Remove ReadEDID command. Extend Service_DisplayChanged response

Detail:
ReadEDID command removed. New subreason code added to reason code 0
of Service_DisplayChanged to oblige ScrModes to load the EDID based
modes it discovered. Required because current behaviour would ignore
any EDID based modes once a LoadModeFile command had been issued.
Admin:
Tested on iMx6

Version 0.64. Tagged as 'ScrModes-0_64'

VersionNum

-/* (0.62)
+/* (0.64)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        0.62
+#define Module_MajorVersion_CMHG        0.64
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                12 Mar 2017
+#define Module_Date_CMHG                01 May 2017
 
-#define Module_MajorVersion             "0.62"
-#define Module_Version                  62
+#define Module_MajorVersion             "0.64"
+#define Module_Version                  64
 #define Module_MinorVersion             ""
-#define Module_Date                     "12 Mar 2017"
+#define Module_Date                     "01 May 2017"
 
-#define Module_ApplicationDate          "12-Mar-17"
+#define Module_ApplicationDate          "01-May-17"
 
 #define Module_ComponentName            "ScrModes"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Video/UserI/ScrModes"
 
-#define Module_FullVersion              "0.62"
-#define Module_HelpVersion              "0.62 (12 Mar 2017)"
-#define Module_LibraryVersionInfo       "0:62"
+#define Module_FullVersion              "0.64"
+#define Module_HelpVersion              "0.64 (01 May 2017)"
+#define Module_LibraryVersionInfo       "0:64"

c/ScrModes

@@ -1192,8 +1192,10 @@ static void service_displaychanged(_kernel_swi_regs *regs)
              *    call chain, so Display Manager et al can't enumerate the modes
              *    with OS_ScreenMode 2. This is only a problem for developers, who
              *    can manually re-read it (standalone builds are only partly supported today).
-             */
-            readedid(regs->r[2], using_edid);
+            */
+            /* added new reason code of 1 to indicate reset to edid based definitions
+            */
+            readedid(regs->r[2], regs->r[3]==1?true:false);
             break;
     }
 }
@@ -1474,10 +1476,6 @@ _kernel_oserror *ScreenModes_cmdhandler(const char *arg_string, int argc, int cm
         case CMD_SaveModeFile:
             result = savemodefile(arg_string);
             break;
-        case CMD_ReadEDID:
-            if(argc > 1) sscanf(arg_string,"%1d",&display);
-            result = readedid(display, true);
-            break;
         default:
             return NULL;
     }

cmhg/ScrModesv

@@ -45,10 +45,7 @@ command-keyword-table: ScreenModes_cmdhandler
                   help-text: "HSMDLMF"),
      SaveModeFile(min-args:1, max-args: 1, international:,
                   invalid-syntax: "SSMDSMF",
-                  help-text: "HSMDSMF"),
-     ReadEDID(min-args:0,max-args:1, international:,
-                  invalid-syntax: "SSMDRED",
-                  help-text: "HSMDRED")
+                  help-text: "HSMDSMF")
 
 swi-chunk-base-number: 0x487C0