drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   4  * Copyright (C) 2013 Red Hat
   5  * Author: Rob Clark <robdclark@gmail.com>
   6  */
   7
   8 #include <drm/drm_crtc.h>
   9 #include <drm/drm_probe_helper.h>
  10
  11 #include "mdp5_kms.h"
  12
  13 static struct mdp5_kms *get_kms(struct drm_encoder *encoder)
  14 {
  15         struct msm_drm_private *priv = encoder->dev->dev_private;
  16         return to_mdp5_kms(to_mdp_kms(priv->kms));
  17 }
  18
  19 #ifdef DOWNSTREAM_CONFIG_MSM_BUS_SCALING
  20 #include <mach/board.h>
  21 #include <mach/msm_bus.h>
  22 #include <mach/msm_bus_board.h>
  23 #define MDP_BUS_VECTOR_ENTRY(ab_val, ib_val)            \
  24         {                                               \
  25                 .src = MSM_BUS_MASTER_MDP_PORT0,        \
  26                 .dst = MSM_BUS_SLAVE_EBI_CH0,           \
  27                 .ab = (ab_val),                         \
  28                 .ib = (ib_val),                         \
  29         }
  30
  31 static struct msm_bus_vectors mdp_bus_vectors[] = {
  32         MDP_BUS_VECTOR_ENTRY(0, 0),
  33         MDP_BUS_VECTOR_ENTRY(2000000000, 2000000000),
  34 };
  35 static struct msm_bus_paths mdp_bus_usecases[] = { {
  36                 .num_paths = 1,
  37                 .vectors = &mdp_bus_vectors[0],
  38 }, {
  39                 .num_paths = 1,
  40                 .vectors = &mdp_bus_vectors[1],
  41 } };
  42 static struct msm_bus_scale_pdata mdp_bus_scale_table = {
  43         .usecase = mdp_bus_usecases,
  44         .num_usecases = ARRAY_SIZE(mdp_bus_usecases),
  45         .name = "mdss_mdp",
  46 };
  47
  48 static void bs_init(struct mdp5_encoder *mdp5_encoder)
  49 {
  50         mdp5_encoder->bsc = msm_bus_scale_register_client(
  51                         &mdp_bus_scale_table);
  52         DBG("bus scale client: %08x", mdp5_encoder->bsc);
  53 }
  54
  55 static void bs_fini(struct mdp5_encoder *mdp5_encoder)
  56 {
  57         if (mdp5_encoder->bsc) {
  58                 msm_bus_scale_unregister_client(mdp5_encoder->bsc);
  59                 mdp5_encoder->bsc = 0;
  60         }
  61 }
  62
  63 static void bs_set(struct mdp5_encoder *mdp5_encoder, int idx)
  64 {
  65         if (mdp5_encoder->bsc) {
  66                 DBG("set bus scaling: %d", idx);
  67                 /* HACK: scaling down, and then immediately back up
  68                  * seems to leave things broken (underflow).. so
  69                  * never disable:
  70                  */
  71                 idx = 1;
  72                 msm_bus_scale_client_update_request(mdp5_encoder->bsc, idx);
  73         }
  74 }
  75 #else
  76 static void bs_init(struct mdp5_encoder *mdp5_encoder) {}
  77 static void bs_fini(struct mdp5_encoder *mdp5_encoder) {}
  78 static void bs_set(struct mdp5_encoder *mdp5_encoder, int idx) {}
  79 #endif
  80
  81 static void mdp5_encoder_destroy(struct drm_encoder *encoder)
  82 {
  83         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
  84         bs_fini(mdp5_encoder);
  85         drm_encoder_cleanup(encoder);
  86         kfree(mdp5_encoder);
  87 }
  88
  89 static const struct drm_encoder_funcs mdp5_encoder_funcs = {
  90         .destroy = mdp5_encoder_destroy,
  91 };
  92
  93 static void mdp5_vid_encoder_mode_set(struct drm_encoder *encoder,
  94                                       struct drm_display_mode *mode,
  95                                       struct drm_display_mode *adjusted_mode)
  96 {
  97         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
  98         struct mdp5_kms *mdp5_kms = get_kms(encoder);
  99         struct drm_device *dev = encoder->dev;
 100         struct drm_connector *connector;
 101         int intf = mdp5_encoder->intf->num;
 102         uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
 103         uint32_t display_v_start, display_v_end;
 104         uint32_t hsync_start_x, hsync_end_x;
 105         uint32_t format = 0x2100;
 106         unsigned long flags;
 107
 108         mode = adjusted_mode;
 109
 110         DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 111
 112         ctrl_pol = 0;
 113
 114         /* DSI controller cannot handle active-low sync signals. */
 115         if (mdp5_encoder->intf->type != INTF_DSI) {
 116                 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 117                         ctrl_pol |= MDP5_INTF_POLARITY_CTL_HSYNC_LOW;
 118                 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 119                         ctrl_pol |= MDP5_INTF_POLARITY_CTL_VSYNC_LOW;
 120         }
 121         /* probably need to get DATA_EN polarity from panel.. */
 122
 123         dtv_hsync_skew = 0;  /* get this from panel? */
 124
 125         /* Get color format from panel, default is 8bpc */
 126         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 127                 if (connector->encoder == encoder) {
