linux-kernel - Re: 3.0.0-rc2 fails to boot on Atom appliance (bisected, drm/i915)

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Message-ID: <4DEDA25C.5010405@candelatech.com>
Date:	Mon, 06 Jun 2011 21:00:28 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	Keith Packard <keithp@...thp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.0.0-rc2 fails to boot on Atom appliance (bisected, drm/i915)

On 06/06/2011 05:24 PM, Jesse Barnes wrote:
> On Mon, 06 Jun 2011 16:59:02 -0700
> Ben Greear<greearb@...delatech.com>  wrote:
>
>> On 06/06/2011 04:41 PM, Keith Packard wrote:
>>> On Mon, 06 Jun 2011 16:26:25 -0700, Ben Greear<greearb@...delatech.com>   wrote:
>>>> On 06/06/2011 01:09 PM, Ben Greear wrote:
>>>>> Anyone seen something like this?  For what it's worth, it seems
>>>>> that -rc1 had the same problem. I'll start bisecting soon if
>>>>> the problem isn't already resolved somehow...
>>>>
>>>> I bisected this problem down to this commit:
>>>
>>> This should be fixed by this patch:
>>>
>>> -------------------- drivers/gpu/drm/i915/intel_display.c ---------------------
>>> index f553ddf..bb1b59b 100644
>>> @@ -7675,6 +7675,7 @@ static void intel_init_display(struct drm_device *dev)
>>>    			dev_priv->display.update_wm = NULL;
>>>    		} else
>>>    			dev_priv->display.update_wm = pineview_update_wm;
>>> +		dev_priv->display.init_clock_gating = gen3_init_clock_gating;
>>>    	} else if (IS_G4X(dev)) {
>>>    		dev_priv->display.update_wm = g4x_update_wm;
>>>    		dev_priv->display.init_clock_gating = g4x_init_clock_gating;
>>>
>>> This hasn't been merged yet, but should be soon.
>>
>> I tried adding that, but the problem stays the same.
>>
>> Any other patches I should try?
>
> Are you sure you booted the right kernel and that it built&  installed
> correctly?

I double checked, but I tried to cheat a bit and just applied that patch on
top of -rc2 instead of on top of the patch that breaks things according to
bisect.  Maybe there is more than one problem.  I'll try tweaking that single
patch tomorrow.

And, I built and booted twice to make sure I didn't screw up..but it had been
a long day of bisecting, so maybe I still messed up some how.

>
> You could add an:
>    if (dev_priv->display.init_clock_gating)
> above the call to display.init_clock_gating in intel_init_clock_gating
> to be sure it's the same problem...

Ok, can try that too.

Thanks,
Ben


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com
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