drm/i915/mtl: C20 HW readout

Create a table for C20 DP1.4, DP2.0 and HDMI2.1 rates.
The PLL settings are based on table, not for algorithmic alternative.
For DP 1.4 only MPLLB is in use.

Once register settings are done, we read back C20 HW state.

BSpec: 64568

v2: Updated pll tables (RK)
    MPLLB selection fix (RK)
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-3-mika.kahola@intel.com

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

@@ -11,6 +11,7 @@
 #include "intel_de.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
+#include "intel_hdmi.h"
 #include "intel_panel.h"
 #include "intel_psr.h"
 #include "intel_tc.h"
@@ -285,6 +286,23 @@ static void intel_c20_sram_write(struct drm_i915_private *i915, enum port port,
 	intel_cx0_write(i915, port, lane, PHY_C20_WR_DATA_L, data & 0xff, 1);
 }
 
+static u16 intel_c20_sram_read(struct drm_i915_private *i915, enum port port,
+			       int lane, u16 addr)
+{
+	u16 val;
+
+	assert_dc_off(i915);
+
+	intel_cx0_write(i915, port, lane, PHY_C20_RD_ADDRESS_H, addr >> 8, 0);
+	intel_cx0_write(i915, port, lane, PHY_C20_RD_ADDRESS_L, addr & 0xff, 1);
+
+	val = intel_cx0_read(i915, port, lane, PHY_C20_RD_DATA_H);
+	val <<= 8;
+	val |= intel_cx0_read(i915, port, lane, PHY_C20_RD_DATA_L);
+
+	return val;
+}
+
 static void __intel_cx0_rmw(struct drm_i915_private *i915, enum port port,
 			    int lane, u16 addr, u8 clear, u8 set, bool committed)
 {
@@ -659,6 +677,199 @@ static const struct intel_c10pll_state * const mtl_c10_edp_tables[] = {
 	NULL,
 };
 
