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