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Rev | Author | Line No. | Line |
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3031 | serge | 1 | /* |
2 | * |
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3 | * Copyright (c) 2012 Gilles Dartiguelongue, Thomas Richter |
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4 | * |
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5 | * All Rights Reserved. |
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6 | * |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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8 | * copy of this software and associated documentation files (the |
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9 | * "Software"), to deal in the Software without restriction, including |
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10 | * without limitation the rights to use, copy, modify, merge, publish, |
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11 | * distribute, sub license, and/or sell copies of the Software, and to |
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12 | * permit persons to whom the Software is furnished to do so, subject to |
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13 | * the following conditions: |
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14 | * |
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15 | * The above copyright notice and this permission notice (including the |
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16 | * next paragraph) shall be included in all copies or substantial portions |
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17 | * of the Software. |
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18 | * |
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19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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23 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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24 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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25 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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26 | * |
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27 | */ |
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28 | |||
29 | #include "dvo.h" |
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30 | #include "i915_reg.h" |
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31 | #include "i915_drv.h" |
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32 | |||
33 | #define NS2501_VID 0x1305 |
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34 | #define NS2501_DID 0x6726 |
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35 | |||
36 | #define NS2501_VID_LO 0x00 |
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37 | #define NS2501_VID_HI 0x01 |
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38 | #define NS2501_DID_LO 0x02 |
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39 | #define NS2501_DID_HI 0x03 |
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40 | #define NS2501_REV 0x04 |
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41 | #define NS2501_RSVD 0x05 |
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42 | #define NS2501_FREQ_LO 0x06 |
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43 | #define NS2501_FREQ_HI 0x07 |
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44 | |||
45 | #define NS2501_REG8 0x08 |
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46 | #define NS2501_8_VEN (1<<5) |
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47 | #define NS2501_8_HEN (1<<4) |
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48 | #define NS2501_8_DSEL (1<<3) |
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49 | #define NS2501_8_BPAS (1<<2) |
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50 | #define NS2501_8_RSVD (1<<1) |
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51 | #define NS2501_8_PD (1<<0) |
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52 | |||
53 | #define NS2501_REG9 0x09 |
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54 | #define NS2501_9_VLOW (1<<7) |
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55 | #define NS2501_9_MSEL_MASK (0x7<<4) |
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56 | #define NS2501_9_TSEL (1<<3) |
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57 | #define NS2501_9_RSEN (1<<2) |
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58 | #define NS2501_9_RSVD (1<<1) |
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59 | #define NS2501_9_MDI (1<<0) |
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60 | |||
61 | #define NS2501_REGC 0x0c |
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62 | |||
63 | struct ns2501_priv { |
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64 | //I2CDevRec d; |
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65 | bool quiet; |
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66 | int reg_8_shadow; |
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67 | int reg_8_set; |
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68 | // Shadow registers for i915 |
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69 | int dvoc; |
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70 | int pll_a; |
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71 | int srcdim; |
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72 | int fw_blc; |
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73 | }; |
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74 | |||
75 | #define NSPTR(d) ((NS2501Ptr)(d->DriverPrivate.ptr)) |
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76 | |||
77 | /* |
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78 | * For reasons unclear to me, the ns2501 at least on the Fujitsu/Siemens |
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79 | * laptops does not react on the i2c bus unless |
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80 | * both the PLL is running and the display is configured in its native |
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81 | * resolution. |
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82 | * This function forces the DVO on, and stores the registers it touches. |
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83 | * Afterwards, registers are restored to regular values. |
