diff options
| author |   Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> | 2017-10-03 17:22:11 +0300 |
|---|---|---|
| committer |   Jani Nikula <jani.nikula@intel.com> | 2017-10-05 08:38:17 +0300 |
| commit | 5ea2355a100a3c6304901d058aee06d3a6be69bc (patch) | |
| tree | e85c57fc1d8e15cbdd7f170b0b3612b9520e5ea5 /drivers/gpu/drm/i915/intel_ddi.c | |
| parent | drm/i915/scheduler: Support user-defined priorities (diff) | |
| download | linux-dev-5ea2355a100a3c6304901d058aee06d3a6be69bc.tar.xz linux-dev-5ea2355a100a3c6304901d058aee06d3a6be69bc.zip | |
drm/i915/mst: Use MST sideband message transactions for dpms control
Use the POWER_DOWN_PHY and POWER_UP_PHY sideband message transactions to
set power states for downstream sinks. Apart from giving us the ability
to set power state for individual sinks, this fixes the below test for
me.
$ xrandr --display :0 --output DP-2-2-8 --off
$ xrandr --display :0 --output DP-2-2-1 --off
$ xrandr --display :0 --output DP-2-2-8 --auto #Black screen
$ xrandr --display :0 --output DP-2-2-1 --auto
v2: Modify and document the dpms and port disable order (Ville)
Add comment explaining is_mst = !crtc_state equivalence(Ville, Maarten)
v3 by Jani: rebase
References: https://bugs.freedesktop.org/show_bug.cgi?id=90963
References: https://bugs.freedesktop.org/show_bug.cgi?id=88124
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Lyude <lyude@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171003142211.860-1-jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ddi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 65f4b6786791..511aa60e0176 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -2162,7 +2162,8 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder, intel_prepare_dp_ddi_buffers(encoder); intel_ddi_init_dp_buf_reg(encoder); - intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); + if (!link_mst) + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); intel_dp_start_link_train(intel_dp); if (port != PORT_A || INTEL_GEN(dev_priv) >= 9) intel_dp_stop_link_train(intel_dp); @@ -2236,12 +2237,21 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder, uint32_t val; bool wait = false; - /* old_crtc_state and old_conn_state are NULL when called from DP_MST */ - if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) { + /* + * old_crtc_state and old_conn_state are NULL when called from + * DP_MST. The main connector associated with this port is never + * bound to a crtc for MST. + */ + bool is_mst = !old_crtc_state; struct intel_dp *intel_dp = enc_to_intel_dp(encoder); - intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); + /* + * Power down sink before disabling the port, otherwise we end + * up getting interrupts from the sink on detecting link loss. + */ + if (!is_mst) + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); } val = I915_READ(DDI_BUF_CTL(port)); |