drm/i915: Move DDI clock readout to encoder->get_config()

Move the *_get_ddi_pll() stuff into the encodet->get_config() hook.
There it neatly sits next to the matching .{enable,disable}_clock()
functions.

In order to avoid excessive boilerplate I changed the behaviour
such that all platforms now do the readout via
crtc_state->port_dpll[].

ICL+ TC is still a bit special due to TBTPLL not having a functional
.get_freq(). Should probably change that by adopting the LCPLL
approach, but that would require a fairly substantial rework of the
DPLL ID handling. So leave it for later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210224144214.24803-5-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>

5 files changed, 306 insertions, 250 deletions

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 05d5709ae537..29fe4919392a 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1490,14 +1490,10 @@ static void gen11_dsi_get_cmd_mode_config(struct intel_dsi *intel_dsi,
 static void gen11_dsi_get_config(struct intel_encoder *encoder,
 				 struct intel_crtc_state *pipe_config)
 {
-	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 
-	/* FIXME: adapt icl_ddi_clock_get() for DSI and use that? */
-	pipe_config->port_clock = intel_dpll_get_freq(i915,
-						      pipe_config->shared_dpll,
-						      &pipe_config->dpll_hw_state);
+	intel_ddi_get_clock(encoder, pipe_config, icl_ddi_combo_get_pll(encoder));
 
 	pipe_config->hw.adjusted_mode.crtc_clock = intel_dsi->pclk;
 	if (intel_dsi->dual_link)
diff --git a/drivers/gpu/drm/i915/display/intel_crt.c b/drivers/gpu/drm/i915/display/intel_crt.c
index 91a8a42b4aa2..b03f74076f64 100644
--- a/drivers/gpu/drm/i915/display/intel_crt.c
+++ b/drivers/gpu/drm/i915/display/intel_crt.c
@@ -142,7 +142,7 @@ static void hsw_crt_get_config(struct intel_encoder *encoder,
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 
-	intel_ddi_get_config(encoder, pipe_config);
+	hsw_ddi_get_config(encoder, pipe_config);
 
 	pipe_config->hw.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC |
 					      DRM_MODE_FLAG_NHSYNC |
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index c0ace39bbfdf..e88e3bb0c39d 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -303,25 +303,6 @@ static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
 	pipe_config->hw.adjusted_mode.crtc_clock = dotclock;
 }
 
-static void intel_ddi_clock_get(struct intel_encoder *encoder,
-				struct intel_crtc_state *pipe_config)
-{
-	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
-
-	if (intel_phy_is_tc(dev_priv, phy) &&
-	    intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll) ==
-	    DPLL_ID_ICL_TBTPLL)
-		pipe_config->port_clock = icl_calc_tbt_pll_link(dev_priv,
-								encoder->port);
-	else
-		pipe_config->port_clock =
-			intel_dpll_get_freq(dev_priv, pipe_config->shared_dpll,
-					    &pipe_config->dpll_hw_state);
-
-	ddi_dotclock_get(pipe_config);
-}
-
 void intel_ddi_set_dp_msa(const struct intel_crtc_state *crtc_state,
 			  const struct drm_connector_state *conn_state)
 {
@@ -1607,6 +1588,17 @@ static void _cnl_ddi_disable_clock(struct drm_i915_private *i915, i915_reg_t reg
 	mutex_unlock(&i915->dpll.lock);
 }
 
+static struct intel_shared_dpll *
+_cnl_ddi_get_pll(struct drm_i915_private *i915, i915_reg_t reg,
+		 u32 clk_sel_mask, u32 clk_sel_shift)
+{
+	enum intel_dpll_id id;
+
+	id = (intel_de_read(i915, reg) & clk_sel_mask) >> clk_sel_shift;
+
+	return intel_get_shared_dpll_by_id(i915, id);
+}
+
 static void adls_ddi_enable_clock(struct intel_encoder *encoder,
 				  const struct intel_crtc_state *crtc_state)
 {
@@ -1632,6 +1624,16 @@ static void adls_ddi_disable_clock(struct intel_encoder *encoder)
 			       ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
 }
 