+/* C20 basic DP 1.4 tables */
+static const struct intel_c20pll_state mtl_c20_dp_rbr = {
+	.link_bit_rate = 162000,
+	.clock = 162000,
+	.tx = {	0xbe88, /* tx cfg0 */
+		0x5800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x50a8,	/* mpllb cfg0 */
+		0x2120,		/* mpllb cfg1 */
+		0xcd9a,		/* mpllb cfg2 */
+		0xbfc1,		/* mpllb cfg3 */
+		0x5ab8,         /* mpllb cfg4 */
+		0x4c34,         /* mpllb cfg5 */
+		0x2000,		/* mpllb cfg6 */
+		0x0001,		/* mpllb cfg7 */
+		0x6000,		/* mpllb cfg8 */
+		0x0000,		/* mpllb cfg9 */
+		0x0000,		/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_dp_hbr1 = {
+	.link_bit_rate = 270000,
+	.clock = 270000,
+	.tx = {	0xbe88, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x308c,	/* mpllb cfg0 */
+		0x2110,		/* mpllb cfg1 */
+		0xcc9c,		/* mpllb cfg2 */
+		0xbfc1,		/* mpllb cfg3 */
+		0x4b9a,         /* mpllb cfg4 */
+		0x3f81,         /* mpllb cfg5 */
+		0x2000,		/* mpllb cfg6 */
+		0x0001,		/* mpllb cfg7 */
+		0x5000,		/* mpllb cfg8 */
+		0x0000,		/* mpllb cfg9 */
+		0x0000,		/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_dp_hbr2 = {
+	.link_bit_rate = 540000,
+	.clock = 540000,
+	.tx = {	0xbe88, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x108c,	/* mpllb cfg0 */
+		0x2108,		/* mpllb cfg1 */
+		0xcc9c,		/* mpllb cfg2 */
+		0xbfc1,		/* mpllb cfg3 */
+		0x4b9a,         /* mpllb cfg4 */
+		0x3f81,         /* mpllb cfg5 */
+		0x2000,		/* mpllb cfg6 */
+		0x0001,		/* mpllb cfg7 */
+		0x5000,		/* mpllb cfg8 */
+		0x0000,		/* mpllb cfg9 */
+		0x0000,		/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_dp_hbr3 = {
+	.link_bit_rate = 810000,
+	.clock = 810000,
+	.tx = {	0xbe88, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x10d2,	/* mpllb cfg0 */
+		0x2108,		/* mpllb cfg1 */
+		0x8d98,		/* mpllb cfg2 */
+		0xbfc1,		/* mpllb cfg3 */
+		0x7166,         /* mpllb cfg4 */
+		0x5f42,         /* mpllb cfg5 */
+		0x2000,		/* mpllb cfg6 */
+		0x0001,		/* mpllb cfg7 */
+		0x7800,		/* mpllb cfg8 */
+		0x0000,		/* mpllb cfg9 */
+		0x0000,		/* mpllb cfg10 */
+		},
+};
+
+/* C20 basic DP 2.0 tables */
+static const struct intel_c20pll_state mtl_c20_dp_uhbr10 = {
+	.link_bit_rate = 1000000, /* 10 Gbps */
+	.clock = 312500,
+	.tx = {	0xbe21, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mplla = { 0x3104,	/* mplla cfg0 */
+		0xd105,		/* mplla cfg1 */
+		0xc025,		/* mplla cfg2 */
+		0xc025,		/* mplla cfg3 */
+		0x8c00,		/* mplla cfg4 */
+		0x759a,		/* mplla cfg5 */
+		0x4000,		/* mplla cfg6 */
+		0x0003,		/* mplla cfg7 */
+		0x3555,		/* mplla cfg8 */
+		0x0001,		/* mplla cfg9 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_dp_uhbr13_5 = {
+	.link_bit_rate = 1350000, /* 13.5 Gbps */
+	.clock = 421875,
+	.tx = {	0xbea0, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x015f,	/* mpllb cfg0 */
+		0x2205,		/* mpllb cfg1 */
+		0x1b17,		/* mpllb cfg2 */
+		0xffc1,		/* mpllb cfg3 */
+		0xe100,		/* mpllb cfg4 */
+		0xbd00,		/* mpllb cfg5 */
+		0x2000,		/* mpllb cfg6 */
+		0x0001,		/* mpllb cfg7 */
+		0x4800,		/* mpllb cfg8 */
+		0x0000,		/* mpllb cfg9 */
+		0x0000,		/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_dp_uhbr20 = {
+	.link_bit_rate = 2000000, /* 20 Gbps */
+	.clock = 625000,
+	.tx = {	0xbe20, /* tx cfg0 */
+		0x4800, /* tx cfg1 */
+		0x0000, /* tx cfg2 */
+		},
+	.cmn = {0x0500, /* cmn cfg0*/
+		0x0005, /* cmn cfg1 */
+		0x0000, /* cmn cfg2 */
+		0x0000, /* cmn cfg3 */
+		},
+	.mplla = { 0x3104,	/* mplla cfg0 */
+		0xd105,		/* mplla cfg1 */
+		0xc025,		/* mplla cfg2 */
+		0xc025,		/* mplla cfg3 */
+		0xa6ab,		/* mplla cfg4 */
+		0x8c00,		/* mplla cfg5 */
+		0x4000,		/* mplla cfg6 */
+		0x0003,		/* mplla cfg7 */
+		0x3555,		/* mplla cfg8 */
+		0x0001,		/* mplla cfg9 */
+		},
+};
+
+static const struct intel_c20pll_state * const mtl_c20_dp_tables[] = {
+	&mtl_c20_dp_rbr,
+	&mtl_c20_dp_hbr1,
+	&mtl_c20_dp_hbr2,
+	&mtl_c20_dp_hbr3,
+	&mtl_c20_dp_uhbr10,
+	&mtl_c20_dp_uhbr13_5,
+	&mtl_c20_dp_uhbr20,
+	NULL,
+};
+
 /*
  * HDMI link rates with 38.4 MHz reference clock.
  */
@@ -1243,7 +1454,281 @@ static const struct intel_c10pll_state * const mtl_c10_hdmi_tables[] = {
 	NULL,
 };
 
