| Message ID | 20230223134021.2236889-7-mika.kahola@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/i915/mtl: Add C10 and C20 phy support | expand |
Hi Mika, > -----Original Message----- > From: Kahola, Mika <mika.kahola@intel.com> > Sent: Thursday, February 23, 2023 5:40 AM > To: intel-gfx@lists.freedesktop.org > Cc: Sripada, Radhakrishna <radhakrishna.sripada@intel.com>; Deak, Imre > <imre.deak@intel.com>; Shankar, Uma <uma.shankar@intel.com>; Taylor, > Clinton A <clinton.a.taylor@intel.com>; Kahola, Mika <mika.kahola@intel.com> > Subject: [PATCH v3 06/22] drm/i915/mtl: Add vswing programming for C10 phys > > From: Radhakrishna Sripada <radhakrishna.sripada@intel.com> > > C10 phys uses direct mapping internally for voltage and pre-emphasis levels. > Program the levels directly to the fields in the VDR Registers. > > Bspec: 65449 > > v2: From table "C10: Tx EQ settings for DP 1.4x" it shows level 1 > and preemphasis 1 instead of two times of level 1 preemphasis 0. > Fix this in the driver code as well. > v3: VSwing update (Clint) > > Cc: Imre Deak <imre.deak@intel.com> > Cc: Uma Shankar <uma.shankar@intel.com> > Signed-off-by: Clint Taylor <Clinton.A.Taylor@intel.com> > Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com> > Signed-off-by: Mika Kahola <mika.kahola@intel.com> > --- > drivers/gpu/drm/i915/display/intel_cx0_phy.c | 140 ++++++++++++++++-- > drivers/gpu/drm/i915/display/intel_cx0_phy.h | 2 + > .../gpu/drm/i915/display/intel_cx0_phy_regs.h | 14 ++ > drivers/gpu/drm/i915/display/intel_ddi.c | 4 +- > .../drm/i915/display/intel_ddi_buf_trans.c | 36 ++++- > .../drm/i915/display/intel_ddi_buf_trans.h | 6 + > .../i915/display/intel_display_power_map.c | 1 + > 7 files changed, 192 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c > b/drivers/gpu/drm/i915/display/intel_cx0_phy.c > index c73d2bc3e1a8..3d61afbe7bdb 100644 > --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c > +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c > @@ -6,11 +6,15 @@ > #include "i915_reg.h" > #include "intel_cx0_phy.h" > #include "intel_cx0_phy_regs.h" > +#include "intel_ddi.h" > +#include "intel_ddi_buf_trans.h" > #include "intel_de.h" > #include "intel_display_types.h" > #include "intel_dp.h" > #include "intel_panel.h" > #include "intel_tc.h" > +#include "intel_psr.h" > +#include "intel_uncore.h" > > bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy) > { > @@ -20,6 +24,15 @@ bool intel_is_c10phy(struct drm_i915_private *dev_priv, > enum phy phy) > return false; > } > > +static void > +assert_dc_off(struct drm_i915_private *i915) > +{ > + bool enabled; > + > + enabled = intel_display_power_is_enabled(i915, > POWER_DOMAIN_DC_OFF); > + drm_WARN_ON(&i915->drm, !enabled); > +} > + > static void intel_cx0_bus_reset(struct drm_i915_private *i915, enum port port, > int lane) > { > enum phy phy = intel_port_to_phy(i915, port); > @@ -112,6 +125,8 @@ static u8 intel_cx0_read(struct drm_i915_private *i915, > enum port port, > int i, status = 0; > u32 val; > > + assert_dc_off(i915); > + > for (i = 0; i < 3; i++) { > status = __intel_cx0_read(i915, port, lane, addr, &val); > > @@ -194,6 +209,8 @@ static void __intel_cx0_write(struct drm_i915_private > *i915, enum port port, > enum phy phy = intel_port_to_phy(i915, port); > int i, status; > > + assert_dc_off(i915); > + > for (i = 0; i < 3; i++) { > status = __intel_cx0_write_once(i915, port, lane, addr, data, > committed); > > @@ -241,6 +258,89 @@ static void intel_cx0_rmw(struct drm_i915_private > *i915, enum port port, > } > } > > +/* > + * Prepare HW for CX0 phy transactions. > + * > + * It is required that PSR and DC5/6 are disabled before any CX0 message > + * bus transaction is executed. > + */ > +static intel_wakeref_t intel_cx0_phy_transaction_begin(struct intel_encoder > *encoder) > +{ > + struct drm_i915_private *i915 = to_i915(encoder->base.dev); > + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > + > + intel_psr_pause(intel_dp); > + return