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ACPI: Populate DIDL before registering ACPI video device on Intel

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Intel graphics hardware that implements the ACPI IGD OpRegion spec
requires that the list of display devices be populated before any ACPI
video methods are called. Detect when this is the case and defer
registration until the opregion code calls it. Fixes crashes on HP
laptops.

http://bugzilla.kernel.org/show_bug.cgi?id=11259

Signed-off-by: Matthew Garrett <[email protected]>
Acked-by: Eric Anholt <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Matthew Garrett 2009-03-19 21:35:39 +00:00 • committed by Len Brown
commit 74a365b3f3
6 changed files with 119 additions and 6 deletions
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11
include/acpi/video.h Normal file
View file

@ -0,0 +1,11 @@
#ifndef __ACPI_VIDEO_H
#define __ACPI_VIDEO_H
#if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
extern int acpi_video_register(void);
#else
static inline int acpi_video_register(void) { return 0; }
#endif
#endif