-int intel_c10_phy_check_hdmi_link_rate(int clock)
+static const struct intel_c20pll_state mtl_c20_hdmi_25_175 = {
+	.link_bit_rate = 25175,
+	.clock = 25175,
+	.tx = {  0xbe88, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0xa0d2,	/* mpllb cfg0 */
+		   0x7d80,	/* mpllb cfg1 */
+		   0x0906,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x0200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x0000,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0001,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_27_0 = {
+	.link_bit_rate = 27000,
+	.clock = 27000,
+	.tx = {  0xbe88, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0xa0e0,	/* mpllb cfg0 */
+		   0x7d80,	/* mpllb cfg1 */
+		   0x0906,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x8000,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0001,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_74_25 = {
+	.link_bit_rate = 74250,
+	.clock = 74250,
+	.tx = {  0xbe88, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x609a,	/* mpllb cfg0 */
+		   0x7d40,	/* mpllb cfg1 */
+		   0xca06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x5800,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0001,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_148_5 = {
+	.link_bit_rate = 148500,
+	.clock = 148500,
+	.tx = {  0xbe88, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x409a,	/* mpllb cfg0 */
+		   0x7d20,	/* mpllb cfg1 */
+		   0xca06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x5800,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0001,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_594 = {
+	.link_bit_rate = 594000,
+	.clock = 594000,
+	.tx = {  0xbe88, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x009a,	/* mpllb cfg0 */
+		   0x7d08,	/* mpllb cfg1 */
+		   0xca06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x5800,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0001,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_300 = {
+	.link_bit_rate = 3000000,
+	.clock = 166670,
+	.tx = {  0xbe98, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x209c,	/* mpllb cfg0 */
+		   0x7d10,	/* mpllb cfg1 */
+		   0xca06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x2000,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0004,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_600 = {
+	.link_bit_rate = 6000000,
+	.clock = 333330,
+	.tx = {  0xbe98, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x009c,	/* mpllb cfg0 */
+		   0x7d08,	/* mpllb cfg1 */
+		   0xca06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x2000,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0004,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_800 = {
+	.link_bit_rate = 8000000,
+	.clock = 444440,
+	.tx = {  0xbe98, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x00d0,	/* mpllb cfg0 */
+		   0x7d08,	/* mpllb cfg1 */
+		   0x4a06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0003,	/* mpllb cfg7 */
+		   0x2aaa,	/* mpllb cfg8 */
+		   0x0002,	/* mpllb cfg9 */
+		   0x0004,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_1000 = {
+	.link_bit_rate = 10000000,
+	.clock = 555560,
+	.tx = {  0xbe98, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x1104,	/* mpllb cfg0 */
+		   0x7d08,	/* mpllb cfg1 */
+		   0x0a06,	/* mpllb cfg2 */
+		   0xbe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0003,	/* mpllb cfg7 */
+		   0x3555,	/* mpllb cfg8 */
+		   0x0001,	/* mpllb cfg9 */
+		   0x0004,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state mtl_c20_hdmi_1200 = {
+	.link_bit_rate = 12000000,
+	.clock = 666670,
+	.tx = {  0xbe98, /* tx cfg0 */
+		  0x9800, /* tx cfg1 */
+		  0x0000, /* tx cfg2 */
+		},
+	.cmn = { 0x0500, /* cmn cfg0*/
+		  0x0005, /* cmn cfg1 */
+		  0x0000, /* cmn cfg2 */
+		  0x0000, /* cmn cfg3 */
+		},
+	.mpllb = { 0x0138,	/* mpllb cfg0 */
+		   0x7d08,	/* mpllb cfg1 */
+		   0x5486,	/* mpllb cfg2 */
+		   0xfe40,	/* mpllb cfg3 */
+		   0x0000,	/* mpllb cfg4 */
+		   0x0000,	/* mpllb cfg5 */
+		   0x2200,	/* mpllb cfg6 */
+		   0x0001,	/* mpllb cfg7 */
+		   0x4000,	/* mpllb cfg8 */
+		   0x0000,	/* mpllb cfg9 */
+		   0x0004,	/* mpllb cfg10 */
+		},
+};
+
+static const struct intel_c20pll_state * const mtl_c20_hdmi_tables[] = {
+	&mtl_c20_hdmi_25_175,
+	&mtl_c20_hdmi_27_0,
+	&mtl_c20_hdmi_74_25,
+	&mtl_c20_hdmi_148_5,
+	&mtl_c20_hdmi_594,
+	&mtl_c20_hdmi_300,
+	&mtl_c20_hdmi_600,
+	&mtl_c20_hdmi_800,
+	&mtl_c20_hdmi_1000,
+	&mtl_c20_hdmi_1200,
+	NULL,
+};
+
+static int intel_c10_phy_check_hdmi_link_rate(int clock)
 {
 	const struct intel_c10pll_state * const *tables = mtl_c10_hdmi_tables;
 	int i;
@@ -1319,17 +1804,6 @@ static int intel_c10pll_calc_state(struct intel_crtc_state *crtc_state,
 	return -EINVAL;
 }
 
