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From: Matt Roper <matthew.d.roper@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Jani Nikula <jani.nikula@intel.com>
Subject: [Intel-gfx] [PATCH v2 43/50] drm/i915/dg2: Add vswing programming for SNPS phys
Date: Tue, 13 Jul 2021 20:15:33 -0700	[thread overview]
Message-ID: <20210714031540.3539704-44-matthew.d.roper@intel.com> (raw)
In-Reply-To: <20210714031540.3539704-1-matthew.d.roper@intel.com>

Vswing programming for SNPS PHYs is just a single step -- look up the
value that corresponds to the voltage level from a table and program it
into the SNPS_PHY_TX_EQ register.

Bspec: 53920
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c      | 23 ++++++--
 drivers/gpu/drm/i915/display/intel_snps_phy.c | 54 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_snps_phy.h |  4 ++
 drivers/gpu/drm/i915/i915_reg.h               |  5 ++
 4 files changed, 83 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 929a95ddb316..ade03cf41caa 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1496,6 +1496,16 @@ static int intel_ddi_dp_level(struct intel_dp *intel_dp)
 	return translate_signal_level(intel_dp, signal_levels);
 }
 
+static void
+dg2_set_signal_levels(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state)
+{
+	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
+	int level = intel_ddi_dp_level(intel_dp);
+
+	intel_snps_phy_ddi_vswing_sequence(encoder, level);
+}
+
 static void
 tgl_set_signal_levels(struct intel_dp *intel_dp,
 		      const struct intel_crtc_state *crtc_state)
@@ -2563,7 +2573,10 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state,
 	 */
 
 	/* 7.e Configure voltage swing and related IO settings */
-	tgl_ddi_vswing_sequence(encoder, crtc_state, level);
+	if (IS_DG2(dev_priv))
+		intel_snps_phy_ddi_vswing_sequence(encoder, level);
+	else
+		tgl_ddi_vswing_sequence(encoder, crtc_state, level);
 
 	/*
 	 * 7.f Combo PHY: Configure PORT_CL_DW10 Static Power Down to power up
@@ -3102,7 +3115,9 @@ static void intel_enable_ddi_hdmi(struct intel_atomic_state *state,
 			    "[CONNECTOR:%d:%s] Failed to configure sink scrambling/TMDS bit clock ratio\n",
 			    connector->base.id, connector->name);
 
-	if (DISPLAY_VER(dev_priv) >= 12)
+	if (IS_DG2(dev_priv))
+		intel_snps_phy_ddi_vswing_sequence(encoder, U32_MAX);
+	else if (DISPLAY_VER(dev_priv) >= 12)
 		tgl_ddi_vswing_sequence(encoder, crtc_state, level);
 	else if (DISPLAY_VER(dev_priv) == 11)
 		icl_ddi_vswing_sequence(encoder, crtc_state, level);
@@ -4075,7 +4090,9 @@ intel_ddi_init_dp_connector(struct intel_digital_port *dig_port)
 	dig_port->dp.set_link_train = intel_ddi_set_link_train;
 	dig_port->dp.set_idle_link_train = intel_ddi_set_idle_link_train;
 
-	if (DISPLAY_VER(dev_priv) >= 12)
+	if (IS_DG2(dev_priv))
+		dig_port->dp.set_signal_levels = dg2_set_signal_levels;
+	else if (DISPLAY_VER(dev_priv) >= 12)
 		dig_port->dp.set_signal_levels = tgl_set_signal_levels;
 	else if (DISPLAY_VER(dev_priv) >= 11)
 		dig_port->dp.set_signal_levels = icl_set_signal_levels;
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c
index 1317b4e94b50..77759bda98a4 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c
@@ -21,6 +21,60 @@
  * since it is not handled by the shared DPLL framework as on other platforms.
  */
 
