I'm trying to get the latest linux-next working on my Chromebook2 (it's booting to a serial console) and am now trying to get the display working (at least for a frambuffer console.)
Since the display nodes seem to be present in the exynos5800-peach-pi DTS, I tried enabling DRM and it's failing to allocate memory (log below[1]
Is there some additional memory setup/allocations I should be doing? maybe with CMA?
Thanks for any advice,
Kevin
[1] DRM output with drm.debug=0xf on command line
[ 1.095622] [drm] Initialized drm 1.1.0 20060810 [ 1.099792] [drm:drm_platform_init] [ 1.102311] [drm:drm_get_platform_dev] [ 1.106211] [drm:drm_minor_register] [ 1.110000] [drm:drm_minor_register] new minor assigned 64 [ 1.115265] [drm:drm_minor_register] [ 1.118900] [drm:drm_minor_register] [ 1.122693] [drm:drm_minor_register] new minor assigned 0 [ 1.127970] [drm:exynos_drm_encoder_create] possible_crtcs = 0x1 [ 1.133915] [drm:exynos_drm_encoder_create] encoder has been created [ 1.140407] [drm:drm_sysfs_connector_add] adding "eDP-1" to sysfs [ 1.146335] [drm:drm_sysfs_hotplug_event] generating hotplug event [ 1.152488] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.159065] [drm] No driver support for vblank timestamp query. [ 1.164965] [drm:drm_helper_hpd_irq_event] [CONNECTOR:15:eDP-1] status updated from unknown to connected [ 1.174418] [drm:drm_sysfs_hotplug_event] generating hotplug event [ 1.180590] [drm:exynos_drm_encoder_dpms] encoder dpms: 3 [ 1.185959] [drm:exynos_drm_crtc_dpms] crtc[6] mode[3] [ 1.191074] [drm:exynos_drm_crtc_dpms] desired dpms mode is same as previous one. [ 1.198538] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:eDP-1] [ 1.206698] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:eDP-1] probed modes : [ 1.216149] [drm:drm_mode_debug_printmodeline] Modeline 16:"1920x1080" 60 150660 1920 1980 2060 2232 1080 1090 1100 1125 0x48 0x0 [ 1.227779] [drm:drm_setup_crtcs] [ 1.231135] [drm:drm_enable_connectors] connector 15 enabled? yes [ 1.237227] [drm:drm_target_preferred] looking for cmdline mode on connector 15 [ 1.244512] [drm:drm_target_preferred] looking for preferred mode on connector 15 [ 1.251972] [drm:drm_target_preferred] found mode 1920x1080 [ 1.257525] [drm:drm_setup_crtcs] picking CRTCs for 4096x4096 config [ 1.263859] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 6 [ 1.270367] [drm:exynos_drm_fbdev_create] surface width(1920), height(1080) and bpp(32 [ 1.278260] [drm:exynos_drm_init_buf] desired size = 0x7e9000 [ 1.283995] [drm:exynos_drm_gem_init] created file object = 0xed7f9200 [ 1.290502] ------------[ cut here ]------------ [ 1.295094] WARNING: CPU: 1 PID: 1 at ../mm/page_alloc.c:2509 __alloc_pages_nodemask+0x220/0x76c() [ 1.304022] Modules linked in: [ 1.307044] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.15.0-rc8-next-20140605-00004-gde16f7d3b2b5-dirty #31 [ 1.316882] [<800152ac>] (unwind_backtrace) from [<80011d94>] (show_stack+0x20/0x24) [ 1.324595] [<80011d94>] (show_stack) from [<805128d8>] (dump_stack+0x74/0x90) [ 1.331790] [<805128d8>] (dump_stack) from [<80024208>] (warn_slowpath_common+0x78/0x9c) [ 1.339854] [<80024208>] (warn_slowpath_common) from [<80024258>] (warn_slowpath_null+0x2c/0x34) [ 