[Intel-gfx] [PATCH 42/53] drm/i915/dg2: Add MPLLB programming for SNPS PHY

Matt Roper
2021-07-01T20:26:16Z

DG2's SNPS PHYs incorporate a dedicated port PLL called MPLLB which
takes the place of the shared DPLLs we've used on past platforms. Let's
add the MPLLB programming sequences; they'll be plugged into the rest of
the code in future patches.

Bspec: 54032
Bspec: 53881
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Nidhi Gupta <nidhi1.gupta@intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 1 +
.../drm/i915/display/intel_display_types.h | 17 +-
drivers/gpu/drm/i915/display/intel_dpll.c | 12 +-
drivers/gpu/drm/i915/display/intel_snps_phy.c | 517 ++++++++++++++++++
drivers/gpu/drm/i915/display/intel_snps_phy.h | 18 +
drivers/gpu/drm/i915/i915_reg.h | 56 ++
7 files changed, 616 insertions(+), 6 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_snps_phy.c
create mode 100644 drivers/gpu/drm/i915/display/intel_snps_phy.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 01f28ad5ea57..6b6c1e5a72d5 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -268,6 +268,7 @@ i915-y += \
display/intel_pps.o \
display/intel_qp_tables.o \
display/intel_sdvo.o \
+ display/intel_snps_phy.o \
display/intel_tv.o \
display/intel_vdsc.o \
display/intel_vrr.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index dc2b943a4e72..91f6964ec406 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -59,6 +59,7 @@
#include "display/intel_hdmi.h"
#include "display/intel_lvds.h"
#include "display/intel_sdvo.h"
+#include "display/intel_snps_phy.h"
#include "display/intel_tv.h"
#include "display/intel_vdsc.h"
#include "display/intel_vrr.h"
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index d94f361b548b..29ae1d9b5abc 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -884,6 +884,18 @@ enum intel_output_format {
INTEL_OUTPUT_FORMAT_YCBCR444,
};

+struct intel_mpllb_state {
+ u32 clock; /* in KHz */
+ u32 ref_control;
+ u32 mpllb_cp;
+ u32 mpllb_div;
+ u32 mpllb_div2;
+ u32 mpllb_fracn1;
+ u32 mpllb_fracn2;
+ u32 mpllb_sscen;
+ u32 mpllb_sscstep;
+};
+
struct intel_crtc_state {
/*
* uapi (drm) state. This is the software state shown to userspace.
@@ -1018,7 +1030,10 @@ struct intel_crtc_state {
struct intel_shared_dpll *shared_dpll;

/* Actual register state of the dpll, for shared dpll cross-checking. */
- struct intel_dpll_hw_state dpll_hw_state;
+ union {
+ struct intel_dpll_hw_state dpll_hw_state;
+ struct intel_mpllb_state mpllb_state;
+ };

/*
* ICL reserved DPLLs for the CRTC/port. The active PLL is selected by
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c b/drivers/gpu/drm/i915/display/intel_dpll.c
index 89635da9f6f6..14515e62c05e 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll.c
@@ -11,6 +11,7 @@
#include "intel_lvds.h"
#include "intel_panel.h"
#include "intel_sideband.h"
+#include "display/intel_snps_phy.h"

struct intel_limit {
struct {
@@ -923,12 +924,13 @@ static int hsw_crtc_compute_clock(struct intel_crtc *crtc,
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_atomic_state *state =
to_intel_atomic_state(crtc_state->uapi.state);
+ struct intel_encoder *encoder =
+ intel_get_crtc_new_encoder(state, crtc_state);

