1 files changed, 13 insertions, 0 deletions
diff --git a/board/ti/am335x/board.h b/board/ti/am335x/board.h
index 9776df7959..48c139a817 100644
--- a/board/ti/am335x/board.h
+++ b/board/ti/am335x/board.h
@@ -11,6 +11,19 @@
 #ifndef _BOARD_H_
 #define _BOARD_H_
 
+/**
+ * AM335X (EMIF_4D) EMIF REG_COS_COUNT_1, REG_COS_COUNT_2, and
+ * REG_PR_OLD_COUNT values to avoid LCDC DMA FIFO underflows and Frame
+ * Synchronization Lost errors. The values are the biggest that work
+ * reliably with offered video modes and the memory subsystem on the
+ * boards. These register have are briefly documented in "7.3.3.5.2
+ * Command Starvation" section of AM335x TRM. The REG_COS_COUNT_1 and
+ * REG_COS_COUNT_2 do not have any effect on current versions of
+ * AM335x.
+ */
+#define EMIF_OCP_CONFIG_BEAGLEBONE_BLACK       0x00141414
+#define EMIF_OCP_CONFIG_AM335X_EVM             0x003d3d3d
+
 static inline int board_is_bone(void)
 {
 	return board_ti_is("A335BONE");