From d21f496abaafcf828bd2dc0ec74d275c524fae65 Mon Sep 17 00:00:00 2001 From: Teresa Gámez Date: Tue, 30 Sep 2014 13:15:30 +0200 Subject: commands: add of_display_timings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Sascha Hauer --- commands/Kconfig | 15 ++++ commands/Makefile | 1 + commands/of_display_timings.c | 164 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 180 insertions(+) create mode 100644 commands/of_display_timings.c (limited to 'commands') diff --git a/commands/Kconfig b/commands/Kconfig index 3a49bafd27..0563e63f0a 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 52b6137c01..f5ecbe6f1e 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 0000000000..ccf2db0da5 --- /dev/null +++ b/commands/of_display_timings.c @@ -0,0 +1,164 @@ +/* + * of_display_timings.c - list and select display_timings + * + * Copyright (c) 2014 Teresa Gámez 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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, 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; + struct device_node *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); + free(fdt); + return -EINVAL; + } + + root = of_unflatten_dtb(fdt); + + free(fdt); + + if (IS_ERR(root)) + return PTR_ERR(root); + + } else { + root = of_get_root_node(); + } + + if (list) { + int found = 0; + const char *node = "display-timings"; + + for_each_node_by_name_from(display, root, 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_from(display, root, node) { + timings = of_parse_phandle_from(display, root, + "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); + + return 0; +} + +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 -- cgit v1.2.3