drivers/gpu/drm/zte/zx_tvenc.c

   1 /*
   2  * Copyright 2017 Linaro Ltd.
   3  * Copyright 2017 ZTE Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/component.h>
  13 #include <linux/mfd/syscon.h>
  14 #include <linux/regmap.h>
  15
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_probe_helper.h>
  18 #include <drm/drmP.h>
  19
  20 #include "zx_drm_drv.h"
  21 #include "zx_tvenc_regs.h"
  22 #include "zx_vou.h"
  23
  24 struct zx_tvenc_pwrctrl {
  25         struct regmap *regmap;
  26         u32 reg;
  27         u32 mask;
  28 };
  29
  30 struct zx_tvenc {
  31         struct drm_connector connector;
  32         struct drm_encoder encoder;
  33         struct device *dev;
  34         void __iomem *mmio;
  35         const struct vou_inf *inf;
  36         struct zx_tvenc_pwrctrl pwrctrl;
  37 };
  38
  39 #define to_zx_tvenc(x) container_of(x, struct zx_tvenc, x)
  40
  41 struct zx_tvenc_mode {
  42         struct drm_display_mode mode;
  43         u32 video_info;
  44         u32 video_res;
  45         u32 field1_param;
  46         u32 field2_param;
  47         u32 burst_line_odd1;
  48         u32 burst_line_even1;
  49         u32 burst_line_odd2;
  50         u32 burst_line_even2;
  51         u32 line_timing_param;
  52         u32 weight_value;
  53         u32 blank_black_level;
  54         u32 burst_level;
  55         u32 control_param;
  56         u32 sub_carrier_phase1;
  57         u32 phase_line_incr_cvbs;
  58 };
  59
  60 /*
  61  * The CRM cannot directly provide a suitable frequency, and we have to
  62  * ask a multiplied rate from CRM and use the divider in VOU to get the
  63  * desired one.
  64  */
  65 #define TVENC_CLOCK_MULTIPLIER  4
  66
  67 static const struct zx_tvenc_mode tvenc_mode_pal = {
  68         .mode = {
  69                 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
  70                 .hdisplay = 720,
  71                 .hsync_start = 720 + 12,
  72                 .hsync_end = 720 + 12 + 2,
  73                 .htotal = 720 + 12 + 2 + 130,
  74                 .vdisplay = 576,
  75                 .vsync_start = 576 + 2,
  76                 .vsync_end = 576 + 2 + 2,
  77                 .vtotal = 576 + 2 + 2 + 20,
  78                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
  79                          DRM_MODE_FLAG_INTERLACE,
  80         },
  81         .video_info = 0x00040040,
  82         .video_res = 0x05a9c760,
  83         .field1_param = 0x0004d416,
  84         .field2_param = 0x0009b94f,
  85         .burst_line_odd1 = 0x0004d406,
  86         .burst_line_even1 = 0x0009b53e,
  87         .burst_line_odd2 = 0x0004d805,
  88         .burst_line_even2 = 0x0009b93f,
  89         .line_timing_param = 0x06a96fdf,
  90         .weight_value = 0x00c188a0,
  91         .blank_black_level = 0x0000fcfc,
  92         .burst_level = 0x00001595,
  93         .control_param = 0x00000001,
  94         .sub_carrier_phase1 = 0x1504c566,
  95         .phase_line_incr_cvbs = 0xc068db8c,
  96 };
  97
  98 static const struct zx_tvenc_mode tvenc_mode_ntsc = {
  99         .mode = {
 100                 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
 101                 .hdisplay = 720,
 102                 .hsync_start = 720 + 16,
 103                 .hsync_end = 720 + 16 + 2,
 104                 .htotal = 720 + 16 + 2 + 120,
 105                 .vdisplay = 480,
 106                 .vsync_start = 480 + 3,
 107                 .vsync_end = 480 + 3 + 2,
 108                 .vtotal = 480 + 3 + 2 + 17,
 109                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
