_dir+0x4c/0x84)
> [ 15.507907] r5:dfa3a044 r4:dd11a510
> [ 15.511658] [<c0205e84>] (sysfs_remove_dir) from [<c03b0514>]
> (kobject_del+0x1c/0x4c)
> [ 15.519831] r5:dd11a510 r4:dfa3a044
> [ 15.523580] [<c03b04f8>] (kobject_del) from [<c03b05b4>]
> (kobject_release+0x70/0x1b8)
> [ 15.531753] r5:c0ac320c r4:dfa3a060
> [ 15.535502] [<c03b0544>] (kobject_release) from [<c03b0754>]
> (kobject_put+0x58/0x88)
> [ 15.543585] r8:dd653cac r7:dfa3a018 r6:a00c0013 r5:dfa3a018 r4:dfa3a044
> [ 15.550627] [<c03b06fc>] (kobject_put) from [<c05e5d00>]
> (of_node_put+0x1c/0x20)
> [ 15.558347] r4:00000000
> [ 15.561000] [<c05e5ce4>] (of_node_put) from [<c05e2850>]
> (__of_get_next_child+0x50/0x68)
> [ 15.569451] [<c05e2800>] (__of_get_next_child) from [<c05e2898>]
> (of_get_next_child+0x30/0x4c)
> [ 15.578440] r5:dfa39f60 r4:c0ac31ec
> [ 15.582190] [<c05e2868>] (of_get_next_child) from [<c05e2abc>]
> (of_graph_get_next_endpoint+0x54/0x138)
> [ 15.591905] r7:dd158c10 r6:dfa39d2c r5:dfa3a018 r4:dfa39f60
> [ 15.597877] [<c05e2a68>] (of_graph_get_next_endpoint) from
> [<bf10f63c>] (tilcdc_get_external_components+0x7c/0xe8 [tilcdc])
> [ 15.609497] r7:dd158c10 r6:00000001 r5:dfa3a018 r4:dfa3270c
> [ 15.615459] [<bf10f5c0>] (tilcdc_get_external_components [tilcdc])
> from [<bf11047c>] (tilcdc_pdev_probe+0x38/0x8c [tilcdc])
> [ 15.627078] r10:0000000a r8:bf111bd0 r7:bf111bd0 r6:fffffdfb
> r5:dd158c10 r4:dd158c00
> [ 15.635309] [<bf110444>] (tilcdc_pdev_probe [tilcdc]) from
> [<c044f6cc>] (platform_drv_probe+0x50/0xac)
> [ 15.645024] r5:dd158c10 r4:ffffffed
> [ 15.648773] [<c044f67c>] (platform_drv_probe) from [<c044d644>]
> (driver_probe_device+0x1ac/0x3e8)
> [ 15.658035] r7:00000000 r6:c0ae8dc8 r5:dd158c10 r4:c12e735c
> [ 15.663976] [<c044d498>] (driver_probe_device) from [<c044d91c>]
> (__driver_attach+0x9c/0xa0)
> [ 15.672784] r10:00000000 r8:bf115048 r7:00000000 r6:dd158c44
> r5:bf111bd0 r4:dd158c10
> [ 15.681012] [<c044d880>] (__driver_attach) from [<c044b964>]
> (bus_for_each_dev+0x5c/0x90)
> [ 15.689548] r6:c044d880 r5:bf111bd0 r4:00000000 r3:dd13909c
> [ 15.695493] [<c044b908>] (bus_for_each_dev) from [<c044cfc4>]
> (driver_attach+0x20/0x28)
> [ 15.703848] r6:c0aa9368 r5:dd5bebc0 r4:bf111bd0
> [ 15.708695] [<c044cfa4>] (driver_attach) from [<c044cb98>]
> (bus_add_driver+0xf0/0x210)
> [ 15.716965] [<c044caa8>] (bus_add_driver) from [<c044e7e8>]
> (driver_register+0x80/0xfc)
> [ 15.725319] r7:00000001 r6:dd79d6c0 r5:c0a29bd8 r4:bf111bd0
> [ 15.731261] [<c044e768>] (driver_register) from [<c044f554>]
> (__platform_driver_register+0x50/0x64)
> [ 15.740703] r5:c0a29bd8 r4:c0a29bd8
