Applied to acpi-test.
thanks
-Len
On Tuesday 19 December 2006 15:56, akpm@xxxxxxxx wrote:
> From: Yu Luming <luming.yu@xxxxxxxxx>
>
> Add generic abstract layer for display output switch control. The output
> sysfs class driver provides an abstract video output layer that can be used to
> hook platform specific methods to enable/disable video output device through
> common sysfs interface.
>
> Signed-off-by: Luming Yu <Luming.yu@xxxxxxxxx>
> Cc: "Antonino A. Daplas" <adaplas@xxxxxxx>
> Cc: "Brown, Len" <len.brown@xxxxxxxxx>
> Cc: Greg KH <greg@xxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
> ---
>
> drivers/video/output.c | 129 +++++++++++++++++++++++++++++++++
> include/linux/video_output.h | 42 ++++++++++
> 2 files changed, 171 insertions(+)
>
> diff -puN /dev/null drivers/video/output.c
> --- /dev/null
> +++ a/drivers/video/output.c
> @@ -0,0 +1,129 @@
> +/*
> + * output.c - Display Output Switch driver
> + *
> + * Copyright (C) 2006 Luming Yu <luming.yu@xxxxxxxxx>
> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + *
> + * 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.,
> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + */
> +#include <linux/module.h>
> +#include <linux/video_output.h>
> +#include <linux/err.h>
> +#include <linux/ctype.h>
> +
> +
> +MODULE_DESCRIPTION("Display Output Switcher Lowlevel Control Abstraction");
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Luming Yu <luming.yu@xxxxxxxxx>");
> +
> +static ssize_t video_output_show_state(struct class_device *dev,char *buf)
> +{
> + ssize_t ret_size = 0;
> + struct output_device *od = to_output_device(dev);
> + if (od->props)
> + ret_size = sprintf(buf,"%.8x\n",od->props->get_status(od));
> + return ret_size;
> +}
> +
> +static ssize_t video_output_store_state(struct class_device *dev,
> + const char *buf,size_t count)
> +{
> + char *endp;
> + struct output_device *od = to_output_device(dev);
> + int request_state = simple_strtoul(buf,&endp,0);
> + size_t size = endp - buf;
> +
> + if (*endp && isspace(*endp))
> + size++;
> + if (size != count)
> + return -EINVAL;
> +
> + if (od->props) {
> + od->request_state = request_state;
> + od->props->set_state(od);
> + }
> + return count;
> +}
> +
> +static void video_output_class_release(struct class_device *dev)
> +{
> + struct output_device *od = to_output_device(dev);
> + kfree(od);
> +}
> +
> +static struct class_device_attribute video_output_attributes[] = {
> + __ATTR(state, 0644, video_output_show_state, video_output_store_state),
> + __ATTR_NULL,
> +};
> +
> +static struct class video_output_class = {
> + .name = "video_output",
> + .release = video_output_class_release,
> + .class_dev_attrs = video_output_attributes,
> +};
> +
> +struct output_device *video_output_register(const char *name,
> + struct device *dev,
> + void *devdata,
> + struct output_properties *op)
> +{
> + struct output_device *new_dev;
> + int ret_code = 0;
> +
> + new_dev = kzalloc(sizeof(struct output_device),GFP_KERNEL);
> + if (!new_dev) {
> + ret_code = -ENOMEM;
> + goto error_return;
> + }
> + new_dev->props = op;
> + new_dev->class_dev.class = &video_output_class;
> + new_dev->class_dev.dev = dev;
> + strlcpy(new_dev->class_dev.class_id,name,KOBJ_NAME_LEN);
> + class_set_devdata(&new_dev->class_dev,devdata);
> + ret_code = class_device_register(&new_dev->class_dev);
> + if (ret_code) {
> + kfree(new_dev);
> + goto error_return;
> + }
> + return new_dev;
> +
> +error_return:
> + return ERR_PTR(ret_code);
> +}
> +EXPORT_SYMBOL(video_output_register);
> +
> +void video_output_unregister(struct output_device *dev)
> +{
> + if (!dev)
> + return;
> + class_device_unregister(&dev->class_dev);
> +}
> +EXPORT_SYMBOL(video_output_unregister);
> +
> +static void __exit video_output_class_exit(void)
> +{
> + class_unregister(&video_output_class);
> +}
> +
> +static int __init video_output_class_init(void)
> +{
> + return class_register(&video_output_class);
> +}
> +
> +postcore_initcall(video_output_class_init);
> +module_exit(video_output_class_exit);
> diff -puN /dev/null include/linux/video_output.h
> --- /dev/null
> +++ a/include/linux/video_output.h
> @@ -0,0 +1,42 @@
> +/*
> + *
> + * Copyright (C) 2006 Luming Yu <luming.yu@xxxxxxxxx>
> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + *
> + * 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.,
> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + */
> +#ifndef _LINUX_VIDEO_OUTPUT_H
> +#define _LINUX_VIDEO_OUTPUT_H
> +#include <linux/device.h>
> +struct output_device;
> +struct output_properties {
> + int (*set_state)(struct output_device *);
> + int (*get_status)(struct output_device *);
> +};
> +struct output_device {
> + int request_state;
> + struct output_properties *props;
> + struct class_device class_dev;
> +};
> +#define to_output_device(obj) container_of(obj, struct output_device, class_dev)
> +struct output_device *video_output_register(const char *name,
> + struct device *dev,
> + void *devdata,
> + struct output_properties *op);
> +void video_output_unregister(struct output_device *dev);
> +#endif
> _
> -
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