[U-Boot] [v4] armv8: ls1028ardb: enable DisplayPort Power support

[Wen He]

Enable DP_PWR signal to power the DP to HDMI converter cable.

Signed-off-by: Wen He <wen.he_1 at nxp.com>
---
 board/freescale/ls1028a/ls1028a.c | 14 ++++++++++++++
 include/configs/ls1028a_common.h  |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/board/freescale/ls1028a/ls1028a.c b/board/freescale/ls1028a/ls1028a.c
index 095971448f..c71ed21e9f 100644
--- a/board/freescale/ls1028a/ls1028a.c
+++ b/board/freescale/ls1028a/ls1028a.c
@@ -83,6 +83,20 @@ int board_init(void)
 		dm_i2c_write(dev, 0x0b, &val, 1);
 #endif
 
+#endif
+
+#if defined(CONFIG_TARGET_LS1028ARDB)
+	u8 reg;
+
+	reg = QIXIS_READ(brdcfg[4]);
+	/*
+	 * Field | Function
+	 * 3     | DisplayPort Power Enable (net DP_PWR_EN):
+	 * DPPWR | 0= DP_PWR is enabled.
+	 */
+	reg &= ~(DP_PWD_EN_DEFAULT_MASK);
+	QIXIS_WRITE(brdcfg[4], reg);
+
 #endif
 	return 0;
 }
diff --git a/include/configs/ls1028a_common.h b/include/configs/ls1028a_common.h
index 40fcd22582..99f5c21689 100644
--- a/include/configs/ls1028a_common.h
+++ b/include/configs/ls1028a_common.h
@@ -192,6 +192,9 @@
 #define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS	3
 #define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS	5
 
+/* DisplayPort */
+#define DP_PWD_EN_DEFAULT_MASK          0x8
+
 #ifdef CONFIG_SECURE_BOOT
 #include <asm/fsl_secure_boot.h>
 #endif
-- 
2.17.1