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84 | * |
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85 | * This is pretty much a hack, though it works. |
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86 | * Without that, ns2501_readb and ns2501_writeb fail |
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87 | * when switching the resolution. |
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88 | */ |
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89 | |||
90 | /* |
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91 | ** Read a register from the ns2501. |
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92 | ** Returns true if successful, false otherwise. |
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93 | ** If it returns false, it might be wise to enable the |
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94 | ** DVO with the above function. |
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95 | */ |
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96 | static bool ns2501_readb(struct intel_dvo_device *dvo, int addr, uint8_t * ch) |
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97 | { |
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98 | struct ns2501_priv *ns = dvo->dev_priv; |
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99 | struct i2c_adapter *adapter = dvo->i2c_bus; |
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100 | u8 out_buf[2]; |
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101 | u8 in_buf[2]; |
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102 | |||
103 | struct i2c_msg msgs[] = { |
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104 | { |
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105 | .addr = dvo->slave_addr, |
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106 | .flags = 0, |
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107 | .len = 1, |
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108 | .buf = out_buf, |
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109 | }, |
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110 | { |
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111 | .addr = dvo->slave_addr, |
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112 | .flags = I2C_M_RD, |
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113 | .len = 1, |
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114 | .buf = in_buf, |
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115 | } |
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116 | }; |
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117 | |||
118 | out_buf[0] = addr; |
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119 | out_buf[1] = 0; |
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120 | |||
121 | if (i2c_transfer(adapter, msgs, 2) == 2) { |
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122 | *ch = in_buf[0]; |
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123 | return true; |
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124 | }; |
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125 | |||
126 | if (!ns->quiet) { |
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127 | DRM_DEBUG_KMS |
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128 | ("Unable to read register 0x%02x from %s:0x%02x.\n", addr, |
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129 | adapter->name, dvo->slave_addr); |
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130 | } |
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131 | |||
132 | return false; |
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133 | } |
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134 | |||
135 | /* |
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136 | ** Write a register to the ns2501. |
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137 | ** Returns true if successful, false otherwise. |
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138 | ** If it returns false, it might be wise to enable the |
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139 | ** DVO with the above function. |
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140 | */ |
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141 | static bool ns2501_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) |
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142 | { |
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143 | struct ns2501_priv *ns = dvo->dev_priv; |
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144 | struct i2c_adapter *adapter = dvo->i2c_bus; |
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145 | uint8_t out_buf[2]; |
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146 | |||
147 | struct i2c_msg msg = { |
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148 | .addr = dvo->slave_addr, |
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149 | .flags = 0, |
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150 | .len = 2, |
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151 | .buf = out_buf, |
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152 | }; |
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153 | |||
154 | out_buf[0] = addr; |
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155 | out_buf[1] = ch; |
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156 | |||
157 | if (i2c_transfer(adapter, &msg, 1) == 1) { |
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158 | return true; |
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159 | } |
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160 | |||
161 | if (!ns->quiet) { |
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162 | DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d\n", |
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163 | addr, adapter->name, dvo->slave_addr); |
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164 | } |
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165 | |||
166 | return false; |
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167 | } |
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168 | |||
169 | /* National Semiconductor 2501 driver for chip on i2c bus |
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170 | * scan for the chip on the bus. |
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171 | * Hope the VBIOS initialized the PLL correctly so we can |
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172 | * talk to it. If not, it will not be seen and not detected. |
