[PATCH 3/3] drm/i915: Fix POWER_DOMAIN_AUDIO refcounting.

[Maarten Lankhorst]

If the crtc was brought up with audio before the driver loads,
then crtc_disable will remove a refcount to audio that doesn't exist
before.

Fortunately we already set power domains on readout, so we can just add
the power domain handling to get_crtc_power_domains, which will update
the power domains correctly in all cases.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c     | 14 ++------------
 drivers/gpu/drm/i915/intel_display.c |  4 ++++
 drivers/gpu/drm/i915/intel_dp_mst.c  |  9 ++-------
 3 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index d808a2ccc29e..8c9ce850760b 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1835,8 +1835,6 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder,
 			     struct drm_connector_state *conn_state)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
-	struct drm_crtc *crtc = encoder->crtc;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct drm_i915_private *dev_priv = to_i915(encoder->dev);
 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
 	int type = intel_encoder->type;
@@ -1863,10 +1861,8 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder,
 		intel_edp_drrs_enable(intel_dp, pipe_config);
 	}
 
-	if (intel_crtc->config->has_audio) {
-		intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
+	if (pipe_config->has_audio)
 		intel_audio_codec_enable(intel_encoder, pipe_config, conn_state);
-	}
 }
 
 static void intel_disable_ddi(struct intel_encoder *intel_encoder,
@@ -1874,16 +1870,10 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder,
 			      struct drm_connector_state *old_conn_state)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
-	struct drm_crtc *crtc = encoder->crtc;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int type = intel_encoder->type;
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
 
-	if (intel_crtc->config->has_audio) {
+	if (old_crtc_state->has_audio)
 		intel_audio_codec_disable(intel_encoder);
-		intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
-	}
 
 	if (type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ac587ca3b2af..0daa54633450 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5735,6 +5735,7 @@ static unsigned long get_crtc_power_domains(struct drm_crtc *crtc,
 					    struct intel_crtc_state *crtc_state)
 {
 	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct drm_encoder *encoder;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	enum pipe pipe = intel_crtc->pipe;
@@ -5756,6 +5757,9 @@ static unsigned long get_crtc_power_domains(struct drm_crtc *crtc,
 		mask |= BIT(intel_display_port_power_domain(intel_encoder));
 	}
 
+	if (HAS_DDI(dev_priv) && crtc_state->has_audio)
+		mask |= BIT(POWER_DOMAIN_AUDIO);
+
 	if (crtc_state->shared_dpll)
 		mask |= BIT(POWER_DOMAIN_PLLS);
 
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 205fe4748ec5..6c5382494fee 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -87,7 +87,6 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct intel_connector *connector =
 		to_intel_connector(old_conn_state->connector);
-	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	int ret;
 
 	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
@@ -98,10 +97,8 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
 	if (ret) {
 		DRM_ERROR("failed to update payload %d\n", ret);
 	}
-	if (old_crtc_state->has_audio) {
+	if (old_crtc_state->has_audio)
 		intel_audio_codec_disable(encoder);
-		intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
-	}
 }
 
 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
@@ -214,10 +211,8 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder,
 	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
 
 	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
-	if (pipe_config->has_audio) {
-		intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
+	if (pipe_config->has_audio)
 		intel_audio_codec_enable(encoder, pipe_config, conn_state);
-	}
 }
 
 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
-- 
2.7.4