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* [PATCH] backlight last round of fixesBenjamin Herrenschmidt2006-09-011-8/+10
| | | | | | | | | | | Fix some more problems (inverted use of semaphores in some places). He also moved my checks into within the protected section which is better. Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Fix crashes in various fbdev's blank routinesBenjamin Herrenschmidt2006-08-301-1/+3
| | | | | | | | | | | | The backlight changes that went in had a bug where they could cause the kernel to access an unitialized pointer when blanking if there is no backlight control on a machine. The bug affects atyfb, aty128fb, nvidiafb and rivafb. radeonfb seems to be ok. This fixes it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powermac: Combined fixes for backlight codeMichael Hanselmann2006-07-101-4/+28
| | | | | | | | | | | | | | | | | | | | | | This patch fixes several problems: - pmac_backlight_key() is called under interrupt context, and therefore can't use mutexes or semaphores, so defer the backlight level for later, as it's not critical (original code by Aristeu S. Rozanski F. <aris@valeta.org>). - Add exports for functions that might be called from modules - Fix Kconfig depdencies on PMAC_BACKLIGHT. - Fix locking issues on calls from inside the driver (reported by Aristeu S. Rozanski F., too) - Fix wrong calculation of backlight values in some of the drivers - Replace pmac_backlight_key_up/down by inline functions [akpm@osdl.org: fix function prototypes] Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch> Acked-by: Aristeu S. Rozanski F. <aris@valeta.org> Acked-by: Rene Nussbaumer <linux-kernel@killerfox.forkbomb.ch> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Rewritten backlight infrastructure for portable Apple computersMichael Hanselmann2006-06-251-0/+175
This patch contains a total rewrite of the backlight infrastructure for portable Apple computers. Backward compatibility is retained. A sysfs interface allows userland to control the brightness with more steps than before. Userland is allowed to upload a brightness curve for different monitors, similar to Mac OS X. [akpm@osdl.org: add needed exports] Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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