[PATCH 14/26] ACPI: thinkpad-acpi: make the video output feature optional

Len Brown
2008-02-21T09:29:16Z

From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>

The video output port control feature is not very useful on many ThinkPads
(especially when a X server is running), and lately userspace is getting
better and better at it, so it makes sense to allow users to stripe out the
thinkpad-acpi video feature from their kernels and save at least 2KB.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/misc/Kconfig | 17 +++++++++++++++++
drivers/misc/thinkpad_acpi.c | 20 +++++++++++++-------
2 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 1abc95c..982e27b 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -258,6 +258,23 @@ config THINKPAD_ACPI_BAY

If you are not sure, say Y here.

+config THINKPAD_ACPI_VIDEO
+ bool "Video output control support"
+ depends on THINKPAD_ACPI
+ default y
+ ---help---
+ Allows the thinkpad_acpi driver to provide an interface to control
+ the various video output ports.
+
+ This feature often won't work well, depending on ThinkPad model,
+ display state, video output devices in use, whether there is a X
+ server running, phase of the moon, and the current mood of
+ Schroedinger's cat. If you can use X.org's RandR to control
+ your ThinkPad's video output ports instead of this feature,
+ don't think twice: do it and say N here to save some memory.
+
+ If you are not sure, say Y here.
+
config THINKPAD_ACPI_HOTKEY_POLL
bool "Suport NVRAM polling for hot keys"
depends on THINKPAD_ACPI
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 02f9465..4ea3866 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -301,6 +301,13 @@ TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
"HKEY", /* all others */
); /* 570 */

+TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
+ "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
+ "\\_SB.PCI0.VID0", /* 770e */
+ "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
+ "\\_SB.PCI0.AGP.VID", /* all others */
+ ); /* R30, R31 */
+

/*************************************************************************
* ACPI helpers
@@ -2680,6 +2687,8 @@ static struct ibm_struct wan_driver_data = {
* Video subdriver
*/

+#ifdef CONFIG_THINKPAD_ACPI_VIDEO
+
enum video_access_mode {
TPACPI_VIDEO_NONE = 0,
TPACPI_VIDEO_570, /* 570 */
@@ -2707,13 +2716,6 @@ static int video_orig_autosw;
static int video_autosw_get(void);
static int video_autosw_set(int enable);

-TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */
- "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */
- "\\_SB.PCI0.VID0", /* 770e */
- "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */
- "\\_SB.PCI0.AGP.VID", /* all others */
- ); /* R30, R31 */
-
TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */

static int __init video_init(struct ibm_init_struct *iibm)
@@ -3023,6 +3025,8 @@ static struct ibm_struct video_driver_data = {
.exit = video_exit,
};

+#endif /* CONFIG_THINKPAD_ACPI_VIDEO */
+
/*************************************************************************
* Light (thinklight) subdriver
*/
@@ -5807,10 +5811,12 @@ static struct ibm_init_struct ibms_init[] __initdata = {
.init = wan_init,
.data = &wan_driver_data,
},
+#ifdef CONFIG_THINKPAD_ACPI_VIDEO
{
.init = video_init,
.data = &video_driver_data,
},
+#endif
{
.init = light_init,
.data = &light_driver_data,
--
1.5.4.2