*
* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
* Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
+ * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/backlight.h>
#include <asm/uaccess.h>
#include <acpi/acpi_bus.h>
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
-#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x82
-#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x83
-#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x84
-#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x85
-#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x86
+#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
+#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
+#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
+#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
+#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
#define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
#define ACPI_VIDEO_HEAD_END (~0u)
+#define MAX_NAME_LEN 20
#define _COMPONENT ACPI_VIDEO_COMPONENT
ACPI_MODULE_NAME("acpi_video")
};
struct acpi_video_bus {
- acpi_handle handle;
struct acpi_device *device;
u8 dos_setting;
struct acpi_video_enumerated_device *attached_array;
u8 _ADR:1; /*Return the unique ID */
u8 _BCL:1; /*Query list of brightness control levels supported */
u8 _BCM:1; /*Set the brightness level */
+ u8 _BQC:1; /* Get current brightness level */
u8 _DDC:1; /*Return the EDID for this device */
u8 _DCS:1; /*Return status of output device */
u8 _DGS:1; /*Query graphics state */
u8 _DSS:1; /*Device state set */
- u8 _reserved:1;
};
struct acpi_video_device_brightness {
};
struct acpi_video_device {
- acpi_handle handle;
unsigned long device_id;
struct acpi_video_device_flags flags;
struct acpi_video_device_cap cap;
struct acpi_video_bus *video;
struct acpi_device *dev;
struct acpi_video_device_brightness *brightness;
+ struct backlight_device *backlight;
+ struct backlight_properties *data;
};
/* bus */
struct acpi_video_device *device);
static int acpi_video_device_enumerate(struct acpi_video_bus *video);
static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
+static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
+ int level);
+static int acpi_video_device_lcd_get_level_current(
+ struct acpi_video_device *device,
+ unsigned long *level);
static int acpi_video_get_next_level(struct acpi_video_device *device,
u32 level_current, u32 event);
static void acpi_video_switch_brightness(struct acpi_video_device *device,
int event);
+/*backlight device sysfs support*/
+static int acpi_video_get_brightness(struct backlight_device *bd)
+{
+ unsigned long cur_level;
+ struct acpi_video_device *vd =
+ (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
+ acpi_video_device_lcd_get_level_current(vd, &cur_level);
+ return (int) cur_level;
+}
+
+static int acpi_video_set_brightness(struct backlight_device *bd)
+{
+ int request_level = bd->props->brightness;
+ struct acpi_video_device *vd =
+ (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
+ acpi_video_device_lcd_set_level(vd, request_level);
+ return 0;
+}
+
/* --------------------------------------------------------------------------
Video Management
-------------------------------------------------------------------------- */
acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
{
int status;
- status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
+
+ status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
return status;
}
{
int status;
-
- status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
+ status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
return status;
}
arg0.integer.value = state;
- status = acpi_evaluate_integer(device->handle, "_DSS", &args, &ret);
+ status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
return status;
}
*levels = NULL;
- status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
+ status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
if (!ACPI_SUCCESS(status))
return status;
obj = (union acpi_object *)buffer.pointer;
arg0.integer.value = level;
- status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
+ status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
printk(KERN_DEBUG "set_level status: %x\n", status);
return status;
{
int status;
- status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
+ status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
return status;
}
else
return -EINVAL;
- status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
+ status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
if (ACPI_FAILURE(status))
return -ENODEV;
- obj = (union acpi_object *)buffer.pointer;
+ obj = buffer.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER)
*edid = obj;
arg0.integer.value = option;
- status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
+ status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
if (ACPI_SUCCESS(status))
status = tmp ? (-EINVAL) : (AE_OK);
{
int status;
-
- status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
+ status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
return status;
}
{
int status;
- status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
+ status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
*options &= 3;
return status;
}
arg0.integer.value = (lcd_flag << 2) | bios_flag;
video->dos_setting = arg0.integer.value;
- acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
+ acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
Failed:
return status;
acpi_integer status;
acpi_handle h_dummy1;
int i;
+ u32 max_level = 0;
union acpi_object *obj = NULL;
struct acpi_video_device_brightness *br = NULL;
memset(&device->cap, 0, 4);
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
device->cap._ADR = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
device->cap._BCL = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
device->cap._BCM = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
+ device->cap._BQC = 1;
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
device->cap._DDC = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
device->cap._DCS = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
device->cap._DGS = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
device->cap._DSS = 1;
}
int count = 0;
union acpi_object *o;
- br = kmalloc(sizeof(*br), GFP_KERNEL);
+ br = kzalloc(sizeof(*br), GFP_KERNEL);
if (!br) {
printk(KERN_ERR "can't allocate memory\n");
} else {
- memset(br, 0, sizeof(*br));
br->levels = kmalloc(obj->package.count *
sizeof *(br->levels), GFP_KERNEL);
if (!br->levels)
continue;
}
br->levels[count] = (u32) o->integer.value;
+ if (br->levels[count] > max_level)
+ max_level = br->levels[count];
count++;
}
out:
kfree(obj);
+ if (device->cap._BCL && device->cap._BCM && device->cap._BQC){
+ unsigned long tmp;
+ static int count = 0;
+ char *name;
+ struct backlight_properties *acpi_video_data;
+
+ name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+ if (!name)
+ return;
+
+ acpi_video_data = kzalloc(
+ sizeof(struct backlight_properties),
+ GFP_KERNEL);
+ if (!acpi_video_data){
+ kfree(name);
+ return;
+ }
+ acpi_video_data->owner = THIS_MODULE;
+ acpi_video_data->get_brightness =
+ acpi_video_get_brightness;
+ acpi_video_data->update_status =
+ acpi_video_set_brightness;
+ sprintf(name, "acpi_video%d", count++);