> [ 15.744462] [<c044f504>] (__platform_driver_register) from
> [<bf115084>] (tilcdc_drm_init+0x3c/0x54 [tilcdc])
> [ 15.754738] [<bf115048>] (tilcdc_drm_init [tilcdc]) from [<c0009828>]
> (do_one_initcall+0xb4/0x1f8)
> [ 15.764096] [<c0009774>] (do_one_initcall) from [<c070fad8>]
> (do_init_module+0x64/0x1b4)
> [ 15.772542] r10:bf111e18 r9:bf111dd0 r8:00000124 r7:00000001
> r6:dd79d640 r5:c0ae03a8
> [ 15.780754] r4:bf111dd0
> [ 15.783414] [<c070fa74>] (do_init_module) from [<c00dcfbc>]
> (load_module+0x19a8/0x22e8)
> [ 15.791768] r6:dd5bfd40 r5:c0ae03a8 r4:c0adf52e
> [ 15.796614] [<c00db614>] (load_module) from [<c00dda04>]
> (SyS_init_module+0x108/0x18c)
> [ 15.804878] r10:00000000 r9:dd652000 r8:000a3008 r7:e0b9547a
> r6:00000000 r5:000af492
> [ 15.813091] r4:0000c47a
> [ 15.815750] [<c00dd8fc>] (SyS_init_module) from [<c0010580>]
> (ret_fast_syscall+0x0/0x4c)
> [ 15.824195] r8:c0010744 r7:00000080 r6:000001fa r5:bee24e8f r4:0000c47a
> [ 15.831943] ERROR: Bad of_node_put() on
> /ocp/lcdc at 4830e000/port/endpoint at 0
> [ 15.839139] CPU: 0 PID: 130 Comm: insmod Not tainted
> 4.1.0-rc2-00007-g877542591d33-dirty #22
> [ 15.847948] Hardware name: Generic AM33XX (Flattened Device Tree)
> [ 15.854308] Backtrace:
> [ 15.856878] [<c00140a8>] (dump_backtrace) from [<c0014244>]
> (show_stack+0x18/0x1c)
> [ 15.864780] r6:dfa3a044 r5:dd652000 r4:00000000 r3:00000000
> [ 15.870726] [<c001422c>] (show_stack) from [<c0711b44>]
> (dump_stack+0x94/0xc8)
> [ 15.878276] [<c0711ab0>] (dump_stack) from [<c05e647c>]
> (of_node_release+0x94/0x9c)
> [ 15.886268] r5:c0ac320c r4:dfa3a094
> [ 15.890019] [<c05e63e8>] (of_node_release) from [<c03b05dc>]
> (kobject_release+0x98/0x1b8)
> [ 15.898554] r6:c0ae7c40 r5:c0ac320c r4:dfa3a060 r3:c05e63e8
> [ 15.904496] [<c03b0544>] (kobject_release) from [<c03b0754>]
> (kobject_put+0x58/0x88)
> [ 15.912578] r8:dd653cac r7:dfa3a018 r6:a00c0013 r5:dfa3a018 r4:dfa3a044
> [ 15.919616] [<c03b06fc>] (kobject_put) from [<c05e5d00>]
> (of_node_put+0x1c/0x20)
> [ 15.927335] r4:00000000
> [ 15.929990] [<c05e5ce4>] (of_node_put) from [<c05e2850>]
> (__of_get_next_child+0x50/0x68)
> [ 15.938440] [<c05e2800>] (__of_get_next_child) from [<c05e2898>]
> (of_get_next_child+0x30/0x4c)
> [ 15.947429] r5:dfa39f60 r4:c0ac31ec
> [ 15.951179] [<c05e2868>] (of_get_next_child) from [<c05e2abc>]
> (of_graph_get_next_endpoint+0x54/0x138)
> [ 15.960894] r7:dd158c10 r6:dfa39d2c r5:dfa3a018 r4:dfa39f60
> [ 15.966859] [<c05e2a68>] (of_graph_get_next_endpoint) from
> [<bf10f63c>] (tilcdc_get_external_components+0x7c/0xe8 [tilcdc])
