1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 45f71e6dc544..675e8a2ce988 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1070,6 +1070,17 @@ static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
                 wm_size = wm->max_wm;
         if (wm_size <= 0)
                 wm_size = wm->default_wm;
+
+        /*
+         * Bspec seems to indicate that the value shouldn't be lower than
+         * 'burst size + 1'. Certainly 830 is quite unhappy with low values.
+         * Lets go for 8 which is the burst size since certain platforms
+         * already use a hardcoded 8 (which is what the spec says should be
+         * done).
+         */
+        if (wm_size <= 8)
+                wm_size = 8;
+
         return wm_size;
 }