[Intel-gfx] [PATCH 2/2] drm/i915/gen9: don't call ilk_pipe_pixel_rate() twice on the same function

[Paulo Zanoni]

We used to call skl_pipe_pixel_rate(), which used to be a single
one-line return, but now we're  calling ilk_pipe_pixel_rate() which is
not as simple, so it's better to just call it once and store the
computed value for reuse.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 000b033..62d730d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3733,14 +3733,18 @@ skl_compute_wm_level(const struct drm_i915_private *dev_priv,
 static uint32_t
 skl_compute_linetime_wm(struct intel_crtc_state *cstate)
 {
+	uint32_t pixel_rate;
+
 	if (!cstate->base.active)
 		return 0;
 
-	if (WARN_ON(ilk_pipe_pixel_rate(cstate) == 0))
+	pixel_rate = ilk_pipe_pixel_rate(cstate);
+
+	if (WARN_ON(pixel_rate == 0))
 		return 0;
 
 	return DIV_ROUND_UP(8 * cstate->base.adjusted_mode.crtc_htotal * 1000,
-			    ilk_pipe_pixel_rate(cstate));
+			    pixel_rate);
 }
 
 static void skl_compute_transition_wm(struct intel_crtc_state *cstate,
-- 
2.7.4