- if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
- DISPLAY_VER(dev_priv) >= 11) {
- struct intel_encoder *encoder =
- intel_get_crtc_new_encoder(state, crtc_state);
-
+ if (IS_DG2(dev_priv)) {
+ return intel_mpllb_calc_state(crtc_state, encoder);
+ } else if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
+ DISPLAY_VER(dev_priv) >= 11) {
if (!intel_reserve_shared_dplls(state, crtc, encoder)) {
drm_dbg_kms(&dev_priv->drm,
"failed to find PLL for pipe %c\n",
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c
new file mode 100644
index 000000000000..6d9205906595
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c
@@ -0,0 +1,517 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_snps_phy.h"
+
+/**
+ * DOC: Synopsis PHY support
+ *
+ * Synopsis PHYs are primarily programmed by looking up magic register values
+ * in tables rather than calculating the necessary values at runtime.
+ *
+ * Of special note is that the SNPS PHYs include a dedicated port PLL, known as
+ * an "MPLLB." The MPLLB replaces the shared DPLL functionality used on other
+ * platforms and must be programming directly during the modeset sequence
+ * since it is not handled by the shared DPLL framework as on other platforms.
+ */
+
+/*
+ * Basic DP link rates with 100 MHz reference clock.
+ */
+
+static const struct intel_mpllb_state dg2_dp_rbr_100 = {
+ .clock = 162000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 20) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 226),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 5),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 39321) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 3),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr1_100 = {
+ .clock = 270000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 20) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 3),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 184),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr2_100 = {
+ .clock = 540000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 20) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 3),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 184),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr3_100 = {
+ .clock = 810000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 19) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 292),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+};
+
+static const struct intel_mpllb_state *dg2_dp_100_tables[] = {
+ &dg2_dp_rbr_100,
+ &dg2_dp_hbr1_100,
+ &dg2_dp_hbr2_100,
+ &dg2_dp_hbr3_100,
+ NULL,
+};
+
+/*
+ * Basic DP link rates with 38.4 MHz reference clock.
+ */
+
+static const struct intel_mpllb_state dg2_dp_rbr_38_4 = {
+ .clock = 162000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 1),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 5) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 25) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 304),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 49152),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr1_38_4 = {
+ .clock = 270000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 1),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 5) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 25) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 3),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 248),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 40960),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr2_38_4 = {
+ .clock = 540000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 1),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 5) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 25) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 3),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 248),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 40960),
+};
+
+static const struct intel_mpllb_state dg2_dp_hbr3_38_4 = {
+ .clock = 810000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 1),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 6) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 26) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 388),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 1),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 61440),
+};
+
+static const struct intel_mpllb_state *dg2_dp_38_4_tables[] = {
+ &dg2_dp_rbr_38_4,
+ &dg2_dp_hbr1_38_4,
+ &dg2_dp_hbr2_38_4,
+ &dg2_dp_hbr3_38_4,
