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Signed-off-by: Todor Tomov <ttomov@mm-sol.com>

1 files changed, 809 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..aa4ced0
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,809 @@
+/*
+ * Media controller test application
+ *
+ * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ */
+
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <linux/types.h>
+#include <linux/media.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/v4l2-subdev.h>
+#include <linux/videodev2.h>
+
+#include "media.h"
+#include "options.h"
+#include "subdev.h"
+#include "tools.h"
+
+/* -----------------------------------------------------------------------------
+ * Printing
+ */
+
+static struct {
+	const char *name;
+	enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+	{ "Y8", V4L2_MBUS_FMT_Y8_1X8},
+	{ "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 },
+	{ "UYVY", V4L2_MBUS_FMT_UYVY8_1X16 },
+	{ "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
+	{ "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
+};
+
+static const char *pixelcode_to_string(enum v4l2_mbus_pixelcode code)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+		if (mbus_formats[i].code == code)
+			return mbus_formats[i].name;
+	}
+
+	return "unknown";
+}
+
+static enum v4l2_mbus_pixelcode string_to_pixelcode(const char *string,
+					     unsigned int length)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+		if (strncmp(mbus_formats[i].name, string, length) == 0)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(mbus_formats))
+		return (enum v4l2_mbus_pixelcode)-1;
+
+	return mbus_formats[i].code;
+}
+
+static void v4l2_subdev_print_format(struct media_entity *entity,
+	unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+	struct v4l2_mbus_framefmt format;
+	struct v4l2_rect rect;
+	int ret;
+
+	ret = v4l2_subdev_get_format(entity, &format, pad, which);
+	if (ret != 0)
+		return;
+
+	printf("[%s %ux%u", pixelcode_to_string(format.code),
+	       format.width, format.height);
+
+	ret = v4l2_subdev_get_crop(entity, &rect, pad, which);
+	if (ret == 0)
+		printf(" (%u,%u)/%ux%u", rect.left, rect.top,
+		       rect.width, rect.height);
+	printf("]");
+}
+
+static const char *media_entity_type_to_string(unsigned type)
+{
+	static const struct {
+		__u32 type;
+		const char *name;
+	} types[] = {
+		{ MEDIA_ENTITY_TYPE_NODE, "Node" },
+		{ MEDIA_ENTITY_TYPE_SUBDEV, "V4L2 subdev" },
+	};
+
+	unsigned int i;
+
+	type &= MEDIA_ENTITY_TYPE_MASK;
+
+	for (i = 0; i < ARRAY_SIZE(types); i++) {
+		if (types[i].type == type)
+			return types[i].name;
+	}
+
+	return "Unknown";
+}
+
+static const char *media_entity_subtype_to_string(unsigned type)
+{
+	static const char *node_types[] = {
+		"Unknown",
+		"V4L",
+		"FB",
+		"ALSA",
+		"DVB",
+	};
+	static const char *subdev_types[] = {
+		"Unknown",
+		"Sensor",
+		"Flash",
+		"Lens",
+	};
+
+	unsigned int subtype = type & MEDIA_ENTITY_SUBTYPE_MASK;
+
+	switch (type & MEDIA_ENTITY_TYPE_MASK) {
+	case MEDIA_ENTITY_TYPE_NODE:
+		if (subtype >= ARRAY_SIZE(node_types))
+			subtype = 0;
+		return node_types[subtype];
+
+	case MEDIA_ENTITY_TYPE_SUBDEV:
+		if (subtype >= ARRAY_SIZE(subdev_types))
+			subtype = 0;
+		return subdev_types[subtype];
+	default:
+		return node_types[0];
+	}
+}
+
+static const char *media_pad_type_to_string(unsigned flag)
+{
+	static const struct {
+		__u32 flag;
+		const char *name;
+	} flags[] = {
+		{ MEDIA_PAD_FLAG_INPUT, "Input" },
+		{ MEDIA_PAD_FLAG_OUTPUT, "Output" },
+	};
+
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(flags); i++) {
