On Thu, Apr 18, 2019 at 11:09:29AM +0300, Gwan-gyeong Mun wrote: > The hotplug detection routine of drm_helper_hpd_irq_event() can detect > changing of status of connector, but it can not detect changing of > properties of the connector. > e.g. changing of edid while suspend/resume, changing of dp lanes in dp aux. > > Following scenario explains one of them; A detection of changing of edid. > > 1) plug display device to a connector > 2) system suspend > 3) unplug 1)'s display device and plug the other display device to a > connector > 4) system resume > > To solve explained cases, It fires off KMS hotplug events if > drm_helper_probe_detect() says the connector is connected. > > Testcase: igt/kms_chamelium/hdmi-edid-change-during-hibernate > Testcase: igt/kms_chamelium/hdmi-edid-change-during-suspend > Testcase: igt/kms_chamelium/dp-edid-change-during-hibernate > Testcase: igt/kms_chamelium/dp-edid-change-during-suspend > > Suggested-by: Daniel Vetter <daniel.vetter@xxxxxxxx> This isn't at all what I suggested. -Daniel > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx> > Link: https://lists.freedesktop.org/archives/dri-devel/2019-April/214572.html > --- > drivers/gpu/drm/drm_probe_helper.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c > index 6fd08e04b323..081a849104f2 100644 > --- a/drivers/gpu/drm/drm_probe_helper.c > +++ b/drivers/gpu/drm/drm_probe_helper.c > @@ -780,7 +780,8 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) > connector->name, > drm_get_connector_status_name(old_status), > drm_get_connector_status_name(connector->status)); > - if (old_status != connector->status) > + if (old_status != connector->status || > + connector->status == connector_status_connected) > changed = true; > } > drm_connector_list_iter_end(&conn_iter); > -- > 2.21.0 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