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173 | * Bummer! |
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174 | */ |
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175 | static bool ns2501_init(struct intel_dvo_device *dvo, |
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176 | struct i2c_adapter *adapter) |
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177 | { |
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178 | /* this will detect the NS2501 chip on the specified i2c bus */ |
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179 | struct ns2501_priv *ns; |
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180 | unsigned char ch; |
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181 | |||
182 | ns = kzalloc(sizeof(struct ns2501_priv), GFP_KERNEL); |
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183 | if (ns == NULL) |
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184 | return false; |
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185 | |||
186 | dvo->i2c_bus = adapter; |
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187 | dvo->dev_priv = ns; |
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188 | ns->quiet = true; |
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189 | |||
190 | if (!ns2501_readb(dvo, NS2501_VID_LO, &ch)) |
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191 | goto out; |
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192 | |||
193 | if (ch != (NS2501_VID & 0xff)) { |
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194 | DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n", |
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195 | ch, adapter->name, dvo->slave_addr); |
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196 | goto out; |
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197 | } |
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198 | |||
199 | if (!ns2501_readb(dvo, NS2501_DID_LO, &ch)) |
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200 | goto out; |
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201 | |||
202 | if (ch != (NS2501_DID & 0xff)) { |
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203 | DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n", |
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204 | ch, adapter->name, dvo->slave_addr); |
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205 | goto out; |
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206 | } |
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207 | ns->quiet = false; |
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208 | ns->reg_8_set = 0; |
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209 | ns->reg_8_shadow = |
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210 | NS2501_8_PD | NS2501_8_BPAS | NS2501_8_VEN | NS2501_8_HEN; |
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211 | |||
212 | DRM_DEBUG_KMS("init ns2501 dvo controller successfully!\n"); |
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213 | return true; |
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214 | |||
215 | out: |
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216 | kfree(ns); |
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217 | return false; |
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218 | } |
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219 | |||
220 | static enum drm_connector_status ns2501_detect(struct intel_dvo_device *dvo) |
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221 | { |
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222 | /* |
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223 | * This is a Laptop display, it doesn't have hotplugging. |
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224 | * Even if not, the detection bit of the 2501 is unreliable as |
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225 | * it only works for some display types. |
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226 | * It is even more unreliable as the PLL must be active for |
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227 | * allowing reading from the chiop. |
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228 | */ |
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229 | return connector_status_connected; |
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230 | } |
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231 | |||
232 | static enum drm_mode_status ns2501_mode_valid(struct intel_dvo_device *dvo, |
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233 | struct drm_display_mode *mode) |
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234 | { |
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235 | DRM_DEBUG_KMS |
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236 | ("%s: is mode valid (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d)\n", |
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237 | __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay, |
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238 | mode->vtotal); |
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239 | |||
240 | /* |
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241 | * Currently, these are all the modes I have data from. |
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242 | * More might exist. Unclear how to find the native resolution |
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243 | * of the panel in here so we could always accept it |
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244 | * by disabling the scaler. |
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245 | */ |
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246 | if ((mode->hdisplay == 800 && mode->vdisplay == 600) || |
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247 | (mode->hdisplay == 640 && mode->vdisplay == 480) || |
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248 | (mode->hdisplay == 1024 && mode->vdisplay == 768)) { |
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249 | return MODE_OK; |
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250 | } else { |
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251 | return MODE_ONE_SIZE; /* Is this a reasonable error? */ |
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252 | } |
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253 | } |
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254 | |||
