[PATCH 03/14] drm/atmel-hlcdc: Convert to Linux IRQ interfaces

[Thomas Zimmermann]

Hi

Am 28.07.21 um 20:11 schrieb Sam Ravnborg:
> Hi Dan,
> 
> thanks for the quick feedback!
> 
> On Wed, Jul 28, 2021 at 05:50:34PM +0000, Dan.Sneddon at microchip.com wrote:
>> On 7/28/21 8:44 AM, Sam Ravnborg wrote:
>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>
>>> Hi Dan,
>>>
>>> On Wed, Jul 28, 2021 at 03:11:08PM +0000, Dan.Sneddon at microchip.com wrote:
>>>> On 7/28/21 7:00 AM, Sam Ravnborg wrote:
>>>>> [You don't often get email from sam at ravnborg.org. Learn why this is important at http://aka.ms/LearnAboutSenderIdentification.]
>>>>>
>>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>>>
>>>>> Hi Dan,
>>>>>
>>>>> I hope you can fine to test this patch from Thomas.
>>>>> If this works then we can forget about my attempt to do the same.
>>>>
>>>> I'll test this as soon as I can and let you know.
>>>
>>> Thanks, crossing my fingers... (which explains the funny spelling from
>>> time to time)
>>>
>>>           Sam
>>> So I ran the test on an A5D27 XULT board with a PDA5 display.  Our
>> graphics demos that come with our linux4sam releases seem to run just
>> fine.  modetest -v seems to run just fine.  However, vbltest returns
>> "drmWaitVBlank (relative) failed ret: -1".  I don't understand why
>> modetest -v is working and vbltest isn't, but that's what I'm seeing.

Thanks for testing.

> 
> Strange indeed.
> 
> 
> Just to be sure...
> Can you confirm that vbltest is working OK *before* this patch?

Yes, can you please verify that it regressed. If so, this would mean 
that the driver misses vblank interrupts with the patch applied.

Best regards
Thomas

> 
> 	Sam
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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