drm: rockchip: CONFIG_DRM_FBDEV_EMULATION will crash the HDMI down sometimes

[Randy Li <randy.li@rock-chips.com>]

Hello:
   I want to enable the video output at RK3288 Firefly board, but I 
found if I enable CONFIG_DRM_FBDEV_EMULATION, the HDMI would crash down 
sometimes but sometimes it works. After disable that opinion, I never 
meet a problem. I have not verified it with eDP as I meet a big problem 
in there.

[  OK  ] Stopped LSB: Load kernel modules needed to enable cpufreq scaling.
[   33.282843] [drm:drm_atomic_helper_commit_cleanup_done 
[drm_kms_helper]] *ERROR* [CRTC:27:crtc-0] flip_done timed out
[   33.361489] ------------[ cut here ]------------
[   33.366251] WARNING: CPU: 2 PID: 476 at 
/home/ayaka/workspace/rk3288/kernel/linux-kernel/drivers/gpu/drm/rockchip/rockchip_drm$
vop.c:730 vop_plane_atomic_update+0x1218/0x177c [rockchipdrm]
[   33.383071] Modules linked in: rockchip_vop_reg rockchipdrm 
dw_hdmi_rockchip dw_hdmi drm_kms_helper cfbfillrect mali_kbase sys$
opyarea gpio_ir_recv cfbimgblt sysfillrect rc_core dwc2 sysimgblt 
fb_sys_fops panel_simple cfbcopyarea rk_crypto drm nvmem_rockch$
p_efuse udc_core des_generic phy_rockchip_usb pwm_rockchip pwm_bl 
backlight fb
[   33.412751] CPU: 2 PID: 476 Comm: X Tainted: G        W 
4.10.0-rc3-next-20170111+ #148
[   33.421182] Hardware name: Rockchip (Device Tree)
[   33.425905] [<c0112b98>] (unwind_backtrace) from [<c010dab8>] 
(show_stack+0x20/0x24)
[   33.433652] [<c010dab8>] (show_stack) from [<c044973c>] 
(dump_stack+0x8c/0xa0)
[   33.440881] [<c044973c>] (dump_stack) from [<c0125f88>] 
(__warn+0xf8/0x110)
[   33.447839] [<c0125f88>] (__warn) from [<c01260b8>] 
(warn_slowpath_null+0x30/0x38)
[   33.455431] [<c01260b8>] (warn_slowpath_null) from [<bf5cb4dc>] 
(vop_plane_atomic_update+0x1218/0x177c [rockchipdrm])
[   33.466126] [<bf5cb4dc>] (vop_plane_atomic_update [rockchipdrm]) from 
[<bf4d8590>] (drm_atomic_helper_commit_planes+0xd4/0x2b8
[drm_kms_helper])
[   33.479160] [<bf4d8590>] (drm_atomic_helper_commit_planes 
[drm_kms_helper]) from [<bf5c6a88>] (rockchip_atomic_commit_tail+0x4$
/0x68 [rockchipdrm])
[   33.492451] [<bf5c6a88>] (rockchip_atomic_commit_tail [rockchipdrm]) 
from [<bf4dc714>] (commit_tail+0x50/0xb8 [drm_kms_helper]$
[   33.504061] [<bf4dc714>] (commit_tail [drm_kms_helper]) from 
[<bf4dc870>] (drm_atomic_helper_commit+0xd4/0x13c [drm_kms_helper$
)
[   33.515850] [<bf4dc870>] (drm_atomic_helper_commit [drm_kms_helper]) 
from [<bf09318c>] (drm_atomic_commit+0x5c/0x68 [drm])
[   33.527126] [<bf09318c>] (drm_atomic_commit [drm]) from [<bf4e00f8>] 
(restore_fbdev_mode+0x160/0x300 [drm_kms_helper])
[   33.537952] [<bf4e00f8>] (restore_fbdev_mode [drm_kms_helper]) from 