+static struct intel_shared_dpll *adls_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	return _cnl_ddi_get_pll(i915, ADLS_DPCLKA_CFGCR(phy),
+				ADLS_DPCLKA_CFGCR_DDI_CLK_SEL_MASK(phy),
+				ADLS_DPCLKA_CFGCR_DDI_SHIFT(phy));
+}
+
 static void rkl_ddi_enable_clock(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
@@ -1657,6 +1659,16 @@ static void rkl_ddi_disable_clock(struct intel_encoder *encoder)
 			       RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
 }
 
+static struct intel_shared_dpll *rkl_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	return _cnl_ddi_get_pll(i915, ICL_DPCLKA_CFGCR0,
+				RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy),
+				RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy));
+}
+
 static void dg1_ddi_enable_clock(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
@@ -1691,6 +1703,16 @@ static void dg1_ddi_disable_clock(struct intel_encoder *encoder)
 			       DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
 }
 
+static struct intel_shared_dpll *dg1_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	return _cnl_ddi_get_pll(i915, DG1_DPCLKA_CFGCR0(phy),
+				DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy),
+				DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy));
+}
+
 static void icl_ddi_combo_enable_clock(struct intel_encoder *encoder,
 				       const struct intel_crtc_state *crtc_state)
 {
@@ -1716,6 +1738,16 @@ static void icl_ddi_combo_disable_clock(struct intel_encoder *encoder)
 			       ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
 }
 
+struct intel_shared_dpll *icl_ddi_combo_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	return _cnl_ddi_get_pll(i915, ICL_DPCLKA_CFGCR0,
+				ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy),
+				ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy));
+}
+
 static void jsl_ddi_tc_enable_clock(struct intel_encoder *encoder,
 				    const struct intel_crtc_state *crtc_state)
 {
@@ -1783,6 +1815,36 @@ static void icl_ddi_tc_disable_clock(struct intel_encoder *encoder)
 	intel_de_write(i915, DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
 }
 
+static struct intel_shared_dpll *icl_ddi_tc_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum tc_port tc_port = intel_port_to_tc(i915, encoder->port);
+	enum port port = encoder->port;
+	enum intel_dpll_id id;
+	u32 tmp;
+
+	tmp = intel_de_read(i915, DDI_CLK_SEL(port));
+
+	switch (tmp & DDI_CLK_SEL_MASK) {
+	case DDI_CLK_SEL_TBT_162:
+	case DDI_CLK_SEL_TBT_270:
+	case DDI_CLK_SEL_TBT_540:
+	case DDI_CLK_SEL_TBT_810:
+		id = DPLL_ID_ICL_TBTPLL;
+		break;
+	case DDI_CLK_SEL_MG:
+		id = icl_tc_port_to_pll_id(tc_port);
+		break;
+	default:
+		MISSING_CASE(tmp);
+		fallthrough;
+	case DDI_CLK_SEL_NONE:
+		return NULL;
+	}
+
+	return intel_get_shared_dpll_by_id(i915, id);
+}
+
 static void cnl_ddi_enable_clock(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
@@ -1808,6 +1870,39 @@ static void cnl_ddi_disable_clock(struct intel_encoder *encoder)
 			       DPCLKA_CFGCR0_DDI_CLK_OFF(port));
 }
 
+static struct intel_shared_dpll *cnl_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
+
+	return _cnl_ddi_get_pll(i915, DPCLKA_CFGCR0,
+				DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port),
+				DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port));
+}
+
+static struct intel_shared_dpll *bxt_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum intel_dpll_id id;
+
+	switch (encoder->port) {
+	case PORT_A:
+		id = DPLL_ID_SKL_DPLL0;
+		break;
+	case PORT_B:
+		id = DPLL_ID_SKL_DPLL1;
+		break;
+	case PORT_C:
+		id = DPLL_ID_SKL_DPLL2;
+		break;
+	default:
+		MISSING_CASE(encoder->port);
+		return NULL;
+	}
+
+	return intel_get_shared_dpll_by_id(i915, id);
+}
+
 static void skl_ddi_enable_clock(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
@@ -1842,6 +1937,28 @@ static void skl_ddi_disable_clock(struct intel_encoder *encoder)
 	mutex_unlock(&i915->dpll.lock);
 }
 
