drivers/gpu/drm/zte/zx_tvenc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2017 Linaro Ltd.
   4  * Copyright 2017 ZTE Corporation.
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/mfd/syscon.h>
  10 #include <linux/regmap.h>
  11
  12 #include <drm/drm_atomic_helper.h>
  13 #include <drm/drm_probe_helper.h>
  14 #include <drm/drmP.h>
  15
  16 #include "zx_drm_drv.h"
  17 #include "zx_tvenc_regs.h"
  18 #include "zx_vou.h"
  19
  20 struct zx_tvenc_pwrctrl {
  21         struct regmap *regmap;
  22         u32 reg;
  23         u32 mask;
  24 };
  25
  26 struct zx_tvenc {
  27         struct drm_connector connector;
  28         struct drm_encoder encoder;
  29         struct device *dev;
  30         void __iomem *mmio;
  31         const struct vou_inf *inf;
  32         struct zx_tvenc_pwrctrl pwrctrl;
  33 };
  34
  35 #define to_zx_tvenc(x) container_of(x, struct zx_tvenc, x)
  36
  37 struct zx_tvenc_mode {
  38         struct drm_display_mode mode;
  39         u32 video_info;
  40         u32 video_res;
  41         u32 field1_param;
  42         u32 field2_param;
  43         u32 burst_line_odd1;
  44         u32 burst_line_even1;
  45         u32 burst_line_odd2;
  46         u32 burst_line_even2;
  47         u32 line_timing_param;
  48         u32 weight_value;
  49         u32 blank_black_level;
  50         u32 burst_level;
  51         u32 control_param;
  52         u32 sub_carrier_phase1;
  53         u32 phase_line_incr_cvbs;
  54 };
  55
  56 /*
  57  * The CRM cannot directly provide a suitable frequency, and we have to
  58  * ask a multiplied rate from CRM and use the divider in VOU to get the
  59  * desired one.
  60  */
  61 #define TVENC_CLOCK_MULTIPLIER  4
  62
  63 static const struct zx_tvenc_mode tvenc_mode_pal = {
  64         .mode = {
  65                 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
  66                 .hdisplay = 720,
  67                 .hsync_start = 720 + 12,
  68                 .hsync_end = 720 + 12 + 2,
  69                 .htotal = 720 + 12 + 2 + 130,
  70                 .vdisplay = 576,
  71                 .vsync_start = 576 + 2,
  72                 .vsync_end = 576 + 2 + 2,
  73                 .vtotal = 576 + 2 + 2 + 20,
  74                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
  75                          DRM_MODE_FLAG_INTERLACE,
  76         },
  77         .video_info = 0x00040040,
  78         .video_res = 0x05a9c760,
  79         .field1_param = 0x0004d416,
  80         .field2_param = 0x0009b94f,
  81         .burst_line_odd1 = 0x0004d406,
  82         .burst_line_even1 = 0x0009b53e,
  83         .burst_line_odd2 = 0x0004d805,
  84         .burst_line_even2 = 0x0009b93f,
  85         .line_timing_param = 0x06a96fdf,
  86         .weight_value = 0x00c188a0,
  87         .blank_black_level = 0x0000fcfc,
  88         .burst_level = 0x00001595,
  89         .control_param = 0x00000001,
  90         .sub_carrier_phase1 = 0x1504c566,
  91         .phase_line_incr_cvbs = 0xc068db8c,
  92 };
  93
  94 static const struct zx_tvenc_mode tvenc_mode_ntsc = {
  95         .mode = {
  96                 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
  97                 .hdisplay = 720,
  98                 .hsync_start = 720 + 16,
  99                 .hsync_end = 720 + 16 + 2,
 100                 .htotal = 720 + 16 + 2 + 120,
 101                 .vdisplay = 480,
 102                 .vsync_start = 480 + 3,
 103                 .vsync_end = 480 + 3 + 2,
 104                 .vtotal = 480 + 3 + 2 + 17,
