Commit b7fa22d8 authored by Ander Conselvan de Oliveira's avatar Ander Conselvan de Oliveira
Browse files

drm/i915: Unduplicate CHV signal level code 



The code for programming voltage swing and emphasis was duplicated
between DP and HDMI code. Move that to a new file, intel_dpio_phy.c.

v2: Keep the "Use 800mV-0dB" comment in the HDMI code. (Ville)
Signed-off-by: default avatarAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: default avatarJim Bride <jim.bride@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461761065-21195-3-git-send-email-ander.conselvan.de.oliveira@intel.com
parent d4d6279a

drivers/gpu/drm/i915/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ i915-y += intel_audio.o \ 
	  intel_bios.o \

	  intel_color.o \

	  intel_display.o \

	  intel_dpio_phy.o \

	  intel_dpll_mgr.o \

	  intel_fbc.o \

	  intel_fifo_underrun.o \

drivers/gpu/drm/i915/i915_drv.h

+5 −0
Original line number Diff line number Diff line
@@ -3589,6 +3589,11 @@ void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value, 
u32 vlv_flisdsi_read(struct drm_i915_private *dev_priv, u32 reg);

void vlv_flisdsi_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);



/* intel_dpio_phy.c */

void chv_set_phy_signal_level(struct intel_encoder *encoder,

			      u32 deemph_reg_value, u32 margin_reg_value,

			      bool uniq_trans_scale);



int intel_gpu_freq(struct drm_i915_private *dev_priv, int val);

int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);

drivers/gpu/drm/i915/intel_dp.c

+6 −97
Original line number Diff line number Diff line
@@ -3309,23 +3309,12 @@ static uint32_t vlv_signal_levels(struct intel_dp *intel_dp) 
	return 0;

}



static bool chv_need_uniq_trans_scale(uint8_t train_set)

{

	return (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) == DP_TRAIN_PRE_EMPH_LEVEL_0 &&

		(train_set & DP_TRAIN_VOLTAGE_SWING_MASK) == DP_TRAIN_VOLTAGE_SWING_LEVEL_3;

}



static uint32_t chv_signal_levels(struct intel_dp *intel_dp)

{

	struct drm_device *dev = intel_dp_to_dev(intel_dp);

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);

	struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);

	u32 deemph_reg_value, margin_reg_value, val;

	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;

	u32 deemph_reg_value, margin_reg_value;

	bool uniq_trans_scale = false;

	uint8_t train_set = intel_dp->train_set[0];

	enum dpio_channel ch = vlv_dport_to_channel(dport);

	enum pipe pipe = intel_crtc->pipe;

	int i;



	switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {

	case DP_TRAIN_PRE_EMPH_LEVEL_0:
@@ -3345,7 +3334,7 @@ static uint32_t chv_signal_levels(struct intel_dp *intel_dp) 
		case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:

			deemph_reg_value = 128;

			margin_reg_value = 154;

			/* FIXME extra to set for 1200 */

			uniq_trans_scale = true;

			break;

		default:

			return 0;
@@ -3397,88 +3386,8 @@ static uint32_t chv_signal_levels(struct intel_dp *intel_dp) 
		return 0;

	}



	mutex_lock(&dev_priv->sb_lock);



	/* Clear calc init */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

	val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

	val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

		val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

		val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

		val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);

	}



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));

	val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

	val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));

		val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

		val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);

	}



	/* Program swing deemph */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));

		val &= ~DPIO_SWING_DEEMPH9P5_MASK;

		val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);

	}



	/* Program swing margin */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));



		val &= ~DPIO_SWING_MARGIN000_MASK;

		val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;



		/*

		 * Supposedly this value shouldn't matter when unique transition

		 * scale is disabled, but in fact it does matter. Let's just

		 * always program the same value and hope it's OK.

		 */

		val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);

		val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;



		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);

	}



	/*

	 * The document said it needs to set bit 27 for ch0 and bit 26

	 * for ch1. Might be a typo in the doc.

	 * For now, for this unique transition scale selection, set bit

	 * 27 for ch0 and ch1.