+ NULL,
+};
+
+/*
+ * eDP link rates with 100 MHz reference clock.
+ */
+
+static const struct intel_mpllb_state dg2_edp_r216 = {
+ .clock = 216000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 19) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 312),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 5),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 52428) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 4),
+ .mpllb_sscen =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_PEAK, 50961),
+ .mpllb_sscstep =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_STEPSIZE, 65752),
+};
+
+static const struct intel_mpllb_state dg2_edp_r243 = {
+ .clock = 243000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 20) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 356),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 5),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 26214) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 2),
+ .mpllb_sscen =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_PEAK, 57331),
+ .mpllb_sscstep =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_STEPSIZE, 73971),
+};
+
+static const struct intel_mpllb_state dg2_edp_r324 = {
+ .clock = 324000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 20) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FREQ_VCO, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 226),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 5),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 39321) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 3),
+ .mpllb_sscen =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_PEAK, 38221),
+ .mpllb_sscstep =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_STEPSIZE, 49314),
+};
+
+static const struct intel_mpllb_state dg2_edp_r432 = {
+ .clock = 432000,
+ .ref_control =
+ REG_FIELD_PREP(SNPS_PHY_REF_CONTROL_REF_RANGE, 3),
+ .mpllb_cp =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT, 4) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP, 19) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_INT_GS, 65) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_CP_PROP_GS, 127),
+ .mpllb_div =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_DIV5_CLK_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_TX_CLK_DIV, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_PMIX_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_V2I, 2),
+ .mpllb_div2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_REF_CLK_DIV, 2) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_MULTIPLIER, 312),
+ .mpllb_fracn1 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_DEN, 5),
+ .mpllb_fracn2 =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_QUOT, 52428) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_FRACN_REM, 4),
+ .mpllb_sscen =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_EN, 1) |
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_PEAK, 50961),
+ .mpllb_sscstep =
+ REG_FIELD_PREP(SNPS_PHY_MPLLB_SSC_STEPSIZE, 65752),
+};
+
+static const struct intel_mpllb_state *dg2_edp_tables[] = {
+ &dg2_dp_rbr_100,
+ &dg2_edp_r216,
+ &dg2_edp_r243,
+ &dg2_dp_hbr1_100,
+ &dg2_edp_r324,
+ &dg2_edp_r432,
+ &dg2_dp_hbr2_100,
+ &dg2_dp_hbr3_100,
+ NULL,
+};
+
+int intel_mpllb_calc_state(struct intel_crtc_state *crtc_state,
+ struct intel_encoder *encoder)
+{
+ const struct intel_mpllb_state **tables;
+ int i;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP)) {
+ tables = dg2_edp_tables;
+ } else if (intel_crtc_has_dp_encoder(crtc_state)) {
+ /*
+ * FIXME: Initially we're just enabling the "combo" outputs on
+ * port A-D. The MPLLB for those ports takes an input from the
+ * "Display Filter PLL" which always has an output frequency
+ * of 100 MHz, hence the use of the _100 tables below.
+ *
+ * Once we enable port TC1 it will either use the same 100 MHz
+ * "Display Filter PLL" (when strapped to support a native
+ * display connection) or different 38.4 MHz "Filter PLL" when
+ * strapped to support a USB connection, so we'll need to check
+ * that to determine which table to use.
+ */
+ if (0)
+ tables = dg2_dp_38_4_tables;
+ else
+ tables = dg2_dp_100_tables;
+ } else {
+ /* TODO: Add HDMI support */
+ MISSING_CASE(encoder->type);
+ return -EINVAL;
+ }
+
+ for (i = 0; tables[i]; i++) {
+ if (crtc_state->port_clock <= tables[i]->clock) {
+ crtc_state->mpllb_state = *tables[i];
