Subject: [PATCH] [acpi video] Get POST ID info along with post options

- Get _GPD in video_bus_post_options() and cache the value in
  ->v_post_id.

- NOTE that we may not want to always cache this value, so it
  may move to its own helper and called from proc/sysfs interfaces.

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/video/bus-device.c |   16 +++++++++++++---
 drivers/acpi/drivers/video/video.h      |    3 ++-
 2 files changed, 15 insertions(+), 4 deletions(-)

applies-to: f009a001edf40c30d9c8bc12c17bef37ad9bc0b7
6981a577be5eaf1d73c8baf0b61cb2d06ee3ce1c
diff --git a/drivers/acpi/drivers/video/bus-device.c b/drivers/acpi/drivers/video/bus-device.c
index 10f125e..232c138 100644
--- a/drivers/acpi/drivers/video/bus-device.c
+++ b/drivers/acpi/drivers/video/bus-device.c
@@ -129,12 +129,13 @@ void video_bus_check(struct acpi_video_b
 
 
 /**
- *	video_bus_post_options - Query the POST options of the bus
+ *	video_bus_post_options - Query the POST info on the bus
  *	@vb:	The ACPI video bus
  *
  *	If the device is capable of POSTing, then get the integer mask 
  *	stored at _VPO, which will tell us what devices it is capable of 
- *	executing the POST on.
+ *	executing the POST on, and get the integer at _GPD, which will
+ *	tell us which device has been POSTed.
  *
  *	The device should always be capable of posting the on-board video,
  *	but apparently the BIOS may incorrectly tell us that it cannot.
@@ -145,6 +146,10 @@ void video_bus_check(struct acpi_video_b
  *	later checked e.g.
  *		if (options & 4) ...
  *	Assuming that we want to keep that bit, the mask has changed to 0x7.
+ *
+ *
+ *	Q: Should we really cache _GPD, or should we call it every time
+ *	   we're asked for it?
  */
 
 int video_bus_post_options(struct acpi_video_bus * vb)
@@ -169,7 +174,12 @@ int video_bus_post_options(struct acpi_v
 				err("Please contact the manufacturer.");
 				err("options = %#01lx", o);
 			}
-		}
+		} else
+			return ret;
+
+		ret = get_int(vb->v_ad, "_GPD", &o);
+		if (!ret)
+			vb->v_post_id = o & 0x7;
 	}
 	return ret;
 }
diff --git a/drivers/acpi/drivers/video/video.h b/drivers/acpi/drivers/video/video.h
index ff2eac8..f4635a1 100644
--- a/drivers/acpi/drivers/video/video.h
+++ b/drivers/acpi/drivers/video/video.h
@@ -22,6 +22,7 @@ struct acpi_video_bus {
 	int			v_can_post;
 
 	int			v_post_options;
+	int			v_post_id;
 
 	struct acpi_dev		* v_ad;
 };
@@ -29,4 +30,4 @@ struct acpi_video_bus {
 extern int video_bus_test(struct acpi_dev * ad);
 
 extern void video_bus_check(struct acpi_video_bus * vb);
-int video_bus_post_options(struct acpi_video_bus * vb);
+extern int video_bus_post_options(struct acpi_video_bus * vb);
---
0.99.9.GIT