+static struct intel_shared_dpll *skl_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
+	enum intel_dpll_id id;
+	u32 tmp;
+
+	tmp = intel_de_read(i915, DPLL_CTRL2);
+
+	/*
+	 * FIXME Not sure if the override affects both
+	 * the PLL selection and the CLK_OFF bit.
+	 */
+	if ((tmp & DPLL_CTRL2_DDI_SEL_OVERRIDE(port)) == 0)
+		return NULL;
+
+	id = (tmp & DPLL_CTRL2_DDI_CLK_SEL_MASK(port)) >>
+		DPLL_CTRL2_DDI_CLK_SEL_SHIFT(port);
+
+	return intel_get_shared_dpll_by_id(i915, id);
+}
+
 void hsw_ddi_enable_clock(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state)
 {
@@ -1863,6 +1980,44 @@ void hsw_ddi_disable_clock(struct intel_encoder *encoder)
 	intel_de_write(i915, PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
 }
 
+static struct intel_shared_dpll *hsw_ddi_get_pll(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
+	enum intel_dpll_id id;
+	u32 tmp;
+
+	tmp = intel_de_read(i915, PORT_CLK_SEL(port));
+
+	switch (tmp & PORT_CLK_SEL_MASK) {
+	case PORT_CLK_SEL_WRPLL1:
+		id = DPLL_ID_WRPLL1;
+		break;
+	case PORT_CLK_SEL_WRPLL2:
+		id = DPLL_ID_WRPLL2;
+		break;
+	case PORT_CLK_SEL_SPLL:
+		id = DPLL_ID_SPLL;
+		break;
+	case PORT_CLK_SEL_LCPLL_810:
+		id = DPLL_ID_LCPLL_810;
+		break;
+	case PORT_CLK_SEL_LCPLL_1350:
+		id = DPLL_ID_LCPLL_1350;
+		break;
+	case PORT_CLK_SEL_LCPLL_2700:
+		id = DPLL_ID_LCPLL_2700;
+		break;
+	default:
+		MISSING_CASE(tmp);
+		fallthrough;
+	case PORT_CLK_SEL_NONE:
+		return NULL;
+	}
+
+	return intel_get_shared_dpll_by_id(i915, id);
+}
+
 void intel_ddi_enable_clock(struct intel_encoder *encoder,
 			    const struct intel_crtc_state *crtc_state)
 {
@@ -3363,8 +3518,8 @@ static void intel_ddi_read_func_ctl(struct intel_encoder *encoder,
 	}
 }
 
-void intel_ddi_get_config(struct intel_encoder *encoder,
-			  struct intel_crtc_state *pipe_config)
+static void intel_ddi_get_config(struct intel_encoder *encoder,
+				 struct intel_crtc_state *pipe_config)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
@@ -3413,7 +3568,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 	}
 
 	if (!pipe_config->bigjoiner_slave)
-		intel_ddi_clock_get(encoder, pipe_config);
+		ddi_dotclock_get(pipe_config);
 
 	if (IS_GEN9_LP(dev_priv))
 		pipe_config->lane_lat_optim_mask =
@@ -3443,6 +3598,114 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 	intel_read_dp_sdp(encoder, pipe_config, DP_SDP_VSC);
 }
 
