[Intel-gfx] [PATCH 3/3] RFC drm/i915: Don't increase the BW when WA is not required.

[Rodrigo Vivi]

Based on patch submited to intel-gfx:
"drm/i915/cnl: don't apply the GEN9/CNL:A WM WAs to CNL:B+"
and subsequential tests on CNL, it seems that
this part is not required if we are not applying WA#0893.

Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 919235c..85d9705 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4356,7 +4356,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	res_lines = div_round_up_fixed16(selected_result,
 					 plane_blocks_per_line);
 
-	if (level >= 1 && level <= 7) {
+	if (NEEDS_WaIncreaseMemoryBW(dev_priv) && level >= 1 && level <= 7) {
 		if (y_tiled) {
 			res_blocks += fixed_16_16_to_u32_round_up(y_tile_minimum);
 			res_lines += y_min_scanlines;
-- 
1.9.1