[<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x$
0/0x84 [drm_kms_helper])
[   33.551590] [<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked 
[drm_kms_helper]) from [<bf5c6218>] (rockchip_drm_lastclos$
+0x1c/0x20 [rockchipdrm])
[   33.565404] [<bf5c6218>] (rockchip_drm_lastclose [rockchipdrm]) from 
[<bf07d20c>] (drm_lastclose+0x48/0xd8 [drm])
[   33.575977] [<bf07d20c>] (drm_lastclose [drm]) from [<bf07d560>] 
(drm_release+0x2c4/0x36c [drm])
[   33.584927] [<bf07d560>] (drm_release [drm]) from [<c02d7b34>] 
(__fput+0x9c/0x1e8)
[   33.592501] [<c02d7b34>] (__fput) from [<c02d7cf0>] (____fput+0x18/0x1c)
[   33.599206] [<c02d7cf0>] (____fput) from [<c0146ed4>] 
(task_work_run+0xcc/0xf0)
[   33.606519] [<c0146ed4>] (task_work_run) from [<c010d1b0>] 
(do_work_pending+0xd0/0xd4)
[   33.614439] [<c010d1b0>] (do_work_pending) from [<c0108e28>] 
(slow_work_pending+0xc/0x20)
[   33.622674] ---[ end trace 95ed2c3f167607d2 ]---
[   33.627327] ------------[ cut here ]------------
[   33.632013] WARNING: CPU: 2 PID: 476 at 
/home/ayaka/workspace/rk3288/kernel/linux-kernel/drivers/gpu/drm/rockchip/rockchip_drm_
vop.c:1017 vop_crtc_atomic_flush+0x27c/0x2b8 [rockchipdrm]
[   33.648542] Modules linked in: rockchip_vop_reg rockchipdrm 
dw_hdmi_rockchip dw_hdmi drm_kms_helper cfbfillrect mali_kbase sysc
opyarea gpio_ir_recv cfbimgblt sysfillrect rc_core dwc2 sysimgblt 
fb_sys_fops panel_simple cfbcopyarea rk_crypto drm nvmem_rockchi
p_efuse udc_core des_generic phy_rockchip_usb pwm_rockchip pwm_bl 
backlight fb
[   33.678191] CPU: 2 PID: 476 Comm: X Tainted: G        W 
4.10.0-rc3-next-20170111+ #148
[   33.686621] Hardware name: Rockchip (Device Tree)
[   33.691339] [<c0112b98>] (unwind_backtrace) from [<c010dab8>] 
(show_stack+0x20/0x24)
[   33.699084] [<c010dab8>] (show_stack) from [<c044973c>] 
(dump_stack+0x8c/0xa0)
[   33.706309] [<c044973c>] (dump_stack) from [<c0125f88>] 
(__warn+0xf8/0x110)
[   33.713275] [<c0125f88>] (__warn) from [<c01260b8>] 
(warn_slowpath_null+0x30/0x38)
[   33.720864] [<c01260b8>] (warn_slowpath_null) from [<bf5c83e0>] 
(vop_crtc_atomic_flush+0x27c/0x2b8 [rockchipdrm])
[   33.731208] [<bf5c83e0>] (vop_crtc_atomic_flush [rockchipdrm]) from 
[<bf4d868c>] (drm_atomic_helper_commit_planes+0x1d0/0x2b8 [
drm_kms_helper])
[   33.744159] [<bf4d868c>] (drm_atomic_helper_commit_planes 
[drm_kms_helper]) from [<bf5c6a88>] (rockchip_atomic_commit_tail+0x44
/0x68 [rockchipdrm])
[   33.757451] [<bf5c6a88>] (rockchip_atomic_commit_tail [rockchipdrm]) 
from [<bf4dc714>] (commit_tail+0x50/0xb8 [drm_kms_helper])
[   33.769064] [<bf4dc714>] (commit_tail [drm_kms_helper]) from 