-int intel_cx0pll_calc_state(struct intel_crtc_state *crtc_state,
-			    struct intel_encoder *encoder)
-{
-	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
-	enum phy phy = intel_port_to_phy(i915, encoder->port);
-
-	drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
-
-	return intel_c10pll_calc_state(crtc_state, encoder);
-}
-
 void intel_c10pll_readout_hw_state(struct intel_encoder *encoder,
 				   struct intel_c10pll_state *pll_state)
 {
@@ -1427,6 +1901,74 @@ void intel_c10pll_dump_hw_state(struct drm_i915_private *i915,
 			    i + 2, hw_state->pll[i + 2], i + 3, hw_state->pll[i + 3]);
 }
 
+static int intel_c20_phy_check_hdmi_link_rate(int clock)
+{
+	const struct intel_c20pll_state * const *tables = mtl_c20_hdmi_tables;
+	int i;
+
+	for (i = 0; tables[i]; i++) {
+		if (clock == tables[i]->link_bit_rate)
+			return MODE_OK;
+	}
+
+	return MODE_CLOCK_RANGE;
+}
+
+int intel_cx0_phy_check_hdmi_link_rate(struct intel_hdmi *hdmi, int clock)
+{
+	struct intel_digital_port *dig_port = hdmi_to_dig_port(hdmi);
+	struct drm_i915_private *i915 = intel_hdmi_to_i915(hdmi);
+	enum phy phy = intel_port_to_phy(i915, dig_port->base.port);
+
+	if (intel_is_c10phy(i915, phy))
+		return intel_c10_phy_check_hdmi_link_rate(clock);
+	return intel_c20_phy_check_hdmi_link_rate(clock);
+}
+
+static const struct intel_c20pll_state * const *
+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;
+	else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+		return mtl_c20_hdmi_tables;
+
+	MISSING_CASE(encoder->type);
+	return NULL;
+}
+
+static int intel_c20pll_calc_state(struct intel_crtc_state *crtc_state,
+				   struct intel_encoder *encoder)
+{
+	const struct intel_c20pll_state * const *tables;
+	int i;
+
+	tables = intel_c20_pll_tables_get(crtc_state, encoder);
+	if (!tables)
+		return -EINVAL;
+
+	for (i = 0; tables[i]; i++) {
+		if (crtc_state->port_clock == tables[i]->link_bit_rate) {
+			crtc_state->cx0pll_state.c20 = *tables[i];
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+int intel_cx0pll_calc_state(struct intel_crtc_state *crtc_state,
+			    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 (intel_is_c10phy(i915, phy))
+		return intel_c10pll_calc_state(crtc_state, encoder);
+	return intel_c20pll_calc_state(crtc_state, encoder);
+}
+
 static bool intel_c20_use_mplla(u32 clock)
 {
 	/* 10G and 20G rates use MPLLA */
@@ -1436,6 +1978,64 @@ static bool intel_c20_use_mplla(u32 clock)
 	return false;
 }
 
+void intel_c20pll_readout_hw_state(struct intel_encoder *encoder,
+				   struct intel_c20pll_state *pll_state)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	bool cntx;
+	intel_wakeref_t wakeref;
+	int i;
+
+	wakeref = intel_cx0_phy_transaction_begin(encoder);
+
+	/* 1. Read current context selection */
+	cntx = intel_cx0_read(i915, encoder->port, INTEL_CX0_LANE0, PHY_C20_VDR_CUSTOM_SERDES_RATE) & PHY_C20_CONTEXT_TOGGLE;
+
+	/* Read Tx configuration */
+	for (i = 0; i < ARRAY_SIZE(pll_state->tx); i++) {
+		if (cntx)
+			pll_state->tx[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+							       PHY_C20_B_TX_CNTX_CFG(i));
+		else
+			pll_state->tx[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+							       PHY_C20_A_TX_CNTX_CFG(i));
+	}
+
+	/* Read common configuration */
+	for (i = 0; i < ARRAY_SIZE(pll_state->cmn); i++) {
+		if (cntx)
+			pll_state->cmn[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+								PHY_C20_B_CMN_CNTX_CFG(i));
+		else
+			pll_state->cmn[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+								PHY_C20_A_CMN_CNTX_CFG(i));
+	}
+
+	if (pll_state->tx[0] & C20_PHY_USE_MPLLB) {
+		/* MPLLB configuration */
+		for (i = 0; i < ARRAY_SIZE(pll_state->mpllb); i++) {
+			if (cntx)
+				pll_state->mpllb[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+									  PHY_C20_B_MPLLB_CNTX_CFG(i));
+			else
+				pll_state->mpllb[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+									  PHY_C20_A_MPLLB_CNTX_CFG(i));
+		}
+	} else {
+		/* MPLLA configuration */
+		for (i = 0; i < ARRAY_SIZE(pll_state->mplla); i++) {
+			if (cntx)
+				pll_state->mplla[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+									  PHY_C20_B_MPLLA_CNTX_CFG(i));
+			else
+				pll_state->mplla[i] = intel_c20_sram_read(i915, encoder->port, INTEL_CX0_LANE0,
+									  PHY_C20_A_MPLLA_CNTX_CFG(i));
+		}
+	}
+
+	intel_cx0_phy_transaction_end(encoder, wakeref);
+}
+
 static u8 intel_c20_get_dp_rate(u32 clock)
 {
 	switch (clock) {