intel_display_power_get(i915, POWER_DOMAIN_DC_OFF); > +} > + > +static void intel_cx0_phy_transaction_end(struct intel_encoder *encoder, > intel_wakeref_t wakeref) > +{ > + struct drm_i915_private *i915 = to_i915(encoder->base.dev); > + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > + > + intel_psr_resume(intel_dp); > + intel_display_power_put(i915, POWER_DOMAIN_DC_OFF, wakeref); > +} > + > +void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state) > +{ > + struct drm_i915_private *i915 = to_i915(encoder->base.dev); > + struct intel_digital_port *dig_port = enc_to_dig_port(encoder); > + bool lane_reversal = dig_port->saved_port_bits & > DDI_BUF_PORT_REVERSAL; > + u8 master_lane = lane_reversal ? INTEL_CX0_LANE1 : > + INTEL_CX0_LANE0; > + u8 follower_lane = lane_reversal ? INTEL_CX0_LANE0 : > + INTEL_CX0_LANE1; > + const struct intel_ddi_buf_trans *trans; > + intel_wakeref_t wakeref; > + int n_entries, ln; > + > + wakeref = intel_cx0_phy_transaction_begin(encoder); > + > + trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries); > + if (drm_WARN_ON_ONCE(&i915->drm, !trans)) > + return; > + > + intel_cx0_rmw(i915, encoder->port, INTEL_CX0_BOTH_LANES, > PHY_C10_VDR_CONTROL(1), > + 0, C10_VDR_CTRL_MSGBUS_ACCESS, > MB_WRITE_COMMITTED); > + > + for (ln = 0; ln < 4; ln++) { > + int level = intel_ddi_level(encoder, crtc_state, ln); > + int lane, tx; > + > + lane = ln / 2 + 1; > + tx = ln % 2 + 1; > + > + intel_cx0_rmw(i915, encoder->port, lane, > PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 0), > + C10_PHY_OVRD_LEVEL_MASK, > + C10_PHY_OVRD_LEVEL(trans- > >entries[level].snps.pre_cursor), > + MB_WRITE_COMMITTED); > + intel_cx0_rmw(i915, encoder->port, lane, > PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 1), > + C10_PHY_OVRD_LEVEL_MASK, > + C10_PHY_OVRD_LEVEL(trans- > >entries[level].snps.vswing), > + MB_WRITE_COMMITTED); > + intel_cx0_rmw(i915, encoder->port, lane, > PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 2), > + C10_PHY_OVRD_LEVEL_MASK, > + C10_PHY_OVRD_LEVEL(trans- > >entries[level].snps.post_cursor), > + MB_WRITE_COMMITTED); > + } > + > + /* Write Override enables in 0xD71 */ > + intel_cx0_rmw(i915, encoder->port, INTEL_CX0_BOTH_LANES, > PHY_C10_VDR_OVRD, > + PHY_C10_VDR_OVRD_TX1 | PHY_C10_VDR_OVRD_TX2, > + PHY_C10_VDR_OVRD_TX1 | PHY_C10_VDR_OVRD_TX2, > + MB_WRITE_COMMITTED); > + intel_cx0_write(i915, encoder->port, follower_lane, > PHY_C10_VDR_CONTROL(1), > + C10_VDR_CTRL_MSGBUS_ACCESS | > C10_VDR_CTRL_UPDATE_CFG, > + MB_WRITE_COMMITTED); > + intel_cx0_write(i915, encoder->port, master_lane, > PHY_C10_VDR_CONTROL(1), > + C10_VDR_CTRL_MASTER_LANE | > C10_VDR_CTRL_MSGBUS_ACCESS | > + C10_VDR_CTRL_UPDATE_CFG, > MB_WRITE_COMMITTED); > + > + intel_cx0_phy_transaction_end(encoder, wakeref); > +} > + > /* > * Basic DP link rates with 38.4 MHz reference clock. > * Note: The tables below are with SSC. In non-ssc > @@ -1085,9 +1185,12 @@ void intel_c10mpllb_readout_hw_state(struct > intel_encoder *encoder, > u8 lane = lane_reversal ? INTEL_CX0_LANE1 : > INTEL_CX0_LANE0; > enum phy phy = intel_port_to_phy(i915, encoder->port); > + intel_wakeref_t wakeref; > int i; > u8 cmn, tx0; > > + wakeref = intel_cx0_phy_transaction_begin(encoder); > + > /* > * According to C10 VDR Register programming Sequence we need > * to do this to read PHY internal registers from MsgBus. > @@ -1106,6 +1209,8 @@ void intel_c10mpllb_readout_hw_state(struct > intel_encoder *encoder, > cmn != C10_CMN0_HDMI_VAL)) > drm_dbg_kms(&i915->drm, "Unexpected tx: %x or cmn: %x for > phy: %c.