drm/i915: Linetime watermarks are a HSW feature
Linetime watermarks don't exist on ILK/SNB/IVB, so don't compute them
except on HSW.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 3d4daa1..276e98d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2655,7 +2655,8 @@
ilk_compute_wm_level(dev_priv, level, params,
&pipe_wm->wm[level]);
- pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
+ if (IS_HASWELL(dev))
+ pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
/* At least LP0 must be valid */
return ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]);
@@ -3234,7 +3235,8 @@
};
hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
- hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
+ if (IS_HASWELL(dev))
+ hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
if (intel_crtc_active(crtc)) {
u32 tmp = hw->wm_pipe[pipe];