+		if (flags[i].flag & flag)
+			return flags[i].name;
+	}
+
+	return "Unknown";
+}
+
+static void media_print_topology_dot(struct media_device *media)
+{
+	unsigned int i, j;
+
+	printf("digraph board {\n");
+	printf("\trankdir=TB\n");
+
+	for (i = 0; i < media->entities_count; ++i) {
+		struct media_entity *entity = &media->entities[i];
+		unsigned int npads;
+
+		switch (media_entity_type(entity)) {
+		case MEDIA_ENTITY_TYPE_NODE:
+			printf("\tn%08x [label=\"%s\\n%s\", shape=box, style=filled, "
+			       "fillcolor=yellow]\n",
+			       entity->info.id, entity->info.name, entity->devname);
+			break;
+
+		case MEDIA_ENTITY_TYPE_SUBDEV:
+			printf("\tn%08x [label=\"{{", entity->info.id);
+
+			for (j = 0, npads = 0; j < entity->info.pads; ++j) {
+				if (!(entity->pads[j].flags & MEDIA_PAD_FLAG_INPUT))
+					continue;
+
+				printf("%s<port%u> %u", npads ? " | " : "", j, j);
+				npads++;
+			}
+
+			printf("} | %s", entity->info.name);
+			if (entity->devname)
+				printf("\\n%s", entity->devname);
+			printf(" | {");
+
+			for (j = 0, npads = 0; j < entity->info.pads; ++j) {
+				if (!(entity->pads[j].flags & MEDIA_PAD_FLAG_OUTPUT))
+					continue;
+
+				printf("%s<port%u> %u", npads ? " | " : "", j, j);
+				npads++;
+			}
+
+			printf("}}\", shape=Mrecord, style=filled, fillcolor=green]\n");
+			break;
+
+		default:
+			continue;
+		}
+
+		for (j = 0; j < entity->num_links; j++) {
+			struct media_link *link = &entity->links[j];
+
+			if (link->source->entity != entity)
+				continue;
+
+			printf("\tn%08x", link->source->entity->info.id);
+			if (media_entity_type(link->source->entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+				printf(":port%u", link->source->index);
+			printf(" -> ");
+			printf("n%08x", link->sink->entity->info.id);
+			if (media_entity_type(link->sink->entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+				printf(":port%u", link->sink->index);
+
+			if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE)
+				printf(" [style=bold]");
+			else if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
+				printf(" [style=dashed]");
+			printf("\n");
+		}
+	}
+
+	printf("}\n");
+}
+
+static void media_print_topology_text(struct media_device *media)
+{
+	unsigned int i, j, k;
+	unsigned int padding;
+
+	printf("Device topology\n");
+
+	for (i = 0; i < media->entities_count; ++i) {
+		struct media_entity *entity = &media->entities[i];
+
+		padding = printf("- entity %u: ", entity->info.id);
+		printf("%s (%u pad%s, %u link%s)\n", entity->info.name,
+			entity->info.pads, entity->info.pads > 1 ? "s" : "",
+			entity->info.links, entity->info.links > 1 ? "s" : "");
+		printf("%*ctype %s subtype %s\n", padding, ' ',
+			media_entity_type_to_string(entity->info.type),
+			media_entity_subtype_to_string(entity->info.type));
+		if (entity->devname[0])
+			printf("%*cdevice node name %s\n", padding, ' ', entity->devname);
+
+		for (j = 0; j < entity->info.pads; j++) {
+			struct media_pad *pad = &entity->pads[j];
+
+			printf("\tpad%u: %s ", j, media_pad_type_to_string(pad->flags));
+
+			if (media_entity_type(entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+				v4l2_subdev_print_format(entity, j, V4L2_SUBDEV_FORMAT_ACTIVE);
+
+			printf("\n");
+
+			for (k = 0; k < entity->num_links; k++) {
+				struct media_link *link = &entity->links[k];
+
+				if (link->source->entity != entity ||
+				    link->source->index != j)
+					continue;
+
+				printf("\t\t-> '%s':pad%u [",
+					link->sink->entity->info.name, link->sink->index);
+
+				if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE)
+					printf("IMMUTABLE,");