\n", > tx0, cmn, phy_name(phy)); > + > + intel_cx0_phy_transaction_end(encoder, wakeref); > } > > static void intel_c10_pll_program(struct drm_i915_private *i915, > @@ -1243,8 +1348,11 @@ static void intel_program_port_clock_ctl(struct > intel_encoder *encoder, > > if (intel_crtc_has_dp_encoder(crtc_state)) { > intel_dp = enc_to_intel_dp(encoder); > - ssc_enabled = intel_dp->dpcd[DP_MAX_DOWNSPREAD] & > - DP_MAX_DOWNSPREAD_0_5; > + ssc_enabled = (intel_dp->dpcd[DP_MAX_DOWNSPREAD] & > + DP_MAX_DOWNSPREAD_0_5); > + > + if (intel_dp_is_edp(intel_dp) && !intel_panel_use_ssc(i915)) > + ssc_enabled = false; > > if (!intel_panel_use_ssc(i915)) > ssc_enabled = false; > @@ -1252,11 +1360,11 @@ static void intel_program_port_clock_ctl(struct > intel_encoder *encoder, > /* TODO: DP2.0 10G and 20G rates enable MPLLA*/ > val |= ssc_enabled ? XELPDP_SSC_ENABLE_PLLB : 0; > } > + > intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), > - XELPDP_LANE1_PHY_CLOCK_SELECT | > - XELPDP_FORWARD_CLOCK_UNGATE | > + XELPDP_LANE1_PHY_CLOCK_SELECT | > XELPDP_FORWARD_CLOCK_UNGATE | > XELPDP_DDI_CLOCK_SELECT_MASK | > - XELPDP_SSC_ENABLE_PLLB, val); > + XELPDP_SSC_ENABLE_PLLA | XELPDP_SSC_ENABLE_PLLB, > val); > } > > static u32 intel_cx0_get_powerdown_update(u8 lane) > @@ -1396,9 +1504,12 @@ static void intel_cx0_program_phy_lane(struct > drm_i915_private *i915, > bool dp_alt_mode = > intel_tc_port_in_dp_alt_mode(enc_to_dig_port(encoder)); > enum port port = encoder->port; > > - intel_cx0_rmw(i915, port, INTEL_CX0_BOTH_LANES, > PHY_C10_VDR_CONTROL(1), > - C10_VDR_CTRL_MSGBUS_ACCESS, > C10_VDR_CTRL_MSGBUS_ACCESS, > - MB_WRITE_COMMITTED); > + intel_cx0_rmw(i915, port, INTEL_CX0_LANE1, > PHY_C10_VDR_CONTROL(1), > + C10_VDR_CTRL_MSGBUS_ACCESS | > C10_VDR_CTRL_UPDATE_CFG, > + C10_VDR_CTRL_MSGBUS_ACCESS, > MB_WRITE_COMMITTED); > + intel_cx0_rmw(i915, port, INTEL_CX0_LANE0, > PHY_C10_VDR_CONTROL(1), > + C10_VDR_CTRL_MSGBUS_ACCESS | > C10_VDR_CTRL_UPDATE_CFG, > + C10_VDR_CTRL_MASTER_LANE | > C10_VDR_CTRL_MSGBUS_ACCESS, MB_WRITE_COMMITTED); > > l0t1 = intel_cx0_read(i915, port, INTEL_CX0_LANE0, > PHY_CX0_TX_CONTROL(1, 2)); > l0t2 = intel_cx0_read(i915, port, INTEL_CX0_LANE0, > PHY_CX0_TX_CONTROL(2, 2)); > @@ -1561,9 +1672,14 @@ void intel_cx0pll_enable(struct intel_encoder > *encoder, > { > struct drm_i915_private *i915 = to_i915(encoder->base.dev); > enum phy phy = intel_port_to_phy(i915, encoder->port); > + intel_wakeref_t wakeref; > + > + wakeref = intel_cx0_phy_transaction_begin(encoder); > > drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy)); > intel_c10pll_enable(encoder, crtc_state); > + > + intel_cx0_phy_transaction_end(encoder, wakeref); > } > > static void intel_c10pll_disable(struct intel_encoder *encoder) > @@ -1608,7 +1724,8 @@ static void intel_c10pll_disable(struct intel_encoder > *encoder) > > /* 7. Program PORT_CLOCK_CTL register to disable and gate clocks. */ > intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), > - XELPDP_DDI_CLOCK_SELECT_MASK | > + XELPDP_DDI_CLOCK_SELECT_MASK, 0); > + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), > XELPDP_FORWARD_CLOCK_UNGATE, 0); > } > > @@ -1616,9 +1733,14 @@ void intel_cx0pll_disable(struct intel_encoder > *encoder) > { > struct drm_i915_private *i915 = to_i915(encoder->base.dev); > enum phy phy = intel_port_to_phy(i915, encoder->port); > + intel_wakeref_t wakeref; > + > + wakeref = intel_cx0_phy_transaction_begin(encoder); > > drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy)); > intel_c10pll_disable(encoder); > + > + intel_cx0_phy_transaction_end(encoder, wakeref); > } > > void intel_c10mpllb_state_verify(struct intel_atomic_state *state, > diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.h > b/drivers/gpu/drm/i915/display/intel_cx0_phy.h > index f8023f240727..952c7deeffaa 100644 > --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.h > +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.h > @@ -40,5 +40,7 @@ int intel_c10mpllb_calc_port_clock(struct intel_encoder > *encoder, > void intel_c10mpllb_state_verify(struct intel_atomic_state *state, > struct intel_crtc_state *new_crtc_state); > int intel_c10_phy_check_hdmi_link_rate(int clock); > +void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state); > > #endif /* __INTEL_CX0_PHY_H__ */ > diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h > b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h > index f6002b70ddbe..9bf7408fb363 100644 > --- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h > +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h > @@ -162,6 +162,14 @@ > #define CX0_P4PG_STATE_DISABLE 0xC > #define CX0_P2_STATE_RESET 0x2 > > +#define PHY_C10_VDR_OVRD 0xD71 > +#define PHY_C10_VDR_OVRD_TX1 REG_BIT8(0) > +#define PHY_C10_VDR_OVRD_TX2 REG_BIT8(2) > +#define PHY_C10_VDR_PRE_OVRD_TX1 0xD80 > +#define C10_PHY_OVRD_LEVEL_MASK REG_GENMASK8(5, 0) > +#define C10_PHY_OVRD_LEVEL(val) > REG_FIELD_PREP8(C10_PHY_OVRD_LEVEL_MASK, val) > +#define PHY_CX0_VDR_OVRD_CONTROL(lane, tx, control) > (PHY_C10_VDR_PRE_OVRD_TX1 + ((lane) ^ ((tx) - 1)) * 0x10 + (control)) > + > /* PHY_C10_VDR_PLL0 */ > #define PLL_C10_MPLL_SSC_EN REG_BIT8(0) > > @@ -169,4 +177,10 @@ > #define PHY_CX0_TX_CONTROL(tx, control) (0x400 + ((tx) - 1) * 0x200 + > (control)) > #define CONTROL2_DISABLE_SINGLE_TX REG_BIT(6) > > +/* C10 Phy VSWING Masks */ > +#define C10_PHY_VSWING_LEVEL_MASK REG_GENMASK8(2, 0) > +#define C10_PHY_VSWING_LEVEL(val) > REG_FIELD_PREP8(C10_PHY_VSWING_LEVEL_MASK, val) > +#define C10_PHY_VSWING_PREEMPH_MASK REG_GENMASK8(1, 0) > +#define C10_PHY_VSWING_PREEMPH(val) > REG_FIELD_PREP8(C10_PHY_VSWING_PREEMPH_MASK, val) > + > #endif /* __INTEL_CX0_PHY_REGS_H__ */ > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c > b/drivers/gpu/drm/i915/display/intel_ddi.c > index d48e1ffdfc71..60c38bc77683 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > @@ -4457,7 +4457,9 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, > enum port port) > encoder->get_config = hsw_ddi_get_config; > } > > - if (IS_DG2(dev_priv)) { > + if (DISPLAY_VER(dev_priv) >= 14) { > + encoder->set_signal_levels = intel_cx0_phy_set_signal_levels; > + } else if (IS_DG2(dev_priv)) { > encoder->set_signal_levels = intel_snps_phy_set_signal_levels; > } else if (DISPLAY_VER(dev_priv) >= 12) { > if (intel_phy_is_combo(dev_priv, phy)) > diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c > b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c > index 006a2e979000..d5a9aa2de2fa 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c > +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c > @@ -1035,6 +1035,30 @@ static const struct intel_ddi_buf_trans > dg2_snps_trans_uhbr = { > .num_entries = ARRAY_SIZE(_dg2_snps_trans_uhbr), > }; > > +/* > + * Some platforms don't need a mapping table and only expect us to > + * to program the vswing + preemphasis levels directly since the > + * hardware will do its own mapping to tuning values internally. > + */ > +static const union intel_ddi_buf_trans_entry _mtl_c10_trans_dp14[] = { > + { .snps = { 26, 0, 0 } }, /* preset 0 */ > + { .snps = { 33, 0, 6 } }, /* preset 1 */ > + { .snps = { 38, 0, 11 } }, /* preset 2 */ > + { .snps = { 43, 0, 19 } }, /* preset 3 */ > + { .snps = { 39, 0, 0 } }, /* preset 4 */ > + { .snps = { 45, 0, 7 } }, /* preset 5 */ > + { .snps = { 46, 0, 13 } }, /* preset 6 */ > + { .snps = { 46, 0, 0 } }, /* preset 7 */ > + { .snps = { 55, 0, 7 } }, /* preset 8 */ > + { .snps = { 62, 0, 0 } }, /* preset 9 */ > +}; > + > +static const struct intel_ddi_buf_trans mtl_cx0_trans = { > + .entries = _mtl_c10_trans_dp14, > + .num_entries = ARRAY_SIZE(_mtl_c10_trans_dp14), > + .hdmi_default_entry = ARRAY_SIZE(_mtl_c10_trans_dp14) - 1, > +}; > + > bool is_hobl_buf_trans(const struct intel_ddi_buf_trans *table) > { > return table == &tgl_combo_phy_trans_edp_hbr2_hobl; > @@ -1606,12 +1630,22 @@ dg2_get_snps_buf_trans(struct intel_encoder > *encoder, > return intel_get_buf_trans(&dg2_snps_trans, n_entries); > } > > +static const struct intel_ddi_buf_trans * > +mtl_get_cx0_buf_trans(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state, > + int *n_entries) > +{ > + return