On Wed, Dec 10, 2014 at 06:23:49PM +0100, A H wrote: > 10 gru 2014 17:16 "Russell King - ARM Linux" <linux@xxxxxxxxxxxxxxxx> > napisał(a): > > > > On Wed, Dec 10, 2014 at 04:48:18PM +0100, Andrzej Hajda wrote: > > > 3. There are drivers which can work without specific resource, but if > > > the resource becomes available/unavailable it can do some additional > stuff. > > > An example of such driver is DRM driver (more precisely > drm_connector) - > > > it can start without attached drm_panel, but if the panel becomes > available it > > > can react by generating HPD event and start using it. > > > > Bad example, and actually incorrect. DRM connectors are referenced in > > userspace by an IDR number, which can be re-used in the case of a > > connector appearing, disappearing, and then a different connector > > re-appearing. > > But it is not about reappearing of drm_connector, it is about reappearing > of drm_panel which is fortunately not a part of drm driver. Connector here > is only consumer of drm_panel which should have possibility to receive > notifications on panel (dis-)appearance. Okay, so that's exactly like a panel being "hotplugged" to the connector, which should be fine. -- FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
