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ACPI video hotkey: export missing ACPI video hotkey events via input …
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…layer

Signed-off-by: Yu Luming <luming.yu@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Luming Yu authored and Len Brown committed Aug 25, 2007
1 parent a1eb96a commit e9dab19
Showing 1 changed file with 88 additions and 1 deletion.
89 changes: 88 additions & 1 deletion drivers/acpi/video.c
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

#include <linux/input.h>
#include <linux/backlight.h>
#include <linux/video_output.h>
#include <asm/uaccess.h>
Expand Down Expand Up @@ -138,6 +138,8 @@ struct acpi_video_bus {
struct semaphore sem;
struct list_head video_device_list;
struct proc_dir_entry *dir;
struct input_dev *input;
char phys[32]; /* for input device */
};

struct acpi_video_device_flags {
Expand Down Expand Up @@ -1764,18 +1766,23 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_video_bus *video = data;
struct acpi_device *device = NULL;
struct input_dev *input;
int keycode;


printk("video bus notify\n");

if (!video)
return;

device = video->device;
input = video->input;

switch (event) {
case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
* most likely via hotkey. */
acpi_bus_generate_event(device, event, 0);
keycode = KEY_SWITCHVIDEOMODE;
break;

case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
Expand All @@ -1784,48 +1791,93 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
acpi_video_device_rebind(video);
acpi_video_switch_output(video, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_SWITCHVIDEOMODE;
break;

case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
acpi_video_switch_output(video, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_SWITCHVIDEOMODE;
break;
case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
acpi_video_switch_output(video, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_VIDEO_NEXT;
break;
case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
acpi_video_switch_output(video, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_VIDEO_PREV;
break;

default:
keycode = KEY_UNKNOWN;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}

input_report_key(input, keycode, 1);
input_sync(input);
input_report_key(input, keycode, 0);
input_sync(input);

return;
}

static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_video_device *video_device = data;
struct acpi_device *device = NULL;
struct acpi_video_bus *bus;
struct input_dev *input;
int keycode;

if (!video_device)
return;

device = video_device->dev;
bus = video_device->video;
input = bus->input;

switch (event) {
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_BRIGHTNESS_CYCLE;
break;
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_BRIGHTNESSUP;
break;
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_BRIGHTNESSDOWN;
break;
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_BRIGHTNESS_ZERO;
break;
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_event(device, event, 0);
keycode = KEY_DISPLAY_OFF;
break;
default:
keycode = KEY_UNKNOWN;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}

input_report_key(input, keycode, 1);
input_sync(input);
input_report_key(input, keycode, 0);
input_sync(input);

return;
}

Expand All @@ -1834,6 +1886,7 @@ static int acpi_video_bus_add(struct acpi_device *device)
int result = 0;
acpi_status status = 0;
struct acpi_video_bus *video = NULL;
struct input_dev *input;


if (!device)
Expand Down Expand Up @@ -1877,6 +1930,39 @@ static int acpi_video_bus_add(struct acpi_device *device)
goto end;
}


video->input = input = input_allocate_device();

snprintf(video->phys, sizeof(video->phys),
"%s/video/input0", acpi_device_hid(video->device));

input->name = acpi_device_name(video->device);
input->phys = video->phys;
input->id.bustype = BUS_HOST;
input->id.product = 0x06;
input->evbit[0] = BIT(EV_KEY);
set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
set_bit(KEY_VIDEO_NEXT, input->keybit);
set_bit(KEY_VIDEO_PREV, input->keybit);
set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
set_bit(KEY_BRIGHTNESSUP, input->keybit);
set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
set_bit(KEY_DISPLAY_OFF, input->keybit);
set_bit(KEY_UNKNOWN, input->keybit);
result = input_register_device(input);
if (result) {
acpi_remove_notify_handler(video->device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify);
acpi_video_bus_stop_devices(video);
acpi_video_bus_put_devices(video);
kfree(video->attached_array);
acpi_video_bus_remove_fs(device);
goto end;
}


printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
video->flags.multihead ? "yes" : "no",
Expand Down Expand Up @@ -1910,6 +1996,7 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
acpi_video_bus_put_devices(video);
acpi_video_bus_remove_fs(device);

input_unregister_device(video->input);
kfree(video->attached_array);
kfree(video);

Expand Down

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