1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2016, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/of_graph.h> 7 8 #include "adv7511.h" 9 10 static const struct reg_sequence adv7533_fixed_registers[] = { 11 { 0x16, 0x20 }, 12 { 0x9a, 0xe0 }, 13 { 0xba, 0x70 }, 14 { 0xde, 0x82 }, 15 { 0xe4, 0x40 }, 16 { 0xe5, 0x80 }, 17 }; 18 19 static const struct reg_sequence adv7533_cec_fixed_registers[] = { 20 { 0x15, 0xd0 }, 21 { 0x17, 0xd0 }, 22 { 0x24, 0x20 }, 23 { 0x57, 0x11 }, 24 { 0x05, 0xc8 }, 25 }; 26 27 static void adv7511_dsi_config_timing_gen(struct adv7511 *adv) 28 { 29 struct mipi_dsi_device *dsi = adv->dsi; 30 struct drm_display_mode *mode = &adv->curr_mode; 31 unsigned int hsw, hfp, hbp, vsw, vfp, vbp; 32 u8 clock_div_by_lanes[] = { 6, 4, 3 }; /* 2, 3, 4 lanes */ 33 34 hsw = mode->hsync_end - mode->hsync_start; 35 hfp = mode->hsync_start - mode->hdisplay; 36 hbp = mode->htotal - mode->hsync_end; 37 vsw = mode->vsync_end - mode->vsync_start; 38 vfp = mode->vsync_start - mode->vdisplay; 39 vbp = mode->vtotal - mode->vsync_end; 40 41 /* set pixel clock divider mode */ 42 regmap_write(adv->regmap_cec, 0x16, 43 clock_div_by_lanes[dsi->lanes - 2] << 3); 44 45 /* horizontal porch params */ 46 regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4); 47 regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff); 48 regmap_write(adv->regmap_cec, 0x2a, hsw >> 4); 49 regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff); 50 regmap_write(adv->regmap_cec, 0x2c, hfp >> 4); 51 regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff); 52 regmap_write(adv->regmap_cec, 0x2e, hbp >> 4); 53 regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff); 54 55 /* vertical porch params */ 56 regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4); 57 regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff); 58 regmap_write(adv->regmap_cec, 0x32, vsw >> 4); 59 regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff); 60 regmap_write(adv->regmap_cec, 0x34, vfp >> 4); 61 regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff); 62 regmap_write(adv->regmap_cec, 0x36, vbp >> 4); 63 regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff); 64 } 65 66 void adv7533_dsi_power_on(struct adv7511 *adv) 67 { 68 struct mipi_dsi_device *dsi = adv->dsi; 69 70 if (adv->use_timing_gen) 71 adv7511_dsi_config_timing_gen(adv); 72 73 /* set number of dsi lanes */ 74 regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4); 75 76 if (adv->use_timing_gen) { 77 /* reset internal timing generator */ 78 regmap_write(adv->regmap_cec, 0x27, 0xcb); 79 regmap_write(adv->regmap_cec, 0x27, 0x8b); 80 regmap_write(adv->regmap_cec, 0x27, 0xcb); 81 } else { 82 /* disable internal timing generator */ 83 regmap_write(adv->regmap_cec, 0x27, 0x0b); 84 } 85 86 /* enable hdmi */ 87 regmap_write(adv->regmap_cec, 0x03, 0x89); 88 /* disable test mode */ 89 regmap_write(adv->regmap_cec, 0x55, 0x00); 90 91 regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers, 92 ARRAY_SIZE(adv7533_cec_fixed_registers)); 93 } 94 95 void adv7533_dsi_power_off(struct adv7511 *adv) 96 { 97 /* disable hdmi */ 98 regmap_write(adv->regmap_cec, 0x03, 0x0b); 99 /* disable internal timing generator */ 100 regmap_write(adv->regmap_cec, 0x27, 0x0b); 101 } 102 103 void adv7533_mode_set(struct adv7511 *adv, const struct drm_display_mode *mode) 104 { 105 struct mipi_dsi_device *dsi = adv->dsi; 106 int lanes, ret; 107 108 if (adv->num_dsi_lanes != 4) 109 return; 110 111 if (mode->clock > 80000) 112 lanes = 4; 113 else 114 lanes = 3; 115 116 if (lanes != dsi->lanes) { 117 mipi_dsi_detach(dsi); 118 dsi->lanes = lanes; 119 ret = mipi_dsi_attach(dsi); 120 if (ret) 121 dev_err(&dsi->dev, "failed to change host lanes\n"); 122 } 123 } 124 125 int adv7533_patch_registers(struct adv7511 *adv) 126 { 127 return regmap_register_patch(adv->regmap, 128 adv7533_fixed_registers, 129 ARRAY_SIZE(adv7533_fixed_registers)); 130 } 131 132 int adv7533_patch_cec_registers(struct adv7511 *adv) 133 { 134 return regmap_register_patch(adv->regmap_cec, 135 adv7533_cec_fixed_registers, 136 ARRAY_SIZE(adv7533_cec_fixed_registers)); 137 } 138 139 int adv7533_attach_dsi(struct adv7511 *adv) 140 { 141 struct device *dev = &adv->i2c_main->dev; 142 struct mipi_dsi_host *host; 143 struct mipi_dsi_device *dsi; 144 int ret = 0; 145 const struct mipi_dsi_device_info info = { .type = "adv7533", 146 .channel = 0, 147 .node = NULL, 148 }; 149 150 host = of_find_mipi_dsi_host_by_node(adv->host_node); 151 if (!host) { 152 dev_err(dev, "failed to find dsi host\n"); 153 return -EPROBE_DEFER; 154 } 155 156 dsi = mipi_dsi_device_register_full(host, &info); 157 if (IS_ERR(dsi)) { 158 dev_err(dev, "failed to create dsi device\n"); 159 ret = PTR_ERR(dsi); 160 goto err_dsi_device; 161 } 162 163 adv->dsi = dsi; 164 165 dsi->lanes = adv->num_dsi_lanes; 166 dsi->format = MIPI_DSI_FMT_RGB888; 167 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 168 MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE; 169 170 ret = mipi_dsi_attach(dsi); 171 if (ret < 0) { 172 dev_err(dev, "failed to attach dsi to host\n"); 173 goto err_dsi_attach; 174 } 175 176 return 0; 177 178 err_dsi_attach: 179 mipi_dsi_device_unregister(dsi); 180 err_dsi_device: 181 return ret; 182 } 183 184 void adv7533_detach_dsi(struct adv7511 *adv) 185 { 186 mipi_dsi_detach(adv->dsi); 187 mipi_dsi_device_unregister(adv->dsi); 188 } 189 190 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv) 191 { 192 u32 num_lanes; 193 194 of_property_read_u32(np, "adi,dsi-lanes", &num_lanes); 195 196 if (num_lanes < 1 || num_lanes > 4) 197 return -EINVAL; 198 199 adv->num_dsi_lanes = num_lanes; 200 201 adv->host_node = of_graph_get_remote_node(np, 0, 0); 202 if (!adv->host_node) 203 return -ENODEV; 204 205 of_node_put(adv->host_node); 206 207 adv->use_timing_gen = !of_property_read_bool(np, 208 "adi,disable-timing-generator"); 209 210 /* TODO: Check if these need to be parsed by DT or not */ 211 adv->rgb = true; 212 adv->embedded_sync = false; 213 214 return 0; 215 } 216