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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2018 Intel Corporation4 */5 6#include "i915_reg.h"7#include "intel_combo_phy.h"8#include "intel_combo_phy_regs.h"9#include "intel_de.h"10#include "intel_display_types.h"11 12#define for_each_combo_phy(__dev_priv, __phy) \13	for ((__phy) = PHY_A; (__phy) < I915_MAX_PHYS; (__phy)++)	\14		for_each_if(intel_phy_is_combo(__dev_priv, __phy))15 16#define for_each_combo_phy_reverse(__dev_priv, __phy) \17	for ((__phy) = I915_MAX_PHYS; (__phy)-- > PHY_A;) \18		for_each_if(intel_phy_is_combo(__dev_priv, __phy))19 20enum {21	PROCMON_0_85V_DOT_0,22	PROCMON_0_95V_DOT_0,23	PROCMON_0_95V_DOT_1,24	PROCMON_1_05V_DOT_0,25	PROCMON_1_05V_DOT_1,26};27 28static const struct icl_procmon {29	const char *name;30	u32 dw1, dw9, dw10;31} icl_procmon_values[] = {32	[PROCMON_0_85V_DOT_0] = {33		.name = "0.85V dot0 (low-voltage)",34		.dw1 = 0x00000000, .dw9 = 0x62AB67BB, .dw10 = 0x51914F96,35	},36	[PROCMON_0_95V_DOT_0] = {37		.name = "0.95V dot0",38		.dw1 = 0x00000000, .dw9 = 0x86E172C7, .dw10 = 0x77CA5EAB,39	},40	[PROCMON_0_95V_DOT_1] = {41		.name = "0.95V dot1",42		.dw1 = 0x00000000, .dw9 = 0x93F87FE1, .dw10 = 0x8AE871C5,43	},44	[PROCMON_1_05V_DOT_0] = {45		.name = "1.05V dot0",46		.dw1 = 0x00000000, .dw9 = 0x98FA82DD, .dw10 = 0x89E46DC1,47	},48	[PROCMON_1_05V_DOT_1] = {49		.name = "1.05V dot1",50		.dw1 = 0x00440000, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1,51	},52};53 54static const struct icl_procmon *55icl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum phy phy)56{57	u32 val;58 59	val = intel_de_read(dev_priv, ICL_PORT_COMP_DW3(phy));60	switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {61	default:62		MISSING_CASE(val);63		fallthrough;64	case VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0:65		return &icl_procmon_values[PROCMON_0_85V_DOT_0];66	case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_0:67		return &icl_procmon_values[PROCMON_0_95V_DOT_0];68	case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_1:69		return &icl_procmon_values[PROCMON_0_95V_DOT_1];70	case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_0:71		return &icl_procmon_values[PROCMON_1_05V_DOT_0];72	case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_1:73		return &icl_procmon_values[PROCMON_1_05V_DOT_1];74	}75}76 77static void icl_set_procmon_ref_values(struct drm_i915_private *dev_priv,78				       enum phy phy)79{80	const struct icl_procmon *procmon;81 82	procmon = icl_get_procmon_ref_values(dev_priv, phy);83 84	intel_de_rmw(dev_priv, ICL_PORT_COMP_DW1(phy),85		     (0xff << 16) | 0xff, procmon->dw1);86 87	intel_de_write(dev_priv, ICL_PORT_COMP_DW9(phy), procmon->dw9);88	intel_de_write(dev_priv, ICL_PORT_COMP_DW10(phy), procmon->dw10);89}90 91static bool check_phy_reg(struct drm_i915_private *dev_priv,92			  enum phy phy, i915_reg_t reg, u32 mask,93			  u32 expected_val)94{95	u32 val = intel_de_read(dev_priv, reg);96 97	if ((val & mask) != expected_val) {98		drm_dbg(&dev_priv->drm,99			"Combo PHY %c reg %08x state mismatch: "100			"current %08x mask %08x expected %08x\n",101			phy_name(phy),102			reg.reg, val, mask, expected_val);103		return false;104	}105 106	return true;107}108 109static bool icl_verify_procmon_ref_values(struct drm_i915_private *dev_priv,110					  enum phy phy)111{112	const struct icl_procmon *procmon;113	bool ret;114 115	procmon = icl_get_procmon_ref_values(dev_priv, phy);116 117	ret = check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW1(phy),118			    (0xff << 16) | 0xff, procmon->dw1);119	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW9(phy),120			     -1U, procmon->dw9);121	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW10(phy),122			     -1U, procmon->dw10);123 124	return ret;125}126 127static bool has_phy_misc(struct drm_i915_private *i915, enum phy phy)128{129	/*130	 * Some platforms only expect PHY_MISC to be programmed for PHY-A and131	 * PHY-B and may not even have instances of the register for the132	 * other combo PHY's.133	 *134	 * ADL-S technically has three instances of PHY_MISC, but only requires135	 * that we program it for PHY A.136	 */137 138	if (IS_ALDERLAKE_S(i915))139		return phy == PHY_A;140	else if ((IS_JASPERLAKE(i915) || IS_ELKHARTLAKE(i915)) ||141		 IS_ROCKETLAKE(i915) ||142		 IS_DG1(i915))143		return phy < PHY_C;144 145	return true;146}147 148static bool icl_combo_phy_enabled(struct drm_i915_private *dev_priv,149				  enum phy phy)150{151	/* The PHY C added by EHL has no PHY_MISC register */152	if (!has_phy_misc(dev_priv, phy))153		return intel_de_read(dev_priv, ICL_PORT_COMP_DW0(phy)) & COMP_INIT;154	else155		return !