+void intel_ddi_get_clock(struct intel_encoder *encoder,
+			 struct intel_crtc_state *crtc_state,
+			 struct intel_shared_dpll *pll)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum icl_port_dpll_id port_dpll_id = ICL_PORT_DPLL_DEFAULT;
+	struct icl_port_dpll *port_dpll = &crtc_state->icl_port_dplls[port_dpll_id];
+	bool pll_active;
+
+	port_dpll->pll = pll;
+	pll_active = intel_dpll_get_hw_state(i915, pll, &port_dpll->hw_state);
+	drm_WARN_ON(&i915->drm, !pll_active);
+
+	icl_set_active_port_dpll(crtc_state, port_dpll_id);
+
+	crtc_state->port_clock = intel_dpll_get_freq(i915, crtc_state->shared_dpll,
+						     &crtc_state->dpll_hw_state);
+}
+
+static void adls_ddi_get_config(struct intel_encoder *encoder,
+				struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, adls_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void rkl_ddi_get_config(struct intel_encoder *encoder,
+			       struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, rkl_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void dg1_ddi_get_config(struct intel_encoder *encoder,
+			       struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, dg1_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void icl_ddi_combo_get_config(struct intel_encoder *encoder,
+				     struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, icl_ddi_combo_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void icl_ddi_tc_get_config(struct intel_encoder *encoder,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum icl_port_dpll_id port_dpll_id;
+	struct icl_port_dpll *port_dpll;
+	struct intel_shared_dpll *pll;
+	bool pll_active;
+
+	pll = icl_ddi_tc_get_pll(encoder);
+
+	if (intel_get_shared_dpll_id(i915, pll) == DPLL_ID_ICL_TBTPLL)
+		port_dpll_id = ICL_PORT_DPLL_DEFAULT;
+	else
+		port_dpll_id = ICL_PORT_DPLL_MG_PHY;
+
+	port_dpll = &crtc_state->icl_port_dplls[port_dpll_id];
+
+	port_dpll->pll = pll;
+	pll_active = intel_dpll_get_hw_state(i915, pll, &port_dpll->hw_state);
+	drm_WARN_ON(&i915->drm, !pll_active);
+
+	icl_set_active_port_dpll(crtc_state, port_dpll_id);
+
+	if (intel_get_shared_dpll_id(i915, crtc_state->shared_dpll) == DPLL_ID_ICL_TBTPLL)
+		crtc_state->port_clock = icl_calc_tbt_pll_link(i915, encoder->port);
+	else
+		crtc_state->port_clock = intel_dpll_get_freq(i915, crtc_state->shared_dpll,
+							     &crtc_state->dpll_hw_state);
+
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void cnl_ddi_get_config(struct intel_encoder *encoder,
+			       struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, cnl_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void bxt_ddi_get_config(struct intel_encoder *encoder,
+			       struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, bxt_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+static void skl_ddi_get_config(struct intel_encoder *encoder,
+			       struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, skl_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
+void hsw_ddi_get_config(struct intel_encoder *encoder,
+			struct intel_crtc_state *crtc_state)
+{
+	intel_ddi_get_clock(encoder, crtc_state, hsw_ddi_get_pll(encoder));
+	intel_ddi_get_config(encoder, crtc_state);
+}
+
 static void intel_ddi_sync_state(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
@@ -4129,7 +4392,6 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 	encoder->post_disable = intel_ddi_post_disable;
 	encoder->update_pipe = intel_ddi_update_pipe;
 	encoder->get_hw_state = intel_ddi_get_hw_state;
-	encoder->get_config = intel_ddi_get_config;
 	encoder->sync_state = intel_ddi_sync_state;
 	encoder->initial_fastset_check = intel_ddi_initial_fastset_check;
 	encoder->suspend = intel_dp_encoder_suspend;
@@ -4145,37 +4407,50 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 	if (IS_ALDERLAKE_S(dev_priv)) {
 		encoder->enable_clock = adls_ddi_enable_clock;
 		encoder->disable_clock = adls_ddi_disable_clock;
+		encoder->get_config = adls_ddi_get_config;
 	} else if (IS_ROCKETLAKE(dev_priv)) {
 		encoder->enable_clock = rkl_ddi_enable_clock;
 		encoder->disable_clock = rkl_ddi_disable_clock;
+		encoder->get_config = rkl_ddi_get_config;
 	} else if (IS_DG1(dev_priv)) {
 		encoder->enable_clock = dg1_ddi_enable_clock;
 		encoder->disable_clock = dg1_ddi_disable_clock;
+		encoder->get_config = dg1_ddi_get_config;
 	} else if (IS_JSL_EHL(dev_priv)) {
 		if (intel_ddi_is_tc(dev_priv, port)) {
 			encoder->enable_clock = jsl_ddi_tc_enable_clock;
 			encoder->disable_clock = jsl_ddi_tc_disable_clock;
+			encoder->get_config = icl_ddi_combo_get_config;
 		} else {
 			encoder->enable_clock = icl_ddi_combo_enable_clock;
 			encoder->disable_clock = icl_ddi_combo_disable_clock;
+			encoder->get_config = icl_ddi_combo_get_config;
 		}
 	} else if (INTEL_GEN(dev_priv) >= 11) {
 		if (intel_ddi_is_tc(dev_priv, port)) {
 			encoder->enable_clock = icl_ddi_tc_enable_clock;
 			encoder->disable_clock = icl_ddi_tc_disable_clock;
+			encoder->get_config = icl_ddi_tc_get_config;
 		} else {
 			encoder->enable_clock = icl_ddi_combo_enable_clock;
 			encoder->disable_clock = icl_ddi_combo_disable_clock;
+			encoder->get_config = icl_ddi_combo_get_config;
 		}
 	} else if (IS_CANNONLAKE(dev_priv)) {
 		encoder->enable_clock = cnl_ddi_enable_clock;
 		encoder->disable_clock = cnl_ddi_disable_clock;
+		encoder->get_config = cnl_ddi_get_config;
+	} else if (IS_GEN9_LP(dev_priv)) {
+		/* BXT/GLK have fixed PLL->port mapping */
+		encoder->get_config = bxt_ddi_get_config;
 	} else if (IS_GEN9_BC(dev_priv)) {
 		encoder->enable_clock = skl_ddi_enable_clock;
 		encoder->disable_clock = skl_ddi_disable_clock;
+		encoder->get_config = skl_ddi_get_config;
 	} else if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) {
 		encoder->enable_clock = hsw_ddi_enable_clock;
 		encoder->disable_clock = hsw_ddi_disable_clock;
+		encoder->get_config = hsw_ddi_get_config;
 	}
 
