[Intel-gfx] [PATCH] drm/i915: Ban Haswell from using RCS flips

[Jani Nikula]

On Sat, 27 Dec 2014, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Like Ivybridge, we have reports that we get random hangs when flipping
> with multiple pipes. Extend
>
> commit 2a92d5bca1999b69c78f3c3e97b5484985b094b9
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Tue Jul 8 10:40:29 2014 +0100
>
>     drm/i915: Disable RCS flips on Ivybridge
>
> to also apply to Haswell.
>
> Reported-by: Scott Tsai <scottt.tw at gmail.com>

>From the bug,

Tested-by: Scott Tsai <scottt.tw at gmail.com>

> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87759
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index d01db1b82869..ed2102e62271 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9703,7 +9703,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
>  		if (obj->tiling_mode != work->old_fb_obj->tiling_mode)
>  			/* vlv: DISPLAY_FLIP fails to change tiling */
>  			ring = NULL;
> -	} else if (IS_IVYBRIDGE(dev)) {
> +	} else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
>  		ring = &dev_priv->ring[BCS];
>  	} else if (INTEL_INFO(dev)->gen >= 7) {
>  		ring = i915_gem_request_get_ring(obj->last_read_req);
> -- 
> 2.1.4
>
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-- 
Jani Nikula, Intel Open Source Technology Center