(intel_de_read(dev_priv, ICL_PHY_MISC(phy)) &156			 ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN) &&157			(intel_de_read(dev_priv, ICL_PORT_COMP_DW0(phy)) & COMP_INIT);158}159 160static bool ehl_vbt_ddi_d_present(struct drm_i915_private *i915)161{162	struct intel_display *display = &i915->display;163 164	bool ddi_a_present = intel_bios_is_port_present(display, PORT_A);165	bool ddi_d_present = intel_bios_is_port_present(display, PORT_D);166	bool dsi_present = intel_bios_is_dsi_present(display, NULL);167 168	/*169	 * VBT's 'dvo port' field for child devices references the DDI, not170	 * the PHY.  So if combo PHY A is wired up to drive an external171	 * display, we should see a child device present on PORT_D and172	 * nothing on PORT_A and no DSI.173	 */174	if (ddi_d_present && !ddi_a_present && !dsi_present)175		return true;176 177	/*178	 * If we encounter a VBT that claims to have an external display on179	 * DDI-D _and_ an internal display on DDI-A/DSI leave an error message180	 * in the log and let the internal display win.181	 */182	if (ddi_d_present)183		drm_err(&i915->drm,184			"VBT claims to have both internal and external displays on PHY A.  Configuring for internal.\n");185 186	return false;187}188 189static bool phy_is_master(struct drm_i915_private *dev_priv, enum phy phy)190{191	/*192	 * Certain PHYs are connected to compensation resistors and act193	 * as masters to other PHYs.194	 *195	 * ICL,TGL:196	 *   A(master) -> B(slave), C(slave)197	 * RKL,DG1:198	 *   A(master) -> B(slave)199	 *   C(master) -> D(slave)200	 * ADL-S:201	 *   A(master) -> B(slave), C(slave)202	 *   D(master) -> E(slave)203	 *204	 * We must set the IREFGEN bit for any PHY acting as a master205	 * to another PHY.206	 */207	if (phy == PHY_A)208		return true;209	else if (IS_ALDERLAKE_S(dev_priv))210		return phy == PHY_D;211	else if (IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv))212		return phy == PHY_C;213 214	return false;215}216 217static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,218				       enum phy phy)219{220	bool ret = true;221	u32 expected_val = 0;222 223	if (!icl_combo_phy_enabled(dev_priv, phy))224		return false;225 226	if (DISPLAY_VER(dev_priv) >= 12) {227		ret &= check_phy_reg(dev_priv, phy, ICL_PORT_TX_DW8_LN(0, phy),228				     ICL_PORT_TX_DW8_ODCC_CLK_SEL |229				     ICL_PORT_TX_DW8_ODCC_CLK_DIV_SEL_MASK,230				     ICL_PORT_TX_DW8_ODCC_CLK_SEL |231				     ICL_PORT_TX_DW8_ODCC_CLK_DIV_SEL_DIV2);232 233		ret &= check_phy_reg(dev_priv, phy, ICL_PORT_PCS_DW1_LN(0, phy),234				     DCC_MODE_SELECT_MASK, RUN_DCC_ONCE);235	}236 237	ret &= icl_verify_procmon_ref_values(dev_priv, phy);238 239	if (phy_is_master(dev_priv, phy)) {240		ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW8(phy),241				     IREFGEN, IREFGEN);242 243		if (IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv)) {244			if (ehl_vbt_ddi_d_present(dev_priv))245				expected_val = ICL_PHY_MISC_MUX_DDID;246 247			ret &= check_phy_reg(dev_priv, phy, ICL_PHY_MISC(phy),248					     ICL_PHY_MISC_MUX_DDID,249					     expected_val);250		}251	}252 253	ret &= check_phy_reg(dev_priv, phy, ICL_PORT_CL_DW5(phy),254			     CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);255 256	return ret;257}258 259void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,260				    enum phy phy, bool is_dsi,261				    int lane_count, bool lane_reversal)262{263	u8 lane_mask;264 265	if (is_dsi) {266		drm_WARN_ON(&dev_priv->drm, lane_reversal);267 268		switch (lane_count) {269		case 1:270			