drm/i915/ddi: add wrapper for calling ->get_buf_trans() hook

Add intel_ddi_buf_trans_get() wrapper for calling the
encoder->get_buf_trans() hooks, allowing for a centralized place to
e.g. check for VBT overrides for the buf translations.

Cc: Michał Grzelak <michal.grzelak@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260415115104.1721008-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

8 files changed, 24 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 7e59409bbf01..d832e44ef62a 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -492,7 +492,7 @@ void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder,
 
 	wakeref = intel_cx0_phy_transaction_begin(encoder);
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans)) {
 		intel_cx0_phy_transaction_end(encoder, wakeref);
 		return;
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 178074316a2c..2681940a5cfe 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -140,7 +140,7 @@ void hsw_prepare_dp_ddi_buffers(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	const struct intel_ddi_buf_trans *trans;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
@@ -172,7 +172,7 @@ static void hsw_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	const struct intel_ddi_buf_trans *trans;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
@@ -1106,7 +1106,7 @@ static void skl_ddi_set_iboost(struct intel_encoder *encoder,
 		const struct intel_ddi_buf_trans *trans;
 		int n_entries;
 
-		trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+		trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 		if (drm_WARN_ON_ONCE(display->drm, !trans))
 			return;
 
@@ -1132,7 +1132,7 @@ static u8 intel_ddi_dp_voltage_max(struct intel_dp *intel_dp,
 	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
 	int n_entries;
 
-	encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 
 	if (drm_WARN_ON(display->drm, n_entries < 1))
 		n_entries = 1;
@@ -1175,7 +1175,7 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 	int n_entries, ln;
 	u32 val;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
@@ -1293,7 +1293,7 @@ static void icl_mg_phy_set_signal_levels(struct intel_encoder *encoder,
 	if (intel_tc_port_in_tbt_alt_mode(enc_to_dig_port(encoder)))
 		return;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
@@ -1394,7 +1394,7 @@ static void tgl_dkl_phy_set_signal_levels(struct intel_encoder *encoder,
 	if (intel_tc_port_in_tbt_alt_mode(enc_to_dig_port(encoder)))
 		return;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
@@ -1511,7 +1511,7 @@ int intel_ddi_level(struct intel_encoder *encoder,
 	const struct intel_ddi_buf_trans *trans;
 	int level, n_entries;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return 0;
 
diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
index 980ab19868b3..4cd1e4d76c7a 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c
@@ -1852,3 +1852,10 @@ void intel_ddi_buf_trans_init(struct intel_encoder *encoder)
 		MISSING_CASE(pdev->device);
 	}
 }
+
+const struct intel_ddi_buf_trans *intel_ddi_buf_trans_get(struct intel_encoder *encoder,
+							  const struct intel_crtc_state *crtc_state,
+							  int *n_entries)
+{
+	return encoder->get_buf_trans(encoder, crtc_state, n_entries);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
index cec332090a20..9698697f3917 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
+++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h
@@ -77,5 +77,8 @@ struct intel_ddi_buf_trans {
 bool is_hobl_buf_trans(const struct intel_ddi_buf_trans *table);
 
 void intel_ddi_buf_trans_init(struct intel_encoder *encoder);
+const struct intel_ddi_buf_trans *
+intel_ddi_buf_trans_get(struct intel_encoder *encoder,
+			const struct intel_crtc_state *crtc_state, int *n_entries);
 
 #endif
diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.c b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
index 0e16132d0923..68802b652316 100644
--- a/drivers/gpu/drm/i915/display/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
@@ -301,7 +301,7 @@ void bxt_dpio_phy_set_signal_levels(struct intel_encoder *encoder,
 	enum dpio_phy phy;
 	int lane, n_entries;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;
 
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c
index 24ce8a7842c7..917f020650af 100644
--- a/drivers/gpu/drm/i915/display/intel_fdi.c
+++ b/drivers/gpu/drm/i915/display/intel_fdi.c
@@ -11,6 +11,7 @@
 #include "intel_atomic.h"
 #include "intel_crtc.h"
 #include "intel_ddi.h"
+#include "intel_ddi_buf_trans.h"
 #include "intel_de.h"
 #include "intel_display_regs.h"
 #include "intel_display_types.h"
@@ -852,7 +853,7 @@ void hsw_fdi_link_train(struct intel_encoder *encoder,
 	u32 temp, i, rx_ctl_val;
 	int n_entries;
 
-	encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 
 	hsw_prepare_dp_ddi_buffers(encoder, crtc_state);
 
diff --git a/drivers/gpu/drm/i915/display/intel_lt_phy.c b/drivers/gpu/drm/i915/display/intel_lt_phy.c
index 657ad5cb0eff..e2f9e1a2745f 100644
--- a/drivers/gpu/drm/i915/display/intel_lt_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_lt_phy.c
@@ -2135,7 +2135,7 @@ void intel_lt_phy_set_signal_levels(struct intel_encoder *encoder,
 
 	wakeref = intel_lt_phy_transaction_begin(encoder);
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans)) {
 		intel_lt_phy_transaction_end(encoder, wakeref);
 		return;
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c
index 295030742294..5e5dde8f3e3a 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c
@@ -72,7 +72,7 @@ void intel_snps_phy_set_signal_levels(struct intel_encoder *encoder,
 	enum phy phy = intel_encoder_to_phy(encoder);
 	int n_entries, ln;
 
-	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
+	trans = intel_ddi_buf_trans_get(encoder, crtc_state, &n_entries);
 	if (drm_WARN_ON_ONCE(display->drm, !trans))
 		return;