[<bf4dc870>] (drm_atomic_helper_commit+0xd4/0x13c [drm_kms_helper]
)
[   33.780861] [<bf4dc870>] (drm_atomic_helper_commit [drm_kms_helper]) 
from [<bf09318c>] (drm_atomic_commit+0x5c/0x68 [drm])
[   33.792131] [<bf09318c>] (drm_atomic_commit [drm]) from [<bf4e00f8>] 
(restore_fbdev_mode+0x160/0x300 [drm_kms_helper])
[   33.802956] [<bf4e00f8>] (restore_fbdev_mode [drm_kms_helper]) from 
[<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x4
0/0x84 [drm_kms_helper])
[   33.816590] [<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked 
[drm_kms_helper]) from [<bf5c6218>] (rockchip_drm_lastclose
+0x1c/0x20 [rockchipdrm])
[   33.830406] [<bf5c6218>] (rockchip_drm_lastclose [rockchipdrm]) from 
[<bf07d20c>] (drm_lastclose+0x48/0xd8 [drm])
[   33.840975] [<bf07d20c>] (drm_lastclose [drm]) from [<bf07d560>] 
(drm_release+0x2c4/0x36c [drm])
[   33.849923] [<bf07d560>] (drm_release [drm]) from [<c02d7b34>] 
(__fput+0x9c/0x1e8)
[   33.857497] [<c02d7b34>] (__fput) from [<c02d7cf0>] (____fput+0x18/0x1c)
[   33.864201] [<c02d7cf0>] (____fput) from [<c0146ed4>] 
(task_work_run+0xcc/0xf0)
[   33.871514] [<c0146ed4>] (task_work_run) from [<c010d1b0>] 
(do_work_pending+0xd0/0xd4)
[   33.879434] [<c010d1b0>] (do_work_pending) from [<c0108e28>] 
(slow_work_pending+0xc/0x20)
[   33.887671] ---[ end trace 95ed2c3f167607d3 ]---
[   33.892322] ------------[ cut here ]------------
[   33.897058] WARNING: CPU: 2 PID: 476 at 
/home/ayaka/workspace/rk3288/kernel/linux-kernel/drivers/gpu/drm/drm_atomic_helper.c:15
63 drm_atomic_helper_commit_hw_done+0xc0/0xc8 [drm_kms_helper]
[   33.913937] Modules linked in: rockchip_vop_reg rockchipdrm 
dw_hdmi_rockchip dw_hdmi drm_kms_helper cfbfillrect mali_kbase sysc
opyarea gpio_ir_recv cfbimgblt sysfillrect rc_core dwc2 sysimgblt 
fb_sys_fops panel_simple cfbcopyarea rk_crypto drm nvmem_rockchi
p_efuse udc_core des_generic phy_rockchip_usb pwm_rockchip pwm_bl 
backlight fb
[   33.943581] CPU: 2 PID: 476 Comm: X Tainted: G        W 
4.10.0-rc3-next-20170111+ #148
[   33.952010] Hardware name: Rockchip (Device Tree)
[   33.956726] [<c0112b98>] (unwind_backtrace) from [<c010dab8>] 
(show_stack+0x20/0x24)
[   33.964470] [<c010dab8>] (show_stack) from [<c044973c>] 
(dump_stack+0x8c/0xa0)
[   33.971695] [<c044973c>] (dump_stack) from [<c0125f88>] 
(__warn+0xf8/0x110)
[   33.978661] [<c0125f88>] (__warn) from [<c01260b8>] 
(warn_slowpath_null+0x30/0x38)
[   33.986301] [<c01260b8>] (warn_slowpath_null) from [<bf4d9410>] 
(drm_atomic_helper_commit_hw_done+0xc0/0xc8 [drm_kms_helper])
[   33.997686] [<bf4d9410>] (drm_atomic_helper_commit_hw_done 
[drm_kms_helper]) from [<bf5c6a90>] (rockchip_atomic_commit_tail+0x4
