[PATCH v2 09/10] drm/i915/xe3lpd: Add check to see if edp over type c is allowed

[Matt Atwood <matthew.s.atwood@intel.com>]

From: Suraj Kandpal <suraj.kandpal@intel.com>

Read PICA register to see if edp over type C is possible and then
add the appropriate tables for it.

Bspec: 68846
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
---
 drivers/gpu/drm/i915/display/intel_cx0_phy.c     |  2 ++
 .../gpu/drm/i915/display/intel_display_types.h   |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c          | 16 ++++++++++++++++
 drivers/gpu/drm/i915/i915_reg.h                  |  3 +++
 4 files changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index f1aea5ead41b..342cd508d6f6 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -2261,6 +2261,8 @@ intel_c20_pll_tables_get(struct intel_crtc_state *crtc_state,
 		if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP)) {
 			if (DISPLAY_VER_FULL(i915) == IP_VER(14, 1))
 				return xe2hpd_c20_edp_tables;
+			if (DISPLAY_VER(i915) >= 30 && encoder->typec_supp)
+				return xe3lpd_c20_dp_edp_tables;
 		}
 
 		if (DISPLAY_VER_FULL(i915) == IP_VER(14, 1))
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 2bb1fa64da2f..e9dc7707fbcd 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -158,6 +158,7 @@ struct intel_encoder {
 	enum port port;
 	u16 cloneable;
 	u8 pipe_mask;
+	bool typec_supp;
 
 	/* Check and recover a bad link state. */
 	struct delayed_work link_check_work;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index fbb096be02ad..917a503cc43b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5570,6 +5570,20 @@ intel_dp_detect_sdp_caps(struct intel_dp *intel_dp)
 		drm_dp_as_sdp_supported(&intel_dp->aux, intel_dp->dpcd);
 }
 
+static void
+intel_dp_check_edp_typec_supp(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	bool is_tc_port = intel_encoder_is_tc(encoder);
+	u32 ret = 0;
+
+	if (encoder->type != INTEL_OUTPUT_EDP || !is_tc_port)
+		return;
+
+	ret = intel_de_read(i915, PICA_PHY_CONFIG_CONTROL);
+	encoder->typec_supp = ret & EDP_ON_TYPEC;
+}
+
 static int
 intel_dp_detect(struct drm_connector *connector,
 		struct drm_modeset_acquire_ctx *ctx,
@@ -5595,6 +5609,8 @@ intel_dp_detect(struct drm_connector *connector,
 	if (!intel_display_driver_check_access(dev_priv))
 		return connector->status;
 
+	intel_dp_check_edp_typec_supp(encoder);
+
 	/* Can't disconnect eDP */
 	if (intel_dp_is_edp(intel_dp))
 		status = edp_detect(intel_dp);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fc30e0056b07..387ab40e3dd0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4584,4 +4584,7 @@ enum skl_power_gate {
 
 #define MTL_MEDIA_GSI_BASE		0x380000
 
+#define PICA_PHY_CONFIG_CONTROL 	_MMIO(0x16FE68)
+#define   EDP_ON_TYPEC			REG_BIT(31)
+
 #endif /* _I915_REG_H_ */
-- 
2.45.0