Hi Tomi,

Looks like omap_dss_init() goes crazy on panda es when booted with 
PANEL_TAAL and DTB append enabled, see below. Does not seem to happen when
booted on blaze. Noticed this after enabling all the panels, my modified
omap2plus_defconfig attached.

Regards,

Tony

[    2.185089] Console: switching to colour frame buffer device 108x30
[    2.714660] omapdss DSI error: Failed to receive BTA
[    2.719879] omapdss DSI error: dsi_vc_write_common(ch 0, cmd 0x11, len 1) failed
[    2.719909] omapdss DSI error: DSI error, irqstatus 100090
[    2.733428] taal display0: error while enabling panel, issuing HW reset
[    2.754028] omapfb omapfb: Failed to enable display 'lcd'
[    2.759704] omapfb omapfb: failed to initialize default display
[    2.766082]
[    2.766082] ======================================================
[    2.766082] [ INFO: possible circular locking dependency detected ]
[    2.766082] 3.8.0-rc3-next-20130116-05470-ga21f555-dirty #76 Not tainted
[    2.766082] -------------------------------------------------------
[    2.766113] swapper/0/1 is trying to acquire lock:
[    2.766113]  (console_lock){+.+.+.}, at: [<c035d23c>] unbind_con_driver+0x48/0x1f4
[    2.766143]
[    2.766143] but task is already holding lock:
[    2.766143]  ((fb_notifier_list).rwsem){.+.+.+}, at: [<c006fe40>] __blocking_notifier_call_chain+0x30/0x64
[    2.766143]
[    2.766143] which lock already depends on the new lock.
[    2.766143]
[    2.766143]
[    2.766143] the existing dependency chain (in reverse order) is:
[    2.766174]
[    2.766174] -> #1 ((fb_notifier_list).rwsem){.+.+.+}:
[    2.766174]        [<c009988c>] validate_chain+0x6d8/0x790
[    2.766204]        [<c0099e2c>] __lock_acquire+0x4e8/0xac0
[    2.766204]        [<c009a4e0>] lock_acquire+0xdc/0xf4
[    2.766204]        [<c0552b28>] down_read+0x2c/0x3c
[    2.766235]        [<c006fe40>] __blocking_notifier_call_chain+0x30/0x64
[    2.766235]        [<c006fe8c>] blocking_notifier_call_chain+0x18/0x20
[    2.766265]        [<c02f9e28>] do_register_framebuffer+0x194/0x244
[    2.766265]        [<c02f9efc>] register_framebuffer+0x24/0x40
[    2.766296]        [<c0331b50>] omapfb_create_framebuffers+0x26c/0x4b4
[    2.766296]        [<c0796da8>] omapfb_probe+0x2b8/0x434
[    2.766326]        [<c03773c8>] platform_drv_probe+0x1c/0x24
[    2.766326]        [<c0375f84>] really_probe+0x70/0x204
[    2.766326]        [<c037614c>] driver_probe_device+0x34/0x50
[    2.766357]        [<c03761fc>] __driver_attach+0x94/0x98
[    2.766357]        [<c037479c>] bus_for_each_dev+0x60/0x8c
[    2.766357]        [<c0375068>] bus_add_driver+0x18c/0x254
[    2.766387]        [<c03767f4>] driver_register+0x5c/0x150
[    2.766387]        [<c0377788>] platform_driver_probe+0x1c/0xa4
[    2.766387]        [<c0796ab0>] omapfb_init+0x24/0x64
[    2.766418]        [<c00086a8>] do_one_initcall+0x2c/0x178
[    2.766418]        [<c076c2a4>] do_basic_setup+0x94/0xd0
[    2.766418]        [<c076c35c>] kernel_init_freeable+0x7c/0x124
[    2.766448]        [<c054ba54>] kernel_init+0xc/0x164
[    2.766479]        [<c0014210>] ret_from_fork+0x14/0x24
