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

   1 /*
   2  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "mdp5_kms.h"
  20
  21 #include "drm_crtc.h"
  22 #include "drm_crtc_helper.h"
  23
  24 struct mdp5_encoder {
  25         struct drm_encoder base;
  26         struct mdp5_interface intf;
  27         spinlock_t intf_lock;   /* protect REG_MDP5_INTF_* registers */
  28         bool enabled;
  29         uint32_t bsc;
  30 };
  31 #define to_mdp5_encoder(x) container_of(x, struct mdp5_encoder, base)
  32
  33 static struct mdp5_kms *get_kms(struct drm_encoder *encoder)
  34 {
  35         struct msm_drm_private *priv = encoder->dev->dev_private;
  36         return to_mdp5_kms(to_mdp_kms(priv->kms));
  37 }
  38
  39 #ifdef CONFIG_MSM_BUS_SCALING
  40 #include <mach/board.h>
  41 #include <mach/msm_bus.h>
  42 #include <mach/msm_bus_board.h>
  43 #define MDP_BUS_VECTOR_ENTRY(ab_val, ib_val)            \
  44         {                                               \
  45                 .src = MSM_BUS_MASTER_MDP_PORT0,        \
  46                 .dst = MSM_BUS_SLAVE_EBI_CH0,           \
  47                 .ab = (ab_val),                         \
  48                 .ib = (ib_val),                         \
  49         }
  50
  51 static struct msm_bus_vectors mdp_bus_vectors[] = {
  52         MDP_BUS_VECTOR_ENTRY(0, 0),
  53         MDP_BUS_VECTOR_ENTRY(2000000000, 2000000000),
  54 };
  55 static struct msm_bus_paths mdp_bus_usecases[] = { {
  56                 .num_paths = 1,
  57                 .vectors = &mdp_bus_vectors[0],
  58 }, {
  59                 .num_paths = 1,
  60                 .vectors = &mdp_bus_vectors[1],
  61 } };
  62 static struct msm_bus_scale_pdata mdp_bus_scale_table = {
  63         .usecase = mdp_bus_usecases,
  64         .num_usecases = ARRAY_SIZE(mdp_bus_usecases),
  65         .name = "mdss_mdp",
  66 };
  67
  68 static void bs_init(struct mdp5_encoder *mdp5_encoder)
  69 {
  70         mdp5_encoder->bsc = msm_bus_scale_register_client(
  71                         &mdp_bus_scale_table);
  72         DBG("bus scale client: %08x", mdp5_encoder->bsc);
  73 }
  74
  75 static void bs_fini(struct mdp5_encoder *mdp5_encoder)
  76 {
  77         if (mdp5_encoder->bsc) {
  78                 msm_bus_scale_unregister_client(mdp5_encoder->bsc);
  79                 mdp5_encoder->bsc = 0;
  80         }
  81 }
  82
  83 static void bs_set(struct mdp5_encoder *mdp5_encoder, int idx)
  84 {
  85         if (mdp5_encoder->bsc) {
  86                 DBG("set bus scaling: %d", idx);
  87                 /* HACK: scaling down, and then immediately back up
  88                  * seems to leave things broken (underflow).. so
  89                  * never disable:
  90                  */
  91                 idx = 1;
  92                 msm_bus_scale_client_update_request(mdp5_encoder->bsc, idx);
  93         }
  94 }
  95 #else
  96 static void bs_init(struct mdp5_encoder *mdp5_encoder) {}
  97 static void bs_fini(struct mdp5_encoder *mdp5_encoder) {}
  98 static void bs_set(struct mdp5_encoder *mdp5_encoder, int idx) {}
  99 #endif
 100
 101 static void mdp5_encoder_destroy(struct drm_encoder *encoder)
 102 {
 103         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 104         bs_fini(mdp5_encoder);
 105         drm_encoder_cleanup(encoder);
 106         kfree(mdp5_encoder);
 107 }
 108
 109 static const struct drm_encoder_funcs mdp5_encoder_funcs = {
 110         .destroy = mdp5_encoder_destroy,
 111 };
 112
 113 static bool mdp5_encoder_mode_fixup(struct drm_encoder *encoder,
 114                 const struct drm_display_mode *mode,
 115                 struct drm_display_mode *adjusted_mode)
 116 {
 117         return true;
 118 }
 119
 120 static void mdp5_encoder_mode_set(struct drm_encoder *encoder,
 121                 struct drm_display_mode *mode,
 122                 struct drm_display_mode *adjusted_mode)
 123 {
 124         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 125         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 126         struct drm_device *dev = encoder->dev;
 127         struct drm_connector *connector;
 128         int intf = mdp5_encoder->intf.num;
 129         uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
 130         uint32_t display_v_start, display_v_end;
 131         uint32_t hsync_start_x, hsync_end_x;
 132         uint32_t format = 0x2100;
 133         unsigned long flags;
 134
 135         mode = adjusted_mode;
 136
