Hi there,
Error handling seems to be broken when allocating a framebuffer fails (see below). Observed on a Apalis TK1 (Tegra K1 with 2GB RAM, seems to allocate 240 MB for vmalloc) using Linux 4.15.0-rc7 connected to a 4K TV:
[ 5.632659] [drm:drm_setup_crtcs] [ 5.636227] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:46:HDMI-A-1] [ 5.643811] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:46:HDMI-A-1] status updated from unknown to connected [ 5.655003] [drm:drm_sysfs_hotplug_event] generating hotplug event [ 5.919028] [drm:drm_add_display_info] non_desktop set to 0 [ 5.924664] [drm:drm_add_display_info] HDMI: DVI dual 0, max TMDS clock 300000 kHz [ 5.932232] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does deep color 30. [ 5.939483] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does deep color 36. [ 5.946736] [drm:drm_add_display_info] HDMI-A-1: Assigning HDMI sink color depth as 12 bpc. [ 5.955114] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does YCRCB444 in deep color. [ 5.963147] [drm:drm_add_display_info] HF-VSDB: max TMDS clock 600000 kHz [ 5.969954] [drm:drm_add_display_info] non_desktop set to 0 [ 5.975561] [drm:drm_add_display_info] HDMI: DVI dual 0, max TMDS clock 300000 kHz [ 5.983158] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does deep color 30. [ 5.990376] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does deep color 36. [ 5.997626] [drm:drm_add_display_info] HDMI-A-1: Assigning HDMI sink color depth as 12 bpc. [ 6.006003] [drm:drm_add_display_info] HDMI-A-1: HDMI sink does YCRCB444 in deep color. [ 6.014035] [drm:drm_add_display_info] HF-VSDB: max TMDS clock 600000 kHz [ 6.021749] [drm:drm_edid_to_eld] ELD monitor LG TV [ 6.026668] [drm:drm_edid_to_eld] HDMI: latency present 0 0, video latency 0 1, audio latency 128 2 [ 6.035740] [drm:drm_edid_to_eld] ELD size 40, SAD count 4 [ 6.041893] [drm:drm_mode_debug_printmodeline] Modeline 49:"3840x2160" 60 594000 3840 4016 4104 4400 2160 2168 2178 2250 0x48 0x5 [ 6.053568] [drm:drm_mode_prune_invalid] Not using 3840x2160 mode: NOCLOCK [ 6.060454] [drm:drm_mode_debug_printmodeline] Modeline 62:"3840x2160" 0 594000 3840 4896 4984 5280 2160 2168 2178 2250 0x40 0x5 [ 6.072038] [drm:drm_mode_prune_invalid] Not using 3840x2160 mode: NOCLOCK [ 6.078955] [drm:drm_mode_debug_printmodeline] Modeline 65:"4096x2160" 0 594000 4096 4184 4272 4400 2160 2168 2178 2250 0x40 0x5 [ 6.090687] [drm:drm_mode_prune_invalid] Not using 4096x2160 mode: NOCLOCK [ 6.097607] [drm:drm_mode_debug_printmodeline] Modeline 66:"4096x2160" 0 594000 4096 5064 5152 5280 2160 2168 2178 2250 0x40 0x5 [ 6.109192] [drm:drm_mode_prune_invalid] Not using 4096x2160 mode: NOCLOCK [ 6.116108] [drm:drm_mode_debug_printmodeline] Modeline 69:"1920x1080i" 0 74250 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15 [ 6.127780] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode: NO_INTERLACE [ 6.135216] [drm:drm_mode_debug_printmodeline] Modeline 70:"1920x1080i" 0 74250 1920 2448 2492 2640 1080 1084 1094 1125 0x40 0x15 [ 6.146887] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode: NO_INTERLACE [ 