intel_get_buf_trans(&mtl_cx0_trans, n_entries); > +} > + > void intel_ddi_buf_trans_init(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 (IS_DG2(i915)) { > + if (DISPLAY_VER(i915) >= 14) { > + encoder->get_buf_trans = mtl_get_cx0_buf_trans; > + } else if (IS_DG2(i915)) { > encoder->get_buf_trans = dg2_get_snps_buf_trans; > } else if (IS_ALDERLAKE_P(i915)) { > if (intel_phy_is_combo(i915, phy)) > diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h > b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h > index 2133984a572b..e4a857b9829d 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h > +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h > @@ -51,6 +51,11 @@ struct dg2_snps_phy_buf_trans { > u8 post_cursor; > }; > > +struct direct_phy_buf_trans { > + u8 level; > + u8 preemph; > +}; > + > union intel_ddi_buf_trans_entry { > struct hsw_ddi_buf_trans hsw; > struct bxt_ddi_buf_trans bxt; > @@ -58,6 +63,7 @@ union intel_ddi_buf_trans_entry { > struct icl_mg_phy_ddi_buf_trans mg; > struct tgl_dkl_phy_ddi_buf_trans dkl; > struct dg2_snps_phy_buf_trans snps; > + struct direct_phy_buf_trans direct; > }; > > struct intel_ddi_buf_trans { > diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c > b/drivers/gpu/drm/i915/display/intel_display_power_map.c > index 6645eb1911d8..5ec2b9a109ae 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_power_map.c > +++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c > @@ -1427,6 +1427,7 @@ I915_DECL_PW_DOMAINS(xelpdp_pwdoms_dc_off, > XELPDP_PW_2_POWER_DOMAINS, > POWER_DOMAIN_AUDIO_MMIO, > POWER_DOMAIN_MODESET, > + POWER_DOMAIN_DC_OFF, Is this ^ redundant here? -Radhakrishna(RK) Sripada > POWER_DOMAIN_AUX_A, > POWER_DOMAIN_AUX_B, > POWER_DOMAIN_DC_OFF, > -- > 2.34.1
diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c index c73d2bc3e1a8..3d61afbe7bdb 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c @@ -6,11 +6,15 @@ #include "i915_reg.h" #include "intel_cx0_phy.h" #include "intel_cx0_phy_regs.h" +#include "intel_ddi.h" +#include "intel_ddi_buf_trans.h" #include "intel_de.h" #include "intel_display_types.h" #include "intel_dp.h" #include "intel_panel.h" #include "intel_tc.h" +#include "intel_psr.h" +#include "intel_uncore.h" bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy) { @@ -20,6 +24,15 @@ bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy) return false; } +static void +assert_dc_off(struct drm_i915_private *i915) +{ + bool enabled; + + enabled = intel_display_power_is_enabled(i915, POWER_DOMAIN_DC_OFF); + drm_WARN_ON(&i915->drm, !enabled); +} + static void intel_cx0_bus_reset(struct drm_i915_private *i915, enum port port, int lane) { enum phy phy = intel_port_to_phy(i915, port); @@ -112,6 +125,8 @@ static u8 intel_cx0_read(struct drm_i915_private *i915, enum port port, int i, status = 0; u32 val; + assert_dc_off(i915); + for (i = 0; i < 3; i++) { status = __intel_cx0_read(i915, port, lane, addr, &val); @@ -194,6 +209,8 @@ static void __intel_cx0_write(struct drm_i915_private *i915, enum port port, enum phy phy = intel_port_to_phy(i915, port); int i, status; + assert_dc_off(i915); + for (i = 0; i < 3; i++) { status = __intel_cx0_write_once(i915, port, lane, addr, data, committed); @@ -241,6 +258,89 @@ static void intel_cx0_rmw(struct drm_i915_private *i915, enum port port, } } +/* + * Prepare HW for CX0 phy transactions. + * + * It is required that PSR and DC5/6 are disabled before any CX0 message + * bus transaction is executed. + */ +static intel_wakeref_t intel_cx0_phy_transaction_begin(struct intel_encoder *encoder) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + + intel_psr_pause(intel_dp); + return intel_display_power_get(i915, POWER_DOMAIN_DC_OFF); +} + +static void intel_cx0_phy_transaction_end(struct intel_encoder *encoder, intel_wakeref_t wakeref) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + + intel_psr_resume(intel_dp); + intel_display_power_put(i915, POWER_DOMAIN_DC_OFF, wakeref); +} + +void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_digital_port *dig_port = enc_to_dig_port(encoder); + bool lane_reversal = dig_port->saved_port_bits & DDI_BUF_PORT_REVERSAL; + u8 master_lane = lane_reversal ? INTEL_CX0_LANE1 : + INTEL_CX0_LANE0; + u8 follower_lane = lane_reversal ? INTEL_CX0_LANE0 : + INTEL_CX0_LANE1; + const struct intel_ddi_buf_trans *trans; + intel_wakeref_t wakeref; + int n_entries, ln; + + wakeref = intel_cx0_phy_transaction_begin(encoder); + + trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries); + if (drm_WARN_ON_ONCE(&i915->drm, !trans)) + return; + + intel_cx0_rmw(i915, encoder->port, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_CONTROL(1), + 0, C10_VDR_CTRL_MSGBUS_ACCESS, MB_WRITE_COMMITTED); + + for (ln = 0; ln < 4; ln++) { + int level = intel_ddi_level(encoder, crtc_state, ln); + int lane, tx; + + lane = ln / 2 + 1; + tx = ln % 2 + 1; + + intel_cx0_rmw(i915, encoder->port, lane, PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 0), + C10_PHY_OVRD_LEVEL_MASK, + C10_PHY_OVRD_LEVEL(trans->entries[level].snps.pre_cursor), + MB_WRITE_COMMITTED); + intel_cx0_rmw(i915, encoder->port, lane, PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 1), + C10_PHY_OVRD_LEVEL_MASK, + C10_PHY_OVRD_LEVEL(trans->entries[level].snps.vswing), + MB_WRITE_COMMITTED); + intel_cx0_rmw(i915, encoder->port, lane, PHY_CX0_VDR_OVRD_CONTROL(lane, tx, 2), + C10_PHY_OVRD_LEVEL_MASK, + C10_PHY_OVRD_LEVEL(trans->entries[level].snps.post_cursor), + MB_WRITE_COMMITTED); + } + + /* Write Override enables in 0xD71 */ + intel_cx0_rmw(i915, encoder->port, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_OVRD, + PHY_C10_VDR_OVRD_TX1 | PHY_C10_VDR_OVRD_TX2, + PHY_C10_VDR_OVRD_TX1 | PHY_C10_VDR_OVRD_TX2, + MB_WRITE_COMMITTED); + intel_cx0_write(i915, encoder->port, follower_lane, PHY_C10_VDR_CONTROL(1), + C10_VDR_CTRL_MSGBUS_ACCESS | C10_VDR_CTRL_UPDATE_CFG, + MB_WRITE_COMMITTED); + intel_cx0_write(i915, encoder->port, master_lane, PHY_C10_VDR_CONTROL(1), + C10_VDR_CTRL_MASTER_LANE | C10_VDR_CTRL_MSGBUS_ACCESS | + C10_VDR_CTRL_UPDATE_CFG, MB_WRITE_COMMITTED); + + intel_cx0_phy_transaction_end(encoder, wakeref); +} + /* * Basic DP link rates with 38.4 MHz reference clock. * Note: The tables below are with SSC. In non-ssc @@ -1085,9 +1185,12 @@ void intel_c10mpllb_readout_hw_state(struct intel_encoder *encoder, u8 lane = lane_reversal ? INTEL_CX0_LANE1 : INTEL_CX0_LANE0; enum phy phy = intel_port_to_phy(i915, encoder->port); + intel_wakeref_t wakeref; int i; u8 cmn, tx0; + wakeref = intel_cx0_phy_transaction_begin(encoder); + /* * According to C10 VDR Register programming Sequence we need * to do this to read PHY internal registers from MsgBus. @@ -1106,6 +1209,8 @@ void intel_c10mpllb_readout_hw_state(struct intel_encoder *encoder, cmn != C10_CMN0_HDMI_VAL)) drm_dbg_kms(&i915->drm, "Unexpected tx: %x or cmn: %x for phy: %c.\n", tx0, cmn, phy_name(phy)); + + intel_cx0_phy_transaction_end(encoder, wakeref); } static void intel_c10_pll_program(struct drm_i915_private *i915, @@ -1243,8 +1348,11 @@ static void intel_program_port_clock_ctl(struct intel_encoder *encoder, if (intel_crtc_has_dp_encoder(crtc_state)) { intel_dp = enc_to_intel_dp(encoder); - ssc_enabled = intel_dp->dpcd[DP_MAX_DOWNSPREAD] & - DP_MAX_DOWNSPREAD_0_5; + ssc_enabled = (intel_dp->dpcd[DP_MAX_DOWNSPREAD] & + DP_MAX_DOWNSPREAD_0_5); + + if (intel_dp_is_edp(intel_dp) && !intel_panel_use_ssc(i915)) + ssc_enabled = false; if (!intel_panel_use_ssc(i915)) ssc_enabled = false; @@ -1252,11 +1360,11 @@ static void intel_program_port_clock_ctl(struct intel_encoder *encoder, /* TODO: DP2.0 10G and 20G rates enable MPLLA*/ val |= ssc_enabled ? XELPDP_SSC_ENABLE_PLLB : 0; } + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), - XELPDP_LANE1_PHY_CLOCK_SELECT | - XELPDP_FORWARD_CLOCK_UNGATE | + XELPDP_LANE1_PHY_CLOCK_SELECT | XELPDP_FORWARD_CLOCK_UNGATE | XELPDP_DDI_CLOCK_SELECT_MASK | - XELPDP_SSC_ENABLE_PLLB, val); + XELPDP_SSC_ENABLE_PLLA | XELPDP_SSC_ENABLE_PLLB, val); } static u32 intel_cx0_get_powerdown_update(u8 lane) @@ -1396,9 +1504,12 @@ static void intel_cx0_program_phy_lane(struct drm_i915_private *i915, bool dp_alt_mode = intel_tc_port_in_dp_alt_mode(enc_to_dig_port(encoder)); enum port port = encoder->port; - intel_cx0_rmw(i915, port, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_CONTROL(1), - C10_VDR_CTRL_MSGBUS_ACCESS, C10_VDR_CTRL_MSGBUS_ACCESS, - MB_WRITE_COMMITTED); + intel_cx0_rmw(i915, port, INTEL_CX0_LANE1, PHY_C10_VDR_CONTROL(1), + C10_VDR_CTRL_MSGBUS_ACCESS | C10_VDR_CTRL_UPDATE_CFG, + C10_VDR_CTRL_MSGBUS_ACCESS, MB_WRITE_COMMITTED); + intel_cx0_rmw(i915, port, INTEL_CX0_LANE0, PHY_C10_VDR_CONTROL(1), + C10_VDR_CTRL_MSGBUS_ACCESS | C10_VDR_CTRL_UPDATE_CFG, + C10_VDR_CTRL_MASTER_LANE | C10_VDR_CTRL_MSGBUS_ACCESS, MB_WRITE_COMMITTED); l0t1 = intel_cx0_read(i915, port, INTEL_CX0_LANE0, PHY_CX0_TX_CONTROL(1, 2)); l0t2 = intel_cx0_read(i915, port, INTEL_CX0_LANE0, PHY_CX0_TX_CONTROL(2, 2)); @@ -1561,9 +1672,14 @@ void intel_cx0pll_enable(struct intel_encoder *encoder, { struct drm_i915_private *i915 = to_i915(encoder->base.dev); enum phy phy = intel_port_to_phy(i915, encoder->port); + intel_wakeref_t wakeref; + + wakeref = intel_cx0_phy_transaction_begin(encoder); drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy)); intel_c10pll_enable(encoder, crtc_state); + + intel_cx0_phy_transaction_end(encoder, wakeref); } static void intel_c10pll_disable(struct intel_encoder *encoder) @@ -1608,7 +1724,8 @@ static void intel_c10pll_disable(struct intel_encoder *encoder) /* 7. Program PORT_CLOCK_CTL register to disable and gate clocks. */ intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), - XELPDP_DDI_CLOCK_SELECT_MASK | + XELPDP_DDI_CLOCK_SELECT_MASK, 0); + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port), XELPDP_FORWARD_CLOCK_UNGATE, 0); } @@ -1616,9 +1733,14 @@ void intel_cx0pll_disable(struct intel_encoder *encoder) { struct drm_i915_private *i915 = to_i915(encoder->base.dev); enum phy phy = intel_port_to_phy(i915, encoder->port); + intel_wakeref_t wakeref; + + wakeref = intel_cx0_phy_transaction_begin(encoder); drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy)); intel_c10pll_disable(encoder); + + intel_cx0_phy_transaction_end(encoder, wakeref); } void intel_c10mpllb_state_verify(struct intel_atomic_state *state, diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.h b/drivers/gpu/drm/i915/display/intel_cx0_phy.h index f8023f240727..952c7deeffaa 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.h +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.h @@ -40,5 +40,7 @@ int intel_c10mpllb_calc_port_clock(struct intel_encoder *encoder, void intel_c10mpllb_state_verify(struct intel_atomic_state *state, struct intel_crtc_state *new_crtc_state); int intel_c10_phy_check_hdmi_link_rate(int clock); +void intel_cx0_phy_set_signal_levels(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state); #endif /* __INTEL_CX0_PHY_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h index f6002b70ddbe..9bf7408fb363 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h @@ -162,6 +162,14 @@ #define CX0_P4PG_STATE_DISABLE 0xC #define CX0_P2_STATE_RESET 0x2 +#define PHY_C10_VDR_OVRD 0xD71 +#define PHY_C10_VDR_OVRD_TX1 REG_BIT8(0) +#define PHY_C10_VDR_OVRD_TX2 REG_BIT8(2) +#define PHY_C10_VDR_PRE_OVRD_TX1 0xD80 +#define C10_PHY_OVRD_LEVEL_MASK REG_GENMASK8(5, 0) +#define C10_PHY_OVRD_LEVEL(val) REG_FIELD_PREP8(C10_PHY_OVRD_LEVEL_MASK, val) +#define PHY_CX0_VDR_OVRD_CONTROL(lane, tx, control) (PHY_C10_VDR_PRE_OVRD_TX1 + ((lane) ^ ((tx) - 1)) * 0x10 + (control)) + /* PHY_C10_VDR_PLL0 */ #define PLL_C10_MPLL_SSC_EN REG_BIT8(0) @@ -169,4 +177,10 @@ #define PHY_CX0_TX_CONTROL(tx, control) (0x400 + ((tx) - 1) * 0x200 + (control)) #define CONTROL2_DISABLE_SINGLE_TX REG_BIT(6) +/* C10 Phy