drm/i915/xe2hpd: Add support for eDP PLL configuration

Tables for eDP PHY PLL configuration for different link rates added for
Xe2_HPD. Previous platforms were using C10 PHY for eDP port whereas
Xe2_HPD has C20 PHY.

v2: Updated with a more appropriate Bspec number.

Bspec: 74165
CC: Clint Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240430172850.1881525-8-radhakrishna.sripada@intel.com

drivers/gpu/drm/i915/display/intel_cx0_phy.c

@@ -945,6 +945,148 @@ static const struct intel_c20pll_state * const mtl_c20_dp_tables[] = {
 	NULL,
 };
 
+/*
+ * eDP link rates with 38.4 MHz reference clock.
+ */
+
+static const struct intel_c20pll_state xe2hpd_c20_edp_r216 = {
+	.clock = 216000,
+	.tx = { 0xbe88,
+		0x4800,
+		0x0000,
+		},
+	.cmn = { 0x0500,
+		 0x0005,
+		 0x0000,
+		 0x0000,
+		},
+	.mpllb = { 0x50e1,
+		   0x2120,
+		   0x8e18,
+		   0xbfc1,
+		   0x9000,
+		   0x78f6,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		  },
+};
+
+static const struct intel_c20pll_state xe2hpd_c20_edp_r243 = {
+	.clock = 243000,
+	.tx = { 0xbe88,
+		0x4800,
+		0x0000,
+		},
+	.cmn = { 0x0500,
+		 0x0005,
+		 0x0000,
+		 0x0000,
+		},
+	.mpllb = { 0x50fd,
+		   0x2120,
+		   0x8f18,
+		   0xbfc1,
+		   0xa200,
+		   0x8814,
+		   0x2000,
+		   0x0001,
+		   0x1000,
+		   0x0000,
+		   0x0000,
+		  },
+};
+
+static const struct intel_c20pll_state xe2hpd_c20_edp_r324 = {
+	.clock = 324000,
+	.tx = { 0xbe88,
+		0x4800,
+		0x0000,
+		},
+	.cmn = { 0x0500,
+		 0x0005,
+		 0x0000,
+		 0x0000,
+		},
+	.mpllb = { 0x30a8,
+		   0x2110,
+		   0xcd9a,
+		   0xbfc1,
+		   0x6c00,
+		   0x5ab8,
+		   0x2000,
+		   0x0001,
+		   0x6000,
+		   0x0000,
+		   0x0000,
+		  },
+};
+
+static const struct intel_c20pll_state xe2hpd_c20_edp_r432 = {
+	.clock = 432000,
+	.tx = { 0xbe88,
+		0x4800,
+		0x0000,
+		},
+	.cmn = { 0x0500,
+		 0x0005,
+		 0x0000,
+		 0x0000,
+		},
+	.mpllb = { 0x30e1,
+		   0x2110,
+		   0x8e18,
+		   0xbfc1,
+		   0x9000,
+		   0x78f6,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		   0x0000,
+		  },
+};
+
+static const struct intel_c20pll_state xe2hpd_c20_edp_r675 = {
+	.clock = 675000,
+	.tx = { 0xbe88,
+		0x4800,
+		0x0000,
+		},
+	.cmn = { 0x0500,
+		 0x0005,
+		 0x0000,
+		 0x0000,
+		},
+	.mpllb = { 0x10af,
+		   0x2108,
+		   0xce1a,
+		   0xbfc1,
+		   0x7080,
+		   0x5e80,
+		   0x2000,
+		   0x0001,
+		   0x6400,
+		   0x0000,
+		   0x0000,
+		  },
+};
+
+static const struct intel_c20pll_state * const xe2hpd_c20_edp_tables[] = {
+	&mtl_c20_dp_rbr,
+	&xe2hpd_c20_edp_r216,
+	&xe2hpd_c20_edp_r243,
+	&mtl_c20_dp_hbr1,
+	&xe2hpd_c20_edp_r324,
+	&xe2hpd_c20_edp_r432,
+	&mtl_c20_dp_hbr2,
+	&xe2hpd_c20_edp_r675,
+	&mtl_c20_dp_hbr3,
+	NULL,
+};
+
 /*
  * HDMI link rates with 38.4 MHz reference clock.
  */
@@ -2062,7 +2204,10 @@ intel_c20_pll_tables_get(struct intel_crtc_state *crtc_state,
 			 struct intel_encoder *encoder)
 {
 	if (intel_crtc_has_dp_encoder(crtc_state))
-		return mtl_c20_dp_tables;
+		if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP))
+			return xe2hpd_c20_edp_tables;
+		else
+			return mtl_c20_dp_tables;
 	else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
 		return mtl_c20_hdmi_tables;