drm/i915: Accept alloc_size == blocks

If the minimum required ddb space for all the planes equals the
total ddb space available we are allowed to use the relevant
watermark level.

Cc: Neel Desai <neel.desai@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190312205844.6339-2-ville.syrjala@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d73b13c..07351ce 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4378,7 +4378,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
                        blocks += wm->uv_wm[level].min_ddb_alloc;
                }
 
-               if (blocks < alloc_size) {
+               if (blocks <= alloc_size) {
                        alloc_size -= blocks;
                        break;
                }