[RFC PATCH v4 2/7] 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: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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      |  1 +
 drivers/gpu/drm/i915/intel_lpe_audio.c | 46 ++++++++++++++++++++++++++++++++++
 include/drm/intel_lpe_audio.h          |  1 +
 5 files changed, 59 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2a79048..33bc44c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3561,6 +3561,9 @@ 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);
 bool 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 1c509f7..55a6831 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>
@@ -627,6 +628,10 @@ 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 (HAS_LPE_AUDIO(dev_priv))
+		intel_lpe_audio_notify(dev_priv, connector->eld, port,
+			crtc_state->port_clock, true);
 }
 
 /**
@@ -660,6 +665,9 @@ 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 (HAS_LPE_AUDIO(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 fb88e32..02d50e3 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)
diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c
index e12e5f7..a141a9c 100644
--- a/drivers/gpu/drm/i915/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
@@ -361,3 +361,49 @@ 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 (HAS_LPE_AUDIO(dev_priv)) {
+		struct intel_hdmi_lpe_audio_pdata *pdata = dev_get_platdata(
+			&(dev_priv->lpe_audio.platdev->dev));
+
+		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);
+	}
+}
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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