> [ 15.978479] r7:dd158c10 r6:00000001 r5:dfa3a018 r4:dfa3270c
> [ 15.984439] [<bf10f5c0>] (tilcdc_get_external_components [tilcdc])
> from [<bf11047c>] (tilcdc_pdev_probe+0x38/0x8c [tilcdc])
> [ 15.996058] r10:0000000a r8:bf111bd0 r7:bf111bd0 r6:fffffdfb
> r5:dd158c10 r4:dd158c00
> [ 16.004290] [<bf110444>] (tilcdc_pdev_probe [tilcdc]) from
> [<c044f6cc>] (platform_drv_probe+0x50/0xac)
> [ 16.014005] r5:dd158c10 r4:ffffffed
> [ 16.017755] [<c044f67c>] (platform_drv_probe) from [<c044d644>]
> (driver_probe_device+0x1ac/0x3e8)
> [ 16.027016] r7:00000000 r6:c0ae8dc8 r5:dd158c10 r4:c12e735c
> [ 16.032957] [<c044d498>] (driver_probe_device) from [<c044d91c>]
> (__driver_attach+0x9c/0xa0)
> [ 16.041764] r10:00000000 r8:bf115048 r7:00000000 r6:dd158c44
> r5:bf111bd0 r4:dd158c10
> [ 16.049987] [<c044d880>] (__driver_attach) from [<c044b964>]
> (bus_for_each_dev+0x5c/0x90)
> [ 16.058524] r6:c044d880 r5:bf111bd0 r4:00000000 r3:dd13909c
> [ 16.064467] [<c044b908>] (bus_for_each_dev) from [<c044cfc4>]
> (driver_attach+0x20/0x28)
> [ 16.072822] r6:c0aa9368 r5:dd5bebc0 r4:bf111bd0
> [ 16.077670] [<c044cfa4>] (driver_attach) from [<c044cb98>]
> (bus_add_driver+0xf0/0x210)
> [ 16.085939] [<c044caa8>] (bus_add_driver) from [<c044e7e8>]
> (driver_register+0x80/0xfc)
> [ 16.094294] r7:00000001 r6:dd79d6c0 r5:c0a29bd8 r4:bf111bd0
> [ 16.100235] [<c044e768>] (driver_register) from [<c044f554>]
> (__platform_driver_register+0x50/0x64)
> [ 16.109678] r5:c0a29bd8 r4:c0a29bd8
> [ 16.113437] [<c044f504>] (__platform_driver_register) from
> [<bf115084>] (tilcdc_drm_init+0x3c/0x54 [tilcdc])
> [ 16.123710] [<bf115048>] (tilcdc_drm_init [tilcdc]) from [<c0009828>]
> (do_one_initcall+0xb4/0x1f8)
> [ 16.133068] [<c0009774>] (do_one_initcall) from [<c070fad8>]
> (do_init_module+0x64/0x1b4)
> [ 16.141513] r10:bf111e18 r9:bf111dd0 r8:00000124 r7:00000001
> r6:dd79d640 r5:c0ae03a8
> [ 16.149726] r4:bf111dd0
> [ 16.152382] [<c070fa74>] (do_init_module) from [<c00dcfbc>]
> (load_module+0x19a8/0x22e8)
> [ 16.160737] r6:dd5bfd40 r5:c0ae03a8 r4:c0adf52e
> [ 16.165582] [<c00db614>] (load_module) from [<c00dda04>]
> (SyS_init_module+0x108/0x18c)
> [ 16.173846] r10:00000000 r9:dd652000 r8:000a3008 r7:e0b9547a
> r6:00000000 r5:000af492
> [ 16.182059] r4:0000c47a
> [ 16.184715] [<c00dd8fc>] (SyS_init_module) from [<c0010580>]
> (ret_fast_syscall+0x0/0x4c)
> [ 16.193161] r8:c0010744 r7:00000080 r6:000001fa r5:bee24e8f r4:0000c47a
> [ 16.239460] ------------[ cut here ]------------
> [ 16.244338] WARNING: CPU: 0 PID: 130 at include/linux/kref.h:47
> kobject_get+0x98/0xb8()