c/0x68 [rockchipdrm])
[   34.011062] [<bf5c6a90>] (rockchip_atomic_commit_tail [rockchipdrm]) 
from [<bf4dc714>] (commit_tail+0x50/0xb8 [drm_kms_helper])
[   34.022670] [<bf4dc714>] (commit_tail [drm_kms_helper]) from 
[<bf4dc870>] (drm_atomic_helper_commit+0xd4/0x13c [drm_kms_helper]
)
[   34.034458] [<bf4dc870>] (drm_atomic_helper_commit [drm_kms_helper]) 
from [<bf09318c>] (drm_atomic_commit+0x5c/0x68 [drm])
[   34.045728] [<bf09318c>] (drm_atomic_commit [drm]) from [<bf4e00f8>] 
(restore_fbdev_mode+0x160/0x300 [drm_kms_helper])
[   34.056555] [<bf4e00f8>] (restore_fbdev_mode [drm_kms_helper]) from 
[<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x4
0/0x84 [drm_kms_helper])
[   34.070190] [<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked 
[drm_kms_helper]) from [<bf5c6218>] (rockchip_drm_lastclose
+0x1c/0x20 [rockchipdrm])
[   34.084005] [<bf5c6218>] (rockchip_drm_lastclose [rockchipdrm]) from 
[<bf07d20c>] (drm_lastclose+0x48/0xd8 [drm])
[   34.094581] [<bf07d20c>] (drm_lastclose [drm]) from [<bf07d560>] 
(drm_release+0x2c4/0x36c [drm])
[   34.103526] [<bf07d560>] (drm_release [drm]) from [<c02d7b34>] 
(__fput+0x9c/0x1e8)
[   34.111099] [<c02d7b34>] (__fput) from [<c02d7cf0>] (____fput+0x18/0x1c)
[   34.117802] [<c02d7cf0>] (____fput) from [<c0146ed4>] 
(task_work_run+0xcc/0xf0)
[   34.125115] [<c0146ed4>] (task_work_run) from [<c010d1b0>] 
(do_work_pending+0xd0/0xd4)
[   34.133034] [<c010d1b0>] (do_work_pending) from [<c0108e28>] 
(slow_work_pending+0xc/0x20)
[   34.141250] ---[ end trace 95ed2c3f167607d4 ]---
[   34.145921] ------------[ cut here ]------------
[   34.150566] WARNING: CPU: 2 PID: 476 at 
/home/ayaka/workspace/rk3288/kernel/linux-kernel/drivers/gpu/drm/rockchip/rockchip_drm_
vop.c:828 vop_crtc_enable_vblank+0x1ac/0x1b4 [rockchipdrm]
[   34.167054] Modules linked in: rockchip_vop_reg rockchipdrm 
dw_hdmi_rockchip dw_hdmi drm_kms_helper cfbfillrect mali_kbase sysc
opyarea gpio_ir_recv cfbimgblt sysfillrect rc_core dwc2 sysimgblt 
fb_sys_fops panel_simple cfbcopyarea rk_crypto drm nvmem_rockchi
p_efuse udc_core des_generic phy_rockchip_usb pwm_rockchip pwm_bl 
backlight fb
[   34.196651] CPU: 2 PID: 476 Comm: X Tainted: G        W 
4.10.0-rc3-next-20170111+ #148
[   34.205078] Hardware name: Rockchip (Device Tree)
[   34.209794] [<c0112b98>] (unwind_backtrace) from [<c010dab8>] 
(show_stack+0x20/0x24)
[   34.217538] [<c010dab8>] (show_stack) from [<c044973c>] 
(dump_stack+0x8c/0xa0)
[   34.224763] [<c044973c>] (dump_stack) from [<c0125f88>] 
(__warn+0xf8/0x110)
[   34.231729] [<c0125f88>] (__warn) from [<c01260b8>] 
(warn_slowpath_null+0x30/0x38)
[   34.239318] [<c01260b8>] (warn_slowpath_null) from [<bf5c7b7c>] 
