[linux-yocto] [kernel-cache][yocto-4.12][PATCH] features/i915/i915.cfg: compile i915 as a module

[Bruce Ashfield]

On 12/04/2017 08:16 PM, Liwei Song wrote:
> Set i915 as a moudle to trigger the firmware load

typo: module

> at the same time the module is loaded.
> 
> This can aviod i915 driver load rootfs's firmware before
> rootfs was mounted error.

I'm not following this problem description, can you rephrase ?
Is it a timing problem between the driving starting (as the
built in) and it triggering a firmware load (that fails due
to the rootfs not being ready) ?

presumably the i915 was built in for a reason, i.e. so it
is available in early boot without the need to load a module.
And this change would break that functionality. Also, are
there any other build settings that need to arrange for the
module autoload ?

Since there is that possibility, restating the problem you are
trying to fix would be good.

Bruce

> 
> Signed-off-by: Liwei Song <liwei.song at windriver.com>
> ---
>   features/i915/i915.cfg | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/features/i915/i915.cfg b/features/i915/i915.cfg
> index 6dcc60f2dfc7..60cb963e014b 100644
> --- a/features/i915/i915.cfg
> +++ b/features/i915/i915.cfg
> @@ -8,6 +8,6 @@ CONFIG_AGP=y
>   CONFIG_AGP_INTEL=y
>   CONFIG_DRM=y
>   CONFIG_DRM_KMS_HELPER=y
> -CONFIG_DRM_I915=y
> +CONFIG_DRM_I915=m
>   CONFIG_DRM_KMS_FB_HELPER=y
>   CONFIG_DRM_I915_ALPHA_SUPPORT=y
>