1.348622] [<80024258>] (warn_slowpath_null) from [<800c9334>] (__alloc_pages_nodemask+0x220/0x76c) [ 1.357730] [<800c9334>] (__alloc_pages_nodemask) from [<80019fb8>] (__dma_alloc_buffer.isra.13+0x3c/0x184) [ 1.367443] [<80019fb8>] (__dma_alloc_buffer.isra.13) from [<8001a124>] (__alloc_remap_buffer.isra.15+0x24/0xc0) [ 1.377592] [<8001a124>] (__alloc_remap_buffer.isra.15) from [<8001a410>] (__dma_alloc+0x250/0x2e0) [ 1.386613] [<8001a410>] (__dma_alloc) from [<8001a5d8>] (arm_dma_alloc+0x94/0xa0) [ 1.394166] [<8001a5d8>] (arm_dma_alloc) from [<802cf650>] (exynos_drm_alloc_buf+0x118/0x294) [ 1.402663] [<802cf650>] (exynos_drm_alloc_buf) from [<802cfd10>] (exynos_drm_gem_create+0x84/0xec) [ 1.411684] [<802cfd10>] (exynos_drm_gem_create) from [<802cea14>] (exynos_drm_fbdev_create+0xdc/0x2ec) [ 1.421056] [<802cea14>] (exynos_drm_fbdev_create) from [<802b306c>] (drm_fb_helper_initial_config+0x324/0x440) [ 1.431117] [<802b306c>] (drm_fb_helper_initial_config) from [<802ced58>] (exynos_drm_fbdev_init+0xd0/0x10c) [ 1.440918] [<802ced58>] (exynos_drm_fbdev_init) from [<802cef10>] (exynos_drm_output_poll_changed+0x34/0x38) [ 1.450808] [<802cef10>] (exynos_drm_output_poll_changed) from [<802b0a08>] (drm_kms_helper_hotplug_event+0x34/0x38) [ 1.461305] [<802b0a08>] (drm_kms_helper_hotplug_event) from [<802b1148>] (drm_helper_hpd_irq_event+0x108/0x120) [ 1.471455] [<802b1148>] (drm_helper_hpd_irq_event) from [<802cd998>] (exynos_drm_load+0xf0/0x130) [ 1.480390] [<802cd998>] (exynos_drm_load) from [<802bb654>] (drm_dev_register+0x90/0x110) [ 1.488631] [<802bb654>] (drm_dev_register) from [<802bcff0>] (drm_platform_init+0x80/0xf0) [ 1.496958] [<802bcff0>] (drm_platform_init) from [<802cda3c>] (exynos_drm_platform_probe+0x64/0x74) [ 1.506069] [<802cda3c>] (exynos_drm_platform_probe) from [<802de5c8>] (platform_drv_probe+0x28/0x58) [ 1.515263] [<802de5c8>] (platform_drv_probe) from [<802dcf20>] (driver_probe_device+0xc4/0x214) [ 1.524024] [<802dcf20>] (driver_probe_device) from [<802dd144>] (__device_attach+0x38/0x54) [ 1.532444] [<802dd144>] (__device_attach) from [<802db430>] (bus_for_each_drv+0x5c/0xa4) [ 1.540594] [<802db430>] (bus_for_each_drv) from [<802dce04>] (device_attach+0x74/0x98) [ 1.548575] [<802dce04>] (device_attach) from [<802dc430>] (bus_probe_device+0x38/0xa8) [ 1.556556] [<802dc430>] (bus_probe_device) from [<802da628>] (device_add+0x374/0x518) [ 1.564450] [<802da628>] (device_add) from [<802de7fc>] (platform_device_add+0x140/0x1d0) [ 1.572604] [<802de7fc>] (platform_device_add) from [<802dee54>] (platform_device_register_full+0xa8/0xe0) [ 1.582236] [<802dee54>] (platform_device_register_full) from [<80754a04>] (exynos_drm_init+0x74/0xc8) [ 1.591517] [<80754a04>] (exynos_drm_init) from [<80008a48>] (do_one_initcall+0x108/0x1d0) [ 1.599758] [<80008a48>] (do_one_initcall) from [<8072dd64>] (kernel_init_freeable+0x108/0x1d4) [ 1.608433] [<8072dd64>] (kernel_init_freeable) from [<8050e66c>] (kernel_init+0x1c/0xf4) [ 1.616588] [<8050e66c>] (kernel_init) from [<8000e698>] (ret_from_fork+0x14/0x20) [ 1.624143] ---[ end trace 7efd36d9338b10a9 ]--- [ 1.628729] [drm:lowlevel_buffer_allocate] *ERROR* failed to allocate buffer. [ 1.635855] [drm] Initialized exynos 1.0.0 20110530 on minor 0