drm/i915: Introduce encoder->get_buf_trans()

Convert the get_buf_trans() functions into an encoder vfunc.
Allows us to get rid of bunch of platform if-ladders.

v2: Handle adl-p
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210608073603.2408-10-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_crt.c

@@ -38,6 +38,7 @@
 #include "intel_crt.h"
 #include "intel_crtc.h"
 #include "intel_ddi.h"
+#include "intel_ddi_buf_trans.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
 #include "intel_fdi.h"
@@ -1081,6 +1082,8 @@ void intel_crt_init(struct drm_i915_private *dev_priv)
 		crt->base.enable_clock = hsw_ddi_enable_clock;
 		crt->base.disable_clock = hsw_ddi_disable_clock;
 		crt->base.is_clock_enabled = hsw_ddi_is_clock_enabled;
+
+		intel_ddi_buf_trans_init(&crt->base);
 	} else {
 		if (HAS_PCH_SPLIT(dev_priv)) {
 			crt->base.compute_config = pch_crt_compute_config;

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -104,8 +104,7 @@ void hsw_prepare_dp_ddi_buffers(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	const struct intel_ddi_buf_trans *ddi_translations;
 
-	ddi_translations = hsw_get_buf_trans(encoder, crtc_state, &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 
@@ -137,8 +136,7 @@ static void hsw_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	const struct intel_ddi_buf_trans *ddi_translations;
 
-	ddi_translations = hsw_get_buf_trans(encoder, crtc_state,  &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -947,8 +945,7 @@ static void skl_ddi_set_iboost(struct intel_encoder *encoder,
 		const struct intel_ddi_buf_trans *ddi_translations;
 		int n_entries;
 
-		ddi_translations = hsw_get_buf_trans(encoder, crtc_state, &n_entries);
-
+		ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 		if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 			return;
 		if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -978,7 +975,7 @@ static void bxt_ddi_vswing_sequence(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	int n_entries;
 
-	ddi_translations = bxt_get_buf_trans(encoder, crtc_state, &n_entries);
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -996,33 +993,9 @@ static u8 intel_ddi_dp_voltage_max(struct intel_dp *intel_dp,
 {
 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = encoder->port;
-	enum phy phy = intel_port_to_phy(dev_priv, port);
 	int n_entries;
 
-	if (DISPLAY_VER(dev_priv) >= 12) {
-		if (intel_phy_is_combo(dev_priv, phy))
-			tgl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-		else if (IS_ALDERLAKE_P(dev_priv))
-			adlp_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
-		else
-			tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
-	} else if (DISPLAY_VER(dev_priv) == 11) {
-		if (IS_PLATFORM(dev_priv, INTEL_JASPERLAKE))
-			jsl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-		else if (IS_PLATFORM(dev_priv, INTEL_ELKHARTLAKE))
-			ehl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-		else if (intel_phy_is_combo(dev_priv, phy))
-			icl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-		else
-			icl_get_mg_buf_trans(encoder, crtc_state, &n_entries);
-	} else if (IS_CANNONLAKE(dev_priv)) {
-		cnl_get_buf_trans(encoder, crtc_state, &n_entries);
-	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
-		bxt_get_buf_trans(encoder, crtc_state, &n_entries);
-	} else {
-		hsw_get_buf_trans(encoder, crtc_state, &n_entries);
-	}
+	encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 
 	if (drm_WARN_ON(&dev_priv->drm, n_entries < 1))
 		n_entries = 1;
@@ -1054,8 +1027,7 @@ static void cnl_ddi_vswing_program(struct intel_encoder *encoder,
 	int n_entries, ln;
 	u32 val;
 
-	ddi_translations = cnl_get_buf_trans(encoder, crtc_state, &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -1175,15 +1147,7 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 	int n_entries, ln;
 	u32 val;
 
-	if (DISPLAY_VER(dev_priv) >= 12)
-		ddi_translations = tgl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-	else if (IS_PLATFORM(dev_priv, INTEL_JASPERLAKE))
-		ddi_translations = jsl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-	else if (IS_PLATFORM(dev_priv, INTEL_ELKHARTLAKE))
-		ddi_translations = ehl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-	else
-		ddi_translations = icl_get_combo_buf_trans(encoder, crtc_state, &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -1310,8 +1274,7 @@ static void icl_mg_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
 	if (enc_to_dig_port(encoder)->tc_mode == TC_PORT_TBT_ALT)
 		return;
 
-	ddi_translations = icl_get_mg_buf_trans(encoder, crtc_state, &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -1448,11 +1411,7 @@ tgl_dkl_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
 	if (enc_to_dig_port(encoder)->tc_mode == TC_PORT_TBT_ALT)
 		return;
 
-	if (IS_ALDERLAKE_P(dev_priv))
-		ddi_translations = adlp_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
-	else
-		ddi_translations = tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
-
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))
 		return;
 	if (drm_WARN_ON_ONCE(&dev_priv->drm, level >= n_entries))
@@ -4693,6 +4652,8 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 		encoder->get_config = hsw_ddi_get_config;
 	}
 
