ls102xa: dcu: Add platform support for DCU on LS1021AQDS board

This patch adds the CH7301 HDMI options and the common configuration
for DCU on LS1021AQDS board.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Alison Wang <alison.wang@freescale.com>
Cc: Jason Jin <Jason.Jin@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

4 files changed, 99 insertions, 0 deletions

diff --git a/board/freescale/ls1021aqds/Makefile b/board/freescale/ls1021aqds/Makefile
index 3b6903c..ab02344 100644
--- a/board/freescale/ls1021aqds/Makefile
+++ b/board/freescale/ls1021aqds/Makefile
@@ -7,3 +7,4 @@
 obj-y += ls1021aqds.o
 obj-y += ddr.o
 obj-y += eth.o
+obj-$(CONFIG_FSL_DCU_FB) += dcu.o
diff --git a/board/freescale/ls1021aqds/dcu.c b/board/freescale/ls1021aqds/dcu.c
new file mode 100644
index 0000000..90f5bc0
--- /dev/null
+++ b/board/freescale/ls1021aqds/dcu.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * FSL DCU Framebuffer driver
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <common.h>
+#include <fsl_dcu_fb.h>
+#include <i2c.h>
+#include "div64.h"
+#include "../common/diu_ch7301.h"
+#include "ls1021aqds_qixis.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int select_i2c_ch_pca9547(u8 ch)
+{
+	int ret;
+
+	ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
+	if (ret) {
+		puts("PCA: failed to select proper channel\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+unsigned int dcu_set_pixel_clock(unsigned int pixclock)
+{
+	unsigned long long div;
+
+	div = (unsigned long long)(gd->bus_clk / 1000);
+	div *= (unsigned long long)pixclock;
+	do_div(div, 1000000000);
+
+	return div;
+}
+
+int platform_dcu_init(unsigned int xres, unsigned int yres,
+		      const char *port,
+		      struct fb_videomode *dcu_fb_videomode)
+{
+	const char *name;
+	unsigned int pixel_format;
+	int ret;
+	u8 ch;
+
+	/* Mux I2C3+I2C4 as HSYNC+VSYNC */
+	ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
+		       1, &ch, 1);
+	if (ret) {
+		printf("Error: failed to read I2C @%02x\n",
+		       CONFIG_SYS_I2C_QIXIS_ADDR);
+		return ret;
+	}
+	ch &= 0x1F;
+	ch |= 0xA0;
+	ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
+			1, &ch, 1);
+	if (ret) {
+		printf("Error: failed to write I2C @%02x\n",
+		       CONFIG_SYS_I2C_QIXIS_ADDR);
+		return ret;
+	}
+
+	if (strncmp(port, "hdmi", 4) == 0) {
+		unsigned long pixval;
+
+		name = "HDMI";
+
+		pixval = 1000000000 / dcu_fb_videomode->pixclock;
+		pixval *= 1000;
+
+		i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
+		select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
+		diu_set_dvi_encoder(pixval);
+		select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
+	} else {
+		return 0;
+	}
+
+	printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
+
+	pixel_format = 32;
+	fsl_dcu_init(xres, yres, pixel_format);
+
+	return 0;
+}
diff --git a/board/freescale/ls1021aqds/ls1021aqds.c b/board/freescale/ls1021aqds/ls1021aqds.c
index 0a3252e..691e993 100644
--- a/board/freescale/ls1021aqds/ls1021aqds.c
+++ b/board/freescale/ls1021aqds/ls1021aqds.c
@@ -193,6 +193,10 @@ int board_early_init_f(void)
 	out_be32(&scfg->qspi_cfg, SCFG_QSPI_CLKSEL);
 #endif
 
+#ifdef CONFIG_FSL_DCU_FB
+	out_be32(&scfg->pixclkcr, SCFG_PIXCLKCR_PXCKEN);
+#endif
+
 	/* Workaround for the issue that DDR could not respond to
 	 * barrier transaction which is generated by executing DSB/ISB
 	 * instruction. Set CCI-400 control override register to
diff --git a/board/freescale/ls1021aqds/ls1021aqds_qixis.h b/board/freescale/ls1021aqds/ls1021aqds_qixis.h
index 09b3be2..8e482eb 100644
--- a/board/freescale/ls1021aqds/ls1021aqds_qixis.h
+++ b/board/freescale/ls1021aqds/ls1021aqds_qixis.h
@@ -32,4 +32,6 @@
 
 #define QIXIS_SRDS1CLK_100		0x0
 
+#define QIXIS_DCU_BRDCFG5		0x55
+
 #endif