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Rev | Author | Line No. | Line |
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6084 | serge | 1 | /* |
2 | * MIPI DSI Bus |
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3 | * |
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4 | * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd. |
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5 | * Andrzej Hajda |
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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 OR |
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20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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21 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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22 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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23 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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24 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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25 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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26 | */ |
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27 | |||
28 | #include |
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29 | |||
30 | #include |
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31 | #include |
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32 | //#include |
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33 | #include |
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6088 | serge | 34 | #include |
6084 | serge | 35 | |
36 | #include |
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37 | |||
38 | |||
39 | /** |
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40 | * mipi_dsi_attach - attach a DSI device to its DSI host |
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41 | * @dsi: DSI peripheral |
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42 | */ |
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43 | int mipi_dsi_attach(struct mipi_dsi_device *dsi) |
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44 | { |
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45 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; |
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46 | |||
47 | if (!ops || !ops->attach) |
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48 | return -ENOSYS; |
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49 | |||
50 | return ops->attach(dsi->host, dsi); |
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51 | } |
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52 | EXPORT_SYMBOL(mipi_dsi_attach); |
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53 | |||
54 | static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi, |
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55 | struct mipi_dsi_msg *msg) |
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56 | { |
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57 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; |
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58 | |||
59 | if (!ops || !ops->transfer) |
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60 | return -ENOSYS; |
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61 | |||
62 | if (dsi->mode_flags & MIPI_DSI_MODE_LPM) |
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63 | msg->flags |= MIPI_DSI_MSG_USE_LPM; |
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64 | |||
65 | return ops->transfer(dsi->host, msg); |
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66 | } |
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67 | |||
68 | /** |
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69 | * mipi_dsi_packet_format_is_short - check if a packet is of the short format |
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70 | * @type: MIPI DSI data type of the packet |
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71 | * |
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72 | * Return: true if the packet for the given data type is a short packet, false |
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73 | * otherwise. |
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74 | */ |
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75 | bool mipi_dsi_packet_format_is_short(u8 type) |
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76 | { |
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77 | switch (type) { |
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78 | case MIPI_DSI_V_SYNC_START: |
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79 | case MIPI_DSI_V_SYNC_END: |
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80 | case MIPI_DSI_H_SYNC_START: |
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81 | case MIPI_DSI_H_SYNC_END: |
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82 | case MIPI_DSI_END_OF_TRANSMISSION: |
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83 | case MIPI_DSI_COLOR_MODE_OFF: |
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84 | case MIPI_DSI_COLOR_MODE_ON: |
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85 | case MIPI_DSI_SHUTDOWN_PERIPHERAL: |
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86 | case MIPI_DSI_TURN_ON_PERIPHERAL: |
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87 | case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: |
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88 | case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: |
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89 | case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: |
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90 | case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: |
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91 | case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: |
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92 | case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: |
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93 | case MIPI_DSI_DCS_SHORT_WRITE: |
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94 | case MIPI_DSI_DCS_SHORT_WRITE_PARAM: |
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95 | case MIPI_DSI_DCS_READ: |
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96 | case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE: |
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97 | return true; |
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98 | } |
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99 | |||
100 | return false; |
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101 | } |
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102 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_short); |
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103 | |||
104 | /** |
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105 | * mipi_dsi_packet_format_is_long - check if a packet is of the long format |
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106 | * @type: MIPI DSI data type of the packet |
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107 | * |
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108 | * Return: true if the packet for the given data type is a long packet, false |
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109 | * otherwise. |
