linux-kernel - Re: [PATCH 3/4] viafb: do modesetting after updating variables

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Date:	Tue, 12 Jan 2010 21:58:01 +0100
From:	Erik-Jan <ej.post@...all.nl>
To:	Florian Tobias Schandinat <FlorianSchandinat@....de>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	JosephChan@....com.tw, ScottFang@...tech.com.cn
Subject: Re: [PATCH 3/4] viafb: do modesetting after updating variables



Florian Tobias Schandinat wrote:
> Hi Andrew,
> 
> Andrew Morton schrieb:
>> On Tue,  5 Jan 2010 22:59:58 +0000
>> Florian Tobias Schandinat <FlorianSchandinat@....de> wrote:
>>
>>> viafb: do modesetting after updating variables
>>>
>>> Reorder viafb_set_par to allow using the updated variables in
>>> viafb_setmode. This fixes a regression that prevented proper
>>> runtime mode changes.
>>>
>>> Signed-off-by: Erik-Jan Post <ej.lfs@...all.nl>
>>> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@....de>
>>> ---
>>>  drivers/video/via/viafbdev.c |    6 +++---
>>>  1 files changed, 3 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
>>> index e16df84..f7ff4ea 100644
>>> --- a/drivers/video/via/viafbdev.c
>>> +++ b/drivers/video/via/viafbdev.c
>>> @@ -174,15 +174,15 @@ static int viafb_set_par(struct fb_info *info)
>>>      }
>>>  
>>>      if (vmode_entry) {
>>> -        viafb_setmode(vmode_entry, info->var.bits_per_pixel,
>>> -            vmode_entry1, viafb_bpp1);
>>> -
>>>          viafb_update_fix(info);
>>>          viafb_bpp = info->var.bits_per_pixel;
>>>          if (info->var.accel_flags & FB_ACCELF_TEXT)
>>>              info->flags &= ~FBINFO_HWACCEL_DISABLED;
>>>          else
>>>              info->flags |= FBINFO_HWACCEL_DISABLED;
>>> +
>>> +        viafb_setmode(vmode_entry, info->var.bits_per_pixel,
>>> +            vmode_entry1, viafb_bpp1);
>>>      }
>>>  
>>>      return 0;
>>
>> Problem.
>>
>> Patches 2, 3 and 4 are appropriate to 2.6.33 - they fix regressions. 
>> But all four patches are dependent upon patches which we already have
>> queued for 2.6.34!
> 
> That are good news.
> 
>> I redid patches 2, 3 and 4 so they apply to current mainline.  This
>> particular patch (3/4) needed fixing - please check the result. 
>> --- 
>> a/drivers/video/via/viafbdev.c~viafb-do-modesetting-after-updating-variables 
>>
>> +++ a/drivers/video/via/viafbdev.c
>> @@ -177,16 +177,15 @@ static int viafb_set_par(struct fb_info      }
>>  
>>      if (vmode_index != VIA_RES_INVALID) {
>> -        viafb_setmode(vmode_index, info->var.xres, info->var.yres,
>> -            info->var.bits_per_pixel, vmode_index1,
>> -            viafb_second_xres, viafb_second_yres, viafb_bpp1);
>> -
>>          viafb_update_fix(info);
>>          viafb_bpp = info->var.bits_per_pixel;
>>          if (info->var.accel_flags & FB_ACCELF_TEXT)
>>              info->flags &= ~FBINFO_HWACCEL_DISABLED;
>>          else
>>              info->flags |= FBINFO_HWACCEL_DISABLED;
>> +        viafb_setmode(vmode_index, info->var.xres, info->var.yres,
>> +            info->var.bits_per_pixel, vmode_index1,
>> +            viafb_second_xres, viafb_second_yres, viafb_bpp1);
>>      }
>>  
>>      return 0;
>> _
> 
> This is correct.

Yep, it is correct.

Bye,
Erik-Jan

> 
>> This reordering broke viafb-split-global-index-up.patch, which I fixed 
>> up.
> 
> Thanks,
> 
> 
> Florian Tobias Schandinat
> -- 
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