 110                          DRM_MODE_FLAG_INTERLACE,
 111         },
 112         .video_info = 0x00040080,
 113         .video_res = 0x05a8375a,
 114         .field1_param = 0x00041817,
 115         .field2_param = 0x0008351e,
 116         .burst_line_odd1 = 0x00041006,
 117         .burst_line_even1 = 0x0008290d,
 118         .burst_line_odd2 = 0x00000000,
 119         .burst_line_even2 = 0x00000000,
 120         .line_timing_param = 0x06a8ef9e,
 121         .weight_value = 0x00b68197,
 122         .blank_black_level = 0x0000f0f0,
 123         .burst_level = 0x0000009c,
 124         .control_param = 0x00000001,
 125         .sub_carrier_phase1 = 0x10f83e10,
 126         .phase_line_incr_cvbs = 0x80000000,
 127 };
 128
 129 static const struct zx_tvenc_mode *tvenc_modes[] = {
 130         &tvenc_mode_pal,
 131         &tvenc_mode_ntsc,
 132 };
 133
 134 static const struct zx_tvenc_mode *
 135 zx_tvenc_find_zmode(struct drm_display_mode *mode)
 136 {
 137         int i;
 138
 139         for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
 140                 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
 141
 142                 if (drm_mode_equal(mode, &zmode->mode))
 143                         return zmode;
 144         }
 145
 146         return NULL;
 147 }
 148
 149 static void zx_tvenc_encoder_mode_set(struct drm_encoder *encoder,
 150                                       struct drm_display_mode *mode,
 151                                       struct drm_display_mode *adj_mode)
 152 {
 153         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 154         const struct zx_tvenc_mode *zmode;
 155         struct vou_div_config configs[] = {
 156                 { VOU_DIV_INF,   VOU_DIV_4 },
 157                 { VOU_DIV_TVENC, VOU_DIV_1 },
 158                 { VOU_DIV_LAYER, VOU_DIV_2 },
 159         };
 160
 161         zx_vou_config_dividers(encoder->crtc, configs, ARRAY_SIZE(configs));
 162
 163         zmode = zx_tvenc_find_zmode(mode);
 164         if (!zmode) {
 165                 DRM_DEV_ERROR(tvenc->dev, "failed to find zmode\n");
 166                 return;
 167         }
 168
 169         zx_writel(tvenc->mmio + VENC_VIDEO_INFO, zmode->video_info);
 170         zx_writel(tvenc->mmio + VENC_VIDEO_RES, zmode->video_res);
 171         zx_writel(tvenc->mmio + VENC_FIELD1_PARAM, zmode->field1_param);
 172         zx_writel(tvenc->mmio + VENC_FIELD2_PARAM, zmode->field2_param);
 173         zx_writel(tvenc->mmio + VENC_LINE_O_1, zmode->burst_line_odd1);
 174         zx_writel(tvenc->mmio + VENC_LINE_E_1, zmode->burst_line_even1);
 175         zx_writel(tvenc->mmio + VENC_LINE_O_2, zmode->burst_line_odd2);
 176         zx_writel(tvenc->mmio + VENC_LINE_E_2, zmode->burst_line_even2);
 177         zx_writel(tvenc->mmio + VENC_LINE_TIMING_PARAM,
 178                   zmode->line_timing_param);
 179         zx_writel(tvenc->mmio + VENC_WEIGHT_VALUE, zmode->weight_value);
 180         zx_writel(tvenc->mmio + VENC_BLANK_BLACK_LEVEL,
 181                   zmode->blank_black_level);
 182         zx_writel(tvenc->mmio + VENC_BURST_LEVEL, zmode->burst_level);
 183         zx_writel(tvenc->mmio + VENC_CONTROL_PARAM, zmode->control_param);
 184         zx_writel(tvenc->mmio + VENC_SUB_CARRIER_PHASE1,
 185                   zmode->sub_carrier_phase1);
 186         zx_writel(tvenc->mmio + VENC_PHASE_LINE_INCR_CVBS,
 187                   zmode->phase_line_incr_cvbs);
 188 }
 189
 190 static void zx_tvenc_encoder_enable(struct drm_encoder *encoder)
 191 {