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110 | */ |
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111 | bool mipi_dsi_packet_format_is_long(u8 type) |
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112 | { |
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113 | switch (type) { |
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114 | case MIPI_DSI_NULL_PACKET: |
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115 | case MIPI_DSI_BLANKING_PACKET: |
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116 | case MIPI_DSI_GENERIC_LONG_WRITE: |
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117 | case MIPI_DSI_DCS_LONG_WRITE: |
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118 | case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20: |
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119 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24: |
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120 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16: |
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121 | case MIPI_DSI_PACKED_PIXEL_STREAM_30: |
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122 | case MIPI_DSI_PACKED_PIXEL_STREAM_36: |
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123 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12: |
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124 | case MIPI_DSI_PACKED_PIXEL_STREAM_16: |
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125 | case MIPI_DSI_PACKED_PIXEL_STREAM_18: |
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126 | case MIPI_DSI_PIXEL_STREAM_3BYTE_18: |
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127 | case MIPI_DSI_PACKED_PIXEL_STREAM_24: |
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128 | return true; |
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129 | } |
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130 | |||
131 | return false; |
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132 | } |
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133 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_long); |
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134 | |||
135 | /** |
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136 | * mipi_dsi_create_packet - create a packet from a message according to the |
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137 | * DSI protocol |
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138 | * @packet: pointer to a DSI packet structure |
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139 | * @msg: message to translate into a packet |
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140 | * |
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141 | * Return: 0 on success or a negative error code on failure. |
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142 | */ |
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143 | int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, |
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144 | const struct mipi_dsi_msg *msg) |
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145 | { |
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146 | if (!packet || !msg) |
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147 | return -EINVAL; |
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148 | |||
149 | /* do some minimum sanity checking */ |
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150 | if (!mipi_dsi_packet_format_is_short(msg->type) && |
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151 | !mipi_dsi_packet_format_is_long(msg->type)) |
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152 | return -EINVAL; |
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153 | |||
154 | if (msg->channel > 3) |
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155 | return -EINVAL; |
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156 | |||
157 | memset(packet, 0, sizeof(*packet)); |
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158 | packet->header[0] = ((msg->channel & 0x3) << 6) | (msg->type & 0x3f); |
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159 | |||
160 | /* TODO: compute ECC if hardware support is not available */ |
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161 | |||
162 | /* |
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163 | * Long write packets contain the word count in header bytes 1 and 2. |
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164 | * The payload follows the header and is word count bytes long. |
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165 | * |
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166 | * Short write packets encode up to two parameters in header bytes 1 |
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167 | * and 2. |
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168 | */ |
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169 | if (mipi_dsi_packet_format_is_long(msg->type)) { |
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170 | packet->header[1] = (msg->tx_len >> 0) & 0xff; |
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171 | packet->header[2] = (msg->tx_len >> 8) & 0xff; |
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172 | |||
173 | packet->payload_length = msg->tx_len; |
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174 | packet->payload = msg->tx_buf; |
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175 | } else { |
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176 | const u8 *tx = msg->tx_buf; |
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177 | |||
178 | packet->header[1] = (msg->tx_len > 0) ? tx[0] : 0; |
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179 | packet->header[2] = (msg->tx_len > 1) ? tx[1] : 0; |
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180 | } |
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181 | |||
182 | packet->size = sizeof(packet->header) + packet->payload_length; |
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183 | |||
184 | return 0; |
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185 | } |
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186 | EXPORT_SYMBOL(mipi_dsi_create_packet); |
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187 | |||
7144 | serge | 188 | /** |
189 | * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command |
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190 | * @dsi: DSI peripheral device |
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191 | * |
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192 | * Return: 0 on success or a negative error code on failure. |
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193 | */ |
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194 | int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi) |
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195 | { |
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196 | struct mipi_dsi_msg msg = { |
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197 | .channel = dsi->channel, |
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198 | .type = MIPI_DSI_SHUTDOWN_PERIPHERAL, |
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199 | .tx_buf = (u8 [2]) { 0, 0 }, |
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200 | .tx_len = 2, |
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201 | }; |
