video_osd: Add osd sandbox driver and tests

Add sandbox driver and tests for the new OSD uclass.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/video/Kconfig

@@ -692,6 +692,12 @@ config OSD
 	   is a (usually text-oriented) graphics buffer to show information on
 	   a display.
 
+config SANDBOX_OSD
+	bool "Enable sandbox OSD"
+	depends on OSD
+	help
+	  Enable support for sandbox OSD device used for testing purposes.
+
 config IHS_VIDEO_OUT
 	bool "Enable IHS video out driver"
 	depends on OSD

drivers/video/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_LG4573) += lg4573.o
 obj-$(CONFIG_LOGICORE_DP_TX) += logicore_dp_tx.o
 obj-$(CONFIG_OSD) += video_osd-uclass.o
 obj-$(CONFIG_PXA_LCD) += pxa_lcd.o
+obj-$(CONFIG_SANDBOX_OSD) += sandbox_osd.o
 obj-$(CONFIG_S6E8AX0) += s6e8ax0.o
 obj-$(CONFIG_SCF0403_LCD) += scf0403_lcd.o
 obj-$(CONFIG_VIDEO_BCM2835) += bcm2835.o

drivers/video/sandbox_osd.c

@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+#include <common.h>
+#include <display.h>
+#include <dm.h>
+#include <video_osd.h>
+
+#include "sandbox_osd.h"
+
+struct sandbox_osd_priv {
+	uint width;
+	uint height;
+	u16 *buf;
+};
+
+static const struct udevice_id sandbox_osd_ids[] = {
+	{ .compatible = "sandbox,sandbox_osd" },
+	{ }
+};
+
+inline u16 make_memval(u8 chr, u8 color)
+{
+	return chr * 0x100 + color;
+}
+
+int sandbox_osd_get_info(struct udevice *dev, struct video_osd_info *info)
+{
+	struct sandbox_osd_priv *priv = dev_get_priv(dev);
+
+	info->width = priv->width;
+	info->height = priv->height;
+	info->major_version = 1;
+	info->minor_version = 0;
+
+	return 0;
+}
+
+int sandbox_osd_set_mem(struct udevice *dev, uint col, uint row, u8 *buf,
+			size_t buflen, uint count)
+{
+	struct sandbox_osd_priv *priv = dev_get_priv(dev);
+	int pos;
+	u8 *mem = (u8 *)priv->buf;
+	int i;
+
+	pos = 2 * (row * priv->width + col);
+
+	if (pos >= 2 * (priv->width * priv->height))
+		return -EINVAL;
+
+	for (i = 0; i < count; i++)
+		memcpy(mem + pos + (i * buflen), buf, buflen);
+
+	return 0;
+}
+
+int _sandbox_osd_set_size(struct udevice *dev, uint col, uint row)
+{
+	struct sandbox_osd_priv *priv = dev_get_priv(dev);
+	int i;
+	uint size;
+
+	priv->width = col;
+	priv->height = row;
+	size = priv->width * priv->height;
+	if (!priv->buf)
+		priv->buf = calloc(size, sizeof(u16));
+	else
+		priv->buf = realloc(priv->buf, size * sizeof(u16));
+
+	if (!priv->buf)
+		return -ENOMEM;
+
+	/* Fill OSD with black spaces */
+	for (i = 0; i < size; i++)
+		priv->buf[i] = make_memval(' ', 'k');
+
+	return 0;
+}
+
+int sandbox_osd_set_size(struct udevice *dev, uint col, uint row)
+{
+	return _sandbox_osd_set_size(dev, col, row);
+}
+
+int sandbox_osd_print(struct udevice *dev, uint col, uint row, ulong color,
+		      char *text)
+{
+	struct sandbox_osd_priv *priv = dev_get_priv(dev);
+	char cval;
+	char *p;
+	int pos;
+
+	if (col >= priv->width || row >= priv->height)
+		return -EINVAL;
+
+	switch (color) {
+	case COLOR_BLACK:
+		cval = 'k';
+		break;
+	case COLOR_WHITE:
+		cval = 'w';
+		break;
+	case COLOR_RED:
+		cval = 'r';
+		break;
+	case COLOR_GREEN:
+		cval = 'g';
+		break;
+	case COLOR_BLUE:
+		cval = 'b';
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	p = text;
+	pos = row * priv->width + col;
+
+	while (*p)
+		priv->buf[pos++] = make_memval(*(p++), cval);
+
+	return 0;
+}
+
+int sandbox_osd_get_mem(struct udevice *dev, u8 *buf, size_t buflen)
+{
+	struct sandbox_osd_priv *priv = dev_get_priv(dev);
+	uint memsize = 2 * (priv->width * priv->height);
+
+	if (buflen < memsize)
+		return -EINVAL;
+
+	memcpy(buf, priv->buf, memsize);
+
+	return 0;
+}
+
+static const struct video_osd_ops sandbox_osd_ops = {
+	.get_info = sandbox_osd_get_info,
+	.set_mem = sandbox_osd_set_mem,
+	.set_size = sandbox_osd_set_size,
+	.print = sandbox_osd_print,
+};
+
+int sandbox_osd_probe(struct udevice *dev)
+{
+	return _sandbox_osd_set_size(dev, 10, 10);
+}
+
+U_BOOT_DRIVER(sandbox_osd_drv) = {
+	.name           = "sandbox_osd_drv",
+	.id             = UCLASS_VIDEO_OSD,
+	.ops		= &sandbox_osd_ops,
+	.of_match       = sandbox_osd_ids,
+	.probe          = sandbox_osd_probe,
+	.priv_auto_alloc_size = sizeof(struct sandbox_osd_priv),
+};

drivers/video/sandbox_osd.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+enum {
+	COLOR_BLACK,
+	COLOR_WHITE,
+	COLOR_RED,
+	COLOR_GREEN,
+	COLOR_BLUE,
+};