[Intel-gfx] [PATCH] drm/i915: Use mmio flips harder

[Damien Lespiau]

On Wed, Nov 26, 2014 at 05:25:32PM +0100, Daniel Vetter wrote:
> Somehow (i.e. purely experimental evidence from users out there in the
> wild) using CS flips seems to be implicated in hw context switch
> hangs.
> 
> I have no idea why, but let's just try this out.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78960
> References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
> References: https://bugs.freedesktop.org/show_bug.cgi?id=80660
> References: https://bugs.freedesktop.org/show_bug.cgi?id=76314
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index a4106049e158..e5ece609e9fc 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9462,6 +9462,8 @@ static bool use_mmio_flip(struct intel_engine_cs *ring,
>  		return true;
>  	else if (i915.enable_execlists)
>  		return true;
> +	else if (INTEL_FINO(ring->dev)->gen >= 6)
> +		return true;

Missing:

#define INTEL_FINO(foo)	INTEL_INFO(foo)

-- 
Damien