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202 | |||
203 | return mipi_dsi_device_transfer(dsi, &msg); |
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204 | } |
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205 | EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral); |
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206 | |||
207 | /** |
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208 | * mipi_dsi_turn_on_peripheral() - sends a Turn On Peripheral command |
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209 | * @dsi: DSI peripheral device |
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210 | * |
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211 | * Return: 0 on success or a negative error code on failure. |
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212 | */ |
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213 | int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi) |
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214 | { |
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215 | struct mipi_dsi_msg msg = { |
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216 | .channel = dsi->channel, |
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217 | .type = MIPI_DSI_TURN_ON_PERIPHERAL, |
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218 | .tx_buf = (u8 [2]) { 0, 0 }, |
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219 | .tx_len = 2, |
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220 | }; |
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221 | |||
222 | return mipi_dsi_device_transfer(dsi, &msg); |
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223 | } |
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224 | EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral); |
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225 | |||
6084 | serge | 226 | /* |
227 | * mipi_dsi_set_maximum_return_packet_size() - specify the maximum size of the |
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228 | * the payload in a long packet transmitted from the peripheral back to the |
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229 | * host processor |
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230 | * @dsi: DSI peripheral device |
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231 | * @value: the maximum size of the payload |
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232 | * |
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233 | * Return: 0 on success or a negative error code on failure. |
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234 | */ |
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235 | int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, |
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236 | u16 value) |
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237 | { |
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238 | u8 tx[2] = { value & 0xff, value >> 8 }; |
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239 | struct mipi_dsi_msg msg = { |
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240 | .channel = dsi->channel, |
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241 | .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, |
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242 | .tx_len = sizeof(tx), |
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243 | .tx_buf = tx, |
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244 | }; |
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245 | |||
246 | return mipi_dsi_device_transfer(dsi, &msg); |
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247 | } |
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248 | EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size); |
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249 | |||
250 | /** |
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251 | * mipi_dsi_generic_write() - transmit data using a generic write packet |
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252 | * @dsi: DSI peripheral device |
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253 | * @payload: buffer containing the payload |
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254 | * @size: size of payload buffer |
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255 | * |
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256 | * This function will automatically choose the right data type depending on |
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257 | * the payload length. |
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258 | * |
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259 | * Return: The number of bytes transmitted on success or a negative error code |
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260 | * on failure. |
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261 | */ |
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262 | ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, |
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263 | size_t size) |
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264 | { |
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265 | struct mipi_dsi_msg msg = { |
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266 | .channel = dsi->channel, |
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267 | .tx_buf = payload, |
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268 | .tx_len = size |
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269 | }; |
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270 | |||
271 | switch (size) { |
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272 | case 0: |
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273 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM; |
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274 | break; |
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275 | |||
276 | case 1: |
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277 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM; |
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278 | break; |
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279 | |||
280 | case 2: |
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281 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM; |
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282 | break; |
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283 | |||
284 | default: |
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285 | msg.type = MIPI_DSI_GENERIC_LONG_WRITE; |
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286 | break; |
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287 | } |
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288 | |||
289 | return mipi_dsi_device_transfer(dsi, &msg); |
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290 | } |
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291 | EXPORT_SYMBOL(mipi_dsi_generic_write); |
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292 | |||
293 | /** |
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294 | * mipi_dsi_generic_read() - receive data using a generic read packet |
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295 | * @dsi: DSI peripheral device |
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296 | * @params: buffer containing the request parameters |
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297 | * @num_params: number of request parameters |