6.154323] [drm:drm_mode_debug_printmodeline] Modeline 77:"720x576i" 0 13500 720 732 795 864 576 580 586 625 0x40 0x101a [ 6.165301] [drm:drm_mode_prune_invalid] Not using 720x576i mode: NO_INTERLACE [ 6.172534] [drm:drm_mode_debug_printmodeline] Modeline 91:"3840x2160" 60 593407 3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5 [ 6.184205] [drm:drm_mode_prune_invalid] Not using 3840x2160 mode: NOCLOCK [ 6.191089] [drm:drm_mode_debug_printmodeline] Modeline 97:"4096x2160" 60 593407 4096 4184 4272 4400 2160 2168 2178 2250 0x40 0x5 [ 6.202761] [drm:drm_mode_prune_invalid] Not using 4096x2160 mode: NOCLOCK [ 6.209676] [drm:drm_mode_debug_printmodeline] Modeline 99:"1920x1080i" 60 74176 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15 [ 6.221433] [drm:drm_mode_prune_invalid] Not using 1920x1080i mode: NO_INTERLACE [ 6.228882] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:46:HDMI-A-1] probed modes : [ 6.237701] [drm:drm_mode_debug_printmodeline] Modeline 84:"4096x2160" 30 297000 4096 4184 4272 4400 2160 2168 2178 2250 0x40 0x5 [ 6.249379] [drm:drm_mode_debug_printmodeline] Modeline 108:"4096x2160" 30 296703 4096 4184 4272 4400 2160 2168 2178 2250 0x40 0x5 [ 6.261143] [drm:drm_mode_debug_printmodeline] Modeline 83:"4096x2160" 25 297000 4096 5064 5152 5280 2160 2168 2178 2250 0x40 0x5 [ 6.272822] [drm:drm_mode_debug_printmodeline] Modeline 82:"4096x2160" 24 297000 4096 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 [ 6.284500] [drm:drm_mode_debug_printmodeline] Modeline 107:"4096x2160" 24 296703 4096 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 [ 6.296265] [drm:drm_mode_debug_printmodeline] Modeline 81:"3840x2160" 30 297000 3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5 [ 6.307944] [drm:drm_mode_debug_printmodeline] Modeline 106:"3840x2160" 30 296703 3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5 [ 6.319708] [drm:drm_mode_debug_printmodeline] Modeline 80:"3840x2160" 25 297000 3840 4896 4984 5280 2160 2168 2178 2250 0x40 0x5 [ 6.331385] [drm:drm_mode_debug_printmodeline] Modeline 79:"3840x2160" 24 297000 3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 [ 6.343062] [drm:drm_mode_debug_printmodeline] Modeline 105:"3840x2160" 24 296703 3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 [ 6.354826] [drm:drm_mode_debug_printmodeline] Modeline 85:"1920x1080" 120 297000 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.366590] [drm:drm_mode_debug_printmodeline] Modeline 109:"1920x1080" 120 296703 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.378439] [drm:drm_mode_debug_printmodeline] Modeline 86:"1920x1080" 100 297000 1920 2448 2492 2640 1080 1084 1089 1125 0x40 0x5 [ 6.390202] [drm:drm_mode_debug_printmodeline] Modeline 50:"1920x1080" 60 148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.401879] [drm:drm_mode_debug_printmodeline] Modeline 92:"1920x1080" 60 148352 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.413557] [drm:drm_mode_debug_printmodeline] Modeline 64:"1920x1080" 50 148500 1920 2448 2492 2640 1080 1084 1089 1125 0x40 0x5 [ 6.425234] [drm:drm_mode_debug_printmodeline] Modeline 76:"1920x1080" 30 74250 