[U-Boot] [PATCH v3 3/3] sunxi: setup simplefb for Allwinner DE2

[Icenowy Zheng]

As the support of EFI boot on Allwinner H3 is broken, we still need to
use simplefb to pass the framebuffer to Linux.

Add code to setup simplefb for Allwinner DE2 driver.

Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
---
Changes in v3:
- Extract CONFIG_VIDEO_DT_SIMPLEFB to a Kconfig option.

Changes in v2:
- Extract the simplefb node searching code.

 drivers/video/sunxi/Makefile    |  2 +-
 drivers/video/sunxi/sunxi_de2.c | 72 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/drivers/video/sunxi/Makefile b/drivers/video/sunxi/Makefile
index 10862edaca..aec32b79b9 100644
--- a/drivers/video/sunxi/Makefile
+++ b/drivers/video/sunxi/Makefile
@@ -6,4 +6,4 @@
 #
 
 obj-$(CONFIG_VIDEO_SUNXI) += sunxi_display.o simplefb_common.o lcdc.o tve_common.o ../videomodes.o
-obj-$(CONFIG_VIDEO_DE2) += sunxi_de2.o sunxi_dw_hdmi.o lcdc.o ../dw_hdmi.o
+obj-$(CONFIG_VIDEO_DE2) += sunxi_de2.o sunxi_dw_hdmi.o simplefb_common.o lcdc.o ../dw_hdmi.o
diff --git a/drivers/video/sunxi/sunxi_de2.c b/drivers/video/sunxi/sunxi_de2.c
index ee67764ac5..67b937098c 100644
--- a/drivers/video/sunxi/sunxi_de2.c
+++ b/drivers/video/sunxi/sunxi_de2.c
@@ -10,6 +10,8 @@
 #include <display.h>
 #include <dm.h>
 #include <edid.h>
+#include <fdtdec.h>
+#include <fdt_support.h>
 #include <video.h>
 #include <asm/global_data.h>
 #include <asm/io.h>
@@ -17,6 +19,7 @@
 #include <asm/arch/display2.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
+#include "simplefb_common.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -292,3 +295,72 @@ U_BOOT_DRIVER(sunxi_de2) = {
 U_BOOT_DEVICE(sunxi_de2) = {
 	.name = "sunxi_de2"
 };
+
+/*
+ * Simplefb support.
+ */
+#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_VIDEO_DT_SIMPLEFB)
+int sunxi_simplefb_setup(void *blob)
+{
+	struct udevice *de2, *hdmi;
+	struct video_priv *de2_priv;
+	struct video_uc_platdata *de2_plat;
+	int mux;
+	int offset, ret;
+	u64 start, size;
+	const char *pipeline = NULL;
+
+	debug("Setting up simplefb\n");
+
+	if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
+		mux = 0;
+	else
+		mux = 1;
+
+	/* Skip simplefb setting if DE2 / HDMI is not present */
+	ret = uclass_find_device_by_name(UCLASS_VIDEO,
+					 "sunxi_de2", &de2);
+	if (ret) {
+		debug("DE2 not present\n");
+		return 0;
+	}
+
+	ret = uclass_find_device_by_name(UCLASS_DISPLAY,
+					 "sunxi_dw_hdmi", &hdmi);
+	if (ret) {
+		debug("HDMI not present\n");
+		return 0;
+	}
+
+	if (mux == 0)
+		pipeline = "mixer0-lcd0-hdmi";
+	else
+		pipeline = "mixer1-lcd1-hdmi";
+
+	de2_priv = dev_get_uclass_priv(de2);
+	de2_plat = dev_get_uclass_platdata(de2);
+
+	offset = sunxi_simplefb_fdt_match(blob, pipeline);
+	if (offset < 0) {
+		eprintf("Cannot setup simplefb: node not found\n");
+		return 0; /* Keep older kernels working */
+	}
+
+	start = gd->bd->bi_dram[0].start;
+	size = de2_plat->base - start;
+	ret = fdt_fixup_memory_banks(blob, &start, &size, 1);
+	if (ret) {
+		eprintf("Cannot setup simplefb: Error reserving memory\n");
+		return ret;
+	}
+
+	ret = fdt_setup_simplefb_node(blob, offset, de2_plat->base,
+			de2_priv->xsize, de2_priv->ysize,
+			VNBYTES(de2_priv->bpix) * de2_priv->xsize,
+			"x8r8g8b8");
+	if (ret)
+		eprintf("Cannot setup simplefb: Error setting properties\n");
+
+	return ret;
+}
+#endif /* CONFIG_OF_BOARD_SETUP && CONFIG_VIDEO_DT_SIMPLEFB */
-- 
2.13.5