> [ 16.252705] Modules linked in: tilcdc(+) tda998x drm_kms_helper drm
> [ 16.259309] CPU: 0 PID: 130 Comm: insmod Not tainted
> 4.1.0-rc2-00007-g877542591d33-dirty #22
> [ 16.268129] Hardware name: Generic AM33XX (Flattened Device Tree)
> [ 16.274498] Backtrace:
> [ 16.277070] [<c00140a8>] (dump_backtrace) from [<c0014244>]
> (show_stack+0x18/0x1c)
> [ 16.284972] r6:0000002f r5:dd652000 r4:00000000 r3:00000000
> [ 16.290926] [<c001422c>] (show_stack) from [<c0711b44>]
> (dump_stack+0x94/0xc8)
> [ 16.298474] [<c0711ab0>] (dump_stack) from [<c0046a54>]
> (warn_slowpath_common+0x84/0xc0)
> [ 16.306919] r5:c03b0a34 r4:00000000
> [ 16.310668] [<c00469d0>] (warn_slowpath_common) from [<c0046ab4>]
> (warn_slowpath_null+0x24/0x2c)
> [ 16.319839] r8:00000000 r7:00000000 r6:a0010013 r5:c0adfa5d r4:dfa3a044
> [ 16.326876] [<c0046a90>] (warn_slowpath_null) from [<c03b0a34>]
> (kobject_get+0x98/0xb8)
> [ 16.335245] [<c03b099c>] (kobject_get) from [<c05e5d20>]
> (of_node_get+0x1c/0x24)
> [ 16.342964] r5:00000000 r4:dfa3a018
> [ 16.346715] [<c05e5d04>] (of_node_get) from [<c05e2830>]
> (__of_get_next_child+0x30/0x68)
> [ 16.355160] r4:dfa3a018 r3:dd5b8640
> [ 16.358909] [<c05e2800>] (__of_get_next_child) from [<c05e2898>]
> (of_get_next_child+0x30/0x4c)
> [ 16.367898] r5:dfa39f60 r4:c0ac31ec
> [ 16.371648] [<c05e2868>] (of_get_next_child) from [<c05e2abc>]
> (of_graph_get_next_endpoint+0x54/0x138)
> [ 16.381363] r7:00000000 r6:dfa39d2c r5:00000000 r4:dfa39f60
> [ 16.387343] [<c05e2a68>] (of_graph_get_next_endpoint) from
> [<bf10f63c>] (tilcdc_get_external_components+0x7c/0xe8 [tilcdc])
> [ 16.398963] r7:dd158c10 r6:00000000 r5:00000000 r4:dd507000
> [ 16.404925] [<bf10f5c0>] (tilcdc_get_external_components [tilcdc])
> from [<bf10fd84>] (tilcdc_load+0x50/0x648 [tilcdc])
> [ 16.416091] r10:0000000a r8:dd158c00 r7:00000000 r6:dfa39d2c
> r5:dd677f00 r4:dd507000
> [ 16.424542] [<bf10fd34>] (tilcdc_load [tilcdc]) from [<bf074060>]
> (drm_dev_register+0xac/0x10c [drm])
> [ 16.434171] r10:0000000a r9:bf111dd0 r8:00000000 r7:dd119290
> r6:00000000 r5:00000000
> [ 16.442384] r4:dd507000
> [ 16.445187] [<bf073fb4>] (drm_dev_register [drm]) from [<bf075b4c>]
> (drm_platform_init+0x48/0xd8 [drm])
> [ 16.454993] r6:bf111a8c r5:dd507000 r4:dd158c00 r3:00000000
> [ 16.461011] [<bf075b04>] (drm_platform_init [drm]) from [<bf10fa3c>]
> (tilcdc_bind+0x18/0x20 [tilcdc])
> [ 16.470636] r6:dd119240 r5:00000001 r4:dd119298
> [ 16.475499] [<bf10fa24>] (tilcdc_bind [tilcdc]) from [<c0448af4>]
> (try_to_bring_up_master.part.1+0xd0/0x10c)
> [ 16.485766] [<c0448a24>] (try_to_bring_up_master.part.1) from