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+void intel_mpllb_enable(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ const struct intel_mpllb_state *pll_state = &crtc_state->mpllb_state;
+ enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+ i915_reg_t enable_reg = (phy <= PHY_D ?
+ DG2_PLL_ENABLE(phy) : MG_PLL_ENABLE(0));
+
+ /*
+ * 3. Software programs the following PLL registers for the desired
+ * frequency.
+ */
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_CP(phy), pll_state->mpllb_cp);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_DIV(phy), pll_state->mpllb_div);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_DIV2(phy), pll_state->mpllb_div2);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_SSCEN(phy), pll_state->mpllb_sscen);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_SSCSTEP(phy), pll_state->mpllb_sscstep);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_FRACN1(phy), pll_state->mpllb_fracn1);
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_FRACN2(phy), pll_state->mpllb_fracn2);
+
+ /*
+ * 4. If the frequency will result in a change to the voltage
+ * requirement, follow the Display Voltage Frequency Switching -
+ * Sequence Before Frequency Change.
+ *
+ * We handle this step in bxt_set_cdclk().
+ */
+
+ /* 5. Software sets DPLL_ENABLE [PLL Enable] to "1". */
+ intel_uncore_rmw(&dev_priv->uncore, enable_reg, 0, PLL_ENABLE);
+
+ /*
+ * 9. Software sets SNPS_PHY_MPLLB_DIV dp_mpllb_force_en to "1". This
+ * will keep the PLL running during the DDI lane programming and any
+ * typeC DP cable disconnect. Do not set the force before enabling the
+ * PLL because that will start the PLL before it has sampled the
+ * divider values.
+ */
+ intel_de_write(dev_priv, SNPS_PHY_MPLLB_DIV(phy),
+ pll_state->mpllb_div | SNPS_PHY_MPLLB_FORCE_EN);
+
+ /*
+ * 10. Software polls on register DPLL_ENABLE [PLL Lock] to confirm PLL
+ * is locked at new settings. This register bit is sampling PHY
+ * dp_mpllb_state interface signal.
+ */
+ if (intel_de_wait_for_set(dev_priv, enable_reg, PLL_LOCK, 5))
+ DRM_ERROR("Port %c PLL not locked\n", phy_name(phy));
+
+ /*
+ * 11. If the frequency will result in a change to the voltage
+ * requirement, follow the Display Voltage Frequency Switching -
+ * Sequence After Frequency Change.
+ *
+ * We handle this step in bxt_set_cdclk().
+ */
+}
+
+void intel_mpllb_disable(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+ i915_reg_t enable_reg = (phy <= PHY_D ?
+ DG2_PLL_ENABLE(phy) : MG_PLL_ENABLE(0));
+
+ /*
+ * 1. If the frequency will result in a change to the voltage
+ * requirement, follow the Display Voltage Frequency Switching -
+ * Sequence Before Frequency Change.
+ *
+ * We handle this step in bxt_set_cdclk().
+ */
+
+ /* 2. Software programs DPLL_ENABLE [PLL Enable] to "0" */
+ intel_uncore_rmw(&dev_priv->uncore, enable_reg, PLL_ENABLE, 0);
+
+ /*
+ * 4. Software programs SNPS_PHY_MPLLB_DIV dp_mpllb_force_en to "0".
+ * This will allow the PLL to stop running.
+ */
+ intel_uncore_rmw(&dev_priv->uncore, SNPS_PHY_MPLLB_DIV(phy),
+ SNPS_PHY_MPLLB_FORCE_EN, 0);
+
+ /*
+ * 5. Software polls DPLL_ENABLE [PLL Lock] for PHY acknowledgment
+ * (dp_txX_ack) that the new transmitter setting request is completed.
+ */
+ if (intel_de_wait_for_clear(dev_priv, enable_reg, PLL_LOCK, 5))
+ DRM_ERROR("Port %c PLL not locked\n", phy_name(phy));
+
+ /*
+ * 6. If the frequency will result in a change to the voltage
+ * requirement, follow the Display Voltage Frequency Switching -
+ * Sequence After Frequency Change.
+ *
+ * We handle this step in bxt_set_cdclk().
+ */
+}
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.h b/drivers/gpu/drm/i915/display/intel_snps_phy.h
new file mode 100644
index 000000000000..205ab46f0b67
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_SNPS_PHY_H__
+#define __INTEL_SNPS_PHY_H__
+
+struct intel_encoder;
+struct intel_crtc_state;
+
+int intel_mpllb_calc_state(struct intel_crtc_state *crtc_state,
+ struct intel_encoder *encoder);
+void intel_mpllb_enable(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state);
+void intel_mpllb_disable(struct intel_encoder *encoder);
+
+#endif /* __INTEL_SNPS_PHY_H__ */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d58864c7adc6..c0417c994b97 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2286,6 +2286,57 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define MG_DP_MODE_CFG_DP_X2_MODE (1 << 7)
#define MG_DP_MODE_CFG_DP_X1_MODE (1 << 6)