255 | static void ns2501_mode_set(struct intel_dvo_device *dvo, |
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256 | struct drm_display_mode *mode, |
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257 | struct drm_display_mode *adjusted_mode) |
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258 | { |
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259 | bool ok; |
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4560 | Serge | 260 | int retries = 10; |
3031 | serge | 261 | struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv); |
262 | |||
263 | DRM_DEBUG_KMS |
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264 | ("%s: set mode (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d).\n", |
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265 | __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay, |
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266 | mode->vtotal); |
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267 | |||
268 | /* |
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269 | * Where do I find the native resolution for which scaling is not required??? |
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270 | * |
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271 | * First trigger the DVO on as otherwise the chip does not appear on the i2c |
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272 | * bus. |
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273 | */ |
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274 | do { |
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275 | ok = true; |
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276 | |||
277 | if (mode->hdisplay == 800 && mode->vdisplay == 600) { |
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278 | /* mode 277 */ |
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279 | ns->reg_8_shadow &= ~NS2501_8_BPAS; |
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280 | DRM_DEBUG_KMS("%s: switching to 800x600\n", |
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281 | __FUNCTION__); |
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282 | |||
283 | /* |
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284 | * No, I do not know where this data comes from. |
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285 | * It is just what the video bios left in the DVO, so |
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286 | * I'm just copying it here over. |
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287 | * This also means that I cannot support any other modes |
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288 | * except the ones supported by the bios. |
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289 | */ |
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290 | ok &= ns2501_writeb(dvo, 0x11, 0xc8); // 0xc7 also works. |
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291 | ok &= ns2501_writeb(dvo, 0x1b, 0x19); |
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292 | ok &= ns2501_writeb(dvo, 0x1c, 0x62); // VBIOS left 0x64 here, but 0x62 works nicer |
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293 | ok &= ns2501_writeb(dvo, 0x1d, 0x02); |
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294 | |||
295 | ok &= ns2501_writeb(dvo, 0x34, 0x03); |
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296 | ok &= ns2501_writeb(dvo, 0x35, 0xff); |
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297 | |||
298 | ok &= ns2501_writeb(dvo, 0x80, 0x27); |
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299 | ok &= ns2501_writeb(dvo, 0x81, 0x03); |
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300 | ok &= ns2501_writeb(dvo, 0x82, 0x41); |
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301 | ok &= ns2501_writeb(dvo, 0x83, 0x05); |
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302 | |||
303 | ok &= ns2501_writeb(dvo, 0x8d, 0x02); |
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304 | ok &= ns2501_writeb(dvo, 0x8e, 0x04); |
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305 | ok &= ns2501_writeb(dvo, 0x8f, 0x00); |
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306 | |||
307 | ok &= ns2501_writeb(dvo, 0x90, 0xfe); /* vertical. VBIOS left 0xff here, but 0xfe works better */ |
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308 | ok &= ns2501_writeb(dvo, 0x91, 0x07); |
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309 | ok &= ns2501_writeb(dvo, 0x94, 0x00); |
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310 | ok &= ns2501_writeb(dvo, 0x95, 0x00); |
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311 | |||
312 | ok &= ns2501_writeb(dvo, 0x96, 0x00); |
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313 | |||
314 | ok &= ns2501_writeb(dvo, 0x99, 0x00); |
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315 | ok &= ns2501_writeb(dvo, 0x9a, 0x88); |
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316 | |||
317 | ok &= ns2501_writeb(dvo, 0x9c, 0x23); /* Looks like first and last line of the image. */ |
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318 | ok &= ns2501_writeb(dvo, 0x9d, 0x00); |
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319 | ok &= ns2501_writeb(dvo, 0x9e, 0x25); |
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320 | ok &= ns2501_writeb(dvo, 0x9f, 0x03); |
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321 | |||
322 | ok &= ns2501_writeb(dvo, 0xa4, 0x80); |
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323 | |||
324 | ok &= ns2501_writeb(dvo, 0xb6, 0x00); |
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325 | |||
326 | ok &= ns2501_writeb(dvo, 0xb9, 0xc8); /* horizontal? */ |
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327 | ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */ |
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328 | |||
329 | ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */ |
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330 | ok &= ns2501_writeb(dvo, 0xc1, 0xd7); |
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331 | |||
332 | ok &= ns2501_writeb(dvo, 0xc2, 0x00); |
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333 | ok &= ns2501_writeb(dvo, 0xc3, 0xf8); |
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334 | |||
335 | ok &= ns2501_writeb(dvo, 0xc4, 0x03); |
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336 | ok &= ns2501_writeb(dvo, 0xc5, 0x1a); |
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337 | |||
