Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 35 insertions, 870 deletions

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 67dec0c675aa..db39e9e607d8 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -30,12 +30,9 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
 #include <linux/input.h>
 #include <linux/backlight.h>
 #include <linux/thermal.h>
-#include <linux/video_output.h>
 #include <linux/sort.h>
 #include <linux/pci.h>
 #include <linux/pci_ids.h>
@@ -83,6 +80,13 @@ module_param(brightness_switch_enabled, bool, 0644);
 static int allow_duplicates;
 module_param(allow_duplicates, bool, 0644);
 
+/*
+ * Some BIOSes claim they use minimum backlight at boot,
+ * and this may bring dimming screen after boot
+ */
+static int use_bios_initial_backlight = 1;
+module_param(use_bios_initial_backlight, bool, 0644);
+
 static int register_count = 0;
 static int acpi_video_bus_add(struct acpi_device *device);
 static int acpi_video_bus_remove(struct acpi_device *device, int type);
@@ -152,9 +156,6 @@ struct acpi_video_bus {
         struct acpi_video_bus_flags flags;
         struct list_head video_device_list;
         struct mutex device_list_lock;  /* protects video_device_list */
-#ifdef CONFIG_ACPI_PROCFS
-        struct proc_dir_entry *dir;
-#endif
         struct input_dev *input;
         char phys[32];  /* for input device */
         struct notifier_block pm_nb;
@@ -177,9 +178,6 @@ struct acpi_video_device_cap {
         u8 _BQC:1;              /* Get current brightness level */
         u8 _BCQ:1;              /* Some buggy BIOS uses _BCQ instead of _BQC */
         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 */
 };
 
 struct acpi_video_brightness_flags {
@@ -207,110 +205,7 @@ struct acpi_video_device {
         struct acpi_video_device_brightness *brightness;
         struct backlight_device *backlight;
         struct thermal_cooling_device *cooling_dev;
-        struct output_device *output_dev;
-};
-
-#ifdef CONFIG_ACPI_PROCFS
-/* bus */
-static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
-static const struct file_operations acpi_video_bus_info_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_bus_info_open_fs,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
-static const struct file_operations acpi_video_bus_ROM_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_bus_ROM_open_fs,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
-                                            struct file *file);
-static const struct file_operations acpi_video_bus_POST_info_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_bus_POST_info_open_fs,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
-static ssize_t acpi_video_bus_write_POST(struct file *file,
-        const char __user *buffer, size_t count, loff_t *data);
-static const struct file_operations acpi_video_bus_POST_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_bus_POST_open_fs,
-        .read = seq_read,
-        .write = acpi_video_bus_write_POST,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
-static ssize_t acpi_video_bus_write_DOS(struct file *file,
-        const char __user *buffer, size_t count, loff_t *data);
-static const struct file_operations acpi_video_bus_DOS_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_bus_DOS_open_fs,
-        .read = seq_read,
-        .write = acpi_video_bus_write_DOS,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-/* device */
-static int acpi_video_device_info_open_fs(struct inode *inode,
-                                          struct file *file);
-static const struct file_operations acpi_video_device_info_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_device_info_open_fs,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_device_state_open_fs(struct inode *inode,
-                                           struct file *file);
-static ssize_t acpi_video_device_write_state(struct file *file,
-        const char __user *buffer, size_t count, loff_t *data);
-static const struct file_operations acpi_video_device_state_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_device_state_open_fs,
-        .read = seq_read,
-        .write = acpi_video_device_write_state,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_device_brightness_open_fs(struct inode *inode,
-                                                struct file *file);
-static ssize_t acpi_video_device_write_brightness(struct file *file,
-        const char __user *buffer, size_t count, loff_t *data);
-static const struct file_operations acpi_video_device_brightness_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_device_brightness_open_fs,
-        .read = seq_read,
-        .write = acpi_video_device_write_brightness,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
-
-static int acpi_video_device_EDID_open_fs(struct inode *inode,
-                                          struct file *file);
-static const struct file_operations acpi_video_device_EDID_fops = {
-        .owner = THIS_MODULE,
-        .open = acpi_video_device_EDID_open_fs,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
 };
-#endif /* CONFIG_ACPI_PROCFS */
 