+static const u32 dg2_ddi_translations[] = {
+	/* VS 0, pre-emph 0 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 26),
+
+	/* VS 0, pre-emph 1 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 33) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 6),
+
+	/* VS 0, pre-emph 2 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 38) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 12),
+
+	/* VS 0, pre-emph 3 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 43) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 19),
+
+	/* VS 1, pre-emph 0 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 39),
+
+	/* VS 1, pre-emph 1 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 44) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 8),
+
+	/* VS 1, pre-emph 2 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 47) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 15),
+
+	/* VS 2, pre-emph 0 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 52),
+
+	/* VS 2, pre-emph 1 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 51) |
+		REG_FIELD_PREP(SNPS_PHY_TX_EQ_POST, 10),
+
+	/* VS 3, pre-emph 0 */
+	REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, 62),
+};
+
+void intel_snps_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
+					u32 level)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+	int n_entries, ln;
+
+	n_entries = ARRAY_SIZE(dg2_ddi_translations);
+	if (level >= n_entries)
+		level = n_entries - 1;
+
+	for (ln = 0; ln < 4; ln++)
+		intel_de_write(dev_priv, SNPS_PHY_TX_EQ(ln, phy),
+			       dg2_ddi_translations[level]);
+}
+
 /*
  * Basic DP link rates with 100 MHz reference clock.
  */
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.h b/drivers/gpu/drm/i915/display/intel_snps_phy.h
index ca4c2a25182b..3ce92d424f66 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_phy.h
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.h
@@ -6,6 +6,8 @@
 #ifndef __INTEL_SNPS_PHY_H__
 #define __INTEL_SNPS_PHY_H__
 
+#include <linux/types.h>
+
 struct intel_encoder;
 struct intel_crtc_state;
 struct intel_mpllb_state;
@@ -21,5 +23,7 @@ int intel_mpllb_calc_port_clock(struct intel_encoder *encoder,
 				const struct intel_mpllb_state *pll_state);
 
 int intel_snps_phy_check_hdmi_link_rate(int clock);
+void intel_snps_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
+					u32 level);
 
 #endif /* __INTEL_SNPS_PHY_H__ */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 92408b4e2730..c44031dcdcb4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2340,6 +2340,11 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define SNPS_PHY_REF_CONTROL(phy)		_MMIO_SNPS(phy, 0x168188)
 #define   SNPS_PHY_REF_CONTROL_REF_RANGE	REG_GENMASK(31, 27)
 
+#define SNPS_PHY_TX_EQ(ln, phy)			_MMIO_SNPS_LN(ln, phy, 0x168300)
+#define   SNPS_PHY_TX_EQ_MAIN			REG_GENMASK(23, 18)
+#define   SNPS_PHY_TX_EQ_POST			REG_GENMASK(15, 10)
+#define   SNPS_PHY_TX_EQ_PRE			REG_GENMASK(7, 2)
+
 /* The spec defines this only for BXT PHY0, but lets assume that this
  * would exist for PHY1 too if it had a second channel.
  */
-- 
2.25.4

