On Tue, Oct 06, 2020 at 09:58:08PM +0300, Ville Syrjala wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > LSPCON requires HPD detection logic to be enabled when we call > its .reset() hook during resume, to check the live state of the > pin. To that end let's reorder the resume sequence such that > we do HPD init before the encoder reset. > > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/i915/i915_drv.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c > index b2a050d916e3..66ddd4161885 100644 > --- a/drivers/gpu/drm/i915/i915_drv.c > +++ b/drivers/gpu/drm/i915/i915_drv.c > @@ -1213,21 +1213,20 @@ static int i915_drm_resume(struct drm_device *dev) > * GPU will hang. i915_gem_init_hw() will initiate batches to > * update/restore the context. > * > - * drm_mode_config_reset() needs AUX interrupts. > - * > * Modeset enabling in intel_modeset_init_hw() also needs working > * interrupts. > */ > intel_runtime_pm_enable_interrupts(dev_priv); > > - drm_mode_config_reset(dev); > - > i915_gem_resume(dev_priv); > > intel_modeset_init_hw(dev_priv); > intel_init_clock_gating(dev_priv); > intel_hpd_init(dev_priv); > > + /* May need AUX interrupts and HPD detection enabled */ > + drm_mode_config_reset(dev); lspcon_resume() could be called both by the above and during connector detection. Delaying hotplug detection until after intel_display_resume() would be the ideal solution, but until that we could avoid this race by taking connection_mutex. > + > /* MST sideband requires HPD interrupts enabled */ > intel_dp_mst_resume(dev_priv); > intel_display_resume(dev); > -- > 2.26.2 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
