[PATCH] drm/nouveau: fix regression in vblanking

[Marcin Slusarz]

On Tue, Mar 05, 2013 at 02:59:26PM +0100, Maarten Lankhorst wrote:
> nv50_vblank_enable/disable got switched from NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_0 (4) << head to 1 << head, which is wrong.
> 
> 4 << head is the correct value.
> 
> Fixes regression with vblanking since 1d7c71a3e2f77 "drm/nouveau/disp: port vblank handling to event interface"
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at canonical.com>
> ---
> diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
> index 5fa1326..02e369f 100644
> --- a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
> +++ b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
> @@ -544,13 +544,13 @@ nv50_disp_curs_ofuncs = {
>  static void
>  nv50_disp_base_vblank_enable(struct nouveau_event *event, int head)
>  {
> -	nv_mask(event->priv, 0x61002c, (1 << head), (1 << head));
> +	nv_mask(event->priv, 0x61002c, (4 << head), (4 << head));
>  }
>  
>  static void
>  nv50_disp_base_vblank_disable(struct nouveau_event *event, int head)
>  {
> -	nv_mask(event->priv, 0x61002c, (1 << head), (0 << head));
> +	nv_mask(event->priv, 0x61002c, (4 << head), 0);
>  }
>  
>  static int
> 

It fixes vblank on my NVA8, thanks.

Tested-by: Marcin Slusarz <marcin.slusarz at gmail.com>