fbdev: remove display subsystem
This four year old subsystem does not have a single in-tree user not even in staging and as far as I know also none out-of-tree. I think that justifies removing it which cleans the config up. Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Acked-by: James Simmons <jsimmons@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org>hifive-unleashed-5.1
Florian Tobias Schandinat
parent
b57287ba49
commit
5a6b5e02d6
|
|
@ -2413,7 +2413,6 @@ source "drivers/video/omap/Kconfig"
|
|||
source "drivers/video/omap2/Kconfig"
|
||||
|
||||
source "drivers/video/backlight/Kconfig"
|
||||
source "drivers/video/display/Kconfig"
|
||||
|
||||
if VT
|
||||
source "drivers/video/console/Kconfig"
|
||||
|
|
|
|||
|
|
@ -13,7 +13,7 @@ fb-objs := $(fb-y)
|
|||
|
||||
obj-$(CONFIG_VT) += console/
|
||||
obj-$(CONFIG_LOGO) += logo/
|
||||
obj-y += backlight/ display/
|
||||
obj-y += backlight/
|
||||
|
||||
obj-$(CONFIG_FB_CFB_FILLRECT) += cfbfillrect.o
|
||||
obj-$(CONFIG_FB_CFB_COPYAREA) += cfbcopyarea.o
|
||||
|
|
|
|||
|
|
@ -1,24 +0,0 @@
|
|||
#
|
||||
# Display drivers configuration
|
||||
#
|
||||
|
||||
menu "Display device support"
|
||||
|
||||
config DISPLAY_SUPPORT
|
||||
tristate "Display panel/monitor support"
|
||||
---help---
|
||||
This framework adds support for low-level control of a display.
|
||||
This includes support for power.
|
||||
|
||||
Enable this to be able to choose the drivers for controlling the
|
||||
physical display panel/monitor on some platforms. This not only
|
||||
covers LCD displays for PDAs but also other types of displays
|
||||
such as CRT, TVout etc.
|
||||
|
||||
To have support for your specific display panel you will have to
|
||||
select the proper drivers which depend on this option.
|
||||
|
||||
comment "Display hardware drivers"
|
||||
depends on DISPLAY_SUPPORT
|
||||
|
||||
endmenu
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
# Display drivers
|
||||
|
||||
display-objs := display-sysfs.o
|
||||
|
||||
obj-$(CONFIG_DISPLAY_SUPPORT) += display.o
|
||||
|
||||
|
|
@ -1,219 +0,0 @@
|
|||
/*
|
||||
* display-sysfs.c - Display output driver sysfs interface
|
||||
*
|
||||
* Copyright (C) 2007 James Simmons <jsimmons@infradead.org>
|
||||
*
|
||||
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
*
|
||||
* 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/display.h>
|
||||
#include <linux/ctype.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/kdev_t.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
static ssize_t display_show_name(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
return snprintf(buf, PAGE_SIZE, "%s\n", dsp->name);
|
||||
}
|
||||
|
||||
static ssize_t display_show_type(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
return snprintf(buf, PAGE_SIZE, "%s\n", dsp->type);
|
||||
}
|
||||
|
||||
static ssize_t display_show_contrast(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
ssize_t rc = -ENXIO;
|
||||
|
||||
mutex_lock(&dsp->lock);
|
||||
if (likely(dsp->driver) && dsp->driver->get_contrast)
|
||||
rc = sprintf(buf, "%d\n", dsp->driver->get_contrast(dsp));
|
||||
mutex_unlock(&dsp->lock);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static ssize_t display_store_contrast(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
ssize_t ret = -EINVAL, size;
|
||||
int contrast;
|
||||
char *endp;
|
||||
|
||||
contrast = simple_strtoul(buf, &endp, 0);
|
||||
size = endp - buf;
|
||||
|
||||
if (isspace(*endp))
|
||||
size++;
|
||||
|
||||
if (size != count)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&dsp->lock);
|
||||
if (likely(dsp->driver && dsp->driver->set_contrast)) {
|
||||
pr_debug("display: set contrast to %d\n", contrast);
|
||||
dsp->driver->set_contrast(dsp, contrast);
|
||||
ret = count;
|
||||
}
|
||||
mutex_unlock(&dsp->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t display_show_max_contrast(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
ssize_t rc = -ENXIO;
|
||||
|
||||
mutex_lock(&dsp->lock);
|
||||
if (likely(dsp->driver))
|
||||
rc = sprintf(buf, "%d\n", dsp->driver->max_contrast);
|
||||
mutex_unlock(&dsp->lock);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static struct device_attribute display_attrs[] = {
|
||||
__ATTR(name, S_IRUGO, display_show_name, NULL),
|
||||
__ATTR(type, S_IRUGO, display_show_type, NULL),
|
||||
__ATTR(contrast, S_IRUGO | S_IWUSR, display_show_contrast, display_store_contrast),
|
||||
__ATTR(max_contrast, S_IRUGO, display_show_max_contrast, NULL),
|
||||
};
|
||||
|
||||
static int display_suspend(struct device *dev, pm_message_t state)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&dsp->lock);
|
||||
if (likely(dsp->driver->suspend))
|
||||
dsp->driver->suspend(dsp, state);
|
||||
mutex_unlock(&dsp->lock);
|
||||
return 0;
|
||||
};
|
||||
|
||||
