1 /* 2 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/platform_device.h> 12 #include <linux/mfd/syscon.h> 13 #include <linux/regmap.h> 14 #include <drm/drm_of.h> 15 #include <drm/drmP.h> 16 #include <drm/drm_crtc_helper.h> 17 #include <drm/drm_edid.h> 18 #include <drm/drm_encoder_slave.h> 19 #include <drm/bridge/dw_hdmi.h> 20 21 #include "rockchip_drm_drv.h" 22 #include "rockchip_drm_vop.h" 23 24 #define GRF_SOC_CON6 0x025c 25 #define HDMI_SEL_VOP_LIT (1 << 4) 26 27 struct rockchip_hdmi { 28 struct device *dev; 29 struct regmap *regmap; 30 struct drm_encoder encoder; 31 }; 32 33 #define to_rockchip_hdmi(x) container_of(x, struct rockchip_hdmi, x) 34 35 static const struct dw_hdmi_mpll_config rockchip_mpll_cfg[] = { 36 { 37 27000000, { 38 { 0x00b3, 0x0000}, 39 { 0x2153, 0x0000}, 40 { 0x40f3, 0x0000} 41 }, 42 }, { 43 36000000, { 44 { 0x00b3, 0x0000}, 45 { 0x2153, 0x0000}, 46 { 0x40f3, 0x0000} 47 }, 48 }, { 49 40000000, { 50 { 0x00b3, 0x0000}, 51 { 0x2153, 0x0000}, 52 { 0x40f3, 0x0000} 53 }, 54 }, { 55 54000000, { 56 { 0x0072, 0x0001}, 57 { 0x2142, 0x0001}, 58 { 0x40a2, 0x0001}, 59 }, 60 }, { 61 65000000, { 62 { 0x0072, 0x0001}, 63 { 0x2142, 0x0001}, 64 { 0x40a2, 0x0001}, 65 }, 66 }, { 67 66000000, { 68 { 0x013e, 0x0003}, 69 { 0x217e, 0x0002}, 70 { 0x4061, 0x0002} 71 }, 72 }, { 73 74250000, { 74 { 0x0072, 0x0001}, 75 { 0x2145, 0x0002}, 76 { 0x4061, 0x0002} 77 }, 78 }, { 79 83500000, { 80 { 0x0072, 0x0001}, 81 }, 82 }, { 83 108000000, { 84 { 0x0051, 0x0002}, 85 { 0x2145, 0x0002}, 86 { 0x4061, 0x0002} 87 }, 88 }, { 89 106500000, { 90 { 0x0051, 0x0002}, 91 { 0x2145, 0x0002}, 92 { 0x4061, 0x0002} 93 }, 94 }, { 95 146250000, { 96 { 0x0051, 0x0002}, 97 { 0x2145, 0x0002}, 98 { 0x4061, 0x0002} 99 }, 100 }, { 101 148500000, { 102 { 0x0051, 0x0003}, 103 { 0x214c, 0x0003}, 104 { 0x4064, 0x0003} 105 }, 106 }, { 107 ~0UL, { 108 { 0x00a0, 0x000a }, 109 { 0x2001, 0x000f }, 110 { 0x4002, 0x000f }, 111 }, 112 } 113 }; 114 115 static const struct dw_hdmi_curr_ctrl rockchip_cur_ctr[] = { 116 /* pixelclk bpp8 bpp10 bpp12 */ 117 { 118 40000000, { 0x0018, 0x0018, 0x0018 }, 119 }, { 120 65000000, { 0x0028, 0x0028, 0x0028 }, 121 }, { 122 66000000, { 0x0038, 0x0038, 0x0038 }, 123 }, { 124 74250000, { 0x0028, 0x0038, 0x0038 }, 125 }, { 126 83500000, { 0x0028, 0x0038, 0x0038 }, 127 }, { 128 146250000, { 0x0038, 0x0038, 0x0038 }, 129 }, { 130 148500000, { 0x0000, 0x0038, 0x0038 }, 131 }, { 132 ~0UL, { 0x0000, 0x0000, 0x0000}, 133 } 134 }; 135 136 static const struct dw_hdmi_phy_config rockchip_phy_config[] = { 137 /*pixelclk symbol term vlev*/ 138 { 74250000, 0x8009, 0x0004, 0x0272}, 139 { 148500000, 0x802b, 0x0004, 0x028d}, 140 { 297000000, 0x8039, 0x0005, 0x028d}, 141 { ~0UL, 0x0000, 0x0000, 0x0000} 142 }; 143 144 static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi) 145 { 146 struct device_node *np = hdmi->dev->of_node; 147 148 hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); 149 if (IS_ERR(hdmi->regmap)) { 150 dev_err(hdmi->dev, "Unable to get rockchip,grf\n"); 151 return PTR_ERR(hdmi->regmap); 152 } 153 154 return 0; 155 } 156 157 static enum drm_mode_status 158 dw_hdmi_rockchip_mode_valid(struct drm_connector *connector, 159 struct drm_display_mode *mode) 160 { 161 const struct dw_hdmi_mpll_config *mpll_cfg = rockchip_mpll_cfg; 162 int pclk = mode->clock * 1000; 163 bool valid = false; 164 int i; 165 166 for (i = 0; mpll_cfg[i].mpixelclock != (~0UL); i++) { 167 if (pclk == mpll_cfg[i].mpixelclock) { 168 valid = true; 169 break; 170 } 171 } 172 173 return (valid) ? MODE_OK : MODE_BAD; 174 } 175 176 static struct drm_encoder_funcs dw_hdmi_rockchip_encoder_funcs = { 177 .destroy = drm_encoder_cleanup, 178 }; 179 180 static void dw_hdmi_rockchip_encoder_disable(struct drm_encoder *encoder) 181 { 182 } 183 184 static bool 185 dw_hdmi_rockchip_encoder_mode_fixup(struct drm_encoder *encoder, 186 const struct drm_display_mode *mode, 187 struct drm_display_mode *adj_mode) 188 { 189 return true; 190 } 191 192 static void dw_hdmi_rockchip_encoder_mode_set(struct drm_encoder *encoder, 193 struct drm_display_mode *mode, 194 struct drm_display_mode *adj_mode) 195 { 196 } 197 198 static void dw_hdmi_rockchip_encoder_commit(struct drm_encoder *encoder) 199 { 200 struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder); 201 u32 val; 202 int mux; 203 204 mux = rockchip_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder); 205 if (mux) 206 val = HDMI_SEL_VOP_LIT | (HDMI_SEL_VOP_LIT << 16); 207 else 208 val = HDMI_SEL_VOP_LIT << 16; 209 210 regmap_write(hdmi->regmap, GRF_SOC_CON6, val); 211 dev_dbg(hdmi->dev, "vop %s output to hdmi\n", 212 (mux) ? "LIT" : "BIG"); 213 } 214 215 static void dw_hdmi_rockchip_encoder_prepare(struct drm_encoder *encoder) 216 { 217 rockchip_drm_crtc_mode_config(encoder->crtc, DRM_MODE_CONNECTOR_HDMIA, 218 ROCKCHIP_OUT_MODE_AAAA); 219 } 220 221 static struct drm_encoder_helper_funcs dw_hdmi_rockchip_encoder_helper_funcs = { 222 .mode_fixup = dw_hdmi_rockchip_encoder_mode_fixup, 223 .mode_set = dw_hdmi_rockchip_encoder_mode_set, 224 .prepare = dw_hdmi_rockchip_encoder_prepare, 225 .commit = dw_hdmi_rockchip_encoder_commit, 226 .disable = dw_hdmi_rockchip_encoder_disable, 227 }; 228 229 static const struct dw_hdmi_plat_data rockchip_hdmi_drv_data = { 230 .mode_valid = dw_hdmi_rockchip_mode_valid, 231 .mpll_cfg = rockchip_mpll_cfg, 232 .cur_ctr = rockchip_cur_ctr, 233 .phy_config = rockchip_phy_config, 234 .dev_type = RK3288_HDMI, 235 }; 236 237 static const struct of_device_id dw_hdmi_rockchip_dt_ids[] = { 238 { .compatible = "rockchip,rk3288-dw-hdmi", 239 .data = &rockchip_hdmi_drv_data 240 }, 241 {}, 242 }; 243 MODULE_DEVICE_TABLE(of, dw_hdmi_rockchip_dt_ids); 244 245 