 static const char device_decode[][30] = {
         "motherboard VGA device",
@@ -333,10 +228,6 @@ static int acpi_video_get_next_level(struct acpi_video_device *device,
                                      u32 level_current, u32 event);
 static int acpi_video_switch_brightness(struct acpi_video_device *device,
                                          int event);
-static int acpi_video_device_get_state(struct acpi_video_device *device,
-                            unsigned long long *state);
-static int acpi_video_output_get(struct output_device *od);
-static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 
 /*backlight device sysfs support*/
 static int acpi_video_get_brightness(struct backlight_device *bd)
@@ -367,35 +258,11 @@ static int acpi_video_set_brightness(struct backlight_device *bd)
                                 vd->brightness->levels[request_level]);
 }
 
-static struct backlight_ops acpi_backlight_ops = {
+static const struct backlight_ops acpi_backlight_ops = {
         .get_brightness = acpi_video_get_brightness,
         .update_status  = acpi_video_set_brightness,
 };
 
-/*video output device sysfs support*/
-static int acpi_video_output_get(struct output_device *od)
-{
-        unsigned long long state;
-        struct acpi_video_device *vd =
-                (struct acpi_video_device *)dev_get_drvdata(&od->dev);
-        acpi_video_device_get_state(vd, &state);
-        return (int)state;
-}
-
-static int acpi_video_output_set(struct output_device *od)
-{
-        unsigned long state = od->request_state;
-        struct acpi_video_device *vd=
-                (struct acpi_video_device *)dev_get_drvdata(&od->dev);
-        return acpi_video_device_set_state(vd, state);
-}
-
-static struct output_properties acpi_output_properties = {
-        .set_state = acpi_video_output_set,
-        .get_status = acpi_video_output_get,
-};
-
-
 /* thermal cooling device callbacks */
 static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
                                long *state)
@@ -451,34 +318,6 @@ static struct thermal_cooling_device_ops video_cooling_ops = {
                                Video Management
    -------------------------------------------------------------------------- */
 
-/* device */
-
-static int
-acpi_video_device_get_state(struct acpi_video_device *device,
-                            unsigned long long *state)
-{
-        int status;
-
-        status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
-
-        return status;
-}
-
-static int
-acpi_video_device_set_state(struct acpi_video_device *device, int state)
-{
-        int status;
-        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
-        struct acpi_object_list args = { 1, &arg0 };
-        unsigned long long ret;
-
-
-        arg0.integer.value = state;
-        status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
-
-        return status;
-}
-
 static int
 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
                                    union acpi_object **levels)
@@ -873,9 +712,11 @@ acpi_video_init_brightness(struct acpi_video_device *device)
                  * when invoked for the first time, i.e. level_old is invalid.
                  * set the backlight to max_level in this case
                  */
-                for (i = 2; i < br->count; i++)
-                        if (level_old == br->levels[i])
-                                level = level_old;
+                if (use_bios_initial_backlight) {
+                        for (i = 2; i < br->count; i++)
+                                if (level_old == br->levels[i])
+                                        level = level_old;
+                }
                 goto set_level;
         }
 
@@ -938,18 +779,12 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
                 device->cap._DDC = 1;
         }
-        if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
-                device->cap._DCS = 1;
-        }
-        if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
-                device->cap._DGS = 1;
-        }
-        if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
-                device->cap._DSS = 1;
-        }
 
         if (acpi_video_backlight_support()) {
                 struct backlight_properties props;
+                struct pci_dev *pdev;
+                acpi_handle acpi_parent;
+                struct device *parent = NULL;
                 int result;
                 static int count = 0;
                 char *name;
@@ -962,9 +797,20 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         return;
                 count++;
 
+                acpi_get_parent(device->dev->handle, &acpi_parent);
+
+                pdev = acpi_get_pci_dev(acpi_parent);
+                if (pdev) {
+                        parent = &pdev->dev;
+                        pci_dev_put(pdev);
+                }
+
                 memset(&props, 0, sizeof(struct backlight_properties));
+                props.type = BACKLIGHT_FIRMWARE;
                 props.max_brightness = device->brightness->count - 3;
-                device->backlight = backlight_device_register(name, NULL, device,
+                device->backlight = backlight_device_register(name,
+                                                              parent,
+                                                              device,
                                                               &acpi_backlight_ops,
                                                               &props);
                 kfree(name);
@@ -978,11 +824,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                 device->backlight->props.brightness =
                                 acpi_video_get_brightness(device->backlight);
 