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.436825] [drm:drm_mode_debug_printmodeline] Modeline 103:"1920x1080" 30 74176 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5 [ 6.448502] [drm:drm_mode_debug_printmodeline] Modeline 75:"1920x1080" 25 74250 1920 2448 2492 2640 1080 1084 1089 1125 0x40 0x5 [ 6.460092] [drm:drm_mode_debug_printmodeline] Modeline 74:"1920x1080" 24 74250 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5 [ 6.471682] [drm:drm_mode_debug_printmodeline] Modeline 102:"1920x1080" 24 74176 1920 2558 2602 2750 1080 1084 1089 1125 0x40 0x5 [ 6.483359] [drm:drm_mode_debug_printmodeline] Modeline 56:"1280x1024" 60 108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5 [ 6.495035] [drm:drm_mode_debug_printmodeline] Modeline 51:"1360x768" 60 85500 1360 1424 1536 1792 768 771 777 795 0x40 0x5 [ 6.506192] [drm:drm_mode_debug_printmodeline] Modeline 55:"1152x864" 60 81579 1152 1216 1336 1520 864 865 868 895 0x0 0x6 [ 6.517262] [drm:drm_mode_debug_printmodeline] Modeline 67:"1280x720" 60 74250 1280 1390 1430 1650 720 725 730 750 0x40 0x5 [ 6.528419] [drm:drm_mode_debug_printmodeline] Modeline 98:"1280x720" 60 74176 1280 1390 1430 1650 720 725 730 750 0x40 0x5 [ 6.539577] [drm:drm_mode_debug_printmodeline] Modeline 68:"1280x720" 50 74250 1280 1720 1760 1980 720 725 730 750 0x40 0x5 [ 6.550734] [drm:drm_mode_debug_printmodeline] Modeline 54:"1024x768" 60 65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa [ 6.561892] [drm:drm_mode_debug_printmodeline] Modeline 53:"800x600" 60 40000 800 840 968 1056 600 601 605 628 0x40 0x5 [ 6.572702] [drm:drm_mode_debug_printmodeline] Modeline 73:"720x576" 50 27000 720 732 796 864 576 581 586 625 0x40 0xa [ 6.583426] [drm:drm_mode_debug_printmodeline] Modeline 100:"720x480" 60 27027 720 736 798 858 480 489 495 525 0x40 0xa [ 6.594236] [drm:drm_mode_debug_printmodeline] Modeline 71:"720x480" 60 27000 720 736 798 858 480 489 495 525 0x40 0xa [ 6.604960] [drm:drm_mode_debug_printmodeline] Modeline 93:"640x480" 60 25200 640 656 752 800 480 490 492 525 0x40 0xa [ 6.615684] [drm:drm_mode_debug_printmodeline] Modeline 52:"640x480" 60 25175 640 656 752 800 480 490 492 525 0x40 0xa [ 6.626407] [drm:drm_mode_debug_printmodeline] Modeline 59:"720x400" 70 28320 720 738 846 900 400 412 414 449 0x40 0x6 [ 6.637127] [drm:drm_setup_crtcs] connector 46 enabled? yes [ 6.642701] [drm:drm_setup_crtcs] looking for cmdline mode on connector 46 [ 6.649606] [drm:drm_setup_crtcs] looking for preferred mode on connector 46 0 [ 6.656855] [drm:drm_setup_crtcs] found mode 4096x2160 [ 6.661995] [drm:drm_setup_crtcs] picking CRTCs for 4096x4096 config [ 6.668389] [drm:drm_setup_crtcs] desired mode 4096x2160 set on crtc 32 (0,0) [ 6.675563] [drm:drm_mode_object_get] OBJ ID: 46 (2) [ 7.898152] vmap allocation for size 353898496 failed: use vmalloc=<size> to increase size [ 7.906540] drm drm: failed to vmap() framebuffer [ 7.911257] [drm:drm_mode_object_put.part.0] OBJ ID: 57 (1) [ 8.195039] [drm:drm_fb_helper_hotplug_event.part.9] [ 8.200096] [drm:drm_setup_crtcs] [ 8.203558] drm drm: failed to set initial configuration: -12 [ 8.203677] ------------[ cut here ]------------ [ 