static int display_resume(struct device *dev)
|
||||
{
|
||||
struct display_device *dsp = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&dsp->lock);
|
||||
if (likely(dsp->driver->resume))
|
||||
dsp->driver->resume(dsp);
|
||||
mutex_unlock(&dsp->lock);
|
||||
return 0;
|
||||
};
|
||||
|
||||
static struct mutex allocated_dsp_lock;
|
||||
static DEFINE_IDR(allocated_dsp);
|
||||
static struct class *display_class;
|
||||
|
||||
struct display_device *display_device_register(struct display_driver *driver,
|
||||
struct device *parent, void *devdata)
|
||||
{
|
||||
struct display_device *new_dev = NULL;
|
||||
int ret = -EINVAL;
|
||||
|
||||
if (unlikely(!driver))
|
||||
return ERR_PTR(ret);
|
||||
|
||||
mutex_lock(&allocated_dsp_lock);
|
||||
ret = idr_pre_get(&allocated_dsp, GFP_KERNEL);
|
||||
mutex_unlock(&allocated_dsp_lock);
|
||||
if (!ret)
|
||||
return ERR_PTR(ret);
|
||||
|
||||
new_dev = kzalloc(sizeof(struct display_device), GFP_KERNEL);
|
||||
if (likely(new_dev) && unlikely(driver->probe(new_dev, devdata))) {
|
||||
// Reserve the index for this display
|
||||
mutex_lock(&allocated_dsp_lock);
|
||||
ret = idr_get_new(&allocated_dsp, new_dev, &new_dev->idx);
|
||||
mutex_unlock(&allocated_dsp_lock);
|
||||
|
||||
if (!ret) {
|
||||
new_dev->dev = device_create(display_class, parent,
|
||||
MKDEV(0, 0), new_dev,
|
||||
"display%d", new_dev->idx);
|
||||
if (!IS_ERR(new_dev->dev)) {
|
||||
new_dev->parent = parent;
|
||||
new_dev->driver = driver;
|
||||
mutex_init(&new_dev->lock);
|
||||
return new_dev;
|
||||
}
|
||||
mutex_lock(&allocated_dsp_lock);
|
||||
idr_remove(&allocated_dsp, new_dev->idx);
|
||||
mutex_unlock(&allocated_dsp_lock);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
}
|
||||
kfree(new_dev);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL(display_device_register);
|
||||
|
||||
void display_device_unregister(struct display_device *ddev)
|
||||
{
|
||||
if (!ddev)
|
||||
return;
|
||||
// Free device
|
||||
mutex_lock(&ddev->lock);
|
||||
device_unregister(ddev->dev);
|
||||
mutex_unlock(&ddev->lock);
|
||||
// Mark device index as available
|
||||
mutex_lock(&allocated_dsp_lock);
|
||||
idr_remove(&allocated_dsp, ddev->idx);
|
||||
mutex_unlock(&allocated_dsp_lock);
|
||||
kfree(ddev);
|
||||
}
|
||||
EXPORT_SYMBOL(display_device_unregister);
|
||||
|
||||
static int __init display_class_init(void)
|
||||
{
|
||||
display_class = class_create(THIS_MODULE, "display");
|
||||
if (IS_ERR(display_class)) {
|
||||
printk(KERN_ERR "Failed to create display class\n");
|
||||
display_class = NULL;
|
||||
return -EINVAL;
|
||||
}
|
||||
display_class->dev_attrs = display_attrs;
|
||||
display_class->suspend = display_suspend;
|
||||
display_class->resume = display_resume;
|
||||
mutex_init(&allocated_dsp_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit display_class_exit(void)
|
||||
{
|
||||
class_destroy(display_class);
|
||||
}
|
||||
|
||||
module_init(display_class_init);
|
||||
module_exit(display_class_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Display Hardware handling");
|
||||
MODULE_AUTHOR("James Simmons <jsimmons@infradead.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
|
|
@ -1,61 +0,0 @@
|
|||
/*
|
||||
* Copyright (C) 2006 James Simmons <jsimmons@infradead.org>
|
||||
*
|
||||
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
*
|
||||
* 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_DISPLAY_H
|
||||
#define _LINUX_DISPLAY_H
|
||||
|
||||
#include <linux/device.h>
|
||||
|
||||
struct display_device;
|
||||
|
||||
/* This structure defines all the properties of a Display. */
|
||||
struct display_driver {
|
||||
int (*set_contrast)(struct display_device *, unsigned int);
|
||||
int (*get_contrast)(struct display_device *);
|
||||
void (*suspend)(struct display_device *, pm_message_t state);
|
||||
void (*resume)(struct display_device *);
|
||||
int (*probe)(struct display_device *, void *);
|
||||
int (*remove)(struct display_device *);
|
||||
int max_contrast;
|
||||
};
|
||||
|
||||
struct display_device {
|
||||
struct module *owner; /* Owner module */
|
||||
struct display_driver *driver;
|
||||
struct device *parent; /* This is the parent */
|
||||
struct device *dev; /* This is this display device */
|
||||
struct mutex lock;
|
||||
void *priv_data;
|
||||
char type[16];
|
||||
char *name;
|
||||
int idx;
|
||||
};
|
||||
|
||||
extern struct display_device *display_device_register(struct display_driver *driver,
|
||||
struct device *dev, void *devdata);
|
||||
extern void display_device_unregister(struct display_device *dev);
|
||||
|
||||
extern int probe_edid(struct display_device *dev, void *devdata);
|
||||
|
||||
#define to_display_device(obj) container_of(obj, struct display_device, class_dev)
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue