[Intel-gfx] [RFC PATCH] drm/i915: push shared dpll enable to encoders on DDI platforms

[Jani Nikula]

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_crt.c     |  3 +++
 drivers/gpu/drm/i915/intel_ddi.c     | 18 ++++++++++++++++++
 drivers/gpu/drm/i915/intel_display.c |  3 ---
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 668e8c3e791d..b3094d606329 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -255,6 +255,9 @@ static void hsw_pre_pll_enable_crt(struct intel_encoder *encoder,
 	WARN_ON(!intel_crtc->config->has_pch_encoder);
 
 	intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
+
+	if (intel_crtc->config->shared_dpll)
+		intel_enable_shared_dpll(intel_crtc);
 }
 
 static void hsw_pre_enable_crt(struct intel_encoder *encoder,
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index f1adc2544ab9..c1152c602f08 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2407,13 +2407,29 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder,
 	}
 }
 
+static void intel_ddi_pre_pll_enable(struct intel_encoder *encoder,
+				     const struct intel_crtc_state *pipe_config,
+				     const struct drm_connector_state *conn_state)
+{
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	if (intel_crtc->config->shared_dpll)
+		intel_enable_shared_dpll(intel_crtc);
+}
+
 static void bxt_ddi_pre_pll_enable(struct intel_encoder *encoder,
 				   const struct intel_crtc_state *pipe_config,
 				   const struct drm_connector_state *conn_state)
 {
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	uint8_t mask = pipe_config->lane_lat_optim_mask;
 
 	bxt_ddi_phy_set_lane_optim_mask(encoder, mask);
+
+	if (intel_crtc->config->shared_dpll)
+		intel_enable_shared_dpll(intel_crtc);
 }
 
 void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
@@ -2714,6 +2730,8 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 	intel_encoder->enable = intel_enable_ddi;
 	if (IS_GEN9_LP(dev_priv))
 		intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
+	else
+		intel_encoder->pre_pll_enable = intel_ddi_pre_pll_enable;
 	intel_encoder->pre_enable = intel_ddi_pre_enable;
 	intel_encoder->disable = intel_disable_ddi;
 	intel_encoder->post_disable = intel_ddi_post_disable;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9f2bf3b3f759..6d0573350786 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5490,9 +5490,6 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
 
 	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
 
-	if (intel_crtc->config->shared_dpll)
-		intel_enable_shared_dpll(intel_crtc);
-
 	if (intel_crtc_has_dp_encoder(intel_crtc->config))
 		intel_dp_set_m_n(intel_crtc, M1_N1);
 
-- 
2.11.0