8.203695] WARNING: CPU: 0 PID: 16 at kernel/locking/mutex-debug.c:103 mutex_destroy+0x74/0x78 [ 8.203700] DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock)) [ 8.203705] Modules linked in: [ 8.203719] CPU: 0 PID: 16 Comm: kworker/0:1 Not tainted 4.15.0-rc7-00008-g7c35d04354b7 #37 [ 8.203725] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree) [ 8.203738] Workqueue: events deferred_probe_work_func [ 8.203760] [<c0110ff4>] (unwind_backtrace) from [<c010c898>] (show_stack+0x10/0x14) [ 8.203774] [<c010c898>] (show_stack) from [<c098b790>] (dump_stack+0x8c/0xa0) [ 8.203787] [<c098b790>] (dump_stack) from [<c01222a4>] (__warn+0xe0/0xf8) [ 8.203797] [<c01222a4>] (__warn) from [<c01222f4>] (warn_slowpath_fmt+0x38/0x48) [ 8.203810] [<c01222f4>] (warn_slowpath_fmt) from [<c017850c>] (mutex_destroy+0x74/0x78) [ 8.203823] [<c017850c>] (mutex_destroy) from [<c04e3484>] (drm_fb_helper_fini+0xbc/0xec) [ 8.203835] [<c04e3484>] (drm_fb_helper_fini) from [<c050f738>] (tegra_drm_fb_init+0x74/0xb0) [ 8.203846] [<c050f738>] (tegra_drm_fb_init) from [<c050d72c>] (tegra_drm_load+0x2a4/0x32c) [ 8.203859] [<c050d72c>] (tegra_drm_load) from [<c04ebc00>] (drm_dev_register+0x13c/0x1d4) [ 8.203870] [<c04ebc00>] (drm_dev_register) from [<c050d1fc>] (host1x_drm_probe+0x34/0x58) [ 8.203882] [<c050d1fc>] (host1x_drm_probe) from [<c05769a8>] (driver_probe_device+0x254/0x32c) [ 8.203896] [<c05769a8>] (driver_probe_device) from [<c0574d48>] (bus_for_each_drv+0x44/0x94) [ 8.203909] [<c0574d48>] (bus_for_each_drv) from [<c0576674>] (__device_attach+0xb4/0x118) [ 8.203922] [<c0576674>] (__device_attach) from [<c0575be0>] (bus_probe_device+0x88/0x90) [ 8.203935] [<c0575be0>] (bus_probe_device) from [<c0573fa0>] (device_add+0x394/0x598) [ 8.203950] [<c0573fa0>] (device_add) from [<c04c35b8>] (host1x_subdev_register+0xf0/0x118) [ 8.203964] [<c04c35b8>] (host1x_subdev_register) from [<c04c3b2c>] (host1x_client_register+0x130/0x14c) [ 8.203978] [<c04c3b2c>] (host1x_client_register) from [<c054170c>] (tegra_hdmi_probe+0x1e4/0x2d0) [ 8.203990] [<c054170c>] (tegra_hdmi_probe) from [<c0578754>] (platform_drv_probe+0x50/0xac) [ 8.204001] [<c0578754>] (platform_drv_probe) from [<c05769a8>] (driver_probe_device+0x254/0x32c) [ 8.204014] [<c05769a8>] (driver_probe_device) from [<c0574d48>] (bus_for_each_drv+0x44/0x94) [ 8.204027] [<c0574d48>] (bus_for_each_drv) from [<c0576674>] (__device_attach+0xb4/0x118) [ 8.204040] [<c0576674>] (__device_attach) from [<c0575be0>] (bus_probe_device+0x88/0x90) [ 8.204053] [<c0575be0>] (bus_probe_device) from [<c0575fe8>] (deferred_probe_work_func+0x54/0x160) [ 8.204066] [<c0575fe8>] (deferred_probe_work_func) from [<c013db40>] (process_one_work+0x288/0x6f4) [ 8.204077] [<c013db40>] (process_one_work) from [<c013ef5c>] (worker_thread+0x234/0x548) [ 8.204089] [<c013ef5c>] (worker_thread) from [<c0144034>] (kthread+0x160/0x168) [ 8.204103] [<c0144034>] (kthread) from [<c0107d28>] (ret_from_fork+0x14/0x2c) [ 8.204109] ---[ end trace 819e9d4700a61904 ]--- [ 8.204120] [drm:drm_mode_object_put.part.0] OBJ ID: 46 (3) [ 8.204130] [drm:drm_mode_object_put.part.0] OBJ ID: 46 (2) [ 8.498149] Unable