| Message ID | 20170228072113.21530-1-ander.conselvan.de.oliveira@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Feb 28, 2017 at 09:21:12AM +0200, Ander Conselvan de Oliveira wrote: > Commit 62b695662a24 ("drm/i915: Only enable DDI IO power domains after > enabling DPLL") changed how the DDI IO power domains get enabled, but > neglected the need to enable those domains when enabling a DP connector > with MST enabled, leading to > > Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler > > Fixes: 62b695662a24 ("drm/i915: Only enable DDI IO power domains after enabling DPLL") > Cc: David Weinehall <david.weinehall@linux.intel.com> > Cc: Imre Deak <imre.deak@intel.com> > Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> > Cc: David Weinehall <david.weinehall@linux.intel.com> > Cc: Daniel Vetter <daniel.vetter@intel.com> > Cc: Jani Nikula <jani.nikula@linux.intel.com> > Cc: intel-gfx@lists.freedesktop.org > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> > Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> > --- > drivers/gpu/drm/i915/intel_dp_mst.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c > index d94fd4b..a8334e1 100644 > --- a/drivers/gpu/drm/i915/intel_dp_mst.c > +++ b/drivers/gpu/drm/i915/intel_dp_mst.c > @@ -163,6 +163,9 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, > intel_ddi_clk_select(&intel_dig_port->base, > pipe_config->shared_dpll); > > + intel_display_power_get(dev_priv, > + intel_dig_port->ddi_io_power_domain); > + > intel_prepare_dp_ddi_buffers(&intel_dig_port->base); > intel_dp_set_link_params(intel_dp, > pipe_config->port_clock, > -- > 2.9.3 >
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index d94fd4b..a8334e1 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -163,6 +163,9 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, intel_ddi_clk_select(&intel_dig_port->base, pipe_config->shared_dpll); + intel_display_power_get(dev_priv, + intel_dig_port->ddi_io_power_domain); + intel_prepare_dp_ddi_buffers(&intel_dig_port->base); intel_dp_set_link_params(intel_dp, pipe_config->port_clock,
Commit 62b695662a24 ("drm/i915: Only enable DDI IO power domains after enabling DPLL") changed how the DDI IO power domains get enabled, but neglected the need to enable those domains when enabling a DP connector with MST enabled, leading to Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler Fixes: 62b695662a24 ("drm/i915: Only enable DDI IO power domains after enabling DPLL") Cc: David Weinehall <david.weinehall@linux.intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Cc: David Weinehall <david.weinehall@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: intel-gfx@lists.freedesktop.org Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> --- drivers/gpu/drm/i915/intel_dp_mst.c | 3 +++ 1 file changed, 3 insertions(+)