[PATCH 0/3] omapdrm: Fix runtime PM issues at module load and unload time

[Tony Lindgren]

Hi,

* Laurent Pinchart <laurent.pinchart at ideasonboard.com> [181101 12:13]:
> On Thursday, 1 November 2018 13:47:40 EET Tomi Valkeinen wrote:
> > We do dispc_runtime_get/put in the HDMI driver's suspend/resume too, so
> > don't we need similar hack (as you add in dsi.c) there also?
> 
> We would if we had to access HDMI registers at probe time.

With these I'm still seeing the following issue with hdmi on rmmod
of omapdrm related modules as hdmi->dss is NULL in hdmi_runtime_resume.

Regards,

Tony

8< ------
Unable to handle kernel NULL pointer dereference at virtual address 00000278
...
PC is at hdmi_runtime_resume+0xc/0x1c [omapdss]
LR is at __rpm_callback+0x144/0x1d8
...
(hdmi_runtime_resume [omapdss]) from [<c06079b4>] (__rpm_callback+0x144/0x1d8)
(__rpm_callback) from [<c0607a68>] (rpm_callback+0x20/0x80)
(rpm_callback) from [<c06075f0>] (rpm_resume+0x60c/0x828)
(rpm_resume) from [<c0607858>] (__pm_runtime_resume+0x4c/0x64)
(__pm_runtime_resume) from [<c05fc7ec>] (device_release_driver_internal+0x130/0x234)
(device_release_driver_internal) from [<c05fc934>] (driver_detach+0x38/0x6c)
(driver_detach) from [<c05fb698>] (bus_remove_driver+0x4c/0xa4)
(bus_remove_driver) from [<c05fe23c>] (platform_unregister_drivers+0x20/0x2c)
(platform_unregister_drivers) from [<c01f0fe0>] (sys_delete_module+0x1c0/0x230)
(sys_delete_module) from [<c0101000>] (ret_fast_syscall+0x0/0x28)