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  parent reply	other threads:[~2021-07-14  3:16 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-14  3:14 [Intel-gfx] [PATCH v2 00/50] Begin enabling Xe_HP SDV and DG2 platforms Matt Roper
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 01/50] drm/i915: Add XE_HP initial definitions Matt Roper
2021-07-19 18:05   ` Souza, Jose
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 02/50] drm/i915: Fork DG1 interrupt handler Matt Roper
2021-07-19 21:18   ` Matt Atwood
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 03/50] drm/i915/xehp: VDBOX/VEBOX fusing registers are enable-based Matt Roper
2021-07-19 21:20   ` Matt Atwood
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 04/50] drm/i915/gen12: Use fuse info to enable SFC Matt Roper
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 05/50] drm/i915/selftests: Allow for larger engine counts Matt Roper
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 06/50] drm/i915/xehp: Extra media engines - Part 1 (engine definitions) Matt Roper
2021-07-20 23:03   ` Lucas De Marchi
2021-07-20 23:40     ` John Harrison
2021-07-20 23:49       ` Lucas De Marchi
2021-07-21 18:23   ` Lucas De Marchi
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 07/50] drm/i915/xehp: Extra media engines - Part 2 (interrupts) Matt Roper
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 08/50] drm/i915/xehp: Extra media engines - Part 3 (reset) Matt Roper
2021-07-19 18:13   ` Souza, Jose
2021-07-20 20:39   ` Matt Atwood
2021-07-14  3:14 ` [Intel-gfx] [PATCH v2 09/50] drm/i915/xehp: Xe_HP forcewake support Matt Roper
2021-07-20 20:57   ` Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 10/50] drm/i915/xehp: Define multicast register ranges Matt Roper
2021-07-19 18:19   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 11/50] drm/i915/xehp: Handle new device context ID format Matt Roper
2021-07-20 21:39   ` Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 12/50] drm/i915/xehp: New engine context offsets Matt Roper
2021-07-20 22:06   ` Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 13/50] drm/i915/xehp: handle new steering options Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 14/50] drm/i915/xehp: Loop over all gslices for INSTDONE processing Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 15/50] drm/i915/xehpsdv: add initial XeHP SDV definitions Matt Roper
2021-07-19 18:20   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 16/50] drm/i915/xehp: Changes to ss/eu definitions Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 17/50] drm/i915/xehpsdv: Add maximum sseu limits Matt Roper
2021-07-18 13:10   ` Yokoyama, Caz
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 18/50] drm/i915/xehpsdv: Add compute DSS type Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 19/50] drm/i915/xehpsdv: Define steering tables Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 20/50] drm/i915/xehpsdv: Define MOCS table for XeHP SDV Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 21/50] drm/i915/xehpsdv: factor out function to read RP_STATE_CAP Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 22/50] drm/i915/xehpsdv: Read correct RP_STATE_CAP register Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 23/50] drm/i915/dg2: add DG2 platform info Matt Roper
2021-07-19 18:21   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 24/50] drm/i915/dg2: DG2 uses the same sseu limits as XeHP SDV Matt Roper
2021-07-16 16:06   ` Yokoyama, Caz
2021-07-19 18:22   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 25/50] drm/i915/dg2: Add forcewake table Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 26/50] drm/i915/dg2: Update LNCF steering ranges Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 27/50] drm/i915/dg2: Add SQIDI steering Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 28/50] drm/i915/dg2: Add new LRI reg offsets Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 29/50] drm/i915/dg2: Maintain backward-compatible nested batch behavior Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 30/50] drm/i915/dg2: Report INSTDONE_GEOM values in error state Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 31/50] drm/i915/dg2: Define MOCS table for DG2 Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 32/50] drm/i915/dg2: Add fake PCH Matt Roper
2021-07-16 19:52   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 33/50] drm/i915/dg2: Add cdclk table and reference clock Matt Roper
2021-07-16 19:36   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 34/50] drm/i915/dg2: Skip shared DPLL handling Matt Roper
2021-07-16 19:38   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 35/50] drm/i915/dg2: Don't wait for AUX power well enable ACKs Matt Roper
2021-07-16 19:40   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 36/50] drm/i915/dg2: Setup display outputs Matt Roper
2021-07-16 19:40   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 37/50] drm/i915/dg2: Add dbuf programming Matt Roper
2021-07-16 19:45   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 38/50] drm/i915/dg2: Don't program BW_BUDDY registers Matt Roper
2021-07-16 19:47   ` Souza, Jose
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 39/50] drm/i915/dg2: Don't read DRAM info Matt Roper
2021-07-15 17:17   ` Srivatsa, Anusha
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 40/50] drm/i915/dg2: DG2 has fixed memory bandwidth Matt Roper
2021-07-21 17:42   ` Srivatsa, Anusha
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 41/50] drm/i915/dg2: Add MPLLB programming for SNPS PHY Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 42/50] drm/i915/dg2: Add MPLLB programming for HDMI Matt Roper
2021-07-16 21:13   ` Matt Atwood
2021-07-14  3:15 ` Matt Roper [this message]
2021-07-16 21:38   ` [Intel-gfx] [PATCH v2 43/50] drm/i915/dg2: Add vswing programming for SNPS phys Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 44/50] drm/i915/dg2: Update modeset sequences Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 45/50] drm/i915/dg2: Classify DG2 PHY types Matt Roper
2021-07-16 20:50   ` Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 46/50] drm/i915/dg2: Wait for SNPS PHY calibration during display init Matt Roper
2021-07-16 20:52   ` Matt Atwood
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 47/50] drm/i915/dg2: Update lane disable power state during PSR Matt Roper
2021-07-21 17:55   ` Srivatsa, Anusha
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 48/50] drm/i915/dg2: Add DG2 to the PSR2 defeature list Matt Roper
2021-07-21 17:56   ` Srivatsa, Anusha
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 49/50] drm/i915/dg2: Update to bigjoiner path Matt Roper
2021-07-14  3:15 ` [Intel-gfx] [PATCH v2 50/50] drm/i915/dg2: Configure PCON in DP pre-enable path Matt Roper
2021-07-14  4:23 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Begin enabling Xe_HP SDV and DG2 platforms (rev5) Patchwork
2021-07-14  4:24 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-07-14  4:51 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-07-14 15:12 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork

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