> [<c0448bdc>] (component_master_add_with_match+0xac/0x110)
> [ 16.497022] r8:dd158c10 r7:c0aa9040 r6:bf1109c0 r5:00000000
> r4:dd119240 r3:c0aa9084
> [ 16.505160] [<c0448b30>] (component_master_add_with_match) from
> [<bf110498>] (tilcdc_pdev_probe+0x54/0x8c [tilcdc])
> [ 16.516054] r8:bf111bd0 r7:bf111bd0 r6:fffffdfb r5:dd158c10
> r4:dd158c00 r3:dd652000
> [ 16.524195] [<bf110444>] (tilcdc_pdev_probe [tilcdc]) from
> [<c044f6cc>] (platform_drv_probe+0x50/0xac)
> [ 16.533910] r5:dd158c10 r4:ffffffed
> [ 16.537659] [<c044f67c>] (platform_drv_probe) from [<c044d644>]
> (driver_probe_device+0x1ac/0x3e8)
> [ 16.546921] r7:00000000 r6:c0ae8dc8 r5:dd158c10 r4:c12e735c
> [ 16.552862] [<c044d498>] (driver_probe_device) from [<c044d91c>]
> (__driver_attach+0x9c/0xa0)
> [ 16.561670] r10:00000000 r8:bf115048 r7:00000000 r6:dd158c44
> r5:bf111bd0 r4:dd158c10
> [ 16.569893] [<c044d880>] (__driver_attach) from [<c044b964>]
> (bus_for_each_dev+0x5c/0x90)
> [ 16.578428] r6:c044d880 r5:bf111bd0 r4:00000000 r3:dd13909c
> [ 16.584374] [<c044b908>] (bus_for_each_dev) from [<c044cfc4>]
> (driver_attach+0x20/0x28)
> [ 16.592728] r6:c0aa9368 r5:dd5bebc0 r4:bf111bd0
> [ 16.597575] [<c044cfa4>] (driver_attach) from [<c044cb98>]
> (bus_add_driver+0xf0/0x210)
> [ 16.605845] [<c044caa8>] (bus_add_driver) from [<c044e7e8>]
> (driver_register+0x80/0xfc)
> [ 16.614199] r7:00000001 r6:dd79d6c0 r5:c0a29bd8 r4:bf111bd0
> [ 16.620141] [<c044e768>] (driver_register) from [<c044f554>]
> (__platform_driver_register+0x50/0x64)
> [ 16.629584] r5:c0a29bd8 r4:c0a29bd8
> [ 16.633343] [<c044f504>] (__platform_driver_register) from
> [<bf115084>] (tilcdc_drm_init+0x3c/0x54 [tilcdc])
> [ 16.643618] [<bf115048>] (tilcdc_drm_init [tilcdc]) from [<c0009828>]
> (do_one_initcall+0xb4/0x1f8)
> [ 16.652978] [<c0009774>] (do_one_initcall) from [<c070fad8>]
> (do_init_module+0x64/0x1b4)
> [ 16.661424] r10:bf111e18 r9:bf111dd0 r8:00000124 r7:00000001
> r6:dd79d640 r5:c0ae03a8
> [ 16.669636] r4:bf111dd0
> [ 16.672295] [<c070fa74>] (do_init_module) from [<c00dcfbc>]
> (load_module+0x19a8/0x22e8)
> [ 16.680650] r6:dd5bfd40 r5:c0ae03a8 r4:c0adf52e
> [ 16.685496] [<c00db614>] (load_module) from [<c00dda04>]
> (SyS_init_module+0x108/0x18c)
> [ 16.693760] r10:00000000 r9:dd652000 r8:000a3008 r7:e0b9547a
> r6:00000000 r5:000af492
> [ 16.701973] r4:0000c47a
> [ 16.704631] [<c00dd8fc>] (SyS_init_module) from [<c0010580>]
> (ret_fast_syscall+0x0/0x4c)
> [ 16.713077] r8:c0010744 r7:00000080 r6:000001fa r5:bee24e8f r4:0000c47a
> [ 16.720111] ---[ end trace 74558956458632df ]---
> [ 16.726493] ERROR: Bad of_node_put() on
