[RFC PATCH v2 5/8] drm/i915: Add support for audio driver notifications

[Jerome Anand <jerome.anand@intel.com>]

Notifiations like mode change, hot plug and edid to
the audio driver are added. This is inturn used by the
audio driver for its functionality.
A new interface file capturing the notifications needed by the
audio driver is added

Signed-off-by: Jerome Anand <jerome.anand@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h        |  3 +++
 drivers/gpu/drm/i915/intel_audio.c     |  8 ++++++
 drivers/gpu/drm/i915/intel_hdmi.c      | 18 ++++++++++++-
 drivers/gpu/drm/i915/intel_lpe_audio.c | 49 ++++++++++++++++++++++++++++++++++
 include/drm/intel_lpe_audio.h          |  1 +
 5 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 399a8ee..51a6d71 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3597,6 +3597,9 @@ int  intel_lpe_audio_setup(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv);
 int intel_lpe_audio_detect(struct drm_i915_private *dev_priv);
+void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
+			void *eld, int port, int tmds_clk_speed,
+			bool connected);
 
 /* intel_i2c.c */
 extern int intel_setup_gmbus(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 9583f43..61a9a98 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -24,6 +24,7 @@
 #include <linux/kernel.h>
 #include <linux/component.h>
 #include <drm/i915_component.h>
+#include <drm/intel_lpe_audio.h>
 #include "intel_drv.h"
 
 #include <drm/drmP.h>
@@ -528,6 +529,10 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
 	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
 		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
 						 (int) port, (int) pipe);
+
+	if (IS_LPE_AUDIO_ENABLED(dev_priv))
+		intel_lpe_audio_notify(dev_priv, connector->eld, port,
+			crtc->config->port_clock, true);
 }
 
 /**
@@ -561,6 +566,9 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
 		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
 						 (int) port, (int) pipe);
+
+	if (IS_LPE_AUDIO_ENABLED(dev_priv))
+		intel_lpe_audio_notify(dev_priv, NULL, port, 0, true);
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 8d46f58..0e20788 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -36,6 +36,7 @@
 #include <drm/drm_edid.h>
 #include "intel_drv.h"
 #include <drm/i915_drm.h>
+#include <drm/intel_lpe_audio.h>
 #include "i915_drv.h"
 
 static struct drm_device *intel_hdmi_to_dev(struct intel_hdmi *intel_hdmi)
@@ -1501,9 +1502,24 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
 
 		hdmi_to_dig_port(intel_hdmi)->base.type = INTEL_OUTPUT_HDMI;
 		status = connector_status_connected;
-	} else
+
+		i915_enable_hdmi_audio_int(dev_priv);
+
+		if (IS_LPE_AUDIO_ENABLED(dev_priv))
+			intel_lpe_audio_notify(dev_priv,
+				connector->eld, 0,
+				0, true);
+	} else {
 		status = connector_status_disconnected;
 
+		i915_disable_hdmi_audio_int(dev_priv);
+
+		if (IS_LPE_AUDIO_ENABLED(dev_priv))
+			intel_lpe_audio_notify(dev_priv,
+				NULL, 0,
+				0, false);
+	}
+
 	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
 
 	return status;
diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c
index acfe22f..28266e4 100644
--- a/drivers/gpu/drm/i915/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
@@ -355,3 +355,52 @@ void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
 
 	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 }
+
+
+/**
+ * intel_lpe_audio_notify() - notify lpe audio event
+ * audio driver and i915
+ * @dev_priv: the i915 drm device private data
+ * @eld : ELD data
+ * @port: port id
+ * @tmds_clk_speed: tmds clock frequency in Hz
+ * @connected: hdmi connected/disconnected
+ *
+ * Notify lpe audio driver of eld change.
+ */
+void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
+			void *eld, int port, int tmds_clk_speed,
+			bool connected)
+{
+	unsigned long irq_flags;
+
+	if (IS_LPE_AUDIO_ENABLED(dev_priv)) {
+		struct intel_hdmi_lpe_audio_pdata *pdata = dev_get_platdata(
+			&(dev_priv->lpe_audio.platdev->dev));
+
+		if (pdata) {
+			spin_lock_irqsave(&pdata->lpe_audio_slock,
+				irq_flags);
+
+			if (eld != NULL) {
+				memcpy(pdata->eld.eld_data, eld,
+					HDMI_MAX_ELD_BYTES);
+				pdata->eld.port_id = port;
+
+				if (tmds_clk_speed)
+					pdata->tmds_clock_speed =
+						tmds_clk_speed;
+			}
+			pdata->hdmi_connected = connected;
+			if (pdata->notify_audio_lpe)
+				pdata->notify_audio_lpe(
+					(eld != NULL) ? &pdata->eld : NULL);
+			else
+				pdata->notify_pending = true;
+
+			spin_unlock_irqrestore(&pdata->lpe_audio_slock,
+				irq_flags);
+		} else
+			DRM_DEBUG_DRIVER("no audio notification\n");
+	}
+}
diff --git a/include/drm/intel_lpe_audio.h b/include/drm/intel_lpe_audio.h
index a64c449..952de05 100644
--- a/include/drm/intel_lpe_audio.h
+++ b/include/drm/intel_lpe_audio.h
@@ -25,6 +25,7 @@
 #define _INTEL_LPE_AUDIO_H_
 
 #include <linux/types.h>
+#include <linux/spinlock_types.h>
 
 #define HDMI_MAX_ELD_BYTES	128
 
-- 
2.9.3
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