Hi, All
the following is the patch set that can weaken the dependency between ACPI video and i915
driver.
Patch 1/2: Check whether the acpi video is deferrable only when KMS is enabled
When the KMS is enabled in kernel configuration, OS will check whether the acpi video
driver is deferrable. Otherwise it will continue the current flowchart.
Patch 2/2: weaken the tight dependency between the ACPI video driver and i915 driver
Now there exists the tight dependency between the ACPI video driver and i915 driver.
If the I915 driver is compiled as built-in module and the acpi video is compiled as module,
it will fail in the kernel compilation.
At the same time the acpi video driver must be loaded in order to load
the I915 driver. It is very hack.
This patch is to weaken the dependency between the ACPI video driver and
i915 driver. But it still can do what we expected.
a. the i915/acpi_video_register is defined in the video_detect.When the video is selected,
it will be complied as built-in functions. If the video is not selected, it is defined as
inline function.
b. i915_video_register is called by i915 driver. And i915 video flag is set.
c. acpi_video_register/unregister is called by acpi video driver. The acpi video bus driver
is hooked and the ACPI video flag is set.
d. When the both flag bits are set, the acpi video bus driver will be registered.
Welcome the comments.
Best regards
Yakui
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