Hi Sam,
On 7/28/21 12:08 PM, Sam Ravnborg wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Hi Dan,
>
>>>>
>>>> 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.
>>
>> Yes, unfortunately the vbltest works before this patch, but fails after
>> this patch is applied.
>
> I think I got it - we need to set irq_enabled to true.
> The documentation says so:
> "
> * @irq_enabled:
> *
> * Indicates that interrupt handling is enabled, specifically vblank
> * handling. Drivers which don't use drm_irq_install() need to set this
> * to true manually.
> "
>
> Can you try to add the following line:
>
>
> +static int atmel_hlcdc_dc_irq_install(struct drm_device *dev, unsigned int irq)
> +{
> + int ret;
> +
> + if (irq == IRQ_NOTCONNECTED)
> + return -ENOTCONN;
> +
>
> dev->irq_enabled = true; <= THIS LINE
>
>
> + atmel_hlcdc_dc_irq_disable(dev);
> +
> + ret = request_irq(irq, atmel_hlcdc_dc_irq_handler, 0, dev->driver->name, dev);
> + if (ret)
> + return ret;
>
> I hope this fixes it.
It does! With the irq_enabled line added everything is looking good.
Best Regards,
Dan
>
> Sam
>
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