-                result = sysfs_create_link(&device->backlight->dev.kobj,
-                                           &device->dev->dev.kobj, "device");
-                if (result)
-                        printk(KERN_ERR PREFIX "Create sysfs link\n");
-
                 device->cooling_dev = thermal_cooling_device_register("LCD",
                                         device->dev, &video_cooling_ops);
                 if (IS_ERR(device->cooling_dev)) {
@@ -1011,21 +852,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 
         }
-
-        if (acpi_video_display_switch_support()) {
-
-                if (device->cap._DCS && device->cap._DSS) {
-                        static int count;
-                        char *name;
-                        name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
-                        if (!name)
-                                return;
-                        count++;
-                        device->output_dev = video_output_register(name,
-                                        NULL, device, &acpi_output_properties);
-                        kfree(name);
-                }
-        }
 }
 
 /*
@@ -1111,646 +937,6 @@ static int acpi_video_bus_check(struct acpi_video_bus *video)
 }
 
 /* --------------------------------------------------------------------------
-                              FS Interface (/proc)
-   -------------------------------------------------------------------------- */
-#ifdef CONFIG_ACPI_PROCFS
-
-static struct proc_dir_entry *acpi_video_dir;
-
-/* video devices */
-
-static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_device *dev = seq->private;
-
-
-        if (!dev)
-                goto end;
-
-        seq_printf(seq, "device_id:    0x%04x\n", (u32) dev->device_id);
-        seq_printf(seq, "type:         ");
-        if (dev->flags.crt)
-                seq_printf(seq, "CRT\n");
-        else if (dev->flags.lcd)
-                seq_printf(seq, "LCD\n");
-        else if (dev->flags.tvout)
-                seq_printf(seq, "TVOUT\n");
-        else if (dev->flags.dvi)
-                seq_printf(seq, "DVI\n");
-        else
-                seq_printf(seq, "UNKNOWN\n");
-
-        seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
-
-      end:
-        return 0;
-}
-
-static int
-acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_device_info_seq_show,
-                           PDE(inode)->data);
-}
-
-static int
-acpi_video_device_query(struct acpi_video_device *device,
-                        unsigned long long *state)
-{
-        int status;
-
-        status = acpi_evaluate_integer(device->dev->handle, "_DGS",
-                                       NULL, state);
-
-        return status;
-}
-
-static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
-{
-        int status;
-        struct acpi_video_device *dev = seq->private;
-        unsigned long long state;
-
-
-        if (!dev)
-                goto end;
-
-        status = acpi_video_device_get_state(dev, &state);
-        seq_printf(seq, "state:     ");
-        if (ACPI_SUCCESS(status))
-                seq_printf(seq, "0x%02llx\n", state);
-        else
-                seq_printf(seq, "<not supported>\n");
-
-        status = acpi_video_device_query(dev, &state);
-        seq_printf(seq, "query:     ");
-        if (ACPI_SUCCESS(status))
-                seq_printf(seq, "0x%02llx\n", state);
-        else
-                seq_printf(seq, "<not supported>\n");
-
-      end:
-        return 0;
-}
-
-static int
-acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_device_state_seq_show,
-                           PDE(inode)->data);
-}
-
-static ssize_t
-acpi_video_device_write_state(struct file *file,
-                              const char __user * buffer,
-                              size_t count, loff_t * data)
-{
-        int status;
-        struct seq_file *m = file->private_data;
-        struct acpi_video_device *dev = m->private;
-        char str[12] = { 0 };
-        u32 state = 0;
-
-
-        if (!dev || count >= sizeof(str))
-                return -EINVAL;
-
-        if (copy_from_user(str, buffer, count))
-                return -EFAULT;
-
-        str[count] = 0;
-        state = simple_strtoul(str, NULL, 0);
-        state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
-
-        status = acpi_video_device_set_state(dev, state);
-
-        if (status)
-                return -EFAULT;
-
-        return count;
-}
-
-static int
-acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_device *dev = seq->private;
-        int i;
-
-
-        if (!dev || !dev->brightness) {
-                seq_printf(seq, "<not supported>\n");
-                return 0;
-        }
-
-        seq_printf(seq, "levels: ");
-        for (i = 2; i < dev->brightness->count; i++)