+				if (link->flags & MEDIA_LINK_FLAG_ACTIVE)
+					printf("ACTIVE");
+
+				printf("]\n");
+			}
+		}
+		printf("\n");
+	}
+}
+
+void media_print_topology(struct media_device *media, int dot)
+{
+	if (dot)
+		media_print_topology_dot(media);
+	else
+		media_print_topology_text(media);
+}
+
+/* -----------------------------------------------------------------------------
+ * Links setup
+ */
+
+static struct media_pad *parse_pad(struct media_device *media, const char *p, char **endp)
+{
+	unsigned int entity_id, pad;
+	struct media_entity *entity;
+	char *end;
+
+	for (; isspace(*p); ++p);
+
+	if (*p == '"') {
+		for (end = (char *)p + 1; *end && *end != '"'; ++end);
+		if (*end != '"')
+			return NULL;
+
+		entity = media_get_entity_by_name(media, p + 1, end - p - 1);
+		if (entity == NULL)
+			return NULL;
+
+		++end;
+	} else {
+		entity_id = strtoul(p, &end, 10);
+		entity = media_get_entity_by_id(media, entity_id);
+		if (entity == NULL)
+			return NULL;
+	}
+	for (; isspace(*end); ++end);
+
+	if (*end != ':')
+		return NULL;
+	for (p = end + 1; isspace(*p); ++p);
+
+	pad = strtoul(p, &end, 10);
+	for (p = end; isspace(*p); ++p);
+
+	if (pad >= entity->info.pads)
+		return NULL;
+
+	for (p = end; isspace(*p); ++p);
+	if (endp)
+		*endp = (char *)p;
+
+	return &entity->pads[pad];
+}
+
+static struct media_link *parse_link(struct media_device *media, const char *p, char **endp)
+{
+	struct media_link *link;
+	struct media_pad *source;
+	struct media_pad *sink;
+	unsigned int i;
+	char *end;
+
+	source = parse_pad(media, p, &end);
+	if (source == NULL)
+		return NULL;
+
+	if (end[0] != '-' || end[1] != '>')
+		return NULL;
+	p = end + 2;
+
+	sink = parse_pad(media, p, &end);
+	if (sink == NULL)
+		return NULL;
+
+	*endp = end;
+
+	for (i = 0; i < source->entity->num_links; i++) {
+		link = &source->entity->links[i];
+
+		if (link->source == source && link->sink == sink)
+			return link;
+	}
+
+	return NULL;
+}
+
+static int setup_link(struct media_device *media, const char *p, char **endp)
+{
+	struct media_link *link;
+	__u32 flags;
+	char *end;
+
+	link = parse_link(media, p, &end);
+	if (link == NULL) {
+		printf("Unable to parse link\n");
+		return -EINVAL;
+	}
+
+	p = end;
+	if (*p++ != '[') {
+		printf("Unable to parse link flags\n");
+		return -EINVAL;
+	}
+
+	flags = strtoul(p, &end, 10);
+	for (p = end; isspace(*p); p++);
+	if (*p++ != ']') {
+		printf("Unable to parse link flags\n");
+		return -EINVAL;
+	}
+
+	for (; isspace(*p); p++);
+	*endp = (char *)p;
+
+	printf("Setting up link %u:%u -> %u:%u [%u]\n",
+		link->source->entity->info.id, link->source->index,
+		link->sink->entity->info.id, link->sink->index,
+		flags);
+
+	return media_setup_link(media, link->source, link->sink, flags);
+}
+
+static int setup_links(struct media_device *media, const char *p)
+{
+	char *end;
+	int ret;
+
+	do {
+		ret = setup_link(media, p, &end);
+		if (ret < 0)
+			return ret;
+
+		p = end + 1;
+	} while (*end == ',');
+
+	return *end ? -EINVAL : 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Formats setup
+ */
+
+static int parse_format(struct v4l2_mbus_framefmt *format, const char *p, char **endp)
+{
+	enum v4l2_mbus_pixelcode code;
+	unsigned int width, height;
+	char *end;
+
+	for (; isspace(*p); ++p);
+	for (end = (char *)p; !isspace(*end) && *end != '\0'; ++end);
+
+	code = string_to_pixelcode(p, end - p);
+	if (code == (enum v4l2_mbus_pixelcode)-1)
+		return -EINVAL;
+
+	for (p = end; isspace(*p); ++p);
+	width = strtoul(p, &end, 10);
+	if (*end != 'x')
+		return -EINVAL;
+
+	p = end + 1;
+	height = strtoul(p, &end, 10);
+	*endp = end;
+
+	memset(format, 0, sizeof(*format));
