Commit 43aa7e87 authored by Matt Roper's avatar Matt Roper Committed by Maarten Lankhorst

drm/i915/gen9: Drop invalid WARN() during data rate calculation

It's possible to have a non-zero plane mask and still wind up with a
total data rate of zero.  There are two cases where this can happen:

 * planes are active (from the KMS point of view), but are
   all fully clipped (positioned offscreen)
 * the only active plane on a CRTC is the cursor (which is handled
   independently and not counted into the general data rate computations

These are both valid display setups (although unusual), so we need to
drop the WARN().
Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Reviewed-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Testcase: kms_universal_planes.cursor-only-pipe-*
Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466196140-16336-4-git-send-email-matthew.d.roper@intel.com
Cc: stable@vger.kernel.org #v4.7+
parent 1b54a880
...@@ -3115,8 +3115,6 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate) ...@@ -3115,8 +3115,6 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate)
total_data_rate += intel_cstate->wm.skl.plane_y_data_rate[id]; total_data_rate += intel_cstate->wm.skl.plane_y_data_rate[id];
} }
WARN_ON(cstate->plane_mask && total_data_rate == 0);
return total_data_rate; return total_data_rate;
} }
......
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