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

[Meng Yi]

I found that its regmap endianness issue, so I want to replace the "regmap".

Hi Stefan,
Do you have any idea about this?

Hi Mark,
Regmap endianness issue had caused some other drivers not work, like SPI etc. 
Or this is fixed and I just don't know?

Thanks,
Meng

---------------------------------------------------------------------
From: Meng Yi 
Sent: Tuesday, May 03, 2016 5:27 PM
To: 'dri-devel@xxxxxxxxxxxxxxxxxxxxx' <dri-devel@xxxxxxxxxxxxxxxxxxxxx>; David Airlie <airlied@xxxxxxxx>; 'Stefan Agner' <stefan@xxxxxxxx>; 'airlied@xxxxxxxxxx' <airlied@xxxxxxxxxx>
Subject: fsl-dcu not works on latest "drm-next"

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