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1 | /* |
2 | * Copyright © 2014-2016 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include "intel_drv.h" | |
25 | ||
26 | void chv_set_phy_signal_level(struct intel_encoder *encoder, | |
27 | u32 deemph_reg_value, u32 margin_reg_value, | |
28 | bool uniq_trans_scale) | |
29 | { | |
30 | struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); | |
31 | struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); | |
32 | struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc); | |
33 | enum dpio_channel ch = vlv_dport_to_channel(dport); | |
34 | enum pipe pipe = intel_crtc->pipe; | |
35 | u32 val; | |
36 | int i; | |
37 | ||
38 | mutex_lock(&dev_priv->sb_lock); | |
39 | ||
40 | /* Clear calc init */ | |
41 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch)); | |
42 | val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3); | |
43 | val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK); | |
44 | val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5; | |
45 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val); | |
46 | ||
47 | if (intel_crtc->config->lane_count > 2) { | |
48 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch)); | |
49 | val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3); | |
50 | val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK); | |
51 | val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5; | |
52 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); | |
53 | } | |
54 | ||
55 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch)); | |
56 | val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK); | |
57 | val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000; | |
58 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val); | |
59 | ||
60 | if (intel_crtc->config->lane_count > 2) { | |
61 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch)); | |
62 | val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK); | |
63 | val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000; | |
64 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val); | |
65 | } | |
66 | ||
67 | /* Program swing deemph */ | |
68 | for (i = 0; i < intel_crtc->config->lane_count; i++) { | |
69 | val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i)); | |
70 | val &= ~DPIO_SWING_DEEMPH9P5_MASK; | |
71 | val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT; | |
72 | vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val); | |
73 | } | |
74 | ||
75 | /* Program swing margin */ | |
76 | for (i = 0; i < intel_crtc->config->lane_count; i++) { | |
77 | val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i)); | |
78 | ||
79 | val &= ~DPIO_SWING_MARGIN000_MASK; | |
80 | val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT; | |
81 | ||
82 | /* | |
83 | * Supposedly this value shouldn't matter when unique transition | |
84 | * scale is disabled, but in fact it does matter. Let's just | |
85 | * always program the same value and hope it's OK. | |
86 | */ | |
87 | val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT); | |
88 | val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT; | |
89 | ||
90 | vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val); | |
91 | } | |
92 | ||
93 | /* | |
94 | * The document said it needs to set bit 27 for ch0 and bit 26 | |
95 | * for ch1. Might be a typo in the doc. | |
96 | * For now, for this unique transition scale selection, set bit | |
97 | * 27 for ch0 and ch1. | |
98 | */ | |
99 | for (i = 0; i < intel_crtc->config->lane_count; i++) { | |
100 | val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i)); | |
101 | if (uniq_trans_scale) | |
102 | val |= DPIO_TX_UNIQ_TRANS_SCALE_EN; | |
103 | else | |
104 | val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; | |
105 | vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val); | |
106 | } | |
107 | ||
108 | /* Start swing calculation */ | |
109 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch)); | |
110 | val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3; | |
111 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val); | |
112 | ||
113 | if (intel_crtc->config->lane_count > 2) { | |
114 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch)); | |
115 | val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3; | |
116 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); | |
117 | } | |
118 | ||
119 | mutex_unlock(&dev_priv->sb_lock); | |
120 | ||
121 | } | |
122 | ||
844b2f9a ACO |
123 | void chv_data_lane_soft_reset(struct intel_encoder *encoder, |
124 | bool reset) | |
125 | { | |
126 | struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); | |
127 | enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); | |
