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Diffstat (limited to 'drivers/acpi/video.c')
-rw-r--r--drivers/acpi/video.c78
1 files changed, 53 insertions, 25 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a29b0ccac65..bb5ed059114 100644
--- 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;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-18 06:13:00 +0000