During enable function, the mxsfb driver is trying to associate with a
connector, when a drm_bridge is used. When accessing the connectors
list, mode_config->mutex might be locked, generating the below WARN.
Since we are not changing the mode_config, we can access the
connector_list directly.
[ 16.876991] [<ffff0000086289d4>] mxsfb_pipe_enable+0xec/0xf8
[ 16.882650] [<ffff0000085e4de0>] drm_simple_kms_crtc_enable+0x20/0x30
[ 16.889090] [<ffff0000085e144c>]
drm_atomic_helper_commit_modeset_enables+0x17c/0x1a0
[ 16.896918] [<ffff0000085e42dc>]
drm_atomic_helper_commit_tail+0x3c/0x68
[ 16.903617] [<ffff0000085e436c>] commit_tail+0x64/0x80
[ 16.908753] [<ffff0000085e4398>] commit_work+0x10/0x18
[ 16.913893] [<ffff0000080d4928>] process_one_work+0x1c8/0x380
[ 16.919638] [<ffff0000080d4b28>] worker_thread+0x48/0x498
[ 16.925035] [<ffff0000080da8f8>] kthread+0xe0/0xf8
[ 16.929828] [<ffff000008082e80>] ret_from_fork+0x10/0x50
Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>
01c64ac784