[Intel-gfx] [PATCH] drm/i915: Fix VLV/CHV HDMI/DP audio enable

[Ville Syrjala]

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

Despite what I claimed in commit c3c5dc1d9224
("drm/i915/audio: Do the vblank waits") the vblank
interrupts are in fact not enabled yet when we do the
audio enable sequence on VLV/CHV (all other platforms are
fine).

Reorder the enable sequence on VLV/CHV to match that of the
other platforms so that the audio enable happens after the
pipe has been enabled.

Fixes: c3c5dc1d9224 ("drm/i915/audio: Do the vblank waits")
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/g4x_dp.c   |  4 +--
 drivers/gpu/drm/i915/display/g4x_hdmi.c | 41 ++++++++++++++++---------
 2 files changed, 29 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/g4x_dp.c b/drivers/gpu/drm/i915/display/g4x_dp.c
index 3593938dcd87..24ef36ec2d3d 100644
--- a/drivers/gpu/drm/i915/display/g4x_dp.c
+++ b/drivers/gpu/drm/i915/display/g4x_dp.c
@@ -673,8 +673,6 @@ static void intel_enable_dp(struct intel_atomic_state *state,
 	intel_dp_pcon_dsc_configure(intel_dp, pipe_config);
 	intel_dp_start_link_train(intel_dp, pipe_config);
 	intel_dp_stop_link_train(intel_dp, pipe_config);
-
-	intel_audio_codec_enable(encoder, pipe_config, conn_state);
 }
 
 static void g4x_enable_dp(struct intel_atomic_state *state,
@@ -683,6 +681,7 @@ static void g4x_enable_dp(struct intel_atomic_state *state,
 			  const struct drm_connector_state *conn_state)
 {
 	intel_enable_dp(state, encoder, pipe_config, conn_state);
+	intel_audio_codec_enable(encoder, pipe_config, conn_state);
 	intel_edp_backlight_on(pipe_config, conn_state);
 }
 
@@ -691,6 +690,7 @@ static void vlv_enable_dp(struct intel_atomic_state *state,
 			  const struct intel_crtc_state *pipe_config,
 			  const struct drm_connector_state *conn_state)
 {
+	intel_audio_codec_enable(encoder, pipe_config, conn_state);
 	intel_edp_backlight_on(pipe_config, conn_state);
 }
 
diff --git a/drivers/gpu/drm/i915/display/g4x_hdmi.c b/drivers/gpu/drm/i915/display/g4x_hdmi.c
index 121caeaa409b..c3580d96765c 100644
--- a/drivers/gpu/drm/i915/display/g4x_hdmi.c
+++ b/drivers/gpu/drm/i915/display/g4x_hdmi.c
@@ -157,24 +157,32 @@ static void intel_hdmi_get_config(struct intel_encoder *encoder,
 			     &pipe_config->infoframes.hdmi);
 }
 
+static void g4x_hdmi_enable_port(struct intel_encoder *encoder,
+				 const struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+	u32 temp;
+
+	temp = intel_de_read(dev_priv, intel_hdmi->hdmi_reg);
+
+	temp |= SDVO_ENABLE;
+	if (pipe_config->has_audio)
+		temp |= HDMI_AUDIO_ENABLE;
+
+	intel_de_write(dev_priv, intel_hdmi->hdmi_reg, temp);
+	intel_de_posting_read(dev_priv, intel_hdmi->hdmi_reg);
+}
+
 static void g4x_enable_hdmi(struct intel_atomic_state *state,
 			    struct intel_encoder *encoder,
 			    const struct intel_crtc_state *pipe_config,
 			    const struct drm_connector_state *conn_state)
 {
-	struct drm_device *dev = encoder->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
-	u32 temp;
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 
-	temp = intel_de_read(dev_priv, intel_hdmi->hdmi_reg);
-
-	temp |= SDVO_ENABLE;
-	if (pipe_config->has_audio)
-		temp |= HDMI_AUDIO_ENABLE;
-
-	intel_de_write(dev_priv, intel_hdmi->hdmi_reg, temp);
-	intel_de_posting_read(dev_priv, intel_hdmi->hdmi_reg);
+	g4x_hdmi_enable_port(encoder, pipe_config);
 
 	drm_WARN_ON(&dev_priv->drm, pipe_config->has_audio &&
 		    !pipe_config->has_hdmi_sink);
@@ -294,6 +302,11 @@ static void vlv_enable_hdmi(struct intel_atomic_state *state,
 			    const struct intel_crtc_state *pipe_config,
 			    const struct drm_connector_state *conn_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	drm_WARN_ON(&dev_priv->drm, pipe_config->has_audio &&
+		    !pipe_config->has_hdmi_sink);
+	intel_audio_codec_enable(encoder, pipe_config, conn_state);
 }
 
 static void intel_disable_hdmi(struct intel_atomic_state *state,
@@ -415,7 +428,7 @@ static void vlv_hdmi_pre_enable(struct intel_atomic_state *state,
 			      pipe_config->has_infoframe,
 			      pipe_config, conn_state);
 
-	g4x_enable_hdmi(state, encoder, pipe_config, conn_state);
+	g4x_hdmi_enable_port(encoder, pipe_config);
 
 	vlv_wait_port_ready(dev_priv, dig_port, 0x0);
 }
@@ -492,7 +505,7 @@ static void chv_hdmi_pre_enable(struct intel_atomic_state *state,
 			      pipe_config->has_infoframe,
 			      pipe_config, conn_state);
 
-	g4x_enable_hdmi(state, encoder, pipe_config, conn_state);
+	g4x_hdmi_enable_port(encoder, pipe_config);
 
 	vlv_wait_port_ready(dev_priv, dig_port, 0x0);
 
-- 
2.37.4