drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

   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 const 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_enable(struct drm_encoder *encoder)
 199 {
 200         struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
 201         u32 val;
 202         int mux;
 203
 204         mux = drm_of_encoder_active_endpoint_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 int
 216 dw_hdmi_rockchip_encoder_atomic_check(struct drm_encoder *encoder,
 217                                       struct drm_crtc_state *crtc_state,
 218                                       struct drm_connector_state *conn_state)
 219 {
 220         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 221
 222         s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
 223         s->output_type = DRM_MODE_CONNECTOR_HDMIA;
 224
 225         return 0;
 226 }
 227
 228 static const struct drm_encoder_helper_funcs dw_hdmi_rockchip_encoder_helper_funcs = {
 229         .mode_fixup = dw_hdmi_rockchip_encoder_mode_fixup,
 230         .mode_set   = dw_hdmi_rockchip_encoder_mode_set,
 231         .enable     = dw_hdmi_rockchip_encoder_enable,
 232         .disable    = dw_hdmi_rockchip_encoder_disable,
 233         .atomic_check = dw_hdmi_rockchip_encoder_atomic_check,
 234 };
 235
 236 static const struct dw_hdmi_plat_data rockchip_hdmi_drv_data = {
 237         .mode_valid = dw_hdmi_rockchip_mode_valid,
 238         .mpll_cfg   = rockchip_mpll_cfg,
 239         .cur_ctr    = rockchip_cur_ctr,
 240         .phy_config = rockchip_phy_config,
 241         .dev_type   = RK3288_HDMI,
 242 };
 243
 244 static const struct of_device_id dw_hdmi_rockchip_dt_ids[] = {
 245         { .compatible = "rockchip,rk3288-dw-hdmi",
 246           .data = &rockchip_hdmi_drv_data
 247         },
 248         {},
 249 };
 250 MODULE_DEVICE_TABLE(of, dw_hdmi_rockchip_dt_ids);
 251
 252 static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 253                                  void *data)
 254 {
 255         struct platform_device *pdev = to_platform_device(dev);
 256         const struct dw_hdmi_plat_data *plat_data;
 257         const struct of_device_id *match;
 258         struct drm_device *drm = data;
 259         struct drm_encoder *encoder;
 260         struct rockchip_hdmi *hdmi;
 261         struct resource *iores;
 262         int irq;
 263         int ret;
 264
 265         if (!pdev->dev.of_node)
 266                 return -ENODEV;
 267
 268         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 269         if (!hdmi)
 270                 return -ENOMEM;
 271
 272         match = of_match_node(dw_hdmi_rockchip_dt_ids, pdev->dev.of_node);
 273         plat_data = match->data;
 274         hdmi->dev = &pdev->dev;
 275         encoder = &hdmi->encoder;
 276
 277         irq = platform_get_irq(pdev, 0);
 278         if (irq < 0)
 279                 return irq;
 280
 281         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 282         if (!iores)
 283                 return -ENXIO;
 284
 285         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
 286         /*
 287          * If we failed to find the CRTC(s) which this encoder is
 288          * supposed to be connected to, it's because the CRTC has
 289          * not been registered yet.  Defer probing, and hope that
 290          * the required CRTC is added later.
 291          */
 292         if (encoder->possible_crtcs == 0)
 293                 return -EPROBE_DEFER;
 294
 295         ret = rockchip_hdmi_parse_dt(hdmi);
 296         if (ret) {
 297                 dev_err(hdmi->dev, "Unable to parse OF data\n");
 298                 return ret;
 299         }
 300
 301         drm_encoder_helper_add(encoder, &dw_hdmi_rockchip_encoder_helper_funcs);
 302         drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
 303                          DRM_MODE_ENCODER_TMDS, NULL);
 304
 305         ret = dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
 306
 307         /*
 308          * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 309          * which would have called the encoder cleanup.  Do it manually.
 310          */
 311         if (ret)
 312                 drm_encoder_cleanup(encoder);
 313
 314         return ret;
 315 }
 316
 317 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 318                                     void *data)
 319 {
 320         return dw_hdmi_unbind(dev, master, data);
 321 }
 322
 323 static const struct component_ops dw_hdmi_rockchip_ops = {
 324         .bind   = dw_hdmi_rockchip_bind,
 325         .unbind = dw_hdmi_rockchip_unbind,
 326 };
 327
 328 static int dw_hdmi_rockchip_probe(struct platform_device *pdev)
 329 {
 330         return component_add(&pdev->dev, &dw_hdmi_rockchip_ops);
 331 }
 332
 333 static int dw_hdmi_rockchip_remove(struct platform_device *pdev)
 334 {
 335         component_del(&pdev->dev, &dw_hdmi_rockchip_ops);
 336
 337         return 0;
 338 }
 339
 340 static struct platform_driver dw_hdmi_rockchip_pltfm_driver = {
 341         .probe  = dw_hdmi_rockchip_probe,
 342         .remove = dw_hdmi_rockchip_remove,
 343         .driver = {
 344                 .name = "dwhdmi-rockchip",
 345                 .of_match_table = dw_hdmi_rockchip_dt_ids,
 346         },
 347 };
 348
 349 module_platform_driver(dw_hdmi_rockchip_pltfm_driver);
 350
 351 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
 352 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 353 MODULE_DESCRIPTION("Rockchip Specific DW-HDMI Driver Extension");
 354 MODULE_LICENSE("GPL");
 355 MODULE_ALIAS("platform:dwhdmi-rockchip");