Add crtc unlock method

1 files changed, 14 insertions, 0 deletions

diff --git a/radeontool.c b/radeontool.c
index d6151d2..b7bf515 100644
--- a/radeontool.c
+++ b/radeontool.c
@@ -130,6 +130,7 @@ static void usage(void)
     printf("         regset <pattern> <value> - set registers matching wildcard pattern\n");
     printf("\n");
     printf("         owner <value>      - set cr44 to some value (0 (head a), 3 (head b), or 4 (both) suggested)\n");
+    printf("         unlock             - unlock vga crtcs for r/w access\n");
     exit(-1);
 }
 
@@ -226,6 +227,15 @@ void set_crtc_owner(int owner)
   }
 }
 
+void lock_vga_crtc(int lock)
+{
+  int lockval = lock ? 0x99 : 0x57;
+
+  set_vga_crtc_reg(0, NV_CIO_SR_LOCK_INDEX, lockval);
+  if (arch == 0x11 && !(radeon_get32(NV_PBUS_DEBUG_1, "NV_PBUS_DEBUG_1") & (1 << 28)))
+    set_vga_crtc_reg(1, NV_CIO_SR_LOCK_INDEX, lockval);
+}
+
 void dump_vga_regs(int crtc)
 {
   int i;
@@ -576,6 +586,10 @@ int main(int argc,char *argv[])
             radeon_cmd_regs();
             return 0;
         };
+	if(strcmp(argv[1],"unlock") == 0) {
+            lock_vga_crtc(0);
+            return 0;
+        };
     } else if(argc == 3) {
         if(strcmp(argv[1],"regmatch") == 0) {
             radeon_reg_match(argv[2]);