lane_mask = PWR_DOWN_LN_3_1_0;271			break;272		case 2:273			lane_mask = PWR_DOWN_LN_3_1;274			break;275		case 3:276			lane_mask = PWR_DOWN_LN_3;277			break;278		default:279			MISSING_CASE(lane_count);280			fallthrough;281		case 4:282			lane_mask = PWR_UP_ALL_LANES;283			break;284		}285	} else {286		switch (lane_count) {287		case 1:288			lane_mask = lane_reversal ? PWR_DOWN_LN_2_1_0 :289						    PWR_DOWN_LN_3_2_1;290			break;291		case 2:292			lane_mask = lane_reversal ? PWR_DOWN_LN_1_0 :293						    PWR_DOWN_LN_3_2;294			break;295		default:296			MISSING_CASE(lane_count);297			fallthrough;298		case 4:299			lane_mask = PWR_UP_ALL_LANES;300			break;301		}302	}303 304	intel_de_rmw(dev_priv, ICL_PORT_CL_DW10(phy),305		     PWR_DOWN_LN_MASK, lane_mask);306}307 308static void icl_combo_phys_init(struct drm_i915_private *dev_priv)309{310	enum phy phy;311 312	for_each_combo_phy(dev_priv, phy) {313		const struct icl_procmon *procmon;314		u32 val;315 316		if (icl_combo_phy_verify_state(dev_priv, phy))317			continue;318 319		procmon = icl_get_procmon_ref_values(dev_priv, phy);320 321		drm_dbg(&dev_priv->drm,322			"Initializing combo PHY %c (Voltage/Process Info : %s)\n",323			phy_name(phy), procmon->name);324 325		if (!has_phy_misc(dev_priv, phy))326			goto skip_phy_misc;327 328		/*329		 * EHL's combo PHY A can be hooked up to either an external330		 * display (via DDI-D) or an internal display (via DDI-A or331		 * the DSI DPHY).  This is a motherboard design decision that332		 * can't be changed on the fly, so initialize the PHY's mux333		 * based on whether our VBT indicates the presence of any334		 * "internal" child devices.335		 */336		val = intel_de_read(dev_priv, ICL_PHY_MISC(phy));337		if ((IS_JASPERLAKE(dev_priv) || IS_ELKHARTLAKE(dev_priv)) &&338		    phy == PHY_A) {339			val &= ~ICL_PHY_MISC_MUX_DDID;340 341			if (ehl_vbt_ddi_d_present(dev_priv))342				val |= ICL_PHY_MISC_MUX_DDID;343		}344 345		val &= ~ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;346		intel_de_write(dev_priv, ICL_PHY_MISC(phy), val);347 348skip_phy_misc:349		if (DISPLAY_VER(dev_priv) >= 12) {350			val = intel_de_read(dev_priv, ICL_PORT_TX_DW8_LN(0, phy));351			val &= ~ICL_PORT_TX_DW8_ODCC_CLK_DIV_SEL_MASK;352			val |= ICL_PORT_TX_DW8_ODCC_CLK_SEL;353			val |= ICL_PORT_TX_DW8_ODCC_CLK_DIV_SEL_DIV2;354			intel_de_write(dev_priv, ICL_PORT_TX_DW8_GRP(phy), val);355 356			val = intel_de_read(dev_priv, ICL_PORT_PCS_DW1_LN(0, phy));357			val &= ~DCC_MODE_SELECT_MASK;358			val |= RUN_DCC_ONCE;359			intel_de_write(dev_priv, ICL_PORT_PCS_DW1_GRP(phy), val);360		}361 362		icl_set_procmon_ref_values(dev_priv, phy);363 364		if (phy_is_master(dev_priv, phy))365			intel_de_rmw(dev_priv, ICL_PORT_COMP_DW8(phy),366				     0, IREFGEN);367 368		intel_de_rmw(dev_priv, ICL_PORT_COMP_DW0(phy), 0, COMP_INIT);369		intel_de_rmw(dev_priv, ICL_PORT_CL_DW5(phy),370			     0, CL_POWER_DOWN_ENABLE);371	}372}373 374static void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)375{376	enum phy phy;377 378	for_each_combo_phy_reverse(dev_priv, phy) {379		if (phy == PHY_A &&380		    !icl_combo_phy_verify_state(dev_priv, phy)) {381			if (IS_TIGERLAKE(dev_priv) || IS_DG1(dev_priv)) {382				/*383				 * A known problem with old ifwi:384				 * https://gitlab.freedesktop.org/drm/intel/-/issues/2411385				 * Suppress the warning for CI. Remove ASAP!386				 */387				drm_dbg_kms(&dev_priv->drm,388					    "Combo PHY %c HW state changed unexpectedly\n",389					    phy_name(phy));390			} else {391				drm_warn(&dev_priv->drm,392					 "Combo PHY %c HW state changed unexpectedly\n",393					 phy_name(phy));394			}395		}396 397		if (!has_phy_misc(dev_priv, phy))398			goto skip_phy_misc;399 400		intel_de_rmw(dev_priv, ICL_PHY_MISC(phy), 0,401			     ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN);402 403skip_phy_misc:404		intel_de_rmw(dev_priv, ICL_PORT_COMP_DW0(phy), COMP_INIT, 0);405	}406}407 408void intel_combo_phy_init(struct drm_i915_private *i915)409{410	icl_combo_phys_init(i915);411}412 413void intel_combo_phy_uninit(struct drm_i915_private *i915)414{415	icl_combo_phys_uninit(i915);416}417