+	intel_ddi_buf_trans_init(encoder);
+
 	if (DISPLAY_VER(dev_priv) >= 13)
 		encoder->hpd_pin = xelpd_hpd_pin(dev_priv, port);
 	else if (IS_DG1(dev_priv))

drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c

@@ -1246,7 +1246,7 @@ hsw_get_buf_trans_hdmi(struct intel_encoder *encoder,
 	return NULL;
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 hsw_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries)
@@ -1286,7 +1286,7 @@ bxt_get_buf_trans_hdmi(struct intel_encoder *encoder, int *n_entries)
 	return intel_get_buf_trans(&bxt_ddi_translations_hdmi, n_entries);
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 bxt_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries)
@@ -1368,7 +1368,7 @@ cnl_get_buf_trans_edp(struct intel_encoder *encoder, int *n_entries)
 	}
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 cnl_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries)
@@ -1422,7 +1422,7 @@ icl_get_combo_buf_trans_edp(struct intel_encoder *encoder,
 	return icl_get_combo_buf_trans_dp(encoder, crtc_state, n_entries);
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 icl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries)
@@ -1458,7 +1458,7 @@ icl_get_mg_buf_trans_dp(struct intel_encoder *encoder,
 	}
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 icl_get_mg_buf_trans(struct intel_encoder *encoder,
 		     const struct intel_crtc_state *crtc_state,
 		     int *n_entries)
@@ -1502,7 +1502,7 @@ ehl_get_combo_buf_trans_edp(struct intel_encoder *encoder,
 	return ehl_get_combo_buf_trans_dp(encoder, crtc_state, n_entries);
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 ehl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries)
@@ -1553,7 +1553,7 @@ jsl_get_combo_buf_trans_edp(struct intel_encoder *encoder,
 	return jsl_get_combo_buf_trans_dp(encoder, crtc_state, n_entries);
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 jsl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries)
@@ -1626,7 +1626,7 @@ tgl_get_combo_buf_trans_edp(struct intel_encoder *encoder,
 	return tgl_get_combo_buf_trans_dp(encoder, crtc_state, n_entries);
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 tgl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries)
@@ -1662,7 +1662,7 @@ tgl_get_dkl_buf_trans_dp(struct intel_encoder *encoder,
 	}
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 tgl_get_dkl_buf_trans(struct intel_encoder *encoder,
 		      const struct intel_crtc_state *crtc_state,
 		      int *n_entries)
@@ -1687,7 +1687,7 @@ adlp_get_dkl_buf_trans_dp(struct intel_encoder *encoder,
 	}
 }
 
-const struct intel_ddi_buf_trans *
+static const struct intel_ddi_buf_trans *
 adlp_get_dkl_buf_trans(struct intel_encoder *encoder,
 		       const struct intel_crtc_state *crtc_state,
 		       int *n_entries)
@@ -1703,28 +1703,10 @@ int intel_ddi_hdmi_num_entries(struct intel_encoder *encoder,
 			       int *default_entry)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
-	const struct intel_ddi_buf_trans *ddi_translations = NULL;
+	const struct intel_ddi_buf_trans *ddi_translations;
 	int n_entries;
 
-	if (DISPLAY_VER(dev_priv) >= 12) {
-		if (intel_phy_is_combo(dev_priv, phy))
-			ddi_translations = tgl_get_combo_buf_trans_hdmi(encoder, crtc_state, &n_entries);
-		else
-			ddi_translations = tgl_get_dkl_buf_trans_hdmi(encoder, crtc_state, &n_entries);
-	} else if (DISPLAY_VER(dev_priv) == 11) {
-		if (intel_phy_is_combo(dev_priv, phy))
-			ddi_translations = icl_get_combo_buf_trans_hdmi(encoder, crtc_state, &n_entries);
-		else
-			ddi_translations = icl_get_mg_buf_trans_hdmi(encoder, crtc_state, &n_entries);
-	} else if (IS_CANNONLAKE(dev_priv)) {
-		ddi_translations = cnl_get_buf_trans_hdmi(encoder, &n_entries);
-	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
-		ddi_translations = bxt_get_buf_trans_hdmi(encoder, &n_entries);
-	} else if (DISPLAY_VER(dev_priv) == 9 ||
-		   IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) {
-		ddi_translations = hsw_get_buf_trans_hdmi(encoder, &n_entries);
-	}
+	ddi_translations = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 
 	if (drm_WARN_ON(&dev_priv->drm, !ddi_translations)) {
 		*default_entry = 0;
@@ -1735,3 +1717,36 @@ int intel_ddi_hdmi_num_entries(struct intel_encoder *encoder,
 
