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-rw-r--r--drivers/radeon/radeon.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/radeon/radeon.h b/drivers/radeon/radeon.h
index e1a5e8dc67..03f01ad700 100644
--- a/drivers/radeon/radeon.h
+++ b/drivers/radeon/radeon.h
@@ -625,13 +625,23 @@
#define OV0_P2_X_START_END 0x0498
#define OV0_P3_X_START_END 0x049C
#define OV0_FILTER_CNTL 0x04A0
+/*
+ radeon notes:
+ value 0x0 makes green background only
+ value 0x1 passes only green colors (probably U or V)
+ value 0x2 passes only red colors (probably U or V)
+ value 0x3 makes full colored output
+ value 0x4 ???
+ value 0x8 ???
+ value 0xffffffff doesn't make any visible effects
+*/
#define OV0_FOUR_TAP_COEF_0 0x04B0
#define OV0_FOUR_TAP_COEF_1 0x04B4
#define OV0_FOUR_TAP_COEF_2 0x04B8
#define OV0_FOUR_TAP_COEF_3 0x04BC
#define OV0_FOUR_TAP_COEF_4 0x04C0
-#define OV0_FLAG_CNTL 0x04DC
-#define OV0_COLOUR_CNTL 0x04E0
+#define OV0_FLAG_CNTL 0x04DC /* probably wronly defined for radeons */
+#define OV0_COLOUR_CNTL 0x04E0 /* probably wronly defined for radeons */
#define OV0_VID_KEY_CLR 0x04E4
#define OV0_VID_KEY_MSK 0x04E8
#define OV0_GRAPHICS_KEY_CLR 0x04EC