On Friday 15 February 2008 23:17, Henrique de Moraes Holschuh wrote:
> 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@xxxxxxxxxx>
> ---
> 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
I would consider going one step further and delete this line
to make it default N (and update the description below).
Indeed, we recently deleted the kernel code from the ACPI video driver
that did video display switching -- at the request of the X community.
-Len
> + ---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,
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