Thanks, len and Bob. You are right. You make my explain more clear.
于2012年05月09日 星期三 04时23分37秒,Len Brown写到:
On 05/08/2012 04:52 AM, Lan Tianyu wrote:
Hi all:
Following is the usb port descriptor in the DSDT of Thinkpad T410.
The port is attached with bluetooth on the board.
Name (_UPC, Package (0x04) { 0xFF, 0xFF, 0x00, 0x00 })
_UPC 1st byte says "connectable"
_UPC 2nd byte says "proprietary connector"
Name (_PLD, Buffer (0x10)
{ /* 0000 */ 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* 0008 */ 0x30, 0x1C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
}) }
_PLD buffer show the device internal port. Bit 64 – User Visible:
Set if the device connection point can be seen by the user without
disassembly.
According to the decoding from Bob Moore,
bit 64 is not set, and thus this I/F is NOT user visible.
Are we decoding this correctly?
81 6:0 = 1 (revision)
7 = 1 (ignore color)
00 15:8 (color red = 0)
00 23:16 (color green = 0)
00 31:24 (color blue = 0)
00 47:32 (width = 0)
00
00 63:48 (Height = 0)
00
30 64 (user visible = 0)
65 (dock = 0)
66 (lid = 0)
67:69 (Panel = b110 = 6 = unknown)
71:70 (vertical = 0 = upper)
1c 73:72 (horizontal = b00 = 0 = left)
77:74 (shape = b0111 = 7 = unknown)
00
00
00
00
00
00
-Len
于2012年05月08日 星期二 10时58分17秒,Matthew Garrett写到:
On Mon, May 07, 2012 at 09:57:44AM -0700, Greg KH wrote:
On Mon, May 07, 2012 at 09:38:15AM +0800, Lan Tianyu wrote:
This depends on the bios. From my opinion, the bluetooth is device
on the
motherboard so it belongs to hard-wired type.
That's nice, but it's not what is happening in lots of different laptops
out there today.
Oliver is right, how does this handle bluetooth USB controllers that are
turned on/off from magic function-key presses?
I /believe/ that such devices will be indicated as fixed rather than
removable. The variable indicates the physical state rather than the
logical one - fixed doesn't mean that a device will never go away, it
means that a user can't physically unplug it.
--
Best Regards
Tianyu Lan
linux kernel enabling team
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