 	if (IS_DG1(dev_priv))
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h b/drivers/gpu/drm/i915/display/intel_ddi.h
index 4a0c1d5c85e7..0780c47efe0f 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.h
+++ b/drivers/gpu/drm/i915/display/intel_ddi.h
@@ -30,9 +30,15 @@ void intel_ddi_fdi_post_disable(struct intel_atomic_state *state,
 				const struct drm_connector_state *old_conn_state);
 void intel_ddi_enable_clock(struct intel_encoder *encoder,
 			    const struct intel_crtc_state *crtc_state);
+void intel_ddi_get_clock(struct intel_encoder *encoder,
+			 struct intel_crtc_state *crtc_state,
+			 struct intel_shared_dpll *pll);
 void hsw_ddi_enable_clock(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state);
 void hsw_ddi_disable_clock(struct intel_encoder *encoder);
+void hsw_ddi_get_config(struct intel_encoder *encoder,
+			struct intel_crtc_state *crtc_state);
+struct intel_shared_dpll *icl_ddi_combo_get_pll(struct intel_encoder *encoder);
 void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder,
 				  const struct intel_crtc_state *crtc_state);
 void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
@@ -48,8 +54,6 @@ void intel_ddi_disable_pipe_clock(const  struct intel_crtc_state *crtc_state);
 void intel_ddi_set_dp_msa(const struct intel_crtc_state *crtc_state,
 			  const struct drm_connector_state *conn_state);
 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);
-void intel_ddi_get_config(struct intel_encoder *encoder,
-			  struct intel_crtc_state *pipe_config);
 void intel_ddi_set_vc_payload_alloc(const struct intel_crtc_state *crtc_state,
 				    bool state);
 void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 78817d0c82e2..18d7f7afc8ee 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6554,212 +6554,6 @@ out:
 	return ret;
 }
 
