kernel.git/drivers/video/backlight/backlight.c, branch linux-2.6.22.y

backlight: Separate backlight properties from backlight ops pointers

2007-02-20T09:26:53Z

Per device data such as brightness belongs to the indivdual device and should therefore be separate from the the backlight operation function pointers. This patch splits the two types of data and allows simplifcation of some code. Signed-off-by: Richard Purdie

backlight: Clean up pmac_backlight handling

2007-02-20T09:26:40Z

Move the setting/unsetting of pmac_backlight into the backlight core instead of doing it in each driver. Signed-off-by: Richard Purdie

backlight/fbcon: Add FB_EVENT_CONBLANK

2007-02-20T08:38:45Z

The backlight class wants notification whenever the console is blanked but doesn't get this when hardware blanking fails and software blanking is used. Changing FB_EVENT_BLANK to report both would be a behaviour change which could confuse the console layer so add a new event for software blanking and have the backlight class listen for both. Signed-off-by: Richard Purdie

backlight: Convert semaphore -> mutex

2007-02-20T08:38:45Z

Convert internal semaphore to a mutex Signed-off-by: Richard Purdie

backlight: Fix external uses of backlight internal semaphore

2007-02-20T08:38:45Z

backlight_device->sem has a very specific use as documented in the header file. The external users of this are using it for a different reason, to serialise access to the update_status() method. backlight users were supposed to implement their own internal serialisation of update_status() if needed but everyone is doing things differently and incorrectly. Therefore add a global mutex to take care of serialisation for everyone, once and for all. Locking for get_brightness remains optional since most users don't need it. Also update the lcd class in a similar way. Signed-off-by: Richard Purdie

backlight: Remove excessive (un)likelys

2007-02-20T08:38:44Z

Remove excessive numbers of (un)likely()s in the backlight core. There are no hot paths in this code so rely on compiler to do the right thing. Signed-off-by: Dmitry Torokhov Signed-off-by: Richard Purdie

backlight: Fix error handling

2007-02-20T08:35:09Z

Fix error handling when registering new device Signed-off-by: Dmitry Torokhov Signed-off-by: Richard Purdie

Pull platform-drivers into test branch

2006-12-20T07:52:17Z

ACPI: video: Add dev argument for backlight_device_register

2006-12-20T06:42:19Z

This patch set adds generic abstract layer support for acpi video driver to have generic user interface to control backlight and output switch control by leveraging the existing backlight sysfs class driver, and by adding a new video output sysfs class driver. This patch: Add dev argument for backlight_device_register to link the class device to real device object. The platform specific driver should find a way to get the real device object for their video device. [akpm@osdl.org: build fix] [akpm@osdl.org: fix msi-laptop.c] Signed-off-by: Luming Yu Cc: "Antonino A. Daplas" Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Len Brown

[PATCH] backlight: do not power off backlight when unregistering

2006-12-08T16:29:07Z

ACPI drivers like ibm-acpi are moving to the backlight sysfs infrastructure. During ibm-acpi testing, I have noticed that backlight_device_unregister() sets the display brightness and power to zero. This causes the display to be dimmed on ibm-acpi module removal. It will affect all other ACPI drivers that are being converted to use the backlight class, as well. It also affects a number of framebuffer devices that are used on desktops and laptops which might also not want such behaviour. Since working around this behaviour requires undesireable hacks, Richard Purdie decided that we would be better off reverting the changes in the sysfs class, and adding the code to dim and power off the backlight device to the drivers that want it. This patch is my attempt to do so. Patch against latest linux-2.6.git. Changes untested, as I lack the required hardware. Still, they are trivial enough that, apart from typos, there is little chance of getting them wrong. Signed-off-by: Henrique de Moraes Holschuh Acked-by: Richard Purdie Acked-by: Pavel Machek Acked-by: James Simmons Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds