[Intel-gfx] [RFCv2 DP-typeC 1/6] drm/i915/dp: Reuse encoder if it is already available

[Durgadoss R]

We do not need to loop through crtc_state to get the
encoder if we already have a valid one available.

Signed-off-by: Durgadoss R <durgadoss.r at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c     | 11 ++++++++---
 drivers/gpu/drm/i915/intel_display.c |  2 +-
 drivers/gpu/drm/i915/intel_drv.h     |  3 ++-
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b25e99a..9098c12 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1762,11 +1762,16 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
  * function should be folded into compute_config() eventually.
  */
 bool intel_ddi_pll_select(struct intel_crtc *intel_crtc,
-			  struct intel_crtc_state *crtc_state)
+			  struct intel_crtc_state *crtc_state,
+			  struct intel_encoder *valid_encoder)
 {
 	struct drm_device *dev = intel_crtc->base.dev;
-	struct intel_encoder *intel_encoder =
-		intel_ddi_get_crtc_new_encoder(crtc_state);
+	struct intel_encoder *intel_encoder;
+
+	if (valid_encoder)
+		intel_encoder = valid_encoder;
+	else
+		intel_encoder = intel_ddi_get_crtc_new_encoder(crtc_state);
 
 	if (IS_SKYLAKE(dev))
 		return skl_ddi_pll_select(intel_crtc, crtc_state,
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index cddb0c6..8ae6d7b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9661,7 +9661,7 @@ static void broadwell_modeset_commit_cdclk(struct drm_atomic_state *old_state)
 static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
 				      struct intel_crtc_state *crtc_state)
 {
-	if (!intel_ddi_pll_select(crtc, crtc_state))
+	if (!intel_ddi_pll_select(crtc, crtc_state, NULL))
 		return -EINVAL;
 
 	crtc->lowfreq_avail = false;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 91b6b40..0822ab6 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -989,7 +989,8 @@ void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
 void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc);
 void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc);
 bool intel_ddi_pll_select(struct intel_crtc *crtc,
-			  struct intel_crtc_state *crtc_state);
+			  struct intel_crtc_state *crtc_state,
+			  struct intel_encoder *encoder);
 void intel_ddi_set_pipe_settings(struct drm_crtc *crtc);
 void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder);
 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);
-- 
1.9.1