-static void dg1_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
-			    struct intel_crtc_state *pipe_config)
-{
-	enum icl_port_dpll_id port_dpll_id = ICL_PORT_DPLL_DEFAULT;
-	enum phy phy = intel_port_to_phy(dev_priv, port);
-	struct icl_port_dpll *port_dpll;
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	bool pll_active;
-	u32 clk_sel;
-
-	clk_sel = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy)) & DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
-	id = DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_DPLL_MAP(clk_sel, phy);
-
-	if (WARN_ON(id > DPLL_ID_DG1_DPLL3))
-		return;
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-	port_dpll = &pipe_config->icl_port_dplls[port_dpll_id];
-
-	port_dpll->pll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &port_dpll->hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-
-	icl_set_active_port_dpll(pipe_config, port_dpll_id);
-}
-
-static void icl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
-			    struct intel_crtc_state *pipe_config)
-{
-	enum phy phy = intel_port_to_phy(dev_priv, port);
-	enum icl_port_dpll_id port_dpll_id;
-	struct icl_port_dpll *port_dpll;
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	bool pll_active;
-	i915_reg_t reg;
-	u32 temp;
-
-	if (intel_phy_is_combo(dev_priv, phy)) {
-		u32 mask, shift;
-
-		if (IS_ALDERLAKE_S(dev_priv)) {
-			reg = ADLS_DPCLKA_CFGCR(phy);
-			mask = ADLS_DPCLKA_CFGCR_DDI_CLK_SEL_MASK(phy);
-			shift = ADLS_DPCLKA_CFGCR_DDI_SHIFT(phy);
-		} else if (IS_ROCKETLAKE(dev_priv)) {
-			reg = ICL_DPCLKA_CFGCR0;
-			mask = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
-			shift = RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy);
-		} else {
-			reg = ICL_DPCLKA_CFGCR0;
-			mask = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
-			shift = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy);
-		}
-
-		temp = intel_de_read(dev_priv, reg) & mask;
-		id = temp >> shift;
-		port_dpll_id = ICL_PORT_DPLL_DEFAULT;
-	} else if (intel_phy_is_tc(dev_priv, phy)) {
-		u32 clk_sel = intel_de_read(dev_priv, DDI_CLK_SEL(port)) & DDI_CLK_SEL_MASK;
-
-		if (clk_sel == DDI_CLK_SEL_MG) {
-			id = icl_tc_port_to_pll_id(intel_port_to_tc(dev_priv,
-								    port));
-			port_dpll_id = ICL_PORT_DPLL_MG_PHY;
-		} else {
-			drm_WARN_ON(&dev_priv->drm,
-				    clk_sel < DDI_CLK_SEL_TBT_162);
-			id = DPLL_ID_ICL_TBTPLL;
-			port_dpll_id = ICL_PORT_DPLL_DEFAULT;
-		}
-	} else {
-		drm_WARN(&dev_priv->drm, 1, "Invalid port %x\n", port);
-		return;
-	}
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-	port_dpll = &pipe_config->icl_port_dplls[port_dpll_id];
-
-	port_dpll->pll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &port_dpll->hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-
-	icl_set_active_port_dpll(pipe_config, port_dpll_id);
-}
-
-static void cnl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
-			    struct intel_crtc_state *pipe_config)
-{
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	bool pll_active;
-	u32 temp;
-
-	temp = intel_de_read(dev_priv, DPCLKA_CFGCR0) & DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
-	id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
-
-	if (drm_WARN_ON(&dev_priv->drm, id < SKL_DPLL0 || id > SKL_DPLL2))
-		return;
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-