 128                         switch (connector->display_info.bpc) {
 129                         case 4:
 130                                 format |= 0;
 131                                 break;
 132                         case 5:
 133                                 format |= 0x15;
 134                                 break;
 135                         case 6:
 136                                 format |= 0x2A;
 137                                 break;
 138                         case 8:
 139                         default:
 140                                 format |= 0x3F;
 141                                 break;
 142                         }
 143                         break;
 144                 }
 145         }
 146
 147         hsync_start_x = (mode->htotal - mode->hsync_start);
 148         hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
 149
 150         vsync_period = mode->vtotal * mode->htotal;
 151         vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
 152         display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dtv_hsync_skew;
 153         display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dtv_hsync_skew - 1;
 154
 155         /*
 156          * For edp only:
 157          * DISPLAY_V_START = (VBP * HCYCLE) + HBP
 158          * DISPLAY_V_END = (VBP + VACTIVE) * HCYCLE - 1 - HFP
 159          */
 160         if (mdp5_encoder->intf->type == INTF_eDP) {
 161                 display_v_start += mode->htotal - mode->hsync_start;
 162                 display_v_end -= mode->hsync_start - mode->hdisplay;
 163         }
 164
 165         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 166
 167         mdp5_write(mdp5_kms, REG_MDP5_INTF_HSYNC_CTL(intf),
 168                         MDP5_INTF_HSYNC_CTL_PULSEW(mode->hsync_end - mode->hsync_start) |
 169                         MDP5_INTF_HSYNC_CTL_PERIOD(mode->htotal));
 170         mdp5_write(mdp5_kms, REG_MDP5_INTF_VSYNC_PERIOD_F0(intf), vsync_period);
 171         mdp5_write(mdp5_kms, REG_MDP5_INTF_VSYNC_LEN_F0(intf), vsync_len);
 172         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_HCTL(intf),
 173                         MDP5_INTF_DISPLAY_HCTL_START(hsync_start_x) |
 174                         MDP5_INTF_DISPLAY_HCTL_END(hsync_end_x));
 175         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_VSTART_F0(intf), display_v_start);
 176         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_VEND_F0(intf), display_v_end);
 177         mdp5_write(mdp5_kms, REG_MDP5_INTF_BORDER_COLOR(intf), 0);
 178         mdp5_write(mdp5_kms, REG_MDP5_INTF_UNDERFLOW_COLOR(intf), 0xff);
 179         mdp5_write(mdp5_kms, REG_MDP5_INTF_HSYNC_SKEW(intf), dtv_hsync_skew);
 180         mdp5_write(mdp5_kms, REG_MDP5_INTF_POLARITY_CTL(intf), ctrl_pol);
 181         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_HCTL(intf),
 182                         MDP5_INTF_ACTIVE_HCTL_START(0) |
 183                         MDP5_INTF_ACTIVE_HCTL_END(0));
 184         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_VSTART_F0(intf), 0);
 185         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_VEND_F0(intf), 0);
 186         mdp5_write(mdp5_kms, REG_MDP5_INTF_PANEL_FORMAT(intf), format);
 187         mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(intf), 0x3);  /* frame+line? */
 188
 189         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 190
 191         mdp5_crtc_set_pipeline(encoder->crtc);
 192 }
 193
 194 static void mdp5_vid_encoder_disable(struct drm_encoder *encoder)
 195 {
 196         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 197         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 198         struct mdp5_ctl *ctl = mdp5_encoder->ctl;
 199         struct mdp5_pipeline *pipeline = mdp5_crtc_get_pipeline(encoder->crtc);
 200         struct mdp5_hw_mixer *mixer = mdp5_crtc_get_mixer(encoder->crtc);
 201         struct mdp5_interface *intf = mdp5_encoder->intf;
 202         int intfn = mdp5_encoder->intf->num;
 203         unsigned long flags;
 204
 205         if (WARN_ON(!mdp5_encoder->enabled))
 206                 return;
 207
 208         mdp5_ctl_set_encoder_state(ctl, pipeline, false);
 209
 210         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 211         mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(intfn), 0);
 212         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 213         mdp5_ctl_commit(ctl, pipeline, mdp_ctl_flush_mask_encoder(intf), true);
 214
 215         /*
 216          * Wait for a vsync so we know the ENABLE=0 latched before
 217          * the (connector) source of the vsync's gets disabled,
 218          * otherwise we end up in a funny state if we re-enable
 219          * before the disable latches, which results that some of
 220          * the settings changes for the new modeset (like new
 221          * scanout buffer) don't latch properly..