static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master, 246 void *data) 247 { 248 struct platform_device *pdev = to_platform_device(dev); 249 const struct dw_hdmi_plat_data *plat_data; 250 const struct of_device_id *match; 251 struct drm_device *drm = data; 252 struct drm_encoder *encoder; 253 struct rockchip_hdmi *hdmi; 254 struct resource *iores; 255 int irq; 256 int ret; 257 258 if (!pdev->dev.of_node) 259 return -ENODEV; 260 261 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); 262 if (!hdmi) 263 return -ENOMEM; 264 265 match = of_match_node(dw_hdmi_rockchip_dt_ids, pdev->dev.of_node); 266 plat_data = match->data; 267 hdmi->dev = &pdev->dev; 268 encoder = &hdmi->encoder; 269 270 irq = platform_get_irq(pdev, 0); 271 if (irq < 0) 272 return irq; 273 274 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); 275 if (!iores) 276 return -ENXIO; 277 278 platform_set_drvdata(pdev, hdmi); 279 280 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); 281 /* 282 * If we failed to find the CRTC(s) which this encoder is 283 * supposed to be connected to, it's because the CRTC has 284 * not been registered yet. Defer probing, and hope that 285 * the required CRTC is added later. 286 */ 287 if (encoder->possible_crtcs == 0) 288 return -EPROBE_DEFER; 289 290 ret = rockchip_hdmi_parse_dt(hdmi); 291 if (ret) { 292 dev_err(hdmi->dev, "Unable to parse OF data\n"); 293 return ret; 294 } 295 296 drm_encoder_helper_add(encoder, &dw_hdmi_rockchip_encoder_helper_funcs); 297 drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs, 298 DRM_MODE_ENCODER_TMDS); 299 300 return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data); 301 } 302 303 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master, 304 void *data) 305 { 306 return dw_hdmi_unbind(dev, master, data); 307 } 308 309 static const struct component_ops dw_hdmi_rockchip_ops = { 310 .bind = dw_hdmi_rockchip_bind, 311 .unbind = dw_hdmi_rockchip_unbind, 312 }; 313 314 static int dw_hdmi_rockchip_probe(struct platform_device *pdev) 315 { 316 return component_add(&pdev->dev, &dw_hdmi_rockchip_ops); 317 } 318 319 static int dw_hdmi_rockchip_remove(struct platform_device *pdev) 320 { 321 component_del(&pdev->dev, &dw_hdmi_rockchip_ops); 322 323 return 0; 324 } 325 326 static struct platform_driver dw_hdmi_rockchip_pltfm_driver = { 327 .probe = dw_hdmi_rockchip_probe, 328 .remove = dw_hdmi_rockchip_remove, 329 .driver = { 330 .name = "dwhdmi-rockchip", 331 .of_match_table = dw_hdmi_rockchip_dt_ids, 332 }, 333 }; 334 335 module_platform_driver(dw_hdmi_rockchip_pltfm_driver); 336 337 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>"); 338 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); 339 MODULE_DESCRIPTION("Rockchip Specific DW-HDMI Driver Extension"); 340 MODULE_LICENSE("GPL"); 341 MODULE_ALIAS("platform:dwhdmi-rockchip"); 342