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

@@ -30,8 +30,12 @@ int intel_c10pll_calc_port_clock(struct intel_encoder *encoder,
 				 const struct intel_c10pll_state *pll_state);
 void intel_c10pll_state_verify(struct intel_atomic_state *state,
 			       struct intel_crtc_state *new_crtc_state);
+void intel_c20pll_readout_hw_state(struct intel_encoder *encoder,
+				   struct intel_c20pll_state *pll_state);
 void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder,
 				     const struct intel_crtc_state *crtc_state);
-int intel_c10_phy_check_hdmi_link_rate(int clock);
-
+int intel_cx0_phy_check_hdmi_link_rate(struct intel_hdmi *hdmi, int clock);
+void intel_cx0_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
+				       const struct intel_crtc_state *crtc_state,
+				       u32 level);
 #endif /* __INTEL_CX0_PHY_H__ */

drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h

@@ -207,6 +207,7 @@
 #define   C20_MPLLB_TX_CLK_DIV_MASK	REG_GENMASK(15, 13)
 #define   C20_MPLLB_FRACEN		REG_BIT(13)
 #define   C20_MULTIPLIER_MASK		REG_GENMASK(11, 0)
+#define   C20_PHY_USE_MPLLB		REG_BIT(7)
 
 #define RAWLANEAONX_DIG_TX_MPLLB_CAL_DONE_BANK(idx) (0x303D + (idx))
 

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

@@ -3853,10 +3853,13 @@ static void mtl_ddi_get_config(struct intel_encoder *encoder,
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 	enum phy phy = intel_port_to_phy(i915, encoder->port);
 
-	drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
-
+	if (intel_is_c10phy(i915, phy)) {
 		intel_c10pll_readout_hw_state(encoder, &crtc_state->cx0pll_state.c10);
 		intel_c10pll_dump_hw_state(i915, &crtc_state->cx0pll_state.c10);
+	} else {
+		intel_c20pll_readout_hw_state(encoder, &crtc_state->cx0pll_state.c20);
+	}
+
 	crtc_state->port_clock = intel_c10pll_calc_port_clock(encoder, &crtc_state->cx0pll_state.c10);
 
 	intel_ddi_get_config(encoder, crtc_state);

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

@@ -997,6 +997,7 @@ struct intel_c10pll_state {
 };
 
 struct intel_c20pll_state {
+	u32 link_bit_rate;
 	u32 clock; /* in kHz */
 	u16 tx[3];
 	u16 cmn[4];

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

@@ -58,7 +58,7 @@
 #include "intel_panel.h"
 #include "intel_snps_phy.h"
 
-static struct drm_i915_private *intel_hdmi_to_i915(struct intel_hdmi *intel_hdmi)
+inline struct drm_i915_private *intel_hdmi_to_i915(struct intel_hdmi *intel_hdmi)
 {
 	return to_i915(hdmi_to_dig_port(intel_hdmi)->base.base.dev);
 }
@@ -1865,8 +1865,8 @@ hdmi_port_clock_valid(struct intel_hdmi *hdmi,
 	 * FIXME: We will hopefully get an algorithmic way of programming
 	 * the MPLLB for HDMI in the future.
 	 */
-	if (IS_METEORLAKE(dev_priv))
-		return intel_c10_phy_check_hdmi_link_rate(clock);
+	if (DISPLAY_VER(dev_priv) >= 14)
+		return intel_cx0_phy_check_hdmi_link_rate(hdmi, clock);
 	else if (IS_DG2(dev_priv))
 		return intel_snps_phy_check_hdmi_link_rate(clock);
 

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

@@ -54,5 +54,6 @@ int intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
 				  int src_max_slices, int src_max_slice_width,
 				  int hdmi_max_slices, int hdmi_throughput);
 int intel_hdmi_dsc_get_slice_height(int vactive);
+struct drm_i915_private *intel_hdmi_to_i915(struct intel_hdmi *intel_hdmi);
 
 #endif /* __INTEL_HDMI_H__ */