 222          */
 223         mdp_irq_wait(&mdp5_kms->base, intf2vblank(mixer, intf));
 224
 225         bs_set(mdp5_encoder, 0);
 226
 227         mdp5_encoder->enabled = false;
 228 }
 229
 230 static void mdp5_vid_encoder_enable(struct drm_encoder *encoder)
 231 {
 232         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 233         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 234         struct mdp5_ctl *ctl = mdp5_encoder->ctl;
 235         struct mdp5_interface *intf = mdp5_encoder->intf;
 236         struct mdp5_pipeline *pipeline = mdp5_crtc_get_pipeline(encoder->crtc);
 237         int intfn = intf->num;
 238         unsigned long flags;
 239
 240         if (WARN_ON(mdp5_encoder->enabled))
 241                 return;
 242
 243         bs_set(mdp5_encoder, 1);
 244         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 245         mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(intfn), 1);
 246         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 247         mdp5_ctl_commit(ctl, pipeline, mdp_ctl_flush_mask_encoder(intf), true);
 248
 249         mdp5_ctl_set_encoder_state(ctl, pipeline, true);
 250
 251         mdp5_encoder->enabled = true;
 252 }
 253
 254 static void mdp5_encoder_mode_set(struct drm_encoder *encoder,
 255                                   struct drm_display_mode *mode,
 256                                   struct drm_display_mode *adjusted_mode)
 257 {
 258         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 259         struct mdp5_interface *intf = mdp5_encoder->intf;
 260
 261         if (intf->mode == MDP5_INTF_DSI_MODE_COMMAND)
 262                 mdp5_cmd_encoder_mode_set(encoder, mode, adjusted_mode);
 263         else
 264                 mdp5_vid_encoder_mode_set(encoder, mode, adjusted_mode);
 265 }
 266
 267 static void mdp5_encoder_disable(struct drm_encoder *encoder)
 268 {
 269         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 270         struct mdp5_interface *intf = mdp5_encoder->intf;
 271
 272         if (intf->mode == MDP5_INTF_DSI_MODE_COMMAND)
 273                 mdp5_cmd_encoder_disable(encoder);
 274         else
 275                 mdp5_vid_encoder_disable(encoder);
 276 }
 277
 278 static void mdp5_encoder_enable(struct drm_encoder *encoder)
 279 {
 280         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 281         struct mdp5_interface *intf = mdp5_encoder->intf;
 282         /* this isn't right I think */
 283         struct drm_crtc_state *cstate = encoder->crtc->state;
 284
 285         mdp5_encoder_mode_set(encoder, &cstate->mode, &cstate->adjusted_mode);
 286
 287         if (intf->mode == MDP5_INTF_DSI_MODE_COMMAND)
 288                 mdp5_cmd_encoder_enable(encoder);
 289         else
 290                 mdp5_vid_encoder_enable(encoder);
 291 }
 292
 293 static int mdp5_encoder_atomic_check(struct drm_encoder *encoder,
 294                                      struct drm_crtc_state *crtc_state,
 295                                      struct drm_connector_state *conn_state)
 296 {
 297         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 298         struct mdp5_crtc_state *mdp5_cstate = to_mdp5_crtc_state(crtc_state);
 299         struct mdp5_interface *intf = mdp5_encoder->intf;
 300         struct mdp5_ctl *ctl = mdp5_encoder->ctl;
 301
 302         mdp5_cstate->ctl = ctl;
 303         mdp5_cstate->pipeline.intf = intf;
 304
 305         /*
 306          * This is a bit awkward, but we want to flush the CTL and hit the
 307          * START bit at most once for an atomic update.  In the non-full-
 308          * modeset case, this is done from crtc->atomic_flush(), but that
 309          * is too early in the case of full modeset, in which case we
 310          * defer to encoder->enable().  But we need to *know* whether
 311          * encoder->enable() will be called to do this:
 312          */
 313         if (drm_atomic_crtc_needs_modeset(crtc_state))
 314                 mdp5_cstate->defer_start = true;
 315
 316         return 0;
 317 }
 318
 319 static const struct drm_encoder_helper_funcs mdp5_encoder_helper_funcs = {
 320         .disable = mdp5_encoder_disable,
 321         .enable = mdp5_encoder_enable,
 322         .atomic_check = mdp5_encoder_atomic_check,