> /ocp/lcdc at 4830e000/port/endpoint at 0
> [ 16.733799] CPU: 0 PID: 130 Comm: insmod Tainted: G W
> 4.1.0-rc2-00007-g877542591d33-dirty #22
> [ 16.743914] Hardware name: Generic AM33XX (Flattened Device Tree)
> [ 16.750305] Backtrace:
> [ 16.752884] [<c00140a8>] (dump_backtrace) from [<c0014244>]
> (show_stack+0x18/0x1c)
> [ 16.760815] r6:dfa3a044 r5:dd652000 r4:00000000 r3:00000000
> [ 16.766771] [<c001422c>] (show_stack) from [<c0711b44>]
> (dump_stack+0x94/0xc8)
> [ 16.774354] [<c0711ab0>] (dump_stack) from [<c05e647c>]
> (of_node_release+0x94/0x9c)
> [ 16.782376] r5:c0ac320c r4:dfa3a094
> [ 16.786130] [<c05e63e8>] (of_node_release) from [<c03b05dc>]
> (kobject_release+0x98/0x1b8)
> [ 16.794693] r6:c0ae7c40 r5:c0ac320c r4:dfa3a060 r3:c05e63e8
> [ 16.800666] [<c03b0544>] (kobject_release) from [<c03b0754>]
> (kobject_put+0x58/0x88)
> [ 16.808775] r8:00000000 r7:dd158c10 r6:00000000 r5:dfa3a018 r4:dfa3a044
> [ 16.815818] [<c03b06fc>] (kobject_put) from [<c05e5d00>]
> (of_node_put+0x1c/0x20)
> [ 16.823564] r4:dfa3270c
> [ 16.826251] [<c05e5ce4>] (of_node_put) from [<bf10f5f4>]
> (tilcdc_get_external_components+0x34/0xe8 [tilcdc])
> [ 16.836568] [<bf10f5c0>] (tilcdc_get_external_components [tilcdc])
> from [<bf10fd84>] (tilcdc_load+0x50/0x648 [tilcdc])
> [ 16.847762] r10:0000000a r8:dd158c00 r7:00000000 r6:dfa39d2c
> r5:dd677f00 r4:dd507000
> [ 16.856196] [<bf10fd34>] (tilcdc_load [tilcdc]) from [<bf074060>]
> (drm_dev_register+0xac/0x10c [drm])
> [ 16.865870] r10:0000000a r9:bf111dd0 r8:00000000 r7:dd119290
> r6:00000000 r5:00000000
> [ 16.874117] r4:dd507000
> [ 16.876911] [<bf073fb4>] (drm_dev_register [drm]) from [<bf075b4c>]
> (drm_platform_init+0x48/0xd8 [drm])
> [ 16.886757] r6:bf111a8c r5:dd507000 r4:dd158c00 r3:00000000
> [ 16.892812] [<bf075b04>] (drm_platform_init [drm]) from [<bf10fa3c>]
> (tilcdc_bind+0x18/0x20 [tilcdc])
> [ 16.902468] r6:dd119240 r5:00000001 r4:dd119298
> [ 16.907338] [<bf10fa24>] (tilcdc_bind [tilcdc]) from [<c0448af4>]
> (try_to_bring_up_master.part.1+0xd0/0x10c)
> [ 16.917636] [<c0448a24>] (try_to_bring_up_master.part.1) from
> [<c0448bdc>] (component_master_add_with_match+0xac/0x110)
> [ 16.928922] r8:dd158c10 r7:c0aa9040 r6:bf1109c0 r5:00000000
> r4:dd119240 r3:c0aa9084
> [ 16.937067] [<c0448b30>] (component_master_add_with_match) from
> [<bf110498>] (tilcdc_pdev_probe+0x54/0x8c [tilcdc])
> [ 16.947988] r8:bf111bd0 r7:bf111bd0 r6:fffffdfb r5:dd158c10
> r4:dd158c00 r3:dd652000
> [ 16.956161] [<bf110444>] (tilcdc_pdev_probe [tilcdc]) from
> [<c044f6cc>] (platform_drv_probe+0x50/0xac)
