[Intel-gfx] [PATCH 2/2] drm/i915: Also call frontbuffer flip when disabling planes.

[Rodrigo Vivi]

I had forgotten I had this patch and lost sometime yesterday debugging and
end up on same fix again :/

Daniel, do you need a reviewer on this? could you please take a quickly
look?

thanks in advance,
Rodrigo.

On Fri, Jul 24, 2015 at 4:41 PM Rodrigo Vivi <rodrigo.vivi at intel.com> wrote:

> We also need to call the frontbuffer flip to trigger proper
> invalidations when disabling planes. Otherwise we will miss
> screen updates when disabling sprites or cursor.
>
> It was caught with kms_psr_sink_crc sprite_plane_onoff
> and cursor_plane_onoff subtests.
>
> This is probably a regression since I can also get this
> with the manual test case, but with so many changes on atomic
> modeset I couldn't track exactly when this was introduced.
>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
>  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 af0bcfe..bb124cc 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11716,7 +11716,7 @@ int intel_plane_atomic_calc_changes(struct
> drm_crtc_state *crtc_state,
>                 intel_crtc->atomic.update_wm_pre = true;
>         }
>
> -       if (visible)
> +       if (visible || was_visible)
>                 intel_crtc->atomic.fb_bits |=
>                         to_intel_plane(plane)->frontbuffer_bit;
>
> --
> 1.9.3
>
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