於 五，2012-07-27 於 09:21 -0400，Alex Deucher 提到：
On Fri, Jul 27, 2012 at 12:46 AM, joeyli jlee@suse.com wrote:
- flags
- bits 1:0:
- 0 - Notify(VGA, 0x81) is not used for notification
- 1 - Notify(VGA, 0x81) is used for notification
Per the above flags, when we detect bit set to 1, means 0x81 used for radeon-acpi to be a general notification event. My question is: what's the event number for ACPI_VIDEO_NOTIFY_PROBE on this AMD/ATI machine when 0x81 not available for acpi/video?
+/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
- ARG1: none
- OUTPUT:
- WORD - structure size in bytes (includes size field)
- DWORD - valid flags mask
- DWORD - flags
- OR
- WORD - structure size in bytes (includes size field)
- DWORD - valid flags mask
- DWORD - flags
- BYTE - notify command code
- flags
- bits 1:0:
- 0 - Notify(VGA, 0x81) is not used for notification
- 1 - Notify(VGA, 0x81) is used for notification
- 2 - Notify(VGA, n) is used for notification where
- n (0xd0-0xd9) is specified in notify command code.
- bit 2:
- 1 - lid changes not reported though int10
- */
if bits 1:0 == 0, there is no notify event for radeon. When bits 1:0 == 1, it uses 0x81; when bits 1:0 == 2 it uses the event number specified in the following byte (notify command code) which would be something in the 0xd0-0xd9 range.
Alex
Did you mean every time we received 0x81 event in kernel module, we need access GET_SYSTEM_PARAMETERS to get the flags for distinguish between ACPI_VIDEO_NOTIFY_PROBE?
Or just need access ONE time when system boot?
I have a machine the GET_SYSTEM_PARAMETERS looks like this:
Method (AF01, 0, NotSerialized) /* ATIF_FUNCTION_GET_SYSTEM_PARAMETERS 0x1 */ { CreateWordField (ATIB, Zero, SSZE) CreateDWordField (ATIB, 0x02, VMSK) CreateDWordField (ATIB, 0x06, FLGS) /* flags bits 1:0 */ Store (0x0A, SSZE) /* structure SIZE fixed */ Store (0x03, VMSK) /* valid flags mask fixed to 0x03 */ Store (One, FLGS) /* FLAGS always set to 1 */ Return (ATIB) }
Looks like just need access ONE time when system boot because those return value of AF01 fixed in DSDT.
On this machine doesn't support probe event, I didn't see any event issued when I plug D-Sub. Does that means those kind of ATI/AMD machines do NOT support probe notify?
If YES, then we can just direct disable acpi/video driver by radeon-acpi when we detected FLAGS is 1.
Thanks a lot! Joey Lee