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298 | * @data: buffer in which to return the received data |
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299 | * @size: size of receive buffer |
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300 | * |
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301 | * This function will automatically choose the right data type depending on |
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302 | * the number of parameters passed in. |
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303 | * |
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304 | * Return: The number of bytes successfully read or a negative error code on |
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305 | * failure. |
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306 | */ |
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307 | ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, |
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308 | size_t num_params, void *data, size_t size) |
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309 | { |
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310 | struct mipi_dsi_msg msg = { |
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311 | .channel = dsi->channel, |
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312 | .tx_len = num_params, |
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313 | .tx_buf = params, |
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314 | .rx_len = size, |
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315 | .rx_buf = data |
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316 | }; |
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317 | |||
318 | switch (num_params) { |
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319 | case 0: |
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320 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM; |
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321 | break; |
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322 | |||
323 | case 1: |
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324 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM; |
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325 | break; |
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326 | |||
327 | case 2: |
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328 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM; |
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329 | break; |
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330 | |||
331 | default: |
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332 | return -EINVAL; |
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333 | } |
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334 | |||
335 | return mipi_dsi_device_transfer(dsi, &msg); |
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336 | } |
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337 | EXPORT_SYMBOL(mipi_dsi_generic_read); |
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338 | |||
339 | /** |
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340 | * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload |
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341 | * @dsi: DSI peripheral device |
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342 | * @data: buffer containing data to be transmitted |
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343 | * @len: size of transmission buffer |
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344 | * |
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345 | * This function will automatically choose the right data type depending on |
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346 | * the command payload length. |
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347 | * |
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348 | * Return: The number of bytes successfully transmitted or a negative error |
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349 | * code on failure. |
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350 | */ |
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351 | ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, |
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352 | const void *data, size_t len) |
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353 | { |
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354 | struct mipi_dsi_msg msg = { |
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355 | .channel = dsi->channel, |
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356 | .tx_buf = data, |
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357 | .tx_len = len |
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358 | }; |
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359 | |||
360 | switch (len) { |
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361 | case 0: |
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362 | return -EINVAL; |
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363 | |||
364 | case 1: |
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365 | msg.type = MIPI_DSI_DCS_SHORT_WRITE; |
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366 | break; |
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367 | |||
368 | case 2: |
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369 | msg.type = MIPI_DSI_DCS_SHORT_WRITE_PARAM; |
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370 | break; |
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371 | |||
372 | default: |
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373 | msg.type = MIPI_DSI_DCS_LONG_WRITE; |
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374 | break; |
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375 | } |
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376 | |||
377 | return mipi_dsi_device_transfer(dsi, &msg); |
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378 | } |
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379 | EXPORT_SYMBOL(mipi_dsi_dcs_write_buffer); |
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380 | |||
381 | /** |
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382 | * mipi_dsi_dcs_write() - send DCS write command |
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383 | * @dsi: DSI peripheral device |
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384 | * @cmd: DCS command |
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385 | * @data: buffer containing the command payload |
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386 | * @len: command payload length |
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387 | * |
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388 | * This function will automatically choose the right data type depending on |
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389 | * the command payload length. |
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390 | * |
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391 | * Return: The number of bytes successfully transmitted or a negative error |
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392 | * code on failure. |
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393 | */ |
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394 | ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, |
