Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

[safe/jmp/linux-2.6] / drivers / acpi / video.c

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a29b0cc..bb5ed05 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -36,12 +36,12 @@
 #include <linux/backlight.h>
 #include <linux/thermal.h>
 #include <linux/video_output.h>
+#include <linux/sort.h>
 #include <asm/uaccess.h>
 
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_VIDEO_COMPONENT           0x08000000
 #define ACPI_VIDEO_CLASS               "video"
 #define ACPI_VIDEO_BUS_NAME            "Video Bus"
 #define ACPI_VIDEO_DEVICE_NAME         "Video Device"
@@ -482,6 +482,7 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
        int status = AE_OK;
        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
        struct acpi_object_list args = { 1, &arg0 };
+       int state;
 
 
        arg0.integer.value = level;
@@ -490,6 +491,10 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
                status = acpi_evaluate_object(device->dev->handle, "_BCM",
                                              &args, NULL);
        device->brightness->curr = level;
+       for (state = 2; state < device->brightness->count; state++)
+               if (level == device->brightness->levels[state])
+                       device->backlight->props.brightness = state - 2;
+
        return status;
 }
 
@@ -627,6 +632,16 @@ acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
 }
 
 /*
+ * Simple comparison function used to sort backlight levels.
+ */
+
+static int
+acpi_video_cmp_level(const void *a, const void *b)
+{
+       return *(int *)a - *(int *)b;
+}
+
+/*
  *  Arg:       
  *     device  : video output device (LCD, CRT, ..)
  *
@@ -677,6 +692,10 @@ acpi_video_init_brightness(struct acpi_video_device *device)
                count++;
        }
 
+       /* don't sort the first two brightness levels */
+       sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
+               acpi_video_cmp_level, NULL);
+
        if (count < 2)
                goto out_free_levels;
 
@@ -739,7 +758,8 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                device->cap._DSS = 1;
        }
 
-       max_level = acpi_video_init_brightness(device);
+       if (acpi_video_backlight_support())
+               max_level = acpi_video_init_brightness(device);
 
        if (device->cap._BCL && device->cap._BCM && max_level > 0) {
                int result;
@@ -785,18 +805,21 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                        printk(KERN_ERR PREFIX "Create sysfs link\n");
 
        }
-       if (device->cap._DCS && device->cap._DSS){
-               static int count = 0;
-               char *name;
-               name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
-               if (!name)
-                       return;
-               sprintf(name, "acpi_video%d", count++);
-               device->output_dev = video_output_register(name,
-                               NULL, device, &acpi_output_properties);
-               kfree(name);
+
+       if (acpi_video_display_switch_support()) {
+
+               if (device->cap._DCS && device->cap._DSS) {
+                       static int count;
+                       char *name;
+                       name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+                       if (!name)
+                               return;
+                       sprintf(name, "acpi_video%d", count++);
+                       device->output_dev = video_output_register(name,
+                                       NULL, device, &acpi_output_properties);
+                       kfree(name);
+               }
        }
-       return;
 }
 
 /*
@@ -842,11 +865,16 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 static int acpi_video_bus_check(struct acpi_video_bus *video)
 {
        acpi_status status = -ENOENT;
-
+       struct device *dev;
 
        if (!video)
                return -EINVAL;
 
+       dev = acpi_get_physical_pci_device(video->device->handle);
+       if (!dev)
+               return -ENODEV;
+       put_device(dev);
+
        /* Since there is no HID, CID and so on for VGA driver, we have
         * to check well known required nodes.
         */
@@ -992,7 +1020,7 @@ acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
        }
 
        seq_printf(seq, "levels: ");
-       for (i = 0; i < dev->brightness->count; i++)
+       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);
 
@@ -1031,7 +1059,7 @@ acpi_video_device_write_brightness(struct file *file,
                return -EFAULT;
 
        /* validate through the list of available levels */
-       for (i = 0; i < dev->brightness->count; i++)
+       for (i = 2; i < dev->brightness->count; i++)
                if (level == dev->brightness->levels[i]) {
                        if (ACPI_SUCCESS
                            (acpi_video_device_lcd_set_level(dev, level)))
@@ -1232,7 +1260,7 @@ static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
                        printk(KERN_WARNING PREFIX
                               "This indicates a BIOS bug. Please contact the manufacturer.\n");
                }
-               printk("%llx\n", options);
+               printk(KERN_WARNING "%llx\n", options);
                seq_printf(seq, "can POST: <integrated video>");
                if (options & 2)
                        seq_printf(seq, " <PCI video>");
@@ -1684,7 +1712,7 @@ acpi_video_get_next_level(struct acpi_video_device *device,
        max = max_below = 0;
        min = min_above = 255;
        /* Find closest level to level_current */
-       for (i = 0; i < device->brightness->count; i++) {
+       for (i = 2; i < device->brightness->count; i++) {
                l = device->brightness->levels[i];
                if (abs(l - level_current) < abs(delta)) {
                        delta = l - level_current;
@@ -1694,7 +1722,7 @@ acpi_video_get_next_level(struct acpi_video_device *device,
        }
        /* Ajust level_current to closest available level */
        level_current += delta;
-       for (i = 0; i < device->brightness->count; i++) {
+       for (i = 2; i < device->brightness->count; i++) {
                l = device->brightness->levels[i];
                if (l < min)
                        min = l;
@@ -1978,6 +2006,12 @@ static int acpi_video_bus_add(struct acpi_device *device)
                        device->pnp.bus_id[3] = '0' + instance;
                instance ++;
        }
+       /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
+       if (!strcmp(device->pnp.bus_id, "VGA")) {
+               if (instance)
+                       device->pnp.bus_id[3] = '0' + instance;
+               instance++;
+       }
 
        video->device = device;
        strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
@@ -2094,12 +2128,6 @@ static int __init acpi_video_init(void)
 {
        int result = 0;
 
-
-       /*
-          acpi_dbg_level = 0xFFFFFFFF;
-          acpi_dbg_layer = 0x08000000;
-        */
-
        acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
        if (!acpi_video_dir)
                return -ENODEV;