powerpc/t1042RDB: Add Video - HDMI support
T1042 has internal display interface unit (DIU) for driving video.
T1042RDB supports video mode via
-LCD using TI enconder
-HDMI type interface via HDMI encoder
Chrontel, CH7301C encoder which is I2C programmable is used
as HDMI connector on T1042RDB.
This patch add support to
-enable Video interface for T1042RDB
-route qixis multiplexing to enable DIU-HDMI interface on board
-program DIU pixel clock gerenartor for T1042
-program HDMI encoder via I2C on board
This patch refer to the upstream diu patch
(337b0c52b3296f371d04aef71a833e09110e0e6b) for T1040qds.
Signed-off-by: Jason Jin <Jason.Jin@freescale.com>
Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
[York Sun: resolve conflict and move changes to T104xRDB.h]
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/t104xrdb/diu.c b/board/freescale/t104xrdb/diu.c
new file mode 100644
index 0000000..3285bef
--- /dev/null
+++ b/board/freescale/t104xrdb/diu.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ * Author: Priyanka Jain <Priyanka.Jain@freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <common.h>
+#include <command.h>
+#include <fsl_diu_fb.h>
+#include <linux/ctype.h>
+#include <video_fb.h>
+
+#include "../common/diu_ch7301.h"
+
+#include "cpld.h"
+#include "t104xrdb.h"
+
+/*
+ * DIU Area Descriptor
+ *
+ * Note that we need to byte-swap the value before it's written to the AD
+ * register. So even though the registers don't look like they're in the same
+ * bit positions as they are on the MPC8610, the same value is written to the
+ * AD register on the MPC8610 and on the P1022.
+ */
+#define AD_BYTE_F 0x10000000
+#define AD_ALPHA_C_SHIFT 25
+#define AD_BLUE_C_SHIFT 23
+#define AD_GREEN_C_SHIFT 21
+#define AD_RED_C_SHIFT 19
+#define AD_PIXEL_S_SHIFT 16
+#define AD_COMP_3_SHIFT 12
+#define AD_COMP_2_SHIFT 8
+#define AD_COMP_1_SHIFT 4
+#define AD_COMP_0_SHIFT 0
+
+void diu_set_pixel_clock(unsigned int pixclock)
+{
+ unsigned long speed_ccb, temp;
+ u32 pixval;
+ int ret;
+
+ speed_ccb = get_bus_freq(0);
+ temp = 1000000000 / pixclock;
+ temp *= 1000;
+ pixval = speed_ccb / temp;
+
+ /* Program HDMI encoder */
+ ret = diu_set_dvi_encoder(temp);
+ if (ret) {
+ puts("Failed to set DVI encoder\n");
+ return;
+ }
+
+ /* Program pixel clock */
+ out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR,
+ ((pixval << PXCK_BITS_START) & PXCK_MASK));
+
+ /* enable clock*/
+ out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR, PXCKEN_MASK |
+ ((pixval << PXCK_BITS_START) & PXCK_MASK));
+}
+
+int platform_diu_init(unsigned int xres, unsigned int yres, const char *port)
+{
+ u32 pixel_format;
+ u8 sw;
+
+ /*Configure Display ouput port as HDMI*/
+ sw = CPLD_READ(sfp_ctl_status);
+ CPLD_WRITE(sfp_ctl_status , sw & ~(CPLD_DIU_SEL_DFP));
+
+ pixel_format = cpu_to_le32(AD_BYTE_F | (3 << AD_ALPHA_C_SHIFT) |
+ (0 << AD_BLUE_C_SHIFT) | (1 << AD_GREEN_C_SHIFT) |
+ (2 << AD_RED_C_SHIFT) | (8 << AD_COMP_3_SHIFT) |
+ (8 << AD_COMP_2_SHIFT) | (8 << AD_COMP_1_SHIFT) |
+ (8 << AD_COMP_0_SHIFT) | (3 << AD_PIXEL_S_SHIFT));
+
+ printf("DIU: Switching to monitor DVI @ %ux%u\n", xres, yres);
+
+ return fsl_diu_init(xres, yres, pixel_format, 0);
+}