(vop_crtc_enable_vblank+0x1ac/0x1b4 [rockchipdrm])
[   34.249693] [<bf5c7b7c>] (vop_crtc_enable_vblank [rockchipdrm]) from 
[<bf5c61f0>] (rockchip_drm_crtc_enable_vblank+0x48/0x54 [r
ockchipdrm])
[   34.262378] [<bf5c61f0>] (rockchip_drm_crtc_enable_vblank 
[rockchipdrm]) from [<bf07ff80>] (drm_vblank_enable+0x8c/0xf8 [drm])
[   34.274077] [<bf07ff80>] (drm_vblank_enable [drm]) from [<bf0800b4>] 
(drm_vblank_get+0xc8/0xf0 [drm])
[   34.283616] [<bf0800b4>] (drm_vblank_get [drm]) from [<bf0800fc>] 
(drm_crtc_vblank_get+0x20/0x24 [drm])
[   34.293239] [<bf0800fc>] (drm_crtc_vblank_get [drm]) from 
[<bf4dc00c>] (drm_atomic_helper_wait_for_vblanks.part.0+0xa8/0x2a8 [d
rm_kms_helper])
[   34.306146] [<bf4dc00c>] (drm_atomic_helper_wait_for_vblanks.part.0 
[drm_kms_helper]) from [<bf4dc230>] (drm_atomic_helper_wait
_for_vblanks+0x24/0x28 [drm_kms_helper])
[   34.321176] [<bf4dc230>] (drm_atomic_helper_wait_for_vblanks 
[drm_kms_helper]) from [<bf5c6a9c>] (rockchip_atomic_commit_tail+0
x58/0x68 [rockchipdrm])
[   34.334725] [<bf5c6a9c>] (rockchip_atomic_commit_tail [rockchipdrm]) 
from [<bf4dc714>] (commit_tail+0x50/0xb8 [drm_kms_helper])
[   34.346330] [<bf4dc714>] (commit_tail [drm_kms_helper]) from 
[<bf4dc870>] (drm_atomic_helper_commit+0xd4/0x13c [drm_kms_helper]
)
[   34.358117] [<bf4dc870>] (drm_atomic_helper_commit [drm_kms_helper]) 
from [<bf09318c>] (drm_atomic_commit+0x5c/0x68 [drm])
[   34.369386] [<bf09318c>] (drm_atomic_commit [drm]) from [<bf4e00f8>] 
(restore_fbdev_mode+0x160/0x300 [drm_kms_helper])
[   34.380209] [<bf4e00f8>] (restore_fbdev_mode [drm_kms_helper]) from 
[<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x4
0/0x84 [drm_kms_helper])
[   34.393845] [<bf4e171c>] (drm_fb_helper_restore_fbdev_mode_unlocked 
[drm_kms_helper]) from [<bf5c6218>] (rockchip_drm_lastclose
+0x1c/0x20 [rockchipdrm])
[   34.407664] [<bf5c6218>] (rockchip_drm_lastclose [rockchipdrm]) from 
[<bf07d20c>] (drm_lastclose+0x48/0xd8 [drm])
[   34.418237] [<bf07d20c>] (drm_lastclose [drm]) from [<bf07d560>] 
(drm_release+0x2c4/0x36c [drm])
[   34.427179] [<bf07d560>] (drm_release [drm]) from [<c02d7b34>] 
(__fput+0x9c/0x1e8)
[   34.434754] [<c02d7b34>] (__fput) from [<c02d7cf0>] (____fput+0x18/0x1c)
[   34.441458] [<c02d7cf0>] (____fput) from [<c0146ed4>] 
(task_work_run+0xcc/0xf0)
[   34.448769] [<c0146ed4>] (task_work_run) from [<c010d1b0>] 
(do_work_pending+0xd0/0xd4)
[   34.456688] [<c010d1b0>] (do_work_pending) from [<c0108e28>] 
(slow_work_pending+0xc/0x20)
[   34.464856] ---[ end trace 95ed2c3f167607d5 ]---
-- 
Randy Li
The third produce department
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