hdmirx: report source change on change in AVI infoframe

Currently change in color format which is transmitted through
AVI infoframe is not notified to userspace. Notify now through
source change event.

Signed-off-by: Subhransu S. Prusty <subhransu.sekhar.prusty@xilinx.com>

hdmi/xilinx-hdmi-rx/xv_hdmirxss.c

@@ -863,11 +863,13 @@ static void XV_HdmiRxSs_AuxCallback(void *CallbackRef)
   XV_HdmiRxSs *HdmiRxSsPtr = (XV_HdmiRxSs *)CallbackRef;
   XHdmiC_Aux *AuxPtr;
   XHdmiC_AVI_InfoFrame *AviInfoFramePtr;
+  XHdmiC_AVI_InfoFrame *AviInfoFramePrevPtr;
   XHdmiC_GeneralControlPacket *GeneralControlPacketPtr;
   XHdmiC_AudioInfoFrame *AudioInfoFramePtr;
   struct v4l2_hdr10_payload *DrmInfoFramePtr;
 
   AviInfoFramePtr = XV_HdmiRxSs_GetAviInfoframe(HdmiRxSsPtr);
+  AviInfoFramePrevPtr = XV_HdmiRxSs_GetAviInfoframePrev(HdmiRxSsPtr);
   GeneralControlPacketPtr = XV_HdmiRxSs_GetGCP(HdmiRxSsPtr);
   AudioInfoFramePtr = XV_HdmiRxSs_GetAudioInfoframe(HdmiRxSsPtr);
   DrmInfoFramePtr = XV_HdmiRxSs_GetDrmInfoframe(HdmiRxSsPtr);
@@ -877,10 +879,18 @@ static void XV_HdmiRxSs_AuxCallback(void *CallbackRef)
 	  // Retrieve Vendor Specific Info Frame
 	  XV_HdmiRxSs_RetrieveVSInfoframe(HdmiRxSsPtr);
   } else if(AuxPtr->Header.Byte[0] == AUX_AVI_INFOFRAME_TYPE){
+
 	  // Reset Avi InfoFrame
 	  (void)memset((void *)AviInfoFramePtr, 0, sizeof(XHdmiC_AVI_InfoFrame));
 	  // Parse Aux to retrieve Avi InfoFrame
 	  XV_HdmiC_ParseAVIInfoFrame(AuxPtr, AviInfoFramePtr);
+	  if (memcmp(AviInfoFramePrevPtr, AviInfoFramePtr,
+				  sizeof(XHdmiC_AVI_InfoFrame))) {
+		memcpy(AviInfoFramePrevPtr, AviInfoFramePtr,
+				  sizeof(XHdmiC_AVI_InfoFrame));
+		HdmiRxSsPtr->AVIInfoChanged = true;
+	  }
+
 	  HdmiRxSsPtr->HdmiRxPtr->Stream.Video.ColorFormatId =
 	  			XV_HdmiRx_GetAviColorSpace(HdmiRxSsPtr->HdmiRxPtr);
 	  HdmiRxSsPtr->HdmiRxPtr->Stream.Vic =
@@ -1706,6 +1716,21 @@ XHdmiC_AVI_InfoFrame *XV_HdmiRxSs_GetAviInfoframe(XV_HdmiRxSs *InstancePtr)
     return (&(InstancePtr->AVIInfoframe));
 }
 
+XHdmiC_AVI_InfoFrame *XV_HdmiRxSs_GetAviInfoframePrev(XV_HdmiRxSs *InstancePtr)
+{
+    return (&(InstancePtr->AVIInfoframePrev));
+}
+
+/* Clear on read */
+bool IsAVIInfoFrameChanged(XV_HdmiRxSs *InstancePtr) {
+	bool status = false;
+
+	status = InstancePtr->AVIInfoChanged;
+	InstancePtr->AVIInfoChanged = false;
+
+	return status;
+}
+
 /*****************************************************************************/
 /**
 *

hdmi/xilinx-hdmi-rx/xv_hdmirxss.h

@@ -446,6 +446,8 @@ typedef struct
   u8 TMDSClockRatio;            /**< HDMI RX TMDS clock ratio */
 
   XHdmiC_AVI_InfoFrame AVIInfoframe;	/**< AVI InfoFrame */
+  XHdmiC_AVI_InfoFrame AVIInfoframePrev;	/**< AVI InfoFrame */
+  bool AVIInfoChanged;
   XHdmiC_GeneralControlPacket GCP;		/**< General Control Packet */
   XHdmiC_AudioInfoFrame AudioInfoframe;	/**< Audio InfoFrame */
   XHdmiC_VSIF VSIF;						/**< Vendor Specific InfoFrame */
@@ -510,6 +512,8 @@ void XV_HdmiRxSs_SetHpd(XV_HdmiRxSs *InstancePtr, u8 Value);
 void XV_HdmiRxSs_ToggleHpd(XV_HdmiRxSs *InstancePtr);
 XHdmiC_Aux *XV_HdmiRxSs_GetAuxiliary(XV_HdmiRxSs *InstancePtr);
 XHdmiC_AVI_InfoFrame *XV_HdmiRxSs_GetAviInfoframe(XV_HdmiRxSs *InstancePtr);
+XHdmiC_AVI_InfoFrame *XV_HdmiRxSs_GetAviInfoframePrev(XV_HdmiRxSs *InstancePtr);
+bool IsAVIInfoFrameChanged(XV_HdmiRxSs *InstancePtr);
 XHdmiC_AudioInfoFrame *XV_HdmiRxSs_GetAudioInfoframe(XV_HdmiRxSs *InstancePtr);
 struct v4l2_hdr10_payload *XV_HdmiRxSs_GetDrmInfoframe(XV_HdmiRxSs *InstancePtr);
 XHdmiC_VSIF *XV_HdmiRxSs_GetVSIF(XV_HdmiRxSs *InstancePtr);

hdmi/xilinx-hdmirx.c

@@ -1233,6 +1233,8 @@ static void RxAuxCallback(void *CallbackRef)
 	XV_HdmiRxSs *HdmiRxSsPtr = &xhdmi->xv_hdmirxss;
 	XHdmiC_Aux *AuxPtr;
 	XHdmiC_Aux AuxFifo;
+	bool AviInfoFrameChangeStatus = false;
+	unsigned long flags;
 
 	AuxPtr = XV_HdmiRxSs_GetAuxiliary(HdmiRxSsPtr);
 
@@ -1243,6 +1245,15 @@ static void RxAuxCallback(void *CallbackRef)
 	if (AuxPtr->Header.Byte[0] != AUX_GENERAL_CONTROL_PACKET_TYPE) {
 		memcpy(&AuxFifo, AuxPtr, sizeof(XHdmiC_Aux));
 	}
+
+	spin_lock_irqsave(&xhdmi->irq_lock, flags);
+	AviInfoFrameChangeStatus = IsAVIInfoFrameChanged(HdmiRxSsPtr);
+	spin_unlock_irqrestore(&xhdmi->irq_lock, flags);
+
+	if (AviInfoFrameChangeStatus &&
+			XV_HdmiRxSs_IsStreamUp(HdmiRxSsPtr)) {
+		RxStreamUpCallback(CallbackRef);
+	}
 	//ToDO: Insert registered ALSA driver callback
 }