-                seq_printf(seq, " %d", dev->brightness->levels[i]);
-        seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
-
-        return 0;
-}
-
-static int
-acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_device_brightness_seq_show,
-                           PDE(inode)->data);
-}
-
-static ssize_t
-acpi_video_device_write_brightness(struct file *file,
-                                   const char __user * buffer,
-                                   size_t count, loff_t * data)
-{
-        struct seq_file *m = file->private_data;
-        struct acpi_video_device *dev = m->private;
-        char str[5] = { 0 };
-        unsigned int level = 0;
-        int i;
-
-
-        if (!dev || !dev->brightness || count >= sizeof(str))
-                return -EINVAL;
-
-        if (copy_from_user(str, buffer, count))
-                return -EFAULT;
-
-        str[count] = 0;
-        level = simple_strtoul(str, NULL, 0);
-
-        if (level > 100)
-                return -EFAULT;
-
-        /* validate through the list of available levels */
-        for (i = 2; i < dev->brightness->count; i++)
-                if (level == dev->brightness->levels[i]) {
-                        if (!acpi_video_device_lcd_set_level(dev, level))
-                                return count;
-                        break;
-                }
-
-        return -EINVAL;
-}
-
-static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_device *dev = seq->private;
-        int status;
-        int i;
-        union acpi_object *edid = NULL;
-
-
-        if (!dev)
-                goto out;
-
-        status = acpi_video_device_EDID(dev, &edid, 128);
-        if (ACPI_FAILURE(status)) {
-                status = acpi_video_device_EDID(dev, &edid, 256);
-        }
-
-        if (ACPI_FAILURE(status)) {
-                goto out;
-        }
-
-        if (edid && edid->type == ACPI_TYPE_BUFFER) {
-                for (i = 0; i < edid->buffer.length; i++)
-                        seq_putc(seq, edid->buffer.pointer[i]);
-        }
-
-      out:
-        if (!edid)
-                seq_printf(seq, "<not supported>\n");
-        else
-                kfree(edid);
-
-        return 0;
-}
-
-static int
-acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_device_EDID_seq_show,
-                           PDE(inode)->data);
-}
-
-static int acpi_video_device_add_fs(struct acpi_device *device)
-{
-        struct proc_dir_entry *entry, *device_dir;
-        struct acpi_video_device *vid_dev;
-
-        vid_dev = acpi_driver_data(device);
-        if (!vid_dev)
-                return -ENODEV;
-
-        device_dir = proc_mkdir(acpi_device_bid(device),
-                                vid_dev->video->dir);
-        if (!device_dir)
-                return -ENOMEM;
-
-        /* 'info' [R] */
-        entry = proc_create_data("info", S_IRUGO, device_dir,
-                        &acpi_video_device_info_fops, acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_dir;
-
-        /* 'state' [R/W] */
-        entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
-                                 device_dir,
-                                 &acpi_video_device_state_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_info;
-
-        /* 'brightness' [R/W] */
-        entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
-                                 device_dir,
-                                 &acpi_video_device_brightness_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_state;
-
-        /* 'EDID' [R] */
-        entry = proc_create_data("EDID", S_IRUGO, device_dir,
-                                 &acpi_video_device_EDID_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_brightness;
-
-        acpi_device_dir(device) = device_dir;
-
-        return 0;
-
- err_remove_brightness:
-        remove_proc_entry("brightness", device_dir);
- err_remove_state:
-        remove_proc_entry("state", device_dir);
- err_remove_info:
-        remove_proc_entry("info", device_dir);
- err_remove_dir:
-        remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
-        return -ENOMEM;
-}
-
-static int acpi_video_device_remove_fs(struct acpi_device *device)
-{
-        struct acpi_video_device *vid_dev;
-        struct proc_dir_entry *device_dir;
-
-        vid_dev = acpi_driver_data(device);
-        if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
-                return -ENODEV;
-
-        device_dir = acpi_device_dir(device);
-        if (device_dir) {
-                remove_proc_entry("info", device_dir);
-                remove_proc_entry("state", device_dir);
-                remove_proc_entry("brightness", device_dir);
-                remove_proc_entry("EDID", device_dir);
-                remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