338 | ok &= ns2501_writeb(dvo, 0xc6, 0x00); |
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339 | ok &= ns2501_writeb(dvo, 0xc7, 0x73); |
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340 | ok &= ns2501_writeb(dvo, 0xc8, 0x02); |
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341 | |||
342 | } else if (mode->hdisplay == 640 && mode->vdisplay == 480) { |
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343 | /* mode 274 */ |
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344 | DRM_DEBUG_KMS("%s: switching to 640x480\n", |
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345 | __FUNCTION__); |
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346 | /* |
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347 | * No, I do not know where this data comes from. |
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348 | * It is just what the video bios left in the DVO, so |
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349 | * I'm just copying it here over. |
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350 | * This also means that I cannot support any other modes |
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351 | * except the ones supported by the bios. |
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352 | */ |
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353 | ns->reg_8_shadow &= ~NS2501_8_BPAS; |
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354 | |||
355 | ok &= ns2501_writeb(dvo, 0x11, 0xa0); |
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356 | ok &= ns2501_writeb(dvo, 0x1b, 0x11); |
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357 | ok &= ns2501_writeb(dvo, 0x1c, 0x54); |
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358 | ok &= ns2501_writeb(dvo, 0x1d, 0x03); |
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359 | |||
360 | ok &= ns2501_writeb(dvo, 0x34, 0x03); |
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361 | ok &= ns2501_writeb(dvo, 0x35, 0xff); |
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362 | |||
363 | ok &= ns2501_writeb(dvo, 0x80, 0xff); |
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364 | ok &= ns2501_writeb(dvo, 0x81, 0x07); |
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365 | ok &= ns2501_writeb(dvo, 0x82, 0x3d); |
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366 | ok &= ns2501_writeb(dvo, 0x83, 0x05); |
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367 | |||
368 | ok &= ns2501_writeb(dvo, 0x8d, 0x02); |
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369 | ok &= ns2501_writeb(dvo, 0x8e, 0x10); |
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370 | ok &= ns2501_writeb(dvo, 0x8f, 0x00); |
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371 | |||
372 | ok &= ns2501_writeb(dvo, 0x90, 0xff); /* vertical */ |
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373 | ok &= ns2501_writeb(dvo, 0x91, 0x07); |
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374 | ok &= ns2501_writeb(dvo, 0x94, 0x00); |
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375 | ok &= ns2501_writeb(dvo, 0x95, 0x00); |
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376 | |||
377 | ok &= ns2501_writeb(dvo, 0x96, 0x05); |
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378 | |||
379 | ok &= ns2501_writeb(dvo, 0x99, 0x00); |
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380 | ok &= ns2501_writeb(dvo, 0x9a, 0x88); |
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381 | |||
382 | ok &= ns2501_writeb(dvo, 0x9c, 0x24); |
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383 | ok &= ns2501_writeb(dvo, 0x9d, 0x00); |
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384 | ok &= ns2501_writeb(dvo, 0x9e, 0x25); |
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385 | ok &= ns2501_writeb(dvo, 0x9f, 0x03); |
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386 | |||
387 | ok &= ns2501_writeb(dvo, 0xa4, 0x84); |
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388 | |||
389 | ok &= ns2501_writeb(dvo, 0xb6, 0x09); |
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390 | |||
391 | ok &= ns2501_writeb(dvo, 0xb9, 0xa0); /* horizontal? */ |
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392 | ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */ |
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393 | |||
394 | ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */ |
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395 | ok &= ns2501_writeb(dvo, 0xc1, 0x90); |
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396 | |||
397 | ok &= ns2501_writeb(dvo, 0xc2, 0x00); |
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398 | ok &= ns2501_writeb(dvo, 0xc3, 0x0f); |
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399 | |||
400 | ok &= ns2501_writeb(dvo, 0xc4, 0x03); |
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401 | ok &= ns2501_writeb(dvo, 0xc5, 0x16); |
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402 | |||
403 | ok &= ns2501_writeb(dvo, 0xc6, 0x00); |
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404 | ok &= ns2501_writeb(dvo, 0xc7, 0x02); |
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405 | ok &= ns2501_writeb(dvo, 0xc8, 0x02); |
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406 | |||
407 | } else if (mode->hdisplay == 1024 && mode->vdisplay == 768) { |
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408 | /* mode 280 */ |
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409 | DRM_DEBUG_KMS("%s: switching to 1024x768\n", |
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410 | __FUNCTION__); |
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411 | /* |
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412 | * This might or might not work, actually. I'm silently |
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413 | * assuming here that the native panel resolution is |
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414 | * 1024x768. If not, then this leaves the scaler disabled |
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415 | * generating a picture that is likely not the expected. |
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416 | * |
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417 | * Problem is that I do not know where to take the panel |
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418 | * dimensions from. |
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419 | * |
