[PATCH] drm/i915: Disable high-precision vblank timestamping

[Mario Kleiner]

> ------------------------------
>
> Message: 10
> Date: Sun, 23 Jan 2011 10:50:01 +0000
> From: Chris Wilson <chris at chris-wilson.co.uk>
> Subject: [PATCH] drm/i915: Disable high-precision vblank timestamping
> 	for UMS
> To: Chris Clayton <chris2553 at googlemail.com>
> Cc: linux-kernel at vger.kernel.org, dri-devel at lists.freedesktop.org
> Message-ID:
> 	<1295779801-8118-1-git-send-email-chris at chris-wilson.co.uk>
>
> We only have sufficient information for accurate (sub-frame)  
> timestamping
> when the modesetting is under our control.
>
> Reported-by: Chris Clayton <chris2553 at googlemail.com>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/i915_drv.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/ 
> i915_drv.c
> index 59eb19b..66796bb 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -752,6 +752,9 @@ static int __init i915_init(void)
>  		driver.driver_features &= ~DRIVER_MODESET;
>  #endif
>
> +	if (!(driver.driver_features & DRIVER_MODESET))
> +		driver.get_vblank_timestamp = NULL;
> +
>  	return drm_init(&driver);
>  }
>
> -- 
> 1.7.2.3
>
>


Oops! Have missed that. Thanks for fixing it.

Reviewed-by: Mario Kleiner <mario.kleiner at tuebingen.mpg.de>


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Mario Kleiner
Max Planck Institute for Biological Cybernetics
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