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395 | const void *data, size_t len) |
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396 | { |
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397 | ssize_t err; |
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398 | size_t size; |
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399 | u8 *tx; |
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400 | |||
401 | if (len > 0) { |
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402 | size = 1 + len; |
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403 | |||
404 | tx = kmalloc(size, GFP_KERNEL); |
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405 | if (!tx) |
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406 | return -ENOMEM; |
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407 | |||
408 | /* concatenate the DCS command byte and the payload */ |
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409 | tx[0] = cmd; |
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410 | memcpy(&tx[1], data, len); |
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411 | } else { |
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412 | tx = &cmd; |
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413 | size = 1; |
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414 | } |
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415 | |||
416 | err = mipi_dsi_dcs_write_buffer(dsi, tx, size); |
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417 | |||
418 | if (len > 0) |
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419 | kfree(tx); |
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420 | |||
421 | return err; |
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422 | } |
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423 | EXPORT_SYMBOL(mipi_dsi_dcs_write); |
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424 | |||
425 | /** |
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426 | * mipi_dsi_dcs_read() - send DCS read request command |
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427 | * @dsi: DSI peripheral device |
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428 | * @cmd: DCS command |
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429 | * @data: buffer in which to receive data |
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430 | * @len: size of receive buffer |
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431 | * |
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432 | * Return: The number of bytes read or a negative error code on failure. |
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433 | */ |
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434 | ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, |
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435 | size_t len) |
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436 | { |
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437 | struct mipi_dsi_msg msg = { |
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438 | .channel = dsi->channel, |
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439 | .type = MIPI_DSI_DCS_READ, |
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440 | .tx_buf = &cmd, |
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441 | .tx_len = 1, |
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442 | .rx_buf = data, |
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443 | .rx_len = len |
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444 | }; |
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445 | |||
446 | return mipi_dsi_device_transfer(dsi, &msg); |
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447 | } |
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448 | EXPORT_SYMBOL(mipi_dsi_dcs_read); |
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449 | |||
450 | /** |
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451 | * mipi_dsi_dcs_nop() - send DCS nop packet |
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452 | * @dsi: DSI peripheral device |
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453 | * |
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454 | * Return: 0 on success or a negative error code on failure. |
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455 | */ |
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456 | int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi) |
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457 | { |
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458 | ssize_t err; |
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459 | |||
460 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0); |
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461 | if (err < 0) |
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462 | return err; |
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463 | |||
464 | return 0; |
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465 | } |
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466 | EXPORT_SYMBOL(mipi_dsi_dcs_nop); |
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467 | |||
468 | /** |
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469 | * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module |
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470 | * @dsi: DSI peripheral device |
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471 | * |
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472 | * Return: 0 on success or a negative error code on failure. |
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473 | */ |
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474 | int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi) |
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475 | { |
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476 | ssize_t err; |
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477 | |||
478 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0); |
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479 | if (err < 0) |
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480 | return err; |
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481 | |||
482 | return 0; |
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483 | } |
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484 | EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset); |
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485 | |||
486 | /** |
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487 | * mipi_dsi_dcs_get_power_mode() - query the display module's current power |
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488 | * mode |
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489 | * @dsi: DSI peripheral device |
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490 | * @mode: return location for the current power mode |
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491 | * |
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492 | * Return: 0 on success or a negative error code on failure. |
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493 | */ |
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494 | int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode) |
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495 | { |
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496 | ssize_t err; |
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497 | |||
498 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode, |
