fsl-dcu not works on latest "drm-next"

[Meng Yi]

Hi,


I just tested the latest drm-next branch on Freescale/NXP ls1021a-twr, and got some log below. And fsl-dcu not works.

Since "drm-next" merged some branch , use git bisect had some problem ,

so I manually checked out that "fsl-dcu" works at d761701c55a99598477f3cb25c03d939a7711e74

And not works now. some log below:



[drm] Initialized drm 1.1.0 20060810
panel supply power not found, using dummy regulator
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] No driver support for vblank timestamp query.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_atomic_helper.c:1106 drm_atomic_helper_wait_for_vblanks+0xff/0x124
[CRTC:24] vblank wait timed out
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.6.0-rc3+ #189
Hardware name: Freescale LS1021A
[<80209a7b>] (unwind_backtrace) from [<8020755f>] (show_stack+0xb/0xc)
[<8020755f>] (show_stack) from [<803676a3>] (dump_stack+0x5b/0x74)
[<803676a3>] (dump_stack) from [<80211a37>] (__warn+0x87/0xb0)
[<80211a37>] (__warn) from [<80211a7f>] (warn_slowpath_fmt+0x1f/0x28)
[<80211a7f>] (warn_slowpath_fmt) from [<803ca887>] (drm_atomic_helper_wait_for_vblanks+0xff/0x124)
[<803ca887>] (drm_atomic_helper_wait_for_vblanks) from [<803cb307>] (drm_atomic_helper_commit+0x43/0x5c)
[<803cb307>] (drm_atomic_helper_commit) from [<803cbe51>] (restore_fbdev_mode+0xad/0x16e)
[<803cbe51>] (restore_fbdev_mode) from [<803ccf4d>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x19/0x44)
[<803ccf4d>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<803ccf9d>] (drm_fb_helper_set_par+0x25/0x38)
[<803ccf9d>] (drm_fb_helper_set_par) from [<80397451>] (fbcon_init+0x1fd/0x2c0)
[<80397451>] (fbcon_init) from [<803b6051>] (visual_init+0x71/0xb4)
[<803b6051>] (visual_init) from [<803b6f95>] (do_bind_con_driver+0x105/0x1e4)
[<803b6f95>] (do_bind_con_driver) from [<803b7287>] (do_take_over_console+0xcf/0x108)
[<803b7287>] (do_take_over_console) from [<80397549>] (do_fbcon_takeover+0x35/0x7c)
[<80397549>] (do_fbcon_takeover) from [<802229db>] (notifier_call_chain+0x23/0x38)
[<802229db>] (notifier_call_chain) from [<80222b63>] (__blocking_notifier_call_chain+0x27/0x36)
[<80222b63>] (__blocking_notifier_call_chain) from [<80222b81>] (blocking_notifier_call_chain+0xf/0x14)
[<80222b81>] (blocking_notifier_call_chain) from [<8039bdf9>] (register_framebuffer+0x179/0x1d0)
[<8039bdf9>] (register_framebuffer) from [<803cd15f>] (drm_fb_helper_initial_config+0x1af/0x200)
[<803cd15f>] (drm_fb_helper_initial_config) from [<803cd593>] (drm_fbdev_cma_init+0x67/0xa8)
[<803cd593>] (drm_fbdev_cma_init) from [<803e2269>] (fsl_dcu_fbdev_init+0x11/0x14)
[<803e2269>] (fsl_dcu_fbdev_init) from [<803e18eb>] (fsl_dcu_load+0x81/0xba)
[<803e18eb>] (fsl_dcu_load) from [<803d2d51>] (drm_dev_register+0x3d/0x68)
[<803d2d51>] (drm_dev_register) from [<803e1ab7>] (fsl_dcu_drm_probe+0x193/0x240)
[<803e1ab7>] (fsl_dcu_drm_probe) from [<803e6d2d>] (platform_drv_probe+0x33/0x62)
[<803e6d2d>] (platform_drv_probe) from [<803e5e7d>] (driver_probe_device+0xb9/0x1a4)
[<803e5e7d>] (driver_probe_device) from [<803e5fad>] (__driver_attach+0x45/0x58)
[<803e5fad>] (__driver_attach) from [<803e4eeb>] (bus_for_each_dev+0x3b/0x46)
[<803e4eeb>] (bus_for_each_dev) from [<803e5897>] (bus_add_driver+0x7b/0x138)
[<803e5897>] (bus_add_driver) from [<803e6469>] (driver_register+0x4b/0x76)
[<803e6469>] (driver_register) from [<80201517>] (do_one_initcall+0xb3/0x138)
[<80201517>] (do_one_initcall) from [<80800a61>] (kernel_init_freeable+0xd1/0x168)
[<80800a61>] (kernel_init_freeable) from [<80558d13>] (kernel_init+0x7/0xb4)
[<80558d13>] (kernel_init) from [<80205261>] (ret_from_fork+0x11/0x30)
---[ end trace b7946726c4e290c4 ]---
Console: switching to colour frame buffer device 60x34
fsl-dcu 2ce0000.dcu: fb0:  frame buffer device
[drm] Initialized fsl-dcu-drm 1.1.0 20160425 on minor 0


And full log in the attachment.

does anybody have any idea about this?

Best Regards,
Meng Yi

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