-                acpi_device_dir(device) = NULL;
-        }
-
-        return 0;
-}
-
-/* video bus */
-static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_bus *video = seq->private;
-
-
-        if (!video)
-                goto end;
-
-        seq_printf(seq, "Switching heads:              %s\n",
-                   video->flags.multihead ? "yes" : "no");
-        seq_printf(seq, "Video ROM:                    %s\n",
-                   video->flags.rom ? "yes" : "no");
-        seq_printf(seq, "Device to be POSTed on boot:  %s\n",
-                   video->flags.post ? "yes" : "no");
-
-      end:
-        return 0;
-}
-
-static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_bus_info_seq_show,
-                           PDE(inode)->data);
-}
-
-static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_bus *video = seq->private;
-
-
-        if (!video)
-                goto end;
-
-        printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
-        seq_printf(seq, "<TODO>\n");
-
-      end:
-        return 0;
-}
-
-static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
-}
-
-static int
-acpi_video_bus_POST_options(struct acpi_video_bus *video,
-                            unsigned long long *options)
-{
-        int status;
-
-        status = acpi_evaluate_integer(video->device->handle, "_VPO",
-                                       NULL, options);
-        *options &= 3;
-
-        return status;
-}
-
-static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_bus *video = seq->private;
-        unsigned long long options;
-        int status;
-
-
-        if (!video)
-                goto end;
-
-        status = acpi_video_bus_POST_options(video, &options);
-        if (ACPI_SUCCESS(status)) {
-                if (!(options & 1)) {
-                        printk(KERN_WARNING PREFIX
-                               "The motherboard VGA device is not listed as a possible POST device.\n");
-                        printk(KERN_WARNING PREFIX
-                               "This indicates a BIOS bug. Please contact the manufacturer.\n");
-                }
-                printk(KERN_WARNING "%llx\n", options);
-                seq_printf(seq, "can POST: <integrated video>");
-                if (options & 2)
-                        seq_printf(seq, " <PCI video>");
-                if (options & 4)
-                        seq_printf(seq, " <AGP video>");
-                seq_putc(seq, '\n');
-        } else
-                seq_printf(seq, "<not supported>\n");
-      end:
-        return 0;
-}
-
-static int
-acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_bus_POST_info_seq_show,
-                           PDE(inode)->data);
-}
-
-static int
-acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
-{
-        int status;
-
-        status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
-
-        return status;
-}
-
-static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_bus *video = seq->private;
-        int status;
-        unsigned long long id;
-
-
-        if (!video)
-                goto end;
-
-        status = acpi_video_bus_get_POST(video, &id);
-        if (!ACPI_SUCCESS(status)) {
-                seq_printf(seq, "<not supported>\n");
-                goto end;
-        }
-        seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
-
-      end:
-        return 0;
-}
-
-static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
-{
-        struct acpi_video_bus *video = seq->private;
-
-
-        seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
-
-        return 0;
-}
-
-static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_bus_POST_seq_show,
-                           PDE(inode)->data);
-}
-
-static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
-{
-        return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
-}
-
-static int
-acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
-{
-        int status;
-        unsigned long long tmp;
-        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
-        struct acpi_object_list args = { 1, &arg0 };
-
-
-        arg0.integer.value = option;
-
-        status = acpi_evaluate_integer(video->device->handle, "_SPD",
-                                       &args, &tmp);
-        if (ACPI_SUCCESS(status))
-                status = tmp ? (-EINVAL) : (AE_OK);
-
-        return status;
-}
-
-static ssize_t
-acpi_video_bus_write_POST(struct file *file,
-                          const char __user * buffer,
-                          size_t count, loff_t * data)
-{
-        int status;
-        struct seq_file *m = file->private_data;
-        struct acpi_video_bus *video = m->private;
-        char str[12] = { 0 };
-        unsigned long long opt, options;
-
-
