linux-kernel - Re: [git pull] drm for rc1

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Date:	Fri, 14 Jan 2011 20:22:45 +0200
From:	Anca Emanuel <anca.emanuel@...il.com>
To:	James Simmons <jsimmons@...radead.org>
Cc:	Christian Borntraeger <borntraeger@...ibm.com>,
	Dave Airlie <airlied@...ux.ie>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [git pull] drm for rc1

On Fri, Jan 14, 2011 at 6:38 PM, James Simmons <jsimmons@...radead.org> wrote:
>
> On Thu, 13 Jan 2011, Anca Emanuel wrote:
>
>> On Thu, Jan 13, 2011 at 7:55 PM, James Simmons <jsimmons@...radead.org> wrote:
>> >
>> >> > > With your patch, I can boot the system. But nouveau is not loaded.
>> >> > > dmesg attached.
>> >> > >
>> >> >
>> >> > Forget to mention: the revert makes first steps of boot look the same
>> >> > (change the resolution of the text)
>> >> > but with your patch, I see a big ugly ununtu logo, (I think that is
>> >> > because nouveau is not loaded)
>> >
>> > Okay, can you do one more experiment for me. Since you already reverted
>> > the patch to get it booting I like to ask you to add
>> >
>> > drm_fb_helper_fill_fix(info, fb_helper->fb);
>> >
>> > back into the drm_fb_helper_set_par function in drm_fb_helper.c. You have
>> > something like this:
>> >
>> >        mutex_lock(&dev->mode_config.mutex);
>> >        for (i = 0; i < fb_helper->crtc_count; i++) {
>> >                crtc = fb_helper->crtc_info[i].mode_set.crtc;
>> >                ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
>> >                if (ret) {
>> >                        mutex_unlock(&dev->mode_config.mutex);
>> >                        return ret;
>> >                }
>> >                drm_fb_helper_fill_fix(info, fb_helper->fb);
>> >        }
>> >        mutex_unlock(&dev->mode_config.mutex);
>> >
>> > Tell me if your system is still usable after that. Thanks for testing for
>> > me.
>> >
>>
>> after
>>
>> git revert dfe63bb0ad9810db13aab0058caba97866e0a681
>>
>> and
>>
>>
>> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
>> index 5c4f9b9..2aad663 100644
>> --- a/drivers/gpu/drm/drm_fb_helper.c
>> +++ b/drivers/gpu/drm/drm_fb_helper.c
>> @@ -816,6 +816,7 @@ int drm_fb_helper_set_par(struct fb_info *info)
>>                         mutex_unlock(&dev->mode_config.mutex);
>>                         return ret;
>>                 }
>> +               drm_fb_helper_fill_fix(info, fb_helper->fb->pitch, fb_helper->fb
>>         }
>>         mutex_unlock(&dev->mode_config.mutex);
>>
>> I get an working system. ( the boot screen is not ok )
>> Tested suspend/resume. Dmesg attached.
>
> Just as I thought. Even this breaks the nouveau driver.
>
> Could you now add also in the drm_fb_helper_fill_fix function
>
> DRM_INFO("pitch %d, depth %d\n", fb_helper->fb->pitch,
>          fb_helper->fb->depth);
>
> I have a feeling the values are not right. Thanks.
>

Please make an patch to test.
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