 105                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
 106                          DRM_MODE_FLAG_INTERLACE,
 107         },
 108         .video_info = 0x00040080,
 109         .video_res = 0x05a8375a,
 110         .field1_param = 0x00041817,
 111         .field2_param = 0x0008351e,
 112         .burst_line_odd1 = 0x00041006,
 113         .burst_line_even1 = 0x0008290d,
 114         .burst_line_odd2 = 0x00000000,
 115         .burst_line_even2 = 0x00000000,
 116         .line_timing_param = 0x06a8ef9e,
 117         .weight_value = 0x00b68197,
 118         .blank_black_level = 0x0000f0f0,
 119         .burst_level = 0x0000009c,
 120         .control_param = 0x00000001,
 121         .sub_carrier_phase1 = 0x10f83e10,
 122         .phase_line_incr_cvbs = 0x80000000,
 123 };
 124
 125 static const struct zx_tvenc_mode *tvenc_modes[] = {
 126         &tvenc_mode_pal,
 127         &tvenc_mode_ntsc,
 128 };
 129
 130 static const struct zx_tvenc_mode *
 131 zx_tvenc_find_zmode(struct drm_display_mode *mode)
 132 {
 133         int i;
 134
 135         for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
 136                 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
 137
 138                 if (drm_mode_equal(mode, &zmode->mode))
 139                         return zmode;
 140         }
 141
 142         return NULL;
 143 }
 144
 145 static void zx_tvenc_encoder_mode_set(struct drm_encoder *encoder,
 146                                       struct drm_display_mode *mode,
 147                                       struct drm_display_mode *adj_mode)
 148 {
 149         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 150         const struct zx_tvenc_mode *zmode;
 151         struct vou_div_config configs[] = {
 152                 { VOU_DIV_INF,   VOU_DIV_4 },
 153                 { VOU_DIV_TVENC, VOU_DIV_1 },
 154                 { VOU_DIV_LAYER, VOU_DIV_2 },
 155         };
 156
 157         zx_vou_config_dividers(encoder->crtc, configs, ARRAY_SIZE(configs));
 158
 159         zmode = zx_tvenc_find_zmode(mode);
 160         if (!zmode) {
 161                 DRM_DEV_ERROR(tvenc->dev, "failed to find zmode\n");
 162                 return;
 163         }
 164
 165         zx_writel(tvenc->mmio + VENC_VIDEO_INFO, zmode->video_info);
 166         zx_writel(tvenc->mmio + VENC_VIDEO_RES, zmode->video_res);
 167         zx_writel(tvenc->mmio + VENC_FIELD1_PARAM, zmode->field1_param);
 168         zx_writel(tvenc->mmio + VENC_FIELD2_PARAM, zmode->field2_param);
 169         zx_writel(tvenc->mmio + VENC_LINE_O_1, zmode->burst_line_odd1);
 170         zx_writel(tvenc->mmio + VENC_LINE_E_1, zmode->burst_line_even1);
 171         zx_writel(tvenc->mmio + VENC_LINE_O_2, zmode->burst_line_odd2);
 172         zx_writel(tvenc->mmio + VENC_LINE_E_2, zmode->burst_line_even2);
 173         zx_writel(tvenc->mmio + VENC_LINE_TIMING_PARAM,
 174                   zmode->line_timing_param);
 175         zx_writel(tvenc->mmio + VENC_WEIGHT_VALUE, zmode->weight_value);
 176         zx_writel(tvenc->mmio + VENC_BLANK_BLACK_LEVEL,
 177                   zmode->blank_black_level);
 178         zx_writel(tvenc->mmio + VENC_BURST_LEVEL, zmode->burst_level);
 179         zx_writel(tvenc->mmio + VENC_CONTROL_PARAM, zmode->control_param);
 180         zx_writel(tvenc->mmio + VENC_SUB_CARRIER_PHASE1,
 181                   zmode->sub_carrier_phase1);
 182         zx_writel(tvenc->mmio + VENC_PHASE_LINE_INCR_CVBS,
 183                   zmode->phase_line_incr_cvbs);
 184 }
 185
 186 static void zx_tvenc_encoder_enable(struct drm_encoder *encoder)
 187 {