 323 };
 324
 325 int mdp5_encoder_get_linecount(struct drm_encoder *encoder)
 326 {
 327         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 328         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 329         int intf = mdp5_encoder->intf->num;
 330
 331         return mdp5_read(mdp5_kms, REG_MDP5_INTF_LINE_COUNT(intf));
 332 }
 333
 334 u32 mdp5_encoder_get_framecount(struct drm_encoder *encoder)
 335 {
 336         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 337         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 338         int intf = mdp5_encoder->intf->num;
 339
 340         return mdp5_read(mdp5_kms, REG_MDP5_INTF_FRAME_COUNT(intf));
 341 }
 342
 343 int mdp5_vid_encoder_set_split_display(struct drm_encoder *encoder,
 344                                        struct drm_encoder *slave_encoder)
 345 {
 346         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 347         struct mdp5_encoder *mdp5_slave_enc = to_mdp5_encoder(slave_encoder);
 348         struct mdp5_kms *mdp5_kms;
 349         struct device *dev;
 350         int intf_num;
 351         u32 data = 0;
 352
 353         if (!encoder || !slave_encoder)
 354                 return -EINVAL;
 355
 356         mdp5_kms = get_kms(encoder);
 357         intf_num = mdp5_encoder->intf->num;
 358
 359         /* Switch slave encoder's TimingGen Sync mode,
 360          * to use the master's enable signal for the slave encoder.
 361          */
 362         if (intf_num == 1)
 363                 data |= MDP5_SPLIT_DPL_LOWER_INTF2_TG_SYNC;
 364         else if (intf_num == 2)
 365                 data |= MDP5_SPLIT_DPL_LOWER_INTF1_TG_SYNC;
 366         else
 367                 return -EINVAL;
 368
 369         dev = &mdp5_kms->pdev->dev;
 370         /* Make sure clocks are on when connectors calling this function. */
 371         pm_runtime_get_sync(dev);
 372
 373         /* Dumb Panel, Sync mode */
 374         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_UPPER, 0);
 375         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_LOWER, data);
 376         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_EN, 1);
 377
 378         mdp5_ctl_pair(mdp5_encoder->ctl, mdp5_slave_enc->ctl, true);
 379
 380         pm_runtime_put_sync(dev);
 381
 382         return 0;
 383 }
 384
 385 void mdp5_encoder_set_intf_mode(struct drm_encoder *encoder, bool cmd_mode)
 386 {
 387         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 388         struct mdp5_interface *intf = mdp5_encoder->intf;
 389
 390         /* TODO: Expand this to set writeback modes too */
 391         if (cmd_mode) {
 392                 WARN_ON(intf->type != INTF_DSI);
 393                 intf->mode = MDP5_INTF_DSI_MODE_COMMAND;
 394         } else {
 395                 if (intf->type == INTF_DSI)
 396                         intf->mode = MDP5_INTF_DSI_MODE_VIDEO;
 397                 else
 398                         intf->mode = MDP5_INTF_MODE_NONE;
 399         }
 400 }
 401
 402 /* initialize encoder */
 403 struct drm_encoder *mdp5_encoder_init(struct drm_device *dev,
 404                                       struct mdp5_interface *intf,
 405                                       struct mdp5_ctl *ctl)
 406 {
 407         struct drm_encoder *encoder = NULL;
 408         struct mdp5_encoder *mdp5_encoder;
 409         int enc_type = (intf->type == INTF_DSI) ?
 410                 DRM_MODE_ENCODER_DSI : DRM_MODE_ENCODER_TMDS;
 411         int ret;
 412
 413         mdp5_encoder = kzalloc(sizeof(*mdp5_encoder), GFP_KERNEL);
 414         if (!mdp5_encoder) {
 415                 ret = -ENOMEM;
 416                 goto fail;
 417         }
 418
 419         encoder = &mdp5_encoder->base;
 420         mdp5_encoder->ctl = ctl;
 421         mdp5_encoder->intf = intf;
 422
 423         spin_lock_init(&mdp5_encoder->intf_lock);
 424
 425         drm_encoder_init(dev, encoder, &mdp5_encoder_funcs, enc_type, NULL);
 426
 427         drm_encoder_helper_add(encoder, &mdp5_encoder_helper_funcs);
 428
 429         bs_init(mdp5_encoder);
 430
 431         return encoder;
 432
 433 fail:
 434         if (encoder)
 435                 mdp5_encoder_destroy(encoder);
 436
 437         return ERR_PTR(ret);
 438 }