+	format->width = width;
+	format->height = height;
+	format->code = code;
+
+	return 0;
+}
+
+static int parse_crop(struct v4l2_rect *crop, const char *p, char **endp)
+{
+	char *end;
+
+	if (*p++ != '(')
+		return -EINVAL;
+
+	crop->left = strtoul(p, &end, 10);
+	if (*end != ',')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->top = strtoul(p, &end, 10);
+	if (*end++ != ')')
+		return -EINVAL;
+	if (*end != '/')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->width = strtoul(p, &end, 10);
+	if (*end != 'x')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->height = strtoul(p, &end, 10);
+	*endp = end;
+
+	return 0;
+}
+
+static int parse_frame_interval(struct v4l2_fract *interval, const char *p, char **endp)
+{
+	char *end;
+
+	for (; isspace(*p); ++p);
+
+	interval->numerator = strtoul(p, &end, 10);
+
+	for (p = end; isspace(*p); ++p);
+	if (*p++ != '/')
+		return -EINVAL;
+
+	for (; isspace(*p); ++p);
+	interval->denominator = strtoul(p, &end, 10);
+
+	*endp = end;
+	return 0;
+}
+
+static struct media_pad *parse_pad_format(struct media_device *media,
+	struct v4l2_mbus_framefmt *format, struct v4l2_rect *crop,
+	struct v4l2_fract *interval, const char *p, char **endp)
+{
+	struct media_pad *pad;
+	char *end;
+	int ret;
+
+	for (; isspace(*p); ++p);
+
+	pad = parse_pad(media, p, &end);
+	if (pad == NULL)
+		return NULL;
+
+	for (p = end; isspace(*p); ++p);
+	if (*p++ != '[')
+		return NULL;
+
+	for (; isspace(*p); ++p);
+
+	if (isalnum(*p)) {
+		ret = parse_format(format, p, &end);
+		if (ret < 0)
+			return NULL;
+
+		for (p = end; isspace(*p); p++);
+	}
+
+	if (*p == '(') {
+		ret = parse_crop(crop, p, &end);
+		if (ret < 0)
+			return NULL;
+
+		for (p = end; isspace(*p); p++);
+	}
+
+	if (*p == '@') {
+		ret = parse_frame_interval(interval, ++p, &end);
+		if (ret < 0)
+			return NULL;
+
+		for (p = end; isspace(*p); p++);
+	}
+
+	if (*p != ']')
+		return NULL;
+
+	*endp = (char *)p + 1;
+	return pad;
+}
+
+static int set_format(struct media_pad *pad, struct v4l2_mbus_framefmt *format)
+{
+	int ret;
+
+	if (format->width == 0 || format->height == 0)
+		return 0;
+
+	printf("Setting up format %s %ux%u on pad %s/%u\n",
+		pixelcode_to_string(format->code), format->width, format->height,
+		pad->entity->info.name, pad->index);
+
+	ret = v4l2_subdev_set_format(pad->entity, format, pad->index,
+				     V4L2_SUBDEV_FORMAT_ACTIVE);
+	if (ret < 0) {
+		printf("Unable to set format: %s (%d)\n", strerror(-ret), ret);
+		return ret;
+	}
+
+	printf("Format set: %s %ux%u\n",
+		pixelcode_to_string(format->code), format->width, format->height);
+
+	return 0;
+}
+
+static int set_crop(struct media_pad *pad, struct v4l2_rect *crop)
+{
+	int ret;
+
+	if (crop->left == -1 || crop->top == -1)
+		return 0;
+
+	printf("Setting up crop rectangle (%u,%u)/%ux%u on pad %s/%u\n",
+		crop->left, crop->top, crop->width, crop->height,
+		pad->entity->info.name, pad->index);
+
+	ret = v4l2_subdev_set_crop(pad->entity, crop, pad->index,
+				   V4L2_SUBDEV_FORMAT_ACTIVE);
+	if (ret < 0) {
+		printf("Unable to set crop rectangle: %s (%d)\n", strerror(-ret), ret);
+		return ret;
+	}
+
+	printf("Crop rectangle set: (%u,%u)/%ux%u\n",
+		crop->left, crop->top, crop->width, crop->height);
+
+	return 0;
+}
+
+static int set_frame_interval(struct media_entity *entity, struct v4l2_fract *interval)
+{
+	int ret;
+
+	if (interval->numerator == 0)
+		return 0;
+
+	printf("Setting up frame interval %u/%u on entity %s\n",
+		interval->numerator, interval->denominator, entity->info.name);
+
+	ret = v4l2_subdev_set_frame_interval(entity, interval);
+	if (ret < 0) {