[    2.766479]
[    2.766479] -> #0 (console_lock){+.+.+.}:
[    2.766479] -> #0 (console_lock){+.+.+.}:
[    2.766479]        [<c0099168>] check_prev_add+0x66c/0x6b8
[    2.766510]        [<c009988c>] validate_chain+0x6d8/0x790
[    2.766510]        [<c0099e2c>] __lock_acquire+0x4e8/0xac0
[    2.766510]        [<c009a4e0>] lock_acquire+0xdc/0xf4
[    2.766540]        [<c0047d84>] console_lock+0x58/0x74
[    2.766540]        [<c035d23c>] unbind_con_driver+0x48/0x1f4
[    2.766540]        [<c0305f4c>] fbcon_event_notify+0x180/0x8fc
[    2.766571]        [<c0556a24>] notifier_call_chain+0x4c/0x8c
[    2.766571]        [<c006fe5c>] __blocking_notifier_call_chain+0x4c/0x64
[    2.766601]        [<c006fe8c>] blocking_notifier_call_chain+0x18/0x20
[    2.766601]        [<c02f9a3c>] do_unregister_framebuffer+0x54/0xdc
[    2.766601]        [<c02f9ae8>] unregister_framebuffer+0x24/0x40
[    2.766632]        [<c0330b04>] omapfb_free_resources+0x3c/0x1b4
[    2.766632]        [<c0796c30>] omapfb_probe+0x140/0x434
[    2.766662]        [<c03773c8>] platform_drv_probe+0x1c/0x24
[    2.766662]        [<c0375f84>] really_probe+0x70/0x204
[    2.766662]        [<c037614c>] driver_probe_device+0x34/0x50
[    2.766693]        [<c03761fc>] __driver_attach+0x94/0x98
[    2.766693]        [<c037479c>] bus_for_each_dev+0x60/0x8c
[    2.766693]        [<c0375068>] bus_add_driver+0x18c/0x254
[    2.766693]        [<c03767f4>] driver_register+0x5c/0x150
[    2.766723]        [<c0377788>] platform_driver_probe+0x1c/0xa4
[    2.766723]        [<c0796ab0>] omapfb_init+0x24/0x64
[    2.766754]        [<c00086a8>] do_one_initcall+0x2c/0x178
[    2.766754]        [<c076c2a4>] do_basic_setup+0x94/0xd0
[    2.766754]        [<c076c35c>] kernel_init_freeable+0x7c/0x124
[    2.766784]        [<c054ba54>] kernel_init+0xc/0x164
[    2.766784]        [<c0014210>] ret_from_fork+0x14/0x24
[    2.766784]
[    2.766784] other info that might help us debug this:
[    2.766784]
[    2.766784]  Possible unsafe locking scenario:
[    2.766784]
[    2.766784]        CPU0                    CPU1
[    2.766815]        ----                    ----
[    2.766815]   lock((fb_notifier_list).rwsem);
[    2.766815]                                lock(console_lock);
[    2.766815]                                lock((fb_notifier_list).rwsem);
[    2.766815]   lock(console_lock);
[    2.766845]
[    2.766845]  *** DEADLOCK ***
[    2.766845]
[    2.766845] 5 locks held by swapper/0/1:
[    2.766845]  #0:  (&__lockdep_no_validate__){......}, at: [<c03761b0>] __driver_attach+0x48/0x98
[    2.766876]  #1:  (&__lockdep_no_validate__){......}, at: [<c03761c0>] __driver_attach+0x58/0x98
[    2.766876]  #2:  (registration_lock){+.+.+.}, at: [<c02f9ae0>] unregister_framebuffer+0x1c/0x40
[    2.766906]  #3:  (&fb_info->lock){+.+.+.}, at: [<c02f90dc>] lock_fb_info+0x1c/0x44
[    2.766937]  #4:  ((fb_notifier_list).rwsem){.+.+.+}, at: [<c006fe40>] __blocking_notifier_call_chain+0x30/0x64
[    2.766937]
[    2.766937] stack backtrace:
[    2.766479] -> #0 (console_lock){+.+.+.}:
[    2.766479]        [<c0099168>] check_prev_add+0x66c/0x6b8
[    2.766510]        [<c009988c>] validate_chain+0x6d8/0x790
[    2.766510]        [<c0099e2c>] __lock_acquire+0x4e8/0xac0
[    2.766510]        [<c009a4e0>] lock_acquire+0xdc/0xf4
[    2.766540]        [<c0047d84>] console_lock+0x58/0x74
[    2.766540]        [<c035d23c>] unbind_con_driver+0x48/0x1f4
[    2.766540]        [<c0305f4c>] fbcon_event_notify+0x180/0x8fc
[    2.766571]        [<c0556a24>] notifier_call_chain+0x4c/0x8c
[    2.766571]        [<c006fe5c>] __blocking_notifier_call_chain+0x4c/0x64
[    2.766601]        [<c006fe8c>] blocking_notifier_call_chain+0x18/0x20
[    2.766601]        [<c02f9a3c>] do_unregister_framebuffer+0x54/0xdc
[    2.766601]        [<c02f9ae8>] unregister_framebuffer+0x24/0x40
[    2.766632]        [<c0330b04>] omapfb_free_resources+0x3c/0x1b4
[    2.766632]        [<c0796c30>] omapfb_probe+0x140/0x434
[    2.766662]        [<c03773c8>] platform_drv_probe+0x1c/0x24
[    2.766662]        [<c0375f84>] really_probe+0x70/0x204
[    2.766662]        [<c037614c>] driver_probe_device+0x34/0x50
[    2.766693]        [<c03761fc>] __driver_attach+0x94/0x98
[    2.766693]        [<c037479c>] bus_for_each_dev+0x60/0x8c
[    2.766693]        [<c0375068>] bus_add_driver+0x18c/0x254
[    2.766693]        [<c03767f4>] driver_register+0x5c/0x150
[    2.766723]        [<c0377788>] platform_driver_probe+0x1c/0xa4
[    2.766723]        [<c0796ab0>] omapfb_init+0x24/0x64
[    2.766754]        [<c00086a8>] do_one_initcall+0x2c/0x178
[    2.766754]        [<c076c2a4>] do_basic_setup+0x94/0xd0
[    2.766754]        [<c076c35c>] kernel_init_freeable+0x7c/0x124
[    2.766784]        [<c054ba54>] kernel_init+0xc/0x164
[    2.766784]        [<c0014210>] ret_from_fork+0x14/0x24
[    2.766784]
[    2.766784] other info that might help us debug this:
[    2.766784]
[    2.766784]  Possible unsafe locking scenario:
[    2.766784]
[    2.766784]        CPU0                    CPU1
[    2.766815]        ----                    ----
[    2.766815]   lock((fb_notifier_list).rwsem);
[    2.766815]                                lock(console_lock);
[    2.766815]                                lock((fb_notifier_list).rwsem);
[    2.766815]   lock(console_lock);
[    2.766845]
[    2.766845]  *** DEADLOCK ***
[    2.766845]
[    2.766845] 5 locks held by swapper/0/1:
[    2.766845]  #0:  (&__lockdep_no_validate__){......}, at: [<c03761b0>] __driver_attach+0x48/0x98
[    2.766876]  #1:  (&__lockdep_no_validate__){......}, at: [<c03761c0>] __driver_attach+0x58/0x98
[    2.766876]  #2:  (registration_lock){+.+.+.}, at: [<c02f9ae0>] unregister_framebuffer+0x1c/0x40
[    2.766906]  #3:  (&fb_info->lock){+.+.+.}, at: [<c02f90dc>] lock_fb_info+0x1c/0x44
[    2.766937]  #4:  ((fb_notifier_list).rwsem){.+.+.+}, at: [<c006fe40>] __blocking_notifier_call_chain+0x30/0x64
[    2.766937]
[    2.766937] stack backtrace:
[    2.766937] [<c001c164>] (unwind_backtrace+0x0/0xf4) from [<c0098ae8>] (print_circular_bug+0x11c/0x130)
[    2.766967] [<c0098ae8>] (print_circular_bug+0x11c/0x130) from [<c0099168>] (check_prev_add+0x66c/0x6b8)
[    2.766967] [<c0099168>] (check_prev_add+0x66c/0x6b8) from [<c009988c>] (validate_chain+0x6d8/0x790)
[    2.766998] [<c009988c>] (validate_chain+0x6d8/0x790) from [<c0099e2c>] (__lock_acquire+0x4e8/0xac0)
[    2.766998] [<c0099e2c>] (__lock_acquire+0x4e8/0xac0) from [<c009a4e0>] (lock_acquire+0xdc/0xf4)
[    2.766998] [<c009a4e0>] (lock_acquire+0xdc/0xf4) from [<c0047d84>] (console_lock+0x58/0x74)
[    2.767028] [<c0047d84>] (console_lock+0x58/0x74) from [<c035d23c>] (unbind_con_driver+0x48/0x1f4)
[    2.767028] [<c035d23c>] (unbind_con_driver+0x48/0x1f4) from [<c0305f4c>] (fbcon_event_notify+0x180/0x8fc)
[    2.767059] [<c0305f4c>] (fbcon_event_notify+0x180/0x8fc) from [<c0556a24>] (notifier_call_chain+0x4c/0x8c)
[    2.767059] [<c0556a24>] (notifier_call_chain+0x4c/0x8c) from [<c006fe5c>] (__blocking_notifier_call_chain+0x4c/0x64)
[    2.767089] [<c006fe5c>] (__blocking_notifier_call_chain+0x4c/0x64) from [<c006fe8c>] (blocking_notifier_call_chain+0x18/0x20)
[    2.767089] [<c006fe8c>] (blocking_notifier_call_chain+0x18/0x20) from [<c02f9a3c>] (do_unregister_framebuffer+0x54/0xdc)
[    2.767120] [<c02f9a3c>] (do_unregister_framebuffer+0x54/0xdc) from [<c02f9ae8>] (unregister_framebuffer+0x24/0x40)
[    2.767120] [<c02f9ae8>] (unregister_framebuffer+0x24/0x40) from [<c0330b04>] (omapfb_free_resources+0x3c/0x1b4)
[    2.767150] [<c0330b04>] (omapfb_free_resources+0x3c/0x1b4) from [<c0796c30>] (omapfb_probe+0x140/0x434)
[    2.767150] [<c0796c30>] (omapfb_probe+0x140/0x434) from [<c03773c8>] (platform_drv_probe+0x1c/0x24)
[    2.767181] [<c03773c8>] (platform_drv_probe+0x1c/0x24) from [<c0375f84>] (really_probe+0x70/0x204)
[    2.767181] [<c0375f84>] (really_probe+0x70/0x204) from [<c037614c>] (driver_probe_device+0x34/0x50)
[    2.767181] [<c037614c>] (driver_probe_device+0x34/0x50) from [<c03761fc>] (__driver_attach+0x94/0x98)
[    2.767211] [<c03761fc>] (__driver_attach+0x94/0x98) from [<c037479c>] (bus_for_each_dev+0x60/0x8c)
[    2.767211] [<c037479c>] (bus_for_each_dev+0x60/0x8c) from [<c0375068>] (bus_add_driver+0x18c/0x254)
[    2.767242] [<c0375068>] (bus_add_driver+0x18c/0x254) from [<c03767f4>] (driver_register+0x5c/0x150)
[    2.767242] [<c03767f4>] (driver_register+0x5c/0x150) from [<c0377788>] (platform_driver_probe+0x1c/0xa4)
[    2.767272] [<c0377788>] (platform_driver_probe+0x1c/0xa4) from [<c0796ab0>] (omapfb_init+0x24/0x64)
[    2.767272] [<c0796ab0>] (omapfb_init+0x24/0x64) from [<c00086a8>] (do_one_initcall+0x2c/0x178)
[    2.767272] [<c00086a8>] (do_one_initcall+0x2c/0x178) from [<c076c2a4>] (do_basic_setup+0x94/0xd0)
[    2.767303] [<c076c2a4>] (do_basic_setup+0x94/0xd0) from [<c076c35c>] (kernel_init_freeable+0x7c/0x124)
[    2.767303] [<c076c35c>] (kernel_init_freeable+0x7c/0x124) from [<c054ba54>] (kernel_init+0xc/0x164)
[    2.767333] [<c054ba54>] (kernel_init+0xc/0x164) from [<c0014210>] (ret_from_fork+0x14/0x24)
[    2.767395] Console: switching to colour dummy device 80x30
[    3.563140] omapfb omapfb: failed to setup omapfb
[    3.568115] omapfb: probe of omapfb failed with error -5
[    3.574157] failed to register omapfb driver
[    3.579071] VUSB: disabling
[    3.582550] VANA: disabling
[    3.585968] VDAC: disabling
...