128 | struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); | |
129 | enum pipe pipe = crtc->pipe; | |
130 | uint32_t val; | |
131 | ||
132 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch)); | |
133 | if (reset) | |
134 | val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); | |
135 | else | |
136 | val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET; | |
137 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val); | |
138 | ||
139 | if (crtc->config->lane_count > 2) { | |
140 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch)); | |
141 | if (reset) | |
142 | val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET); | |
143 | else | |
144 | val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET; | |
145 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val); | |
146 | } | |
147 | ||
148 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch)); | |
149 | val |= CHV_PCS_REQ_SOFTRESET_EN; | |
150 | if (reset) | |
151 | val &= ~DPIO_PCS_CLK_SOFT_RESET; | |
152 | else | |
153 | val |= DPIO_PCS_CLK_SOFT_RESET; | |
154 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val); | |
155 | ||
156 | if (crtc->config->lane_count > 2) { | |
157 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch)); | |
158 | val |= CHV_PCS_REQ_SOFTRESET_EN; | |
159 | if (reset) | |
160 | val &= ~DPIO_PCS_CLK_SOFT_RESET; | |
161 | else | |
162 | val |= DPIO_PCS_CLK_SOFT_RESET; | |
163 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val); | |
164 | } | |
165 | } | |
419b1b7a ACO |
166 | |
167 | void chv_phy_pre_pll_enable(struct intel_encoder *encoder) | |
168 | { | |
169 | struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); | |
170 | struct drm_device *dev = encoder->base.dev; | |
171 | struct drm_i915_private *dev_priv = dev->dev_private; | |
172 | struct intel_crtc *intel_crtc = | |
173 | to_intel_crtc(encoder->base.crtc); | |
174 | enum dpio_channel ch = vlv_dport_to_channel(dport); | |
175 | enum pipe pipe = intel_crtc->pipe; | |
176 | unsigned int lane_mask = | |
177 | intel_dp_unused_lane_mask(intel_crtc->config->lane_count); | |
178 | u32 val; | |
179 | ||
180 | /* | |
181 | * Must trick the second common lane into life. | |
182 | * Otherwise we can't even access the PLL. | |
183 | */ | |
184 | if (ch == DPIO_CH0 && pipe == PIPE_B) | |
185 | dport->release_cl2_override = | |
186 | !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true); | |
187 | ||
188 | chv_phy_powergate_lanes(encoder, true, lane_mask); | |
189 | ||
190 | mutex_lock(&dev_priv->sb_lock); | |
191 | ||
192 | /* Assert data lane reset */ | |
193 | chv_data_lane_soft_reset(encoder, true); | |
194 | ||
195 | /* program left/right clock distribution */ | |
196 | if (pipe != PIPE_B) { | |
197 | val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0); | |
198 | val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK); | |
199 | if (ch == DPIO_CH0) | |
200 | val |= CHV_BUFLEFTENA1_FORCE; | |
201 | if (ch == DPIO_CH1) | |
202 | val |= CHV_BUFRIGHTENA1_FORCE; | |
203 | vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val); | |
204 | } else { | |
205 | val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1); | |
206 | val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK); | |
207 | if (ch == DPIO_CH0) | |
208 | val |= CHV_BUFLEFTENA2_FORCE; | |
209 | if (ch == DPIO_CH1) | |
210 | val |= CHV_BUFRIGHTENA2_FORCE; | |
211 | vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val); | |
212 | } | |
213 | ||
214 | /* program clock channel usage */ | |
215 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch)); | |
216 | val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE; | |
217 | if (pipe != PIPE_B) | |
218 | val &= ~CHV_PCS_USEDCLKCHANNEL; | |
219 | else | |
220 | val |= CHV_PCS_USEDCLKCHANNEL; | |
221 | vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val); | |
222 | ||
223 | if (intel_crtc->config->lane_count > 2) { | |
224 | val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch)); | |
225 | val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE; | |
226 | if (pipe != PIPE_B) | |
227 | val &= ~CHV_PCS_USEDCLKCHANNEL; | |
228 | else | |
229 | val |= CHV_PCS_USEDCLKCHANNEL; | |
230 | vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val); | |
231 | } | |
232 | ||
233 | /* | |
234 | * This a a bit weird since generally CL | |
235 | * matches the pipe, but here we need to | |
236 | * pick the CL based on the port. | |
237 | */ | |
238 | val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch)); | |
239 | if (pipe != PIPE_B) | |
240 | val &= ~CHV_CMN_USEDCLKCHANNEL; | |
241 | else | |
242 | val |= CHV_CMN_USEDCLKCHANNEL; | |
243 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val); | |
244 | ||
245 | mutex_unlock(&dev_priv->sb_lock); | |
246 | } |