to handle kernel paging request at virtual address 6b6b6b6b [ 8.505390] pgd = 8cebd0aa [ 8.508098] [6b6b6b6b] *pgd=00000000 [ 8.511685] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 8.516994] Modules linked in: [ 8.520059] CPU: 0 PID: 3 Comm: kworker/0:0 Tainted: G W 4.15.0-rc7-00008-g7c35d04354b7 #37 [ 8.529614] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree) [ 8.535880] Workqueue: events output_poll_execute [ 8.540591] PC is at drm_setup_crtcs+0x130/0xd90 [ 8.545205] LR is at 0x0 [ 8.547740] pc : [<c04e3748>] lr : [<00000000>] psr: 20000113 [ 8.554000] sp : ee8b3e00 ip : ee8b2000 fp : c2ddee00 [ 8.559220] r10: c2db8600 r9 : c0f560e4 r8 : 00000001 [ 8.564440] r7 : 6b6b6b6b r6 : 6b6b6b6b r5 : 00000000 r4 : 00000001 [ 8.570961] r3 : 6b6b6b6b r2 : 6b6b6b6b r1 : 6b6b6b6b r0 : 00000000 [ 8.577484] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 8.584612] Control: 10c5387d Table: 8000406a DAC: 00000051 [ 8.590352] Process kworker/0:0 (pid: 3, stack limit = 0x59b66d66) [ 8.596526] Stack: (0xee8b3e00 to 0xee8b4000) [ 8.600888] 3e00: 00000000 00000000 c14b147a 00000029 00000000 c2dded80 c2dde8c0 c2dded40 [ 8.609061] 3e20: 00000004 6b6b6b6b 6b6b6b6b c0c055a0 c04e48d4 eef89d40 c2dd9000 00000001 [ 8.617234] 3e40: c2dd9254 c0f08468 00000001 c0185dc4 c0c35600 ee8b3e74 00000001 c0186924 [ 8.625405] 3e60: 00000001 ee8b3e74 00000000 c04eb2d0 c0c35600 c0c055a0 c04e48d4 c0c08ac4 [ 8.633578] 3e80: ee8b3e90 c0f08468 00000001 c2db8600 c2db86d0 eef89d40 00000000 00000001 [ 8.641750] 3ea0: c2dd9254 c0f08468 00000001 c04e48e8 c2dd943c c2dd9000 eef89d40 c04d4bf4 [ 8.649922] 3ec0: c013da40 00000000 00000000 ee8b13e0 eef89d40 c017ba90 00000000 00000000 [ 8.658093] 3ee0: eef89d40 c2dd943c ee886900 eef89d40 eef8d100 ee8b3f20 c0fbc134 c0f08468 [ 8.666265] 3f00: 00000001 c013db40 00000001 00000000 c013da40 c14b0f7c 00000000 00000000 [ 8.674437] 3f20: c14e88b0 c1210b3c 00000000 c0c32ba4 ffffe000 ee886900 eef89d40 ee886918 [ 8.682609] 3f40: c0f05900 eef89d74 ffffe000 00000008 eef89d40 c013ed68 c0fbbbe4 00000000 [ 8.690781] 3f60: ffffe000 ee886880 ee83db80 00000000 ee8b2000 ee886900 c013ed28 ee8abebc [ 8.698952] 3f80: ee8868b8 c0144034 00000000 ee83db80 c0143ed4 00000000 00000000 00000000 [ 8.707124] 3fa0: 00000000 00000000 00000000 c0107d28 00000000 00000000 00000000 00000000 [ 8.715294] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 8.723466] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 ffffffff 00000008 [ 8.731640] [<c04e3748>] (drm_setup_crtcs) from [<c04e48e8>] (drm_fb_helper_hotplug_event.part.9+0x94/0xb4) [ 8.741374] [<c04e48e8>] (drm_fb_helper_hotplug_event.part.9) from [<c04d4bf4>] (output_poll_execute+0x8c/0x1a8) [ 8.751540] [<c04d4bf4>] (output_poll_execute) from [<c013db40>] (process_one_work+0x288/0x6f4) [ 8.760232] [<c013db40>] (process_one_work) from [<c013ed68>] (worker_thread+0x40/0x548) [ 8.768319] [<c013ed68>] (worker_thread) from [<c0144034>] (kthread+0x160/0x168) [ 8.775715] [<c0144034>] (kthread) from [<c0107d28>] (ret_from_fork+0x14/0x2c) [ 8.782936] Code: e1a02007 e1a01006 e7933104 e2844001 (e5930000) [ 8.789063] ---[ end trace 819e9d4700a61905 ]--- [
-- Stefan