+ device->data = acpi_video_data;
+ acpi_video_data->max_brightness = max_level;
+ acpi_video_device_lcd_get_level_current(device, &tmp);
+ acpi_video_data->brightness = (int)tmp;
+ device->backlight = backlight_device_register(name,
+ NULL, device, acpi_video_data);
+ kfree(name);
+ }
return;
}
acpi_handle h_dummy1;
memset(&video->cap, 0, 4);
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
video->cap._DOS = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
video->cap._DOD = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
video->cap._ROM = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
video->cap._GPD = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
video->cap._SPD = 1;
}
- if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
+ if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
video->cap._VPO = 1;
}
}
static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
if (!dev)
static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
{
int status;
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
unsigned long state;
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_device *dev = m->private;
char str[12] = { 0 };
u32 state = 0;
static int
acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
int i;
const char __user * buffer,
size_t count, loff_t * data)
{
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_device *dev = m->private;
char str[4] = { 0 };
unsigned int level = 0;
int i;
static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_device *dev =
- (struct acpi_video_device *)seq->private;
+ struct acpi_video_device *dev = seq->private;
int status;
int i;
union acpi_object *edid = NULL;
if (!device)
return -ENODEV;
- vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+ vid_dev = acpi_driver_data(device);
if (!vid_dev)
return -ENODEV;
{
struct acpi_video_device *vid_dev;
- vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
+ vid_dev = acpi_driver_data(device);
if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
return -ENODEV;
/* video bus */
static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
if (!video)
static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
if (!video)
static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
unsigned long options;
int status;
static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
int status;
unsigned long id;
static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
+ struct acpi_video_bus *video = seq->private;
seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_bus *video = m->private;
char str[12] = { 0 };
unsigned long opt, options;
size_t count, loff_t * data)
{
int status;
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
+ struct seq_file *m = file->private_data;
+ struct acpi_video_bus *video = m->private;
char str[12] = { 0 };
unsigned long opt;
struct acpi_video_bus *video;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
if (!acpi_device_dir(device)) {
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
struct acpi_video_bus *video;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
if (acpi_device_dir(device)) {
remove_proc_entry("info", acpi_device_dir(device));
acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
if (ACPI_SUCCESS(status)) {
- data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
if (!data)
return -ENOMEM;
- memset(data, 0, sizeof(struct acpi_video_device));
-
- data->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
acpi_driver_data(device) = data;
acpi_video_device_bind(video, data);
acpi_video_device_find_cap(data);
- status = acpi_install_notify_handler(data->handle,
+ status = acpi_install_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_device_notify,
data);
union acpi_object *dod = NULL;
union acpi_object *obj;
-
- status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
+ status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
if (!ACPI_SUCCESS(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
return status;
}
- dod = (union acpi_object *)buffer.pointer;
+ dod = buffer.pointer;
if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
status = -EFAULT;
count = 0;
for (i = 0; i < dod->package.count; i++) {
- obj = (union acpi_object *)&dod->package.elements[i];
+ obj = &dod->package.elements[i];
if (obj->type != ACPI_TYPE_INTEGER) {
printk(KERN_ERR PREFIX "Invalid _DOD data\n");
video->attached_array = active_device_list;
video->attached_count = count;
out:
- acpi_os_free(buffer.pointer);
+ kfree(buffer.pointer);
return status;
}
acpi_video_get_next_level(struct acpi_video_device *device,
u32 level_current, u32 event)
{
- /*Fix me */
- return level_current;
+ int min, max, min_above, max_below, i, l;
+ max = max_below = 0;
+ min = min_above = 255;
+ for (i = 0; i < device->brightness->count; i++) {
+ l = device->brightness->levels[i];
+ if (l < min)
+ min = l;
+ if (l > max)
+ max = l;
+ if (l < min_above && l > level_current)
+ min_above = l;
+ if (l > max_below && l < level_current)
+ max_below = l;
+ }
+
+ switch (event) {
+ case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
+ return (level_current < max) ? min_above : min;
+ case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
+ return (level_current < max) ? min_above : max;
+ case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
+ return (level_current > min) ? max_below : min;
+ case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
+ case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
+ return 0;
+ default:
+ return level_current;
+ }
}
static void
up(&video->sem);
acpi_video_device_remove_fs(device->dev);
- status = acpi_remove_notify_handler(device->handle,
+ status = acpi_remove_notify_handler(device->dev->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_device_notify);
-
+ if (device->backlight){
+ backlight_device_unregister(device->backlight);
+ kfree(device->data);
+ }
return 0;
}
static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_video_bus *video = (struct acpi_video_bus *)data;
+ struct acpi_video_bus *video = data;
struct acpi_device *device = NULL;
printk("video bus notify\n");
static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_video_device *video_device =
- (struct acpi_video_device *)data;
+ struct acpi_video_device *video_device = data;
struct acpi_device *device = NULL;
-
- printk("video device notify\n");
if (!video_device)
return;
if (!device)
return -EINVAL;
- video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
+ video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
if (!video)
return -ENOMEM;
- memset(video, 0, sizeof(struct acpi_video_bus));
- video->handle = device->handle;
video->device = device;
strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
acpi_video_bus_get_devices(video, device);
acpi_video_bus_start_devices(video);
- status = acpi_install_notify_handler(video->handle,
+ status = acpi_install_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify, video);
if (ACPI_FAILURE(status)) {
if (!device || !acpi_driver_data(device))
return -EINVAL;
- video = (struct acpi_video_bus *)acpi_driver_data(device);
+ video = acpi_driver_data(device);
acpi_video_bus_stop_devices(video);
- status = acpi_remove_notify_handler(video->handle,
+ status = acpi_remove_notify_handler(video->device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify);
projects / linux-drm-fsl-dcu.git / blobdiff