[PATCH 3/7]implement detailed timing unified interface in interpret_edid.

[Ma Ling]

create unified interface for detail timing operation. 

---
 hw/xfree86/ddc/interpret_edid.c |   64 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/hw/xfree86/ddc/interpret_edid.c b/hw/xfree86/ddc/interpret_edid.c
index 0438449..2002cd5 100644
--- a/hw/xfree86/ddc/interpret_edid.c
+++ b/hw/xfree86/ddc/interpret_edid.c
@@ -95,6 +95,70 @@ handle_edid_quirks(xf86MonPtr m)
     }
 }
 
+static int get_cea_detail_timing(Uchar *blk, xf86MonPtr mon,
+                                 struct detailed_monitor_section *det_mon)
+{
+    int dt_num;
+    int dt_offset = ((struct cea_ext_body *)blk)->dt_offset;
+
+    dt_num = 0;
+
+    if (dt_offset < CEA_EXT_MIN_DATA_OFFSET)
+        return dt_num;
+
+    for (; dt_offset < (CEA_EXT_MAX_DATA_OFFSET - DET_TIMING_INFO_LEN) &&
+           dt_num < CEA_EXT_DET_TIMING_NUM;
+	   _NEXT_DT_MD_SECTION(dt_offset)) {
+
+        fetch_detailed_block(blk + dt_offset, &mon->ver, det_mon + dt_num);  
+        dt_num = dt_num + 1 ;
+    }
+
+    return dt_num;
+}
+
+static void handle_cea_detail_block(Uchar *ext, xf86MonPtr mon,
+                                    handle_detailed_fn fn,
+                                    void *data)
+{
+    int i;
+    struct detailed_monitor_section det_mon[CEA_EXT_DET_TIMING_NUM];
+    int det_mon_num;
+
+    det_mon_num = get_cea_detail_timing(ext, mon, det_mon);
+
+    for (i = 0; i < det_mon_num; i++)
+        fn(det_mon + i, data); 
+}
+
+void xf86ForEachDetailedBlock(xf86MonPtr mon,
+                              handle_detailed_fn fn,
+                              void *data)
+{
+    int i;
+    Uchar *ext;
+
+    if (mon == NULL)
+        return;
+
+    for (i = 0; i < DET_TIMINGS; i++)
+        fn(mon->det_mon + i, data);
+    
+    for (i = 0; i < mon->no_sections; i++) {
+        ext = mon->rawData + EDID1_LEN * (i + 1);
+        switch (ext[EXT_TAG]){
+        case CEA_EXT:
+            handle_cea_detail_block(ext, mon, fn, data);
+            break;
+        case VTB_EXT:
+        case DI_EXT:
+        case LS_EXT:
+        case MI_EXT:
+	    break;
+        }
+    }
+}
+
 struct det_hv_parameter {
     int real_hsize;
     int real_vsize;
-- 
1.5.4.4