 192         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 193         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 194
 195         /* Set bit to power up TVENC DAC */
 196         regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
 197                            pwrctrl->mask);
 198
 199         vou_inf_enable(VOU_TV_ENC, encoder->crtc);
 200
 201         zx_writel(tvenc->mmio + VENC_ENABLE, 1);
 202 }
 203
 204 static void zx_tvenc_encoder_disable(struct drm_encoder *encoder)
 205 {
 206         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 207         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 208
 209         zx_writel(tvenc->mmio + VENC_ENABLE, 0);
 210
 211         vou_inf_disable(VOU_TV_ENC, encoder->crtc);
 212
 213         /* Clear bit to power down TVENC DAC */
 214         regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
 215 }
 216
 217 static const struct drm_encoder_helper_funcs zx_tvenc_encoder_helper_funcs = {
 218         .enable = zx_tvenc_encoder_enable,
 219         .disable = zx_tvenc_encoder_disable,
 220         .mode_set = zx_tvenc_encoder_mode_set,
 221 };
 222
 223 static const struct drm_encoder_funcs zx_tvenc_encoder_funcs = {
 224         .destroy = drm_encoder_cleanup,
 225 };
 226
 227 static int zx_tvenc_connector_get_modes(struct drm_connector *connector)
 228 {
 229         struct zx_tvenc *tvenc = to_zx_tvenc(connector);
 230         struct device *dev = tvenc->dev;
 231         int i;
 232
 233         for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
 234                 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
 235                 struct drm_display_mode *mode;
 236
 237                 mode = drm_mode_duplicate(connector->dev, &zmode->mode);
 238                 if (!mode) {
 239                         DRM_DEV_ERROR(dev, "failed to duplicate drm mode\n");
 240                         continue;
 241                 }
 242
 243                 drm_mode_set_name(mode);
 244                 drm_mode_probed_add(connector, mode);
 245         }
 246
 247         return i;
 248 }
 249
 250 static enum drm_mode_status
 251 zx_tvenc_connector_mode_valid(struct drm_connector *connector,
 252                               struct drm_display_mode *mode)
 253 {
 254         struct zx_tvenc *tvenc = to_zx_tvenc(connector);
 255         const struct zx_tvenc_mode *zmode;
 256
 257         zmode = zx_tvenc_find_zmode(mode);
 258         if (!zmode) {
 259                 DRM_DEV_ERROR(tvenc->dev, "unsupported mode: %s\n", mode->name);
 260                 return MODE_NOMODE;
 261         }
 262
 263         return MODE_OK;
 264 }
 265
 266 static struct drm_connector_helper_funcs zx_tvenc_connector_helper_funcs = {
 267         .get_modes = zx_tvenc_connector_get_modes,
 268         .mode_valid = zx_tvenc_connector_mode_valid,
 269 };
 270
 271 static const struct drm_connector_funcs zx_tvenc_connector_funcs = {
 272         .fill_modes = drm_helper_probe_single_connector_modes,
 273         .destroy = drm_connector_cleanup,
 274         .reset = drm_atomic_helper_connector_reset,
 275         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 276         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 277 };
 278
 279 static int zx_tvenc_register(struct drm_device *drm, struct zx_tvenc *tvenc)
 280 {
 281         struct drm_encoder *encoder = &tvenc->encoder;
 282         struct drm_connector *connector = &tvenc->connector;
 283
 284         /*
 285          * The tvenc is designed to use aux channel, as there is a deflicker
 286          * block for the channel.