 188         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 189         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 190
 191         /* Set bit to power up TVENC DAC */
 192         regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
 193                            pwrctrl->mask);
 194
 195         vou_inf_enable(VOU_TV_ENC, encoder->crtc);
 196
 197         zx_writel(tvenc->mmio + VENC_ENABLE, 1);
 198 }
 199
 200 static void zx_tvenc_encoder_disable(struct drm_encoder *encoder)
 201 {
 202         struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
 203         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 204
 205         zx_writel(tvenc->mmio + VENC_ENABLE, 0);
 206
 207         vou_inf_disable(VOU_TV_ENC, encoder->crtc);
 208
 209         /* Clear bit to power down TVENC DAC */
 210         regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
 211 }
 212
 213 static const struct drm_encoder_helper_funcs zx_tvenc_encoder_helper_funcs = {
 214         .enable = zx_tvenc_encoder_enable,
 215         .disable = zx_tvenc_encoder_disable,
 216         .mode_set = zx_tvenc_encoder_mode_set,
 217 };
 218
 219 static const struct drm_encoder_funcs zx_tvenc_encoder_funcs = {
 220         .destroy = drm_encoder_cleanup,
 221 };
 222
 223 static int zx_tvenc_connector_get_modes(struct drm_connector *connector)
 224 {
 225         struct zx_tvenc *tvenc = to_zx_tvenc(connector);
 226         struct device *dev = tvenc->dev;
 227         int i;
 228
 229         for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
 230                 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
 231                 struct drm_display_mode *mode;
 232
 233                 mode = drm_mode_duplicate(connector->dev, &zmode->mode);
 234                 if (!mode) {
 235                         DRM_DEV_ERROR(dev, "failed to duplicate drm mode\n");
 236                         continue;
 237                 }
 238
 239                 drm_mode_set_name(mode);
 240                 drm_mode_probed_add(connector, mode);
 241         }
 242
 243         return i;
 244 }
 245
 246 static enum drm_mode_status
 247 zx_tvenc_connector_mode_valid(struct drm_connector *connector,
 248                               struct drm_display_mode *mode)
 249 {
 250         struct zx_tvenc *tvenc = to_zx_tvenc(connector);
 251         const struct zx_tvenc_mode *zmode;
 252
 253         zmode = zx_tvenc_find_zmode(mode);
 254         if (!zmode) {
 255                 DRM_DEV_ERROR(tvenc->dev, "unsupported mode: %s\n", mode->name);
 256                 return MODE_NOMODE;
 257         }
 258
 259         return MODE_OK;
 260 }
 261
 262 static struct drm_connector_helper_funcs zx_tvenc_connector_helper_funcs = {
 263         .get_modes = zx_tvenc_connector_get_modes,
 264         .mode_valid = zx_tvenc_connector_mode_valid,
 265 };
 266
 267 static const struct drm_connector_funcs zx_tvenc_connector_funcs = {
 268         .fill_modes = drm_helper_probe_single_connector_modes,
 269         .destroy = drm_connector_cleanup,
 270         .reset = drm_atomic_helper_connector_reset,
 271         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 272         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 273 };
 274
 275 static int zx_tvenc_register(struct drm_device *drm, struct zx_tvenc *tvenc)
 276 {
 277         struct drm_encoder *encoder = &tvenc->encoder;
 278         struct drm_connector *connector = &tvenc->connector;
 279
 280         /*
 281          * The tvenc is designed to use aux channel, as there is a deflicker
 282          * block for the channel.