-        if (!video || count >= sizeof(str))
-                return -EINVAL;
-
-        status = acpi_video_bus_POST_options(video, &options);
-        if (!ACPI_SUCCESS(status))
-                return -EINVAL;
-
-        if (copy_from_user(str, buffer, count))
-                return -EFAULT;
-
-        str[count] = 0;
-        opt = strtoul(str, NULL, 0);
-        if (opt > 3)
-                return -EFAULT;
-
-        /* just in case an OEM 'forgot' the motherboard... */
-        options |= 1;
-
-        if (options & (1ul << opt)) {
-                status = acpi_video_bus_set_POST(video, opt);
-                if (!ACPI_SUCCESS(status))
-                        return -EFAULT;
-
-        }
-
-        return count;
-}
-
-static ssize_t
-acpi_video_bus_write_DOS(struct file *file,
-                         const char __user * buffer,
-                         size_t count, loff_t * data)
-{
-        int status;
-        struct seq_file *m = file->private_data;
-        struct acpi_video_bus *video = m->private;
-        char str[12] = { 0 };
-        unsigned long opt;
-
-
-        if (!video || count >= sizeof(str))
-                return -EINVAL;
-
-        if (copy_from_user(str, buffer, count))
-                return -EFAULT;
-
-        str[count] = 0;
-        opt = strtoul(str, NULL, 0);
-        if (opt > 7)
-                return -EFAULT;
-
-        status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
-
-        if (!ACPI_SUCCESS(status))
-                return -EFAULT;
-
-        return count;
-}
-
-static int acpi_video_bus_add_fs(struct acpi_device *device)
-{
-        struct acpi_video_bus *video = acpi_driver_data(device);
-        struct proc_dir_entry *device_dir;
-        struct proc_dir_entry *entry;
-
-        device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
-        if (!device_dir)
-                return -ENOMEM;
-
-        /* 'info' [R] */
-        entry = proc_create_data("info", S_IRUGO, device_dir,
-                                 &acpi_video_bus_info_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_dir;
-
-        /* 'ROM' [R] */
-        entry = proc_create_data("ROM", S_IRUGO, device_dir,
-                                 &acpi_video_bus_ROM_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_info;
-
-        /* 'POST_info' [R] */
-        entry = proc_create_data("POST_info", S_IRUGO, device_dir,
-                                 &acpi_video_bus_POST_info_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_rom;
-
-        /* 'POST' [R/W] */
-        entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
-                                 device_dir,
-                                 &acpi_video_bus_POST_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_post_info;
-
-        /* 'DOS' [R/W] */
-        entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
-                                 device_dir,
-                                 &acpi_video_bus_DOS_fops,
-                                 acpi_driver_data(device));
-        if (!entry)
-                goto err_remove_post;
-
-        video->dir = acpi_device_dir(device) = device_dir;
-        return 0;
-
- err_remove_post:
-        remove_proc_entry("POST", device_dir);
- err_remove_post_info:
-        remove_proc_entry("POST_info", device_dir);
- err_remove_rom:
-        remove_proc_entry("ROM", device_dir);
- err_remove_info:
-        remove_proc_entry("info", device_dir);
- err_remove_dir:
-        remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
-        return -ENOMEM;
-}
-
-static int acpi_video_bus_remove_fs(struct acpi_device *device)
-{
-        struct proc_dir_entry *device_dir = acpi_device_dir(device);
-
-        if (device_dir) {
-                remove_proc_entry("info", device_dir);
-                remove_proc_entry("ROM", device_dir);
-                remove_proc_entry("POST_info", device_dir);
-                remove_proc_entry("POST", device_dir);
-                remove_proc_entry("DOS", device_dir);
-                remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
-                acpi_device_dir(device) = NULL;
-        }
-
-        return 0;
-}
-#else
-static inline int acpi_video_device_add_fs(struct acpi_device *device)
-{
-        return 0;
-}
-static inline int acpi_video_device_remove_fs(struct acpi_device *device)
-{
-        return 0;
-}
-static inline int acpi_video_bus_add_fs(struct acpi_device *device)
-{
-        return 0;
-}
-static inline int acpi_video_bus_remove_fs(struct acpi_device *device)
-{
-        return 0;
-}
-#endif /* CONFIG_ACPI_PROCFS */
-
-/* --------------------------------------------------------------------------
                                  Driver Interface
    -------------------------------------------------------------------------- */
 
@@ -1877,8 +1063,6 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                 list_add_tail(&data->entry, &video->video_device_list);
                 mutex_unlock(&video->device_list_lock);
 
-                acpi_video_device_add_fs(device);
-
                 return 0;
         }
 
@@ -2109,6 +1293,9 @@ int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
                 if (!video_device)
                         continue;
 
+                if (!video_device->cap._DDC)
+                        continue;
+
                 if (type) {
                         switch (type) {
                         case ACPI_VIDEO_DISPLAY_CRT:
@@ -2167,7 +1354,7 @@ acpi_video_bus_get_devices(struct acpi_video_bus *video,
                 status = acpi_video_bus_get_one_device(dev, video);
                 if (ACPI_FAILURE(status)) {
                         printk(KERN_WARNING PREFIX
-                                        "Cant attach device\n");
+                                        "Can't attach device\n");
                         continue;
                 }
         }
@@ -2181,17 +1368,14 @@ static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
         if (!device || !device->video)
                 return -ENOENT;
 
-        acpi_video_device_remove_fs(device->dev);
-
         status = acpi_remove_notify_handler(device->dev->handle,
                                             ACPI_DEVICE_NOTIFY,
                                             acpi_video_device_notify);
         if (ACPI_FAILURE(status)) {
                 printk(KERN_WARNING PREFIX
-                       "Cant remove video notify handler\n");
+                       "Can't remove video notify handler\n");
         }
         if (device->backlight) {
-                sysfs_remove_link(&device->backlight->dev.kobj, "device");
                 backlight_device_unregister(device->backlight);
                 device->backlight = NULL;
         }
@@ -2203,7 +1387,6 @@ static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
                 thermal_cooling_device_unregister(device->cooling_dev);
                 device->cooling_dev = NULL;
         }
-        video_output_unregister(device->output_dev);
 
         return 0;
 }
@@ -2338,7 +1521,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_BRIGHTNESSDOWN;
                 break;
-        case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
+        case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */
                 if (brightness_switch_enabled)
                         acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
@@ -2466,10 +1649,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
         if (error)
                 goto err_free_video;
 
-        error = acpi_video_bus_add_fs(device);
-        if (error)
-                goto err_free_video;
-
         mutex_init(&video->device_list_lock);
         INIT_LIST_HEAD(&video->video_device_list);
 
@@ -2522,7 +1701,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
         acpi_video_bus_stop_devices(video);
         acpi_video_bus_put_devices(video);
         kfree(video->attached_array);
-        acpi_video_bus_remove_fs(device);
  err_free_video:
         kfree(video);
         device->driver_data = NULL;
@@ -2544,7 +1722,6 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
 
         acpi_video_bus_stop_devices(video);
         acpi_video_bus_put_devices(video);
-        acpi_video_bus_remove_fs(device);
 
         input_unregister_device(video->input);
         kfree(video->attached_array);
@@ -2584,17 +1761,9 @@ int acpi_video_register(void)
                 return 0;
         }
 
-#ifdef CONFIG_ACPI_PROCFS
-        acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
-        if (!acpi_video_dir)
-                return -ENODEV;
-#endif
-
         result = acpi_bus_register_driver(&acpi_video_bus);
-        if (result < 0) {
-                remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
+        if (result < 0)
                 return -ENODEV;
-        }
 
         /*
          * When the acpi_video_bus is loaded successfully, increase
@@ -2617,10 +1786,6 @@ void acpi_video_unregister(void)
         }
         acpi_bus_unregister_driver(&acpi_video_bus);
 
-#ifdef CONFIG_ACPI_PROCFS
-        remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
-#endif
-
         register_count = 0;
 
         return;