+		printf("Unable to set frame interval: %s (%d)", strerror(-ret), ret);
+		return ret;
+	}
+
+	printf("Frame interval set: %u/%u\n",
+		interval->numerator, interval->denominator);
+
+	return 0;
+}
+
+
+static int setup_format(struct media_device *media, const char *p, char **endp)
+{
+	struct v4l2_mbus_framefmt format = { 0, 0, 0 };
+	struct media_pad *pad;
+	struct v4l2_rect crop = { -1, -1, -1, -1 };
+	struct v4l2_fract interval = { 0, 0 };
+	unsigned int i;
+	char *end;
+	int ret;
+
+	pad = parse_pad_format(media, &format, &crop, &interval, p, &end);
+	if (pad == NULL) {
+		printf("Unable to parse format\n");
+		return -EINVAL;
+	}
+
+	if (pad->flags & MEDIA_PAD_FLAG_OUTPUT) {
+		ret = set_crop(pad, &crop);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = set_format(pad, &format);
+	if (ret < 0)
+		return ret;
+
+	if (pad->flags & MEDIA_PAD_FLAG_INPUT) {
+		ret = set_crop(pad, &crop);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = set_frame_interval(pad->entity, &interval);
+	if (ret < 0)
+		return ret;
+
+
+	/* If the pad is an output pad, automatically set the same format on
+	 * the remote subdev input pads, if any.
+	 */
+	if (pad->flags & MEDIA_PAD_FLAG_OUTPUT) {
+		for (i = 0; i < pad->entity->num_links; ++i) {
+			struct media_link *link = &pad->entity->links[i];
+			struct v4l2_mbus_framefmt remote_format;
+
+			if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
+				continue;
+
+			if (link->source == pad &&
+			    link->sink->entity->info.type == MEDIA_ENTITY_TYPE_SUBDEV) {
+				remote_format = format;
+				set_format(link->sink, &remote_format);
+			}
+		}
+	}
+
+	*endp = end;
+	return 0;
+}
+
+static int setup_formats(struct media_device *media, const char *p)
+{
+	char *end;
+	int ret;
+
+	do {
+		ret = setup_format(media, p, &end);
+		if (ret < 0)
+			return ret;
+
+		p = end + 1;
+	} while (*end == ',');
+
+	return *end ? -EINVAL : 0;
+}
+
+int main(int argc, char **argv)
+{
+	struct media_device *media;
+	int ret = -1;
+
+	if (parse_cmdline(argc, argv))
+		return EXIT_FAILURE;
+
+	/* Open the media device and enumerate entities, pads and links. */
+	media = media_open(media_opts.devname, media_opts.verbose);
+	if (media == NULL)
+		goto out;
+
+	if (media_opts.entity) {
+		struct media_entity *entity;
+
+		entity = media_get_entity_by_name(media, media_opts.entity,
+						  strlen(media_opts.entity));
+		if (entity == NULL) {
+			printf("Entity '%s' not found\n", media_opts.entity);
+			goto out;
+		}
+
+		printf("%s\n", entity->devname);
+	}
+
+	if (media_opts.pad) {
+		struct media_pad *pad;
+
+		pad = parse_pad(media, media_opts.pad, NULL);
+		if (pad == NULL) {
+			printf("Pad '%s' not found\n", media_opts.pad);
+			goto out;
+		}
+
+		v4l2_subdev_print_format(pad->entity, pad->index,
+					 V4L2_SUBDEV_FORMAT_ACTIVE);
+		printf("\n");
+	}
+
+	if (media_opts.print || media_opts.print_dot) {
+		media_print_topology(media, media_opts.print_dot);
+		printf("\n");
+	}
+
+	if (media_opts.reset) {
+		printf("Resetting all links to inactive\n");
+		media_reset_links(media);
+	}
+
+	if (media_opts.links)
+		setup_links(media, media_opts.links);
+
+	if (media_opts.formats)
+		setup_formats(media, media_opts.formats);
+
+	if (media_opts.interactive) {
+		while (1) {
+			char buffer[32];
+			char *end;
+
+			printf("Enter a link to modify or enter to stop\n");
+			if (fgets(buffer, sizeof buffer, stdin) == NULL)
+				break;
+
+			if (buffer[0] == '\n')
+				break;
+
+			setup_link(media, buffer, &end);
+		}
+	}
+
+	ret = 0;
+
+out:
+	if (media)
+		media_close(media);
+
+	return ret ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+