> [ 16.965902] r5:dd158c10 r4:ffffffed
> [ 16.969680] [<c044f67c>] (platform_drv_probe) from [<c044d644>]
> (driver_probe_device+0x1ac/0x3e8)
> [ 16.978967] r7:00000000 r6:c0ae8dc8 r5:dd158c10 r4:c12e735c
> [ 16.984913] [<c044d498>] (driver_probe_device) from [<c044d91c>]
> (__driver_attach+0x9c/0xa0)
> [ 16.993746] r10:00000000 r8:bf115048 r7:00000000 r6:dd158c44
> r5:bf111bd0 r4:dd158c10
> [ 17.002001] [<c044d880>] (__driver_attach) from [<c044b964>]
> (bus_for_each_dev+0x5c/0x90)
> [ 17.010575] r6:c044d880 r5:bf111bd0 r4:00000000 r3:dd13909c
> [ 17.016525] [<c044b908>] (bus_for_each_dev) from [<c044cfc4>]
> (driver_attach+0x20/0x28)
> [ 17.024908] r6:c0aa9368 r5:dd5bebc0 r4:bf111bd0
> [ 17.029786] [<c044cfa4>] (driver_attach) from [<c044cb98>]
> (bus_add_driver+0xf0/0x210)
> [ 17.038057] [<c044caa8>] (bus_add_driver) from [<c044e7e8>]
> (driver_register+0x80/0xfc)
> [ 17.046437] r7:00000001 r6:dd79d6c0 r5:c0a29bd8 r4:bf111bd0
> [ 17.052424] [<c044e768>] (driver_register) from [<c044f554>]
> (__platform_driver_register+0x50/0x64)
> [ 17.061894] r5:c0a29bd8 r4:c0a29bd8
> [ 17.065660] [<c044f504>] (__platform_driver_register) from
> [<bf115084>] (tilcdc_drm_init+0x3c/0x54 [tilcdc])
> [ 17.075964] [<bf115048>] (tilcdc_drm_init [tilcdc]) from [<c0009828>]
> (do_one_initcall+0xb4/0x1f8)
> [ 17.085355] [<c0009774>] (do_one_initcall) from [<c070fad8>]
> (do_init_module+0x64/0x1b4)
> [ 17.093829] r10:bf111e18 r9:bf111dd0 r8:00000124 r7:00000001
> r6:dd79d640 r5:c0ae03a8
> [ 17.102074] r4:bf111dd0
> [ 17.104733] [<c070fa74>] (do_init_module) from [<c00dcfbc>]
> (load_module+0x19a8/0x22e8)
> [ 17.113115] r6:dd5bfd40 r5:c0ae03a8 r4:c0adf52e
> [ 17.117965] [<c00db614>] (load_module) from [<c00dda04>]
> (SyS_init_module+0x108/0x18c)
> [ 17.126256] r10:00000000 r9:dd652000 r8:000a3008 r7:e0b9547a
> r6:00000000 r5:000af492
> [ 17.134498] r4:0000c47a
> [ 17.137158] [<c00dd8fc>] (SyS_init_module) from [<c0010580>]
> (ret_fast_syscall+0x0/0x4c)
> [ 17.145629] r8:c0010744 r7:00000080 r6:000001fa r5:bee24e8f r4:0000c47a
> [ 17.155286] tda998x 0-0070: Falling back to first CRTC
> [ 17.323479] tda998x 0-0070: found TDA19988
> [ 17.331525] tilcdc 4830e000.lcdc: bound 0-0070 (ops tda998x_ops
> [tda998x])
> [ 17.338858] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [ 17.345777] [drm] No driver support for vblank timestamp query.
> [ 17.443556] tilcdc 4830e000.lcdc: fb0: frame buffer device
> [ 17.449541] tilcdc 4830e000.lcdc: registered panic notifier
> [ 17.455462] [drm] Initialized tilcdc 1.0.0 20121205 on minor 0
> #
>
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