+/*
+ * DG2 SNPS PHY registers (TC1 = PHY_E)
+ */
+#define _SNPS_PHY_A_BASE 0x168000
+#define _SNPS_PHY_B_BASE 0x169000
+#define _SNPS_PHY(phy) _PHY(phy, \
+ _SNPS_PHY_A_BASE, \
+ _SNPS_PHY_B_BASE)
+#define _SNPS2(phy, reg) (_SNPS_PHY(phy) - \
+ _SNPS_PHY_A_BASE + (reg))
+#define _MMIO_SNPS(phy, reg) _MMIO(_SNPS2(phy, reg))
+#define _MMIO_SNPS_LN(ln, phy, reg) _MMIO(_SNPS2(phy, \
+ (reg) + (ln) * 0x10))
+
+#define SNPS_PHY_MPLLB_CP(phy) _MMIO_SNPS(phy, 0x168000)
+#define SNPS_PHY_MPLLB_CP_INT REG_GENMASK(31, 25)
+#define SNPS_PHY_MPLLB_CP_INT_GS REG_GENMASK(23, 17)
+#define SNPS_PHY_MPLLB_CP_PROP REG_GENMASK(15, 9)
+#define SNPS_PHY_MPLLB_CP_PROP_GS REG_GENMASK(7, 1)
+
+#define SNPS_PHY_MPLLB_DIV(phy) _MMIO_SNPS(phy, 0x168004)
+#define SNPS_PHY_MPLLB_FORCE_EN REG_BIT(31)
+#define SNPS_PHY_MPLLB_DIV5_CLK_EN REG_BIT(29)
+#define SNPS_PHY_MPLLB_V2I REG_GENMASK(27, 26)
+#define SNPS_PHY_MPLLB_FREQ_VCO REG_GENMASK(25, 24)
+#define SNPS_PHY_MPLLB_PMIX_EN REG_BIT(10)
+#define SNPS_PHY_MPLLB_TX_CLK_DIV REG_GENMASK(7, 5)
+
+#define SNPS_PHY_MPLLB_FRACN1(phy) _MMIO_SNPS(phy, 0x168008)
+#define SNPS_PHY_MPLLB_FRACN_EN REG_BIT(31)
+#define SNPS_PHY_MPLLB_FRACN_CGG_UPDATE_EN REG_BIT(30)
+#define SNPS_PHY_MPLLB_FRACN_DEN REG_GENMASK(15, 0)
+
+#define SNPS_PHY_MPLLB_FRACN2(phy) _MMIO_SNPS(phy, 0x16800C)
+#define SNPS_PHY_MPLLB_FRACN_REM REG_GENMASK(31, 16)
+#define SNPS_PHY_MPLLB_FRACN_QUOT REG_GENMASK(15, 0)
+
+#define SNPS_PHY_MPLLB_SSCEN(phy) _MMIO_SNPS(phy, 0x168014)
+#define SNPS_PHY_MPLLB_SSC_EN REG_BIT(31)
+#define SNPS_PHY_MPLLB_SSC_PEAK REG_GENMASK(29, 10)
+
+#define SNPS_PHY_MPLLB_SSCSTEP(phy) _MMIO_SNPS(phy, 0x168018)
+#define SNPS_PHY_MPLLB_SSC_STEPSIZE REG_GENMASK(31, 11)
+
+#define SNPS_PHY_MPLLB_DIV2(phy) _MMIO_SNPS(phy, 0x16801C)
+#define SNPS_PHY_MPLLB_REF_CLK_DIV REG_GENMASK(14, 12)
+#define SNPS_PHY_MPLLB_MULTIPLIER REG_GENMASK(11, 0)
+
+#define SNPS_PHY_REF_CONTROL(phy) _MMIO_SNPS(phy, 0x168188)
+#define SNPS_PHY_REF_CONTROL_REF_RANGE REG_GENMASK(31, 27)
+
/* The spec defines this only for BXT PHY0, but lets assume that this
* would exist for PHY1 too if it had a second channel.
*/
@@ -10601,6 +10652,11 @@ enum skl_power_gate {
#define CNL_DPLL_ENABLE(pll) _MMIO_PLL3(pll, DPLL0_ENABLE, DPLL1_ENABLE, \
_ADLS_DPLL2_ENABLE, _ADLS_DPLL3_ENABLE)

+#define _DG2_PLL3_ENABLE 0x4601C
+
+#define DG2_PLL_ENABLE(pll) _MMIO_PLL3(pll, DPLL0_ENABLE, DPLL1_ENABLE, \
+ _ADLS_DPLL2_ENABLE, _DG2_PLL3_ENABLE)
+
#define TBT_PLL_ENABLE _MMIO(0x46020)

#define _MG_PLL1_ENABLE 0x46030