 287          */
 288         encoder->possible_crtcs = BIT(1);
 289
 290         drm_encoder_init(drm, encoder, &zx_tvenc_encoder_funcs,
 291                          DRM_MODE_ENCODER_TVDAC, NULL);
 292         drm_encoder_helper_add(encoder, &zx_tvenc_encoder_helper_funcs);
 293
 294         connector->interlace_allowed = true;
 295
 296         drm_connector_init(drm, connector, &zx_tvenc_connector_funcs,
 297                            DRM_MODE_CONNECTOR_Composite);
 298         drm_connector_helper_add(connector, &zx_tvenc_connector_helper_funcs);
 299
 300         drm_connector_attach_encoder(connector, encoder);
 301
 302         return 0;
 303 }
 304
 305 static int zx_tvenc_pwrctrl_init(struct zx_tvenc *tvenc)
 306 {
 307         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 308         struct device *dev = tvenc->dev;
 309         struct of_phandle_args out_args;
 310         struct regmap *regmap;
 311         int ret;
 312
 313         ret = of_parse_phandle_with_fixed_args(dev->of_node,
 314                                 "zte,tvenc-power-control", 2, 0, &out_args);
 315         if (ret)
 316                 return ret;
 317
 318         regmap = syscon_node_to_regmap(out_args.np);
 319         if (IS_ERR(regmap)) {
 320                 ret = PTR_ERR(regmap);
 321                 goto out;
 322         }
 323
 324         pwrctrl->regmap = regmap;
 325         pwrctrl->reg = out_args.args[0];
 326         pwrctrl->mask = out_args.args[1];
 327
 328 out:
 329         of_node_put(out_args.np);
 330         return ret;
 331 }
 332
 333 static int zx_tvenc_bind(struct device *dev, struct device *master, void *data)
 334 {
 335         struct platform_device *pdev = to_platform_device(dev);
 336         struct drm_device *drm = data;
 337         struct resource *res;
 338         struct zx_tvenc *tvenc;
 339         int ret;
 340
 341         tvenc = devm_kzalloc(dev, sizeof(*tvenc), GFP_KERNEL);
 342         if (!tvenc)
 343                 return -ENOMEM;
 344
 345         tvenc->dev = dev;
 346         dev_set_drvdata(dev, tvenc);
 347
 348         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 349         tvenc->mmio = devm_ioremap_resource(dev, res);
 350         if (IS_ERR(tvenc->mmio)) {
 351                 ret = PTR_ERR(tvenc->mmio);
 352                 DRM_DEV_ERROR(dev, "failed to remap tvenc region: %d\n", ret);
 353                 return ret;
 354         }
 355
 356         ret = zx_tvenc_pwrctrl_init(tvenc);
 357         if (ret) {
 358                 DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
 359                 return ret;
 360         }
 361
 362         ret = zx_tvenc_register(drm, tvenc);
 363         if (ret) {
 364                 DRM_DEV_ERROR(dev, "failed to register tvenc: %d\n", ret);
 365                 return ret;
 366         }
 367
 368         return 0;
 369 }
 370
 371 static void zx_tvenc_unbind(struct device *dev, struct device *master,
 372                             void *data)
 373 {
 374         /* Nothing to do */
 375 }
 376
 377 static const struct component_ops zx_tvenc_component_ops = {
 378         .bind = zx_tvenc_bind,
 379         .unbind = zx_tvenc_unbind,
 380 };
 381
 382 static int zx_tvenc_probe(struct platform_device *pdev)
 383 {
 384         return component_add(&pdev->dev, &zx_tvenc_component_ops);
 385 }
 386
 387 static int zx_tvenc_remove(struct platform_device *pdev)
 388 {
 389         component_del(&pdev->dev, &zx_tvenc_component_ops);
 390         return 0;
 391 }
 392
 393 static const struct of_device_id zx_tvenc_of_match[] = {
 394         { .compatible = "zte,zx296718-tvenc", },
 395         { /* end */ },
 396 };
 397 MODULE_DEVICE_TABLE(of, zx_tvenc_of_match);
 398
 399 struct platform_driver zx_tvenc_driver = {
 400         .probe = zx_tvenc_probe,
 401         .remove = zx_tvenc_remove,
 402         .driver = {
 403                 .name = "zx-tvenc",
 404                 .of_match_table = zx_tvenc_of_match,
 405         },
 406 };