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420 | * Enable the bypass, scaling not required. |
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421 | * |
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422 | * The scaler registers are irrelevant here.... |
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423 | * |
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424 | */ |
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425 | ns->reg_8_shadow |= NS2501_8_BPAS; |
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426 | ok &= ns2501_writeb(dvo, 0x37, 0x44); |
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427 | } else { |
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428 | /* |
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429 | * Data not known. Bummer! |
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430 | * Hopefully, the code should not go here |
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431 | * as mode_OK delivered no other modes. |
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432 | */ |
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433 | ns->reg_8_shadow |= NS2501_8_BPAS; |
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434 | } |
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435 | ok &= ns2501_writeb(dvo, NS2501_REG8, ns->reg_8_shadow); |
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4560 | Serge | 436 | } while (!ok && retries--); |
3031 | serge | 437 | } |
438 | |||
439 | /* set the NS2501 power state */ |
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440 | static bool ns2501_get_hw_state(struct intel_dvo_device *dvo) |
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441 | { |
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442 | unsigned char ch; |
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443 | |||
444 | if (!ns2501_readb(dvo, NS2501_REG8, &ch)) |
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445 | return false; |
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446 | |||
447 | if (ch & NS2501_8_PD) |
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448 | return true; |
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449 | else |
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450 | return false; |
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451 | } |
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452 | |||
453 | /* set the NS2501 power state */ |
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454 | static void ns2501_dpms(struct intel_dvo_device *dvo, bool enable) |
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455 | { |
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456 | bool ok; |
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4560 | Serge | 457 | int retries = 10; |
3031 | serge | 458 | struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv); |
459 | unsigned char ch; |
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460 | |||
461 | DRM_DEBUG_KMS("%s: Trying set the dpms of the DVO to %i\n", |
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462 | __FUNCTION__, enable); |
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463 | |||
464 | ch = ns->reg_8_shadow; |
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465 | |||
466 | if (enable) |
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467 | ch |= NS2501_8_PD; |
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468 | else |
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469 | ch &= ~NS2501_8_PD; |
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470 | |||
471 | if (ns->reg_8_set == 0 || ns->reg_8_shadow != ch) { |
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472 | ns->reg_8_set = 1; |
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473 | ns->reg_8_shadow = ch; |
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474 | |||
475 | do { |
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476 | ok = true; |
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477 | ok &= ns2501_writeb(dvo, NS2501_REG8, ch); |
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478 | ok &= |
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479 | ns2501_writeb(dvo, 0x34, |
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480 | enable ? 0x03 : 0x00); |
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481 | ok &= |
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482 | ns2501_writeb(dvo, 0x35, |
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483 | enable ? 0xff : 0x00); |
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4560 | Serge | 484 | } while (!ok && retries--); |
3031 | serge | 485 | } |
486 | } |
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487 | |||
488 | static void ns2501_dump_regs(struct intel_dvo_device *dvo) |
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489 | { |
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490 | uint8_t val; |
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491 | |||
492 | ns2501_readb(dvo, NS2501_FREQ_LO, &val); |
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493 | DRM_LOG_KMS("NS2501_FREQ_LO: 0x%02x\n", val); |
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494 | ns2501_readb(dvo, NS2501_FREQ_HI, &val); |
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495 | DRM_LOG_KMS("NS2501_FREQ_HI: 0x%02x\n", val); |
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496 | ns2501_readb(dvo, NS2501_REG8, &val); |
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497 | DRM_LOG_KMS("NS2501_REG8: 0x%02x\n", val); |
||
498 | ns2501_readb(dvo, NS2501_REG9, &val); |
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499 | DRM_LOG_KMS("NS2501_REG9: 0x%02x\n", val); |
||
500 | ns2501_readb(dvo, NS2501_REGC, &val); |
||
501 | DRM_LOG_KMS("NS2501_REGC: 0x%02x\n", val); |
||
502 | } |
||
503 | |||
504 | static void ns2501_destroy(struct intel_dvo_device *dvo) |
||
505 | { |
||
506 | struct ns2501_priv *ns = dvo->dev_priv; |
||
507 | |||
508 | if (ns) { |
||
509 | kfree(ns); |
||
510 | dvo->dev_priv = NULL; |
||
511 | } |
||
512 | } |
||
513 | |||
514 | struct intel_dvo_dev_ops ns2501_ops = { |
||
515 | .init = ns2501_init, |
||
516 | .detect = ns2501_detect, |
||
517 | .mode_valid = ns2501_mode_valid, |
||
518 | .mode_set = ns2501_mode_set, |
||
519 | .dpms = ns2501_dpms, |
||
520 | .get_hw_state = ns2501_get_hw_state, |
||
521 | .dump_regs = ns2501_dump_regs, |
||
522 | .destroy = ns2501_destroy, |
||
523 | };0) |