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