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Commit f1ecaf8f authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Matt Roper
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drm/i915: Start WM computation from scratch on ILK-BDW 



ilk_compute_pipe_wm() assumes as zeroed pipe_wm structure when it
starts. We used to pass such a zeroed struct in, but this got broken
when the pipe_wm structure got embedded in the crtc state.

To fix it without too much fuzz, we need to resort to a memset().

Fixes: 4e0963c7 ("drm/i915: Calculate pipe watermarks into CRTC state (v3)")
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
parent 87ad3212

drivers/gpu/drm/i915/intel_pm.c

+1 −0
Original line number Diff line number Diff line
@@ -2317,6 +2317,7 @@ static int ilk_compute_pipe_wm(struct intel_crtc *intel_crtc, 
		return PTR_ERR(cstate);



	pipe_wm = &cstate->wm.optimal.ilk;

	memset(pipe_wm, 0, sizeof(*pipe_wm));



	for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {

		ps = drm_atomic_get_plane_state(state,