-	pipe_config->shared_dpll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &pipe_config->dpll_hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-}
-
-static void bxt_get_ddi_pll(struct drm_i915_private *dev_priv,
-				enum port port,
-				struct intel_crtc_state *pipe_config)
-{
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	bool pll_active;
-
-	switch (port) {
-	case PORT_A:
-		id = DPLL_ID_SKL_DPLL0;
-		break;
-	case PORT_B:
-		id = DPLL_ID_SKL_DPLL1;
-		break;
-	case PORT_C:
-		id = DPLL_ID_SKL_DPLL2;
-		break;
-	default:
-		drm_err(&dev_priv->drm, "Incorrect port type\n");
-		return;
-	}
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-
-	pipe_config->shared_dpll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &pipe_config->dpll_hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-}
-
-static void skl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
-			    struct intel_crtc_state *pipe_config)
-{
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	bool pll_active;
-	u32 temp;
-
-	temp = intel_de_read(dev_priv, DPLL_CTRL2) & DPLL_CTRL2_DDI_CLK_SEL_MASK(port);
-	id = temp >> (port * 3 + 1);
-
-	if (drm_WARN_ON(&dev_priv->drm, id < SKL_DPLL0 || id > SKL_DPLL3))
-		return;
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-
-	pipe_config->shared_dpll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &pipe_config->dpll_hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-}
-
-static void hsw_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
-			    struct intel_crtc_state *pipe_config)
-{
-	struct intel_shared_dpll *pll;
-	enum intel_dpll_id id;
-	u32 ddi_pll_sel = intel_de_read(dev_priv, PORT_CLK_SEL(port));
-	bool pll_active;
-
-	switch (ddi_pll_sel) {
-	case PORT_CLK_SEL_WRPLL1:
-		id = DPLL_ID_WRPLL1;
-		break;
-	case PORT_CLK_SEL_WRPLL2:
-		id = DPLL_ID_WRPLL2;
-		break;
-	case PORT_CLK_SEL_SPLL:
-		id = DPLL_ID_SPLL;
-		break;
-	case PORT_CLK_SEL_LCPLL_810:
-		id = DPLL_ID_LCPLL_810;
-		break;
-	case PORT_CLK_SEL_LCPLL_1350:
-		id = DPLL_ID_LCPLL_1350;
-		break;
-	case PORT_CLK_SEL_LCPLL_2700:
-		id = DPLL_ID_LCPLL_2700;
-		break;
-	default:
-		MISSING_CASE(ddi_pll_sel);
-		fallthrough;
-	case PORT_CLK_SEL_NONE:
-		return;
-	}
-
-	pll = intel_get_shared_dpll_by_id(dev_priv, id);
-
-	pipe_config->shared_dpll = pll;
-	pll_active = intel_dpll_get_hw_state(dev_priv, pll,
-					     &pipe_config->dpll_hw_state);
-	drm_WARN_ON(&dev_priv->drm, !pll_active);
-}
-
 static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 				     struct intel_crtc_state *pipe_config,
 				     struct intel_display_power_domain_set *power_domain_set)
@@ -6916,19 +6710,6 @@ static void hsw_get_ddi_port_state(struct intel_crtc *crtc,
 			port = TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp);
 	}
 
-	if (IS_DG1(dev_priv))
-		dg1_get_ddi_pll(dev_priv, port, pipe_config);
-	else if (INTEL_GEN(dev_priv) >= 11)
-		icl_get_ddi_pll(dev_priv, port, pipe_config);
-	else if (IS_CANNONLAKE(dev_priv))
-		cnl_get_ddi_pll(dev_priv, port, pipe_config);
-	else if (IS_GEN9_LP(dev_priv))
-		bxt_get_ddi_pll(dev_priv, port, pipe_config);
-	else if (IS_GEN9_BC(dev_priv))
-		skl_get_ddi_pll(dev_priv, port, pipe_config);
-	else
-		hsw_get_ddi_pll(dev_priv, port, pipe_config);
-
 	/*
 	 * Haswell has only FDI/PCH transcoder A. It is which is connected to
 	 * DDI E. So just check whether this pipe is wired to DDI E and whether