[Intel-gfx] [PATCH 29/29] drm/i915: Pass a crtc state to ddi post_disable from MST code

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Pass an old crtc state to intel_ddi_post_disable() from the MST code.

Note that this crtc state won't necessaitly match the one that was
passed to intel_ddi_pre_enable() if the first stream to be enabled isn't
the last stream to be disabled. But this is fine since the states should
be identical in every important way. This does mean people frobbing
the DDI pre_enable/post_disable hooks have to pay attention in what
parts of the state they consult.

The alternative would be to inline the relevant code into the MST code.
That is actually what we used to do for pre_enable before
commit e081c8463ac9 ("drm/i915: Remove duplicate DDI enabling logic
from MST path"). For post_disable we've always called the DDI hook.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c    | 4 +---
 drivers/gpu/drm/i915/intel_dp_mst.c | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 672ce1356545..5d043a320f99 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2290,9 +2290,7 @@ static void intel_ddi_post_disable(struct intel_encoder *encoder,
 				   const struct intel_crtc_state *old_crtc_state,
 				   const struct drm_connector_state *old_conn_state)
 {
-	/* old_crtc_state and old_conn_state are NULL when called from DP_MST */
-	if (old_crtc_state &&
-	    intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI))
+	if (intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI))
 		intel_ddi_post_disable_hdmi(encoder,
 					    old_crtc_state, old_conn_state);
 	else
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 8e3aad0ea60b..cb01d0dc46cd 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -169,7 +169,7 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 	intel_mst->connector = NULL;
 	if (intel_dp->active_mst_links == 0) {
 		intel_dig_port->base.post_disable(&intel_dig_port->base,
-						  NULL, NULL);
+						  old_crtc_state, NULL);
 
 		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 	}
-- 
2.13.5