 	return n_entries;
 }
+
+void intel_ddi_buf_trans_init(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	if (IS_ALDERLAKE_P(i915)) {
+		if (intel_phy_is_combo(i915, phy))
+			encoder->get_buf_trans = tgl_get_combo_buf_trans;
+		else
+			encoder->get_buf_trans = adlp_get_dkl_buf_trans;
+	} else if (DISPLAY_VER(i915) >= 12) {
+		if (intel_phy_is_combo(i915, phy))
+			encoder->get_buf_trans = tgl_get_combo_buf_trans;
+		else
+			encoder->get_buf_trans = tgl_get_dkl_buf_trans;
+	} else if (DISPLAY_VER(i915) == 11) {
+		if (IS_PLATFORM(i915, INTEL_JASPERLAKE))
+			encoder->get_buf_trans = jsl_get_combo_buf_trans;
+		else if (IS_PLATFORM(i915, INTEL_ELKHARTLAKE))
+			encoder->get_buf_trans = ehl_get_combo_buf_trans;
+		else if (intel_phy_is_combo(i915, phy))
+			encoder->get_buf_trans = icl_get_combo_buf_trans;
+		else
+			encoder->get_buf_trans = icl_get_mg_buf_trans;
+	} else if (IS_CANNONLAKE(i915)) {
+		encoder->get_buf_trans = cnl_get_buf_trans;
+	} else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915)) {
+		encoder->get_buf_trans = bxt_get_buf_trans;
+	} else {
+		encoder->get_buf_trans = hsw_get_buf_trans;
+	}
+}

drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h

@@ -65,48 +65,6 @@ int intel_ddi_hdmi_num_entries(struct intel_encoder *encoder,
 			       const struct intel_crtc_state *crtc_state,
 			       int *default_entry);
 
-const struct intel_ddi_buf_trans *
-hsw_get_buf_trans(struct intel_encoder *encoder,
-		  const struct intel_crtc_state *crtc_state,
-		  int *n_entries);
-
-const struct intel_ddi_buf_trans *
-bxt_get_buf_trans(struct intel_encoder *encoder,
-		  const struct intel_crtc_state *crtc_state,
-		  int *n_entries);
-
-const struct intel_ddi_buf_trans *
-adlp_get_dkl_buf_trans(struct intel_encoder *encoder,
-		       const struct intel_crtc_state *crtc_state,
-		       int *n_entries);
-const struct intel_ddi_buf_trans *
-tgl_get_combo_buf_trans(struct intel_encoder *encoder,
-			const struct intel_crtc_state *crtc_state,
-			int *n_entries);
-const struct intel_ddi_buf_trans *
-tgl_get_dkl_buf_trans(struct intel_encoder *encoder,
-		      const struct intel_crtc_state *crtc_state,
-		      int *n_entries);
-const struct intel_ddi_buf_trans *
-jsl_get_combo_buf_trans(struct intel_encoder *encoder,
-			const struct intel_crtc_state *crtc_state,
-			int *n_entries);
-const struct intel_ddi_buf_trans *
-ehl_get_combo_buf_trans(struct intel_encoder *encoder,
-			const struct intel_crtc_state *crtc_state,
-			int *n_entries);
-const struct intel_ddi_buf_trans *
-icl_get_combo_buf_trans(struct intel_encoder *encoder,
-			const struct intel_crtc_state *crtc_state,
-			int *n_entries);
-const struct intel_ddi_buf_trans *
-icl_get_mg_buf_trans(struct intel_encoder *encoder,
-		     const struct intel_crtc_state *crtc_state,
-		     int *n_entries);
-
-const struct intel_ddi_buf_trans *
-cnl_get_buf_trans(struct intel_encoder *encoder,
-		  const struct intel_crtc_state *crtc_state,
-		  int *n_entries);
+void intel_ddi_buf_trans_init(struct intel_encoder *encoder);
 
 #endif

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -48,6 +48,7 @@
 
 struct drm_printer;
 struct __intel_global_objs_state;
+struct intel_ddi_buf_trans;
 
 /*
  * Display related stuff
@@ -263,6 +264,9 @@ struct intel_encoder {
 	 * Returns whether the port clock is enabled or not.
 	 */
 	bool (*is_clock_enabled)(struct intel_encoder *encoder);
+	const struct intel_ddi_buf_trans *(*get_buf_trans)(struct intel_encoder *encoder,
+							   const struct intel_crtc_state *crtc_state,
+							   int *n_entries);
 	enum hpd_pin hpd_pin;
 	enum intel_display_power_domain power_domain;
 	/* for communication with audio component; protected by av_mutex */

drivers/gpu/drm/i915/display/intel_fdi.c

@@ -4,7 +4,6 @@
  */
 #include "intel_atomic.h"
 #include "intel_ddi.h"
-#include "intel_ddi_buf_trans.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
 #include "intel_fdi.h"
@@ -569,7 +568,7 @@ void hsw_fdi_link_train(struct intel_encoder *encoder,
 	u32 temp, i, rx_ctl_val;
 	int n_entries;
 
-	hsw_get_buf_trans(encoder, crtc_state, &n_entries);
+	encoder->get_buf_trans(encoder, crtc_state, &n_entries);
 
 	hsw_prepare_dp_ddi_buffers(encoder, crtc_state);