On Mon, 2011-01-24 at 01:22 +0800, Michael Karcher wrote: > This patch reverts one hunk of 677bd810eedce61edf15452491781ff046b92edc > "ACPI video: remove output switching control", namely the removal of > probing for _DOS/_DOD when searching for video devices. > > This is needed on some Fujitsu Laptops (at least S7110, P8010) for the > ACPI backlight interface to work, as an these machines, neither ROM nor > posting methods are available, and after removal of output switching, > none of the caps triggers, which prevents the backlight search from > being entered. > > Tested on a Fujitsu Lifebook S7110 and Fujitsu Lifebook P8010. > This probably fixes https://bugzilla.kernel.org/show_bug.cgi?id=27312 > for the people who have no entry in /sys/class/backlight. > > This is the complete list of public (starting with "_") methods implemented > on the S7110, BIOS rev 1.34: > > \_SB_.PCI0.GFX0._ADR > \_SB_.PCI0.GFX0._DOS > \_SB_.PCI0.GFX0._DOD > \_SB_.PCI0.GFX0.CRT._ADR > \_SB_.PCI0.GFX0.CRT._DCS > \_SB_.PCI0.GFX0.CRT._DGS > \_SB_.PCI0.GFX0.CRT._DSS > \_SB_.PCI0.GFX0.LCD._ADR > \_SB_.PCI0.GFX0.LCD._BCL > \_SB_.PCI0.GFX0.LCD._BCM > \_SB_.PCI0.GFX0.LCD._BQC > \_SB_.PCI0.GFX0.LCD._DCS > \_SB_.PCI0.GFX0.LCD._DGS > \_SB_.PCI0.GFX0.LCD._DSS > \_SB_.PCI0.GFX0.LCD._PS0 > \_SB_.PCI0.GFX0.LCD._PS3 > \_SB_.PCI0.GFX0.TV._ADR > \_SB_.PCI0.GFX0.TV._DCS > \_SB_.PCI0.GFX0.TV._DGS > \_SB_.PCI0.GFX0.TV._DSS > \_SB_.PCI0.GFX0.DVI._ADR > \_SB_.PCI0.GFX0.DVI._DCS > \_SB_.PCI0.GFX0.DVI._DGS > \_SB_.PCI0.GFX0.DVI._DSS > > Signed-off-by: Michael Karcher <kernel@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> Acked-by: Zhang Rui <rui.zhang@xxxxxxxxx> > --- > drivers/acpi/video_detect.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c > index 42d3d72..5af3479 100644 > --- a/drivers/acpi/video_detect.c > +++ b/drivers/acpi/video_detect.c > @@ -82,6 +82,11 @@ long acpi_is_video_device(struct acpi_device *device) > if (!device) > return 0; > > + /* Is this device able to support video switching ? */ > + if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) || > + ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy))) > + video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; > + > /* Is this device able to retrieve a video ROM ? */ > if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy))) > video_caps |= ACPI_VIDEO_ROM_AVAILABLE; -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
