Hi Daniel, On Tuesday 13 Dec 2016 22:01:36 Daniel Vetter wrote: > On Tue, Dec 13, 2016 at 07:19:15PM +0200, Laurent Pinchart wrote: > > On Tuesday 13 Dec 2016 18:11:34 Daniel Vetter wrote: > >> On Tue, Dec 13, 2016 at 02:59:48PM +0200, Laurent Pinchart wrote: > >>> From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > >>> > >>> The drm driver .load() operation is prone to race conditions as it > >>> initializes the driver after registering the device nodes. Its usage > >>> is deprecated, inline it in the probe function and call > >>> drm_dev_alloc() and drm_dev_register() explicitly. > >>> > >>> For consistency inline the .unload() handler in the remove function as > >>> well. > >>> > >>> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > >>> Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx> > >>> --- > >>> Changes since v1: > >>> > >>> - Removed manual the drm_connector_register() that caused > >>> sysfs-related warnings > >> > >> Hm, what did go boom there? We should catch multiple calls to > >> drm_connector_register ... > > > > Trying to register the connector before the DRM device is registered makes > > sysfs unhappy due to the lack of a parent. > > Autch. I think for i915 we're safe though - our trouble is that mst > hotplug starts to happen before we call drm_dev_register (but it's still > safe there already), because atm the initial topology detection works out > to be async. But we already have the drm_device at least initialized, > which I guess with DT and probe-defer isn't guaranteed. > > Or does this even go boom if you just register a child before the parent? I think it does, but I haven't investigated this any further. Given that we have support for auto-registration of connectors at drm_device registration time, and that I don't need to register connectors later, I just went the easy way. For connectors that can be registered at any time, something more elaborate is likely needed. > >>> drivers/gpu/drm/shmobile/shmob_drm_crtc.c | 7 +- > >>> drivers/gpu/drm/shmobile/shmob_drm_drv.c | 206 ++++++++++------------- > >>> 2 files changed, 104 insertions(+), 109 deletions(-) -- Regards, Laurent Pinchart
