Re: [PATCH 10/10] Revert "drm: crc: Wait for a frame before returning from open()"

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Op 22-06-18 om 12:41 schreef Mahesh Kumar:
> This reverts commit e8fa5671183c80342d520ad81d14fa79a9d4a680.
>
> Don't wait for first CRC during crtc_crc_open. It avoids one frame wait
> during open. If application want to wait after read call, it can use
> poll/read blocking read() call.
>
> Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
> ---
>  drivers/gpu/drm/drm_debugfs_crc.c | 16 ----------------
>  1 file changed, 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c
> index 834bc7ee5550..69ec2728727e 100644
> --- a/drivers/gpu/drm/drm_debugfs_crc.c
> +++ b/drivers/gpu/drm/drm_debugfs_crc.c
> @@ -211,24 +211,8 @@ static int crtc_crc_open(struct inode *inode, struct file *filep)
>  	if (ret)
>  		goto err;
>  
> -	spin_lock_irq(&crc->lock);
> -	/*
> -	 * Only return once we got a first frame, so userspace doesn't have to
> -	 * guess when this particular piece of HW will be ready to start
> -	 * generating CRCs.
> -	 */
> -	ret = wait_event_interruptible_lock_irq(crc->wq,
> -						crtc_crc_data_count(crc),
> -						crc->lock);
> -	spin_unlock_irq(&crc->lock);
> -
> -	if (ret)
> -		goto err_disable;
> -
>  	return 0;
>  
> -err_disable:
> -	crtc->funcs->set_crc_source(crtc, NULL);
>  err:
>  	spin_lock_irq(&crc->lock);
>  	crtc_crc_cleanup(crc);

Adding Tomeu Vizoso to the cc.

Can you resend the series, and add dri-devel@lists.freedesktop.org and the driver maintainers to the cc? You'll need to get acks from the maintainers to merge this through drm-misc. :)

~Maarten

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