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499 | sizeof(*mode)); |
||
500 | if (err <= 0) { |
||
501 | if (err == 0) |
||
502 | err = -ENODATA; |
||
503 | |||
504 | return err; |
||
505 | } |
||
506 | |||
507 | return 0; |
||
508 | } |
||
509 | EXPORT_SYMBOL(mipi_dsi_dcs_get_power_mode); |
||
510 | |||
511 | /** |
||
512 | * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image |
||
513 | * data used by the interface |
||
514 | * @dsi: DSI peripheral device |
||
515 | * @format: return location for the pixel format |
||
516 | * |
||
517 | * Return: 0 on success or a negative error code on failure. |
||
518 | */ |
||
519 | int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format) |
||
520 | { |
||
521 | ssize_t err; |
||
522 | |||
523 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format, |
||
524 | sizeof(*format)); |
||
525 | if (err <= 0) { |
||
526 | if (err == 0) |
||
527 | err = -ENODATA; |
||
528 | |||
529 | return err; |
||
530 | } |
||
531 | |||
532 | return 0; |
||
533 | } |
||
534 | EXPORT_SYMBOL(mipi_dsi_dcs_get_pixel_format); |
||
535 | |||
536 | /** |
||
537 | * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the |
||
538 | * display module except interface communication |
||
539 | * @dsi: DSI peripheral device |
||
540 | * |
||
541 | * Return: 0 on success or a negative error code on failure. |
||
542 | */ |
||
543 | int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi) |
||
544 | { |
||
545 | ssize_t err; |
||
546 | |||
547 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0); |
||
548 | if (err < 0) |
||
549 | return err; |
||
550 | |||
551 | return 0; |
||
552 | } |
||
553 | EXPORT_SYMBOL(mipi_dsi_dcs_enter_sleep_mode); |
||
554 | |||
555 | /** |
||
556 | * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display |
||
557 | * module |
||
558 | * @dsi: DSI peripheral device |
||
559 | * |
||
560 | * Return: 0 on success or a negative error code on failure. |
||
561 | */ |
||
562 | int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi) |
||
563 | { |
||
564 | ssize_t err; |
||
565 | |||
566 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0); |
||
567 | if (err < 0) |
||
568 | return err; |
||
569 | |||
570 | return 0; |
||
571 | } |
||
572 | EXPORT_SYMBOL(mipi_dsi_dcs_exit_sleep_mode); |
||
573 | |||
574 | /** |
||
575 | * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the |
||
576 | * display device |
||
577 | * @dsi: DSI peripheral device |
||
578 | * |
||
579 | * Return: 0 on success or a negative error code on failure. |
||
580 | */ |
||
581 | int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi) |
||
582 | { |
||
583 | ssize_t err; |
||
584 | |||
585 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0); |
||
586 | if (err < 0) |
||
587 | return err; |
||
588 | |||
589 | return 0; |
||
590 | } |
||
591 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_off); |
||
592 | |||
593 | /** |
||
594 | * mipi_dsi_dcs_set_display_on() - start displaying the image data on the |
||
595 | * display device |
||
596 | * @dsi: DSI peripheral device |
||
597 | * |
||
598 | * Return: 0 on success or a negative error code on failure |
||
599 | */ |
||
600 | int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi) |
||
601 | { |
||
602 | ssize_t err; |
||
603 | |||
604 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0); |
||
605 | if (err < 0) |
||
606 | return err; |
||
607 | |||
608 | return 0; |
||
609 | } |
||
610 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on); |
||
611 | |||
612 | /** |
||
613 | * mipi_dsi_dcs_set_column_address() - define the column extent of the frame |
||
614 | * memory accessed by the host processor |
||
615 | * @dsi: DSI peripheral device |
||
616 | * @start: first column of frame memory |
||
617 | * @end: last column of frame memory |
||
618 | * |
||
619 | * Return: 0 on success or a negative error code on failure. |
||
620 | */ |
||
621 | int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, |
||
622 | u16 end) |
||
623 | { |
||
624 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; |
||
625 | ssize_t err; |
||
626 | |||
627 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload, |
||
628 | sizeof(payload)); |
||
629 | if (err < 0) |
||
630 | return err; |
||
631 | |||
632 | return 0; |
||
633 | } |
||
634 | EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address); |
||
635 | |||
636 | /** |
||
637 | * mipi_dsi_dcs_set_page_address() - define the page extent of the frame |
||
638 | * memory accessed by the host processor |
||
639 | * @dsi: DSI peripheral device |
||
640 | * @start: first page of frame memory |
||
641 | * @end: last page of frame memory |
||
642 | * |
||
643 | * Return: 0 on success or a negative error code on failure. |
||
644 | */ |
||
645 | int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, |
||
646 | u16 end) |
||
647 | { |
||
648 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; |
||
649 | ssize_t err; |
||
650 | |||
651 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload, |
||
652 | sizeof(payload)); |
||
653 | if (err < 0) |
||
654 | return err; |
||
655 | |||
656 | return 0; |
||
657 | } |
||
658 | EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address); |
||
659 | |||
660 | /** |
||
661 | * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect |
||
662 | * output signal on the TE signal line |
||
663 | * @dsi: DSI peripheral device |
||
664 | * |
||
665 | * Return: 0 on success or a negative error code on failure |
||
666 | */ |
||
667 | int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi) |
||
668 | { |
||
669 | ssize_t err; |
||
670 | |||
671 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0); |
||
672 | if (err < 0) |
||
673 | return err; |
||
674 | |||
675 | return 0; |
||
676 | } |
||
677 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off); |
||
678 | |||
679 | /** |
||
680 | * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect |
||
681 | * output signal on the TE signal line. |
||
682 | * @dsi: DSI peripheral device |
||
683 | * @mode: the Tearing Effect Output Line mode |
||
684 | * |
||
685 | * Return: 0 on success or a negative error code on failure |
||
686 | */ |
||
687 | int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, |
||
688 | enum mipi_dsi_dcs_tear_mode mode) |
||
689 | { |
||
690 | u8 value = mode; |
||
691 | ssize_t err; |
||
692 | |||
693 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value, |
||
694 | sizeof(value)); |
||
695 | if (err < 0) |
||
696 | return err; |
||
697 | |||
698 | return 0; |
||
699 | } |
||
700 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on); |
||
701 | |||
702 | /** |
||
703 | * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image |
||
704 | * data used by the interface |
||
705 | * @dsi: DSI peripheral device |
||
706 | * @format: pixel format |
||
707 | * |
||
708 | * Return: 0 on success or a negative error code on failure. |
||
709 | */ |
||
710 | int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format) |
||
711 | { |
||
712 | ssize_t err; |
||
713 | |||
714 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format, |
||
715 | sizeof(format)); |
||
716 | if (err < 0) |
||
717 | return err; |
||
718 | |||
719 | return 0; |
||
720 | } |
||
721 | EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); |
||
722 | |||
723 | MODULE_AUTHOR("Andrzej Hajda |
||
724 | MODULE_DESCRIPTION("MIPI DSI Bus"); |
||
725 | MODULE_LICENSE("GPL and additional rights");>>>>>>>>>=>=>>>><> |