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When dclk_en is set to true, audio regs may be accessed. If crtc_post_enable() is called at this time, it will cause dclk to be reset, resulting in a crash when accessing the register. The crash stack is as follows: [ 7765.124543][ T2309] CPU: 1 PID: 2309 Comm: writer Tainted: G O 6.1.118 #1989 [ 7765.124551][ T2309] Hardware name: Rockchip RK3576 TEST1 V10 Board (DT) [ 7765.124555][ T2309] pstate: 204000c5 (nzCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 7765.124562][ T2309] pc : regmap_mmio_read32le+0x8/0x20 [ 7765.124577][ T2309] lr : regmap_mmio_read+0x44/0x70 [ 7765.124583][ T2309] sp : ffffffc012483aa0 [ 7765.124586][ T2309] x29: ffffffc012483aa0 x28: 0000000000000004 x27: 0000000000000041 [ 7765.124595][ T2309] x26: fffffffffffffffc x25: 0000000000000000 x24: 0000000000000000 [ 7765.124603][ T2309] x23: 0000000000000e20 x22: ffffff80c2b25800 x21: ffffffc012483b24 [ 7765.124611][ T2309] x20: ffffff80c134d8c0 x19: ffffffc012483b24 [ 7765.126002][ T640] gsensor_icm4260x 3-0068: set sensor poll time to 133ms [ 7765.126399][ T2309] x18: ffffffc012883098 [ 7765.126405][ T2309] x17: 0000000000000001 x16: ffffffffffffffff x15: 0000000000000004 [ 7765.126414][ T2309] x14: ffffffc009f2c980 x13: 0000000000000003 x12: 0000000000000003 [ 7765.126422][ T2309] x11: 0000000000000000 x10: ffffffc009606e28 x9 : 0000000000000000 [ 7765.126430][ T2309] x8 : ffffffc00bd00e20 x7 : 205b5d3639363731 x6 : 0000000000000000 [ 7765.135247][ T2309] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000001001 [ 7765.135950][ T2309] x2 : ffffffc012483b24 x1 : 0000000000000e20 x0 : ffffff80c134d8c0 [ 7765.136651][ T2309] Call trace: [ 7765.136933][ T2309] regmap_mmio_read32le+0x8/0x20 [ 7765.137363][ T2309] _regmap_bus_reg_read+0x28/0x34 [ 7765.137801][ T2309] _regmap_read+0x18c/0x240 [ 7765.138197][ T2309] regmap_update_bits_base+0xb8/0x150 [ 7765.138666][ T2309] dw_hdmi_i2s_audio_disable+0x54/0x64 [ 7765.139148][ T2309] dw_hdmi_qp_audio_disable+0xb4/0xcc [ 7765.139616][ T2309] dw_hdmi_qp_i2s_audio_shutdown+0x14/0x20 [ 7765.140119][ T2309] hdmi_codec_shutdown+0x48/0x70 [ 7765.140548][ T2309] snd_soc_dai_shutdown+0x44/0x58 [ 7765.140984][ T2309] soc_pcm_clean+0xbc/0x1a8 [ 7765.141378][ T2309] soc_pcm_close+0x34/0x54 [ 7765.141760][ T2309] snd_pcm_release_substream+0xbc/0x108 [ 7765.142241][ T2309] snd_pcm_release+0x40/0x9c [ 7765.142643][ T2309] __fput+0x80/0x25c [ 7765.142985][ T2309] ____fput+0x10/0x1c [ 7765.143334][ T2309] task_work_run+0xb4/0xd4 [ 7765.143716][ T2309] do_notify_resume+0x71c/0x2150 [ 7765.144145][ T2309] el0_svc_compat+0x44/0x48 [ 7765.144540][ T2309] el0t_32_sync_handler+0x68/0x8c [ 7765.144977][ T2309] el0t_32_sync+0x168/0x16c Change-Id: Ief2a5ba5633ef8fc445ee5cf3454e0ba79ee6916 Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.