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Subject: Re: drm: rockchip: CONFIG_DRM_FBDEV_EMULATION will crash the HDMI
 down sometimes
To: Randy Li <randy.li@rock-chips.com>
References: <edb88801-6ea1-3909-2e4e-ba78df6d3c7c@rock-chips.com>
Cc: airlied@linux.ie, heiko@sntech.de, dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
        "ayaka@soulik.info" <ayaka@soulik.info>
From: Mark yao <mark.yao@rock-chips.com>
Message-ID: <587DD4E3.5070202@rock-chips.com>
Date: Tue, 17 Jan 2017 16:25:07 +0800
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static void vop_plane_atomic_update(struct drm_plane *plane,
         struct drm_plane_state *old_state)
{
     if (WARN_ON(!vop->is_enabled))
         return;

The issues seems vop is not enable. but commit planes is using 
DRM_PLANE_COMMIT_ACTIVE_ONLY...

Hi Randy

Can you add some print for this bug:
     1, I think vop_crtc_enable function should be call before 
vop_plane_atomic_update, you can add some print to verified it.
     2, also add a trace on vop_crtc_disable.
     3, print the status of  crtc->state->active and 
plane_crtc_active(plane->state) when bug happen.

Thanks.
On 2017年01月17日 15:58, Randy Li wrote:
> 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 ]---


-- 
Ｍark Yao