 137         DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 138                         mode->base.id, mode->name,
 139                         mode->vrefresh, mode->clock,
 140                         mode->hdisplay, mode->hsync_start,
 141                         mode->hsync_end, mode->htotal,
 142                         mode->vdisplay, mode->vsync_start,
 143                         mode->vsync_end, mode->vtotal,
 144                         mode->type, mode->flags);
 145
 146         ctrl_pol = 0;
 147         if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 148                 ctrl_pol |= MDP5_INTF_POLARITY_CTL_HSYNC_LOW;
 149         if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 150                 ctrl_pol |= MDP5_INTF_POLARITY_CTL_VSYNC_LOW;
 151         /* probably need to get DATA_EN polarity from panel.. */
 152
 153         dtv_hsync_skew = 0;  /* get this from panel? */
 154
 155         /* Get color format from panel, default is 8bpc */
 156         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 157                 if (connector->encoder == encoder) {
 158                         switch (connector->display_info.bpc) {
 159                         case 4:
 160                                 format |= 0;
 161                                 break;
 162                         case 5:
 163                                 format |= 0x15;
 164                                 break;
 165                         case 6:
 166                                 format |= 0x2A;
 167                                 break;
 168                         case 8:
 169                         default:
 170                                 format |= 0x3F;
 171                                 break;
 172                         }
 173                         break;
 174                 }
 175         }
 176
 177         hsync_start_x = (mode->htotal - mode->hsync_start);
 178         hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
 179
 180         vsync_period = mode->vtotal * mode->htotal;
 181         vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
 182         display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dtv_hsync_skew;
 183         display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dtv_hsync_skew - 1;
 184
 185         /*
 186          * For edp only:
 187          * DISPLAY_V_START = (VBP * HCYCLE) + HBP
 188          * DISPLAY_V_END = (VBP + VACTIVE) * HCYCLE - 1 - HFP
 189          */
 190         if (mdp5_encoder->intf.type == INTF_eDP) {
 191                 display_v_start += mode->htotal - mode->hsync_start;
 192                 display_v_end -= mode->hsync_start - mode->hdisplay;
 193         }
 194
 195         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 196
 197         mdp5_write(mdp5_kms, REG_MDP5_INTF_HSYNC_CTL(intf),
 198                         MDP5_INTF_HSYNC_CTL_PULSEW(mode->hsync_end - mode->hsync_start) |
 199                         MDP5_INTF_HSYNC_CTL_PERIOD(mode->htotal));
 200         mdp5_write(mdp5_kms, REG_MDP5_INTF_VSYNC_PERIOD_F0(intf), vsync_period);
 201         mdp5_write(mdp5_kms, REG_MDP5_INTF_VSYNC_LEN_F0(intf), vsync_len);
 202         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_HCTL(intf),
 203                         MDP5_INTF_DISPLAY_HCTL_START(hsync_start_x) |
 204                         MDP5_INTF_DISPLAY_HCTL_END(hsync_end_x));
 205         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_VSTART_F0(intf), display_v_start);
 206         mdp5_write(mdp5_kms, REG_MDP5_INTF_DISPLAY_VEND_F0(intf), display_v_end);
 207         mdp5_write(mdp5_kms, REG_MDP5_INTF_BORDER_COLOR(intf), 0);
 208         mdp5_write(mdp5_kms, REG_MDP5_INTF_UNDERFLOW_COLOR(intf), 0xff);
 209         mdp5_write(mdp5_kms, REG_MDP5_INTF_HSYNC_SKEW(intf), dtv_hsync_skew);
 210         mdp5_write(mdp5_kms, REG_MDP5_INTF_POLARITY_CTL(intf), ctrl_pol);
 211         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_HCTL(intf),
 212                         MDP5_INTF_ACTIVE_HCTL_START(0) |
 213                         MDP5_INTF_ACTIVE_HCTL_END(0));
 214         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_VSTART_F0(intf), 0);
 215         mdp5_write(mdp5_kms, REG_MDP5_INTF_ACTIVE_VEND_F0(intf), 0);
 216         mdp5_write(mdp5_kms, REG_MDP5_INTF_PANEL_FORMAT(intf), format);
 217         mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(intf), 0x3);  /* frame+line? */
 218
 219         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 220