	 */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));

		if (chv_need_uniq_trans_scale(train_set))

			val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;

		else

			val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);

	}



	/* Start swing calculation */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

		val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);

	}



	mutex_unlock(&dev_priv->sb_lock);

	chv_set_phy_signal_level(encoder, deemph_reg_value,

				 margin_reg_value, uniq_trans_scale);



	return 0;

}

drivers/gpu/drm/i915/intel_dpio_phy.c

0 → 100644
+122 −0
Original line number Diff line number Diff line 
/*

 * Copyright © 2014-2016 Intel Corporation

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 */



#include "intel_drv.h"



void chv_set_phy_signal_level(struct intel_encoder *encoder,

			      u32 deemph_reg_value, u32 margin_reg_value,

			      bool uniq_trans_scale)

{

	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);

	struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);

	enum dpio_channel ch = vlv_dport_to_channel(dport);

	enum pipe pipe = intel_crtc->pipe;

	u32 val;

	int i;



	mutex_lock(&dev_priv->sb_lock);



	/* Clear calc init */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

	val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

	val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

		val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

		val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

		val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);

	}



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));

	val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

	val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));

		val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

		val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);

	}



	/* Program swing deemph */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));

		val &= ~DPIO_SWING_DEEMPH9P5_MASK;

		val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);

	}



	/* Program swing margin */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));



		val &= ~DPIO_SWING_MARGIN000_MASK;

		val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;



		/*

		 * Supposedly this value shouldn't matter when unique transition

		 * scale is disabled, but in fact it does matter. Let's just

		 * always program the same value and hope it's OK.

		 */

		val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);

		val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;



		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);

	}



	/*

	 * The document said it needs to set bit 27 for ch0 and bit 26

	 * for ch1. Might be a typo in the doc.

	 * For now, for this unique transition scale selection, set bit

	 * 27 for ch0 and ch1.

	 */

	for (i = 0; i < intel_crtc->config->lane_count; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));

		if (uniq_trans_scale)

			val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;

		else

			val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);

	}



	/* Start swing calculation */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	if (intel_crtc->config->lane_count > 2) {

		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

		val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);

	}



	mutex_unlock(&dev_priv->sb_lock);



}

drivers/gpu/drm/i915/intel_hdmi.c

+2 −68
Original line number Diff line number Diff line
@@ -1921,77 +1921,11 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder) 
	/* Deassert data lane reset */

	chv_data_lane_soft_reset(encoder, false);



	/* Clear calc init */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

	val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

	val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

	val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);

	val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);

	val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));

	val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

	val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));

	val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);

	val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);

	mutex_unlock(&dev_priv->sb_lock);



	/* FIXME: Program the support xxx V-dB */

	/* Use 800mV-0dB */

	for (i = 0; i < 4; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));

		val &= ~DPIO_SWING_DEEMPH9P5_MASK;

		val |= 128 << DPIO_SWING_DEEMPH9P5_SHIFT;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);

	}



	for (i = 0; i < 4; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));



		val &= ~DPIO_SWING_MARGIN000_MASK;

		val |= 102 << DPIO_SWING_MARGIN000_SHIFT;



		/*

		 * Supposedly this value shouldn't matter when unique transition

		 * scale is disabled, but in fact it does matter. Let's just

		 * always program the same value and hope it's OK.

		 */

		val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);

		val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;



		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);

	}



	/*

	 * The document said it needs to set bit 27 for ch0 and bit 26

	 * for ch1. Might be a typo in the doc.

	 * For now, for this unique transition scale selection, set bit

	 * 27 for ch0 and ch1.

	 */

	for (i = 0; i < 4; i++) {

		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));

		val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;

		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);

	}



	/* Start swing calculation */

	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));

	val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);



	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));

	val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;

	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);



	mutex_unlock(&dev_priv->sb_lock);

	chv_set_phy_signal_level(encoder, 128, 102, false);



	intel_hdmi->set_infoframes(&encoder->base,

				   intel_crtc->config->has_hdmi_sink,

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