[PATCH 2/2] commands: add of_display_timings
Teresa Gámez
t.gamez at phytec.de
Wed Sep 24 02:33:11 PDT 2014
A lot of boards use display-timings nodes to define the timings of one or more
displays. This command makes it possible to list and select displays which are
defined in a device tree.
Signed-off-by: Teresa Gámez <t.gamez at phytec.de>
---
commands/Kconfig | 15 ++++
commands/Makefile | 1 +
commands/of_display_timings.c | 180 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 196 insertions(+), 0 deletions(-)
create mode 100644 commands/of_display_timings.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 3a49baf..0563e63 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -1973,6 +1973,21 @@ config CMD_OF_PROPERTY
[00 11 22 .. nn] - byte stream
If the value does not start with '<' or '[' it is interpreted as string
+config CMD_OF_DISPLAY_TIMINGS
+ tristate
+ select OFTREE
+ prompt "of_display_timings"
+ help
+ List and select display timings
+
+ Usage: of_display_timings [-lS] [-s path] [-f dtb]
+
+ Options:
+ -l list path of all available display-timings
+ -S list path of all selected display-timings
+ -s path select display-timings and register oftree fixup
+ -f dtb work on dtb. Has no effect on -s option
+
config CMD_OFTREE
tristate
select OFTREE
diff --git a/commands/Makefile b/commands/Makefile
index 52b6137..f5ecbe6 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_CMD_OFTREE) += oftree.o
obj-$(CONFIG_CMD_OF_PROPERTY) += of_property.o
obj-$(CONFIG_CMD_OF_NODE) += of_node.o
obj-$(CONFIG_CMD_OF_DUMP) += of_dump.o
+obj-$(CONFIG_CMD_OF_DISPLAY_TIMINGS) += of_display_timings.o
obj-$(CONFIG_CMD_MAGICVAR) += magicvar.o
obj-$(CONFIG_CMD_IOMEM) += iomemport.o
obj-$(CONFIG_CMD_LINUX_EXEC) += linux_exec.o
diff --git a/commands/of_display_timings.c b/commands/of_display_timings.c
new file mode 100644
index 0000000..67763f8
--- /dev/null
+++ b/commands/of_display_timings.c
@@ -0,0 +1,180 @@
+/*
+ * of_display_timings.c - list and select display_timings
+ *
+ * Copyright (c) 2014 Teresa Gámez <t.gamez at phytec.de> PHYTEC Messtechnik GmbH
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <filetype.h>
+#include <libfile.h>
+#include <of.h>
+#include <command.h>
+#include <malloc.h>
+#include <complete.h>
+#include <asm/byteorder.h>
+#include <getopt.h>
+#include <linux/err.h>
+#include <string.h>
+
+static int of_display_timing(struct device_node *root, void *timingpath)
+{
+ int ret = 0;
+ struct device_node *display;
+
+ display = of_find_node_by_path_from(root, (char *) timingpath);
+ if (!display) {
+ pr_err("Path to display-timings is not vaild.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = of_set_property_to_child_phandle(display, "native-mode");
+ if (ret)
+ pr_err("Could not set display\n");
+out:
+ return ret;
+}
+
+static int do_of_display_timings(int argc, char *argv[])
+{
+ int opt;
+ int list = 0;
+ int selected = 0;
+ int ret = 0;
+ struct device_node *root = NULL;
+ struct device_node *internal_root = NULL;
+ struct device_node *display = NULL;
+ struct device_node *timings = NULL;
+ char *timingpath = NULL;
+ char *dtbfile = NULL;
+
+ while ((opt = getopt(argc, argv, "sS:lf:")) > 0) {
+ switch (opt) {
+ case 'l':
+ list = 1;
+ break;
+ case 'f':
+ dtbfile = optarg;
+ break;
+ case 's':
+ selected = 1;
+ break;
+ case 'S':
+ timingpath = xzalloc(strlen(optarg) + 1);
+ strcpy(timingpath, optarg);
+ break;
+ default:
+ return COMMAND_ERROR_USAGE;
+ }
+ }
+
+ /* Check if external dtb given */
+ if (dtbfile) {
+ void *fdt;
+ size_t size;
+
+ fdt = read_file(dtbfile, &size);
+ if (!fdt) {
+ pr_err("unable to read %s: %s\n", dtbfile,
+ strerror(errno));
+ return -errno;
+ }
+
+ if (file_detect_type(fdt, size) != filetype_oftree) {
+ pr_err("%s is not a oftree file.\n", dtbfile);
+ return -EINVAL;
+ }
+
+ root = of_unflatten_dtb(fdt);
+
+ free(fdt);
+
+ if (IS_ERR(root)) {
+ ret = PTR_ERR(root);
+ goto out;
+ }
+
+ /*
+ * We set the external node to our internal node as
+ * long as the command runs. This makes life easier to
+ * use of tree functions. We backup the internal root node
+ * and set it back at the end.
+ */
+ internal_root = of_get_root_node();
+ of_set_root_node(NULL);
+ of_set_root_node(root);
+ } else {
+ root = of_get_root_node();
+ }
+
+ if (list) {
+ int found = 0;
+ const char *node = "display-timings";
+
+ for_each_node_by_name(display, node) {
+ for_each_child_of_node(display, timings) {
+ printf("%s\n", timings->full_name);
+ found = 1;
+ }
+ }
+
+ if (!found)
+ printf("No display-timings found.\n");
+ }
+
+ if (selected) {
+ int found = 0;
+ const char *node = "display-timings";
+
+ for_each_node_by_name(display, node) {
+ timings = of_parse_phandle(display, "native-mode", 0);
+ if (!timings)
+ continue;
+
+ printf("%s\n", timings->full_name);
+ found = 1;
+ }
+
+ if (!found)
+ printf("No selected display-timings found.\n");
+ }
+
+ if (timingpath)
+ of_register_fixup(of_display_timing, timingpath);
+out:
+ if (internal_root) {
+ of_set_root_node(NULL);
+ of_set_root_node(internal_root);
+ }
+
+ return ret;
+}
+
+BAREBOX_CMD_HELP_START(of_display_timings)
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT("-l", "list path of all available display-timings\n")
+BAREBOX_CMD_HELP_OPT("-s", "list path of all selected display-timings\n")
+BAREBOX_CMD_HELP_OPT("-S path", "select display-timings and register oftree fixup\n")
+BAREBOX_CMD_HELP_OPT("-f dtb", "work on dtb. Has no effect on -s option\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(of_display_timings)
+ .cmd = do_of_display_timings,
+ BAREBOX_CMD_DESC("print and select display-timings")
+ BAREBOX_CMD_OPTS("[-ls] [-S path] [-f dtb]")
+ BAREBOX_CMD_GROUP(CMD_GRP_MISC)
+ BAREBOX_CMD_COMPLETE(devicetree_file_complete)
+ BAREBOX_CMD_HELP(cmd_of_display_timings_help)
+BAREBOX_CMD_END
--
1.7.0.4
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