On 12/05/2017 09:10 PM, Liwei Song wrote:
On 12/06/2017 06:26 AM, Bruce Ashfield wrote:
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) ?
Yes, it is a timing problem, how about rephrase it as following:
This can aviod a timing problem between the driver starting
s/aviod/avoid/
and it triggering a firmware load, after compile it as module
i915 driver will start after the rootfs is ready, then the
firmware store in /lib/firmware/ can be load successful by
i915 driver.
But yes, that log is good for a v2.
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 ?
I suppose no during my test on board.
So the device is likely triggering the module auto-load
via the helper ? It would be good to fully understand this part,
since it also means that any initramfs needs the module.
What type of boot are you doing for the test ? Is there an
initramfs/initrd involved ?
Bruce
Thanks,
Liwei.
Since there is that possibility, restating the problem you are
trying to fix would be good.
Bruce
Signed-off-by: Liwei Song <[email protected]>
---
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
--
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