ACPI: video: fix LCD monitor seen as CRT

http://bugzilla.kernel.org/show_bug.cgi?id=7349

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 43 insertions, 15 deletions

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 36b37d755dbc..6f760b51ca2d 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -57,6 +57,11 @@
 #define ACPI_VIDEO_HEAD_INVALID         (~0u - 1)
 #define ACPI_VIDEO_HEAD_END             (~0u)
 
+#define ACPI_VIDEO_DISPLAY_CRT  1
+#define ACPI_VIDEO_DISPLAY_TV   2
+#define ACPI_VIDEO_DISPLAY_DVI  3
+#define ACPI_VIDEO_DISPLAY_LCD  4
+
 #define _COMPONENT              ACPI_VIDEO_COMPONENT
 ACPI_MODULE_NAME("acpi_video")
 
@@ -133,9 +138,10 @@ struct acpi_video_device_flags {
         u8 crt:1;
         u8 lcd:1;
         u8 tvout:1;
+        u8 dvi:1;
         u8 bios:1;
         u8 unknown:1;
-        u8 reserved:3;
+        u8 reserved:2;
 };
 
 struct acpi_video_device_cap {
@@ -668,6 +674,8 @@ static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
                 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");
 
@@ -1242,6 +1250,16 @@ static int acpi_video_bus_remove_fs(struct acpi_device *device)
    -------------------------------------------------------------------------- */
 
 /* device interface */
+static struct acpi_video_device_attrib*
+acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
+{
+        int count;
+
+        for(count = 0; count < video->attached_count; count++)
+                if((video->attached_array[count].value.int_val & 0xffff) == device_id)
+                        return &(video->attached_array[count].value.attrib);
+        return NULL;
+}
 
 static int
 acpi_video_bus_get_one_device(struct acpi_device *device,
@@ -1250,7 +1268,7 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
         unsigned long device_id;
         int status;
         struct acpi_video_device *data;
-
+        struct acpi_video_device_attrib* attribute;
 
         if (!device || !video)
                 return -EINVAL;
@@ -1271,20 +1289,30 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
                 data->video = video;
                 data->dev = device;
 
-                switch (device_id & 0xffff) {
-                case 0x0100:
-                        data->flags.crt = 1;
-                        break;
-                case 0x0400:
-                        data->flags.lcd = 1;
-                        break;
-                case 0x0200:
-                        data->flags.tvout = 1;
-                        break;
-                default:
+                attribute = acpi_video_get_device_attr(video, device_id);
+
+                if((attribute != NULL) && attribute->device_id_scheme) {
+                        switch (attribute->display_type) {
+                        case ACPI_VIDEO_DISPLAY_CRT:
+                                data->flags.crt = 1;
+                                break;
+                        case ACPI_VIDEO_DISPLAY_TV:
+                                data->flags.tvout = 1;
+                                break;
+                        case ACPI_VIDEO_DISPLAY_DVI:
+                                data->flags.dvi = 1;
+                                break;
+                        case ACPI_VIDEO_DISPLAY_LCD:
+                                data->flags.lcd = 1;
+                                break;
+                        default:
+                                data->flags.unknown = 1;
+                                break;
+                        }
+                        if(attribute->bios_can_detect)
+                                data->flags.bios = 1;
+                } else
                         data->flags.unknown = 1;
-                        break;
-                }
 
                 acpi_video_device_bind(video, data);
                 acpi_video_device_find_cap(data);