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 static const 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 enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, 104 const struct drm_display_mode *mode) 105 { 106 int lanes; 107 struct mipi_dsi_device *dsi = adv->dsi; 108 109 if (mode->clock > 80000) 110 lanes = 4; 111 else 112 lanes = 3; 113 114 /* 115 * TODO: add support for dynamic switching of lanes 116 * by using the bridge pre_enable() op . Till then filter 117 * out the modes which shall need different number of lanes 118 * than what was configured in the device tree. 119 */ 120 if (lanes != dsi->lanes) 121 return MODE_BAD; 122 123 return MODE_OK; 124 } 125 126 int adv7533_patch_registers(struct adv7511 *adv) 127 { 128 return regmap_register_patch(adv->regmap, 129 adv7533_fixed_registers, 130 ARRAY_SIZE(adv7533_fixed_registers)); 131 } 132 133 int adv7533_patch_cec_registers(struct adv7511 *adv) 134 { 135 return regmap_register_patch(adv->regmap_cec, 136 adv7533_cec_fixed_registers, 137 ARRAY_SIZE(adv7533_cec_fixed_registers)); 138 } 139 140 int adv7533_attach_dsi(struct adv7511 *adv) 141 { 142 struct device *dev = &adv->i2c_main->dev; 143 struct mipi_dsi_host *host; 144 struct mipi_dsi_device *dsi; 145 int ret = 0; 146 const struct mipi_dsi_device_info info = { .type = "adv7533", 147 .channel = 0, 148 .node = NULL, 149 }; 150 151 host = of_find_mipi_dsi_host_by_node(adv->host_node); 152 if (!host) 153 return dev_err_probe(dev, -EPROBE_DEFER, 154 "failed to find dsi host\n"); 155 156 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 157 if (IS_ERR(dsi)) 158 return dev_err_probe(dev, PTR_ERR(dsi), 159 "failed to create dsi device\n"); 160 161 adv->dsi = dsi; 162 163 dsi->lanes = adv->num_dsi_lanes; 164 dsi->format = MIPI_DSI_FMT_RGB888; 165 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 166 MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE; 167 168 ret = devm_mipi_dsi_attach(dev, dsi); 169 if (ret < 0) 170 return dev_err_probe(dev, ret, "failed to attach dsi to host\n"); 171 172 return 0; 173 } 174 175 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv) 176 { 177 u32 num_lanes; 178 179 of_property_read_u32(np, "adi,dsi-lanes", &num_lanes); 180 181 if (num_lanes < 1 || num_lanes > 4) 182 return -EINVAL; 183 184 adv->num_dsi_lanes = num_lanes; 185 186 adv->host_node = of_graph_get_remote_node(np, 0, 0); 187 if (!adv->host_node) 188 return -ENODEV; 189 190 of_node_put(adv->host_node); 191 192 adv->use_timing_gen = !of_property_read_bool(np, 193 "adi,disable-timing-generator"); 194 195 /* TODO: Check if these need to be parsed by DT or not */ 196 adv->rgb = true; 197 adv->embedded_sync = false; 198 199 return 0; 200 } 201