ACPI video hotkey: export missing ACPI video hotkey events via input 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>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 8efdea5..d727d2c 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -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>
@@ -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 {
@@ -1764,6 +1766,9 @@ 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");
 
@@ -1771,11 +1776,13 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
                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
@@ -1784,21 +1791,37 @@ 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;
 }
 
@@ -1806,26 +1829,55 @@ 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;
 }
 
@@ -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)
@@ -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",
@@ -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);