 283          */
 284         encoder->possible_crtcs = BIT(1);
 285
 286         drm_encoder_init(drm, encoder, &zx_tvenc_encoder_funcs,
 287                          DRM_MODE_ENCODER_TVDAC, NULL);
 288         drm_encoder_helper_add(encoder, &zx_tvenc_encoder_helper_funcs);
 289
 290         connector->interlace_allowed = true;
 291
 292         drm_connector_init(drm, connector, &zx_tvenc_connector_funcs,
 293                            DRM_MODE_CONNECTOR_Composite);
 294         drm_connector_helper_add(connector, &zx_tvenc_connector_helper_funcs);
 295
 296         drm_connector_attach_encoder(connector, encoder);
 297
 298         return 0;
 299 }
 300
 301 static int zx_tvenc_pwrctrl_init(struct zx_tvenc *tvenc)
 302 {
 303         struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
 304         struct device *dev = tvenc->dev;
 305         struct of_phandle_args out_args;
 306         struct regmap *regmap;
 307         int ret;
 308
 309         ret = of_parse_phandle_with_fixed_args(dev->of_node,
 310                                 "zte,tvenc-power-control", 2, 0, &out_args);
 311         if (ret)
 312                 return ret;
 313
 314         regmap = syscon_node_to_regmap(out_args.np);
 315         if (IS_ERR(regmap)) {
 316                 ret = PTR_ERR(regmap);
 317                 goto out;
 318         }
 319
 320         pwrctrl->regmap = regmap;
 321         pwrctrl->reg = out_args.args[0];
 322         pwrctrl->mask = out_args.args[1];
 323
 324 out:
 325         of_node_put(out_args.np);
 326         return ret;
 327 }
 328
 329 static int zx_tvenc_bind(struct device *dev, struct device *master, void *data)
 330 {
 331         struct platform_device *pdev = to_platform_device(dev);
 332         struct drm_device *drm = data;
 333         struct resource *res;
 334         struct zx_tvenc *tvenc;
 335         int ret;
 336
 337         tvenc = devm_kzalloc(dev, sizeof(*tvenc), GFP_KERNEL);
 338         if (!tvenc)
 339                 return -ENOMEM;
 340
 341         tvenc->dev = dev;
 342         dev_set_drvdata(dev, tvenc);
 343
 344         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 345         tvenc->mmio = devm_ioremap_resource(dev, res);
 346         if (IS_ERR(tvenc->mmio)) {
 347                 ret = PTR_ERR(tvenc->mmio);
 348                 DRM_DEV_ERROR(dev, "failed to remap tvenc region: %d\n", ret);
 349                 return ret;
 350         }
 351
 352         ret = zx_tvenc_pwrctrl_init(tvenc);
 353         if (ret) {
 354                 DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
 355                 return ret;
 356         }
 357
 358         ret = zx_tvenc_register(drm, tvenc);
 359         if (ret) {
 360                 DRM_DEV_ERROR(dev, "failed to register tvenc: %d\n", ret);
 361                 return ret;
 362         }
 363
 364         return 0;
 365 }
 366
 367 static void zx_tvenc_unbind(struct device *dev, struct device *master,
 368                             void *data)
 369 {
 370         /* Nothing to do */
 371 }
 372
 373 static const struct component_ops zx_tvenc_component_ops = {
 374         .bind = zx_tvenc_bind,
 375         .unbind = zx_tvenc_unbind,
 376 };
 377
 378 static int zx_tvenc_probe(struct platform_device *pdev)
 379 {
 380         return component_add(&pdev->dev, &zx_tvenc_component_ops);
 381 }
 382
 383 static int zx_tvenc_remove(struct platform_device *pdev)
 384 {
 385         component_del(&pdev->dev, &zx_tvenc_component_ops);
 386         return 0;
 387 }
 388
 389 static const struct of_device_id zx_tvenc_of_match[] = {
 390         { .compatible = "zte,zx296718-tvenc", },
 391         { /* end */ },
 392 };
 393 MODULE_DEVICE_TABLE(of, zx_tvenc_of_match);
 394
 395 struct platform_driver zx_tvenc_driver = {
 396         .probe = zx_tvenc_probe,
 397         .remove = zx_tvenc_remove,
 398         .driver = {
 399                 .name = "zx-tvenc",
 400                 .of_match_table = zx_tvenc_of_match,
 401         },
 402 };