VSWING Masks */ +#define C10_PHY_VSWING_LEVEL_MASK REG_GENMASK8(2, 0) +#define C10_PHY_VSWING_LEVEL(val) REG_FIELD_PREP8(C10_PHY_VSWING_LEVEL_MASK, val) +#define C10_PHY_VSWING_PREEMPH_MASK REG_GENMASK8(1, 0) +#define C10_PHY_VSWING_PREEMPH(val) REG_FIELD_PREP8(C10_PHY_VSWING_PREEMPH_MASK, val) + #endif /* __INTEL_CX0_PHY_REGS_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index d48e1ffdfc71..60c38bc77683 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -4457,7 +4457,9 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port) encoder->get_config = hsw_ddi_get_config; } - if (IS_DG2(dev_priv)) { + if (DISPLAY_VER(dev_priv) >= 14) { + encoder->set_signal_levels = intel_cx0_phy_set_signal_levels; + } else if (IS_DG2(dev_priv)) { encoder->set_signal_levels = intel_snps_phy_set_signal_levels; } else if (DISPLAY_VER(dev_priv) >= 12) { if (intel_phy_is_combo(dev_priv, phy)) diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c index 006a2e979000..d5a9aa2de2fa 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c @@ -1035,6 +1035,30 @@ static const struct intel_ddi_buf_trans dg2_snps_trans_uhbr = { .num_entries = ARRAY_SIZE(_dg2_snps_trans_uhbr), }; +/* + * Some platforms don't need a mapping table and only expect us to + * to program the vswing + preemphasis levels directly since the + * hardware will do its own mapping to tuning values internally. + */ +static const union intel_ddi_buf_trans_entry _mtl_c10_trans_dp14[] = { + { .snps = { 26, 0, 0 } }, /* preset 0 */ + { .snps = { 33, 0, 6 } }, /* preset 1 */ + { .snps = { 38, 0, 11 } }, /* preset 2 */ + { .snps = { 43, 0, 19 } }, /* preset 3 */ + { .snps = { 39, 0, 0 } }, /* preset 4 */ + { .snps = { 45, 0, 7 } }, /* preset 5 */ + { .snps = { 46, 0, 13 } }, /* preset 6 */ + { .snps = { 46, 0, 0 } }, /* preset 7 */ + { .snps = { 55, 0, 7 } }, /* preset 8 */ + { .snps = { 62, 0, 0 } }, /* preset 9 */ +}; + +static const struct intel_ddi_buf_trans mtl_cx0_trans = { + .entries = _mtl_c10_trans_dp14, + .num_entries = ARRAY_SIZE(_mtl_c10_trans_dp14), + .hdmi_default_entry = ARRAY_SIZE(_mtl_c10_trans_dp14) - 1, +}; + bool is_hobl_buf_trans(const struct intel_ddi_buf_trans *table) { return table == &tgl_combo_phy_trans_edp_hbr2_hobl; @@ -1606,12 +1630,22 @@ dg2_get_snps_buf_trans(struct intel_encoder *encoder, return intel_get_buf_trans(&dg2_snps_trans, n_entries); } +static const struct intel_ddi_buf_trans * +mtl_get_cx0_buf_trans(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + int *n_entries) +{ + return intel_get_buf_trans(&mtl_cx0_trans, n_entries); +} + void intel_ddi_buf_trans_init(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 (IS_DG2(i915)) { + if (DISPLAY_VER(i915) >= 14) { + encoder->get_buf_trans = mtl_get_cx0_buf_trans; + } else if (IS_DG2(i915)) { encoder->get_buf_trans = dg2_get_snps_buf_trans; } else if (IS_ALDERLAKE_P(i915)) { if (intel_phy_is_combo(i915, phy)) diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h index 2133984a572b..e4a857b9829d 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.h @@ -51,6 +51,11 @@ struct dg2_snps_phy_buf_trans { u8 post_cursor; }; +struct direct_phy_buf_trans { + u8 level; + u8 preemph; +}; + union intel_ddi_buf_trans_entry { struct hsw_ddi_buf_trans hsw; struct bxt_ddi_buf_trans bxt; @@ -58,6 +63,7 @@ union intel_ddi_buf_trans_entry { struct icl_mg_phy_ddi_buf_trans mg; struct tgl_dkl_phy_ddi_buf_trans dkl; struct dg2_snps_phy_buf_trans snps; + struct direct_phy_buf_trans direct; }; struct intel_ddi_buf_trans { diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c index 6645eb1911d8..5ec2b9a109ae 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power_map.c +++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c @@ -1427,6 +1427,7 @@ I915_DECL_PW_DOMAINS(xelpdp_pwdoms_dc_off, XELPDP_PW_2_POWER_DOMAINS, POWER_DOMAIN_AUDIO_MMIO, POWER_DOMAIN_MODESET, + POWER_DOMAIN_DC_OFF, POWER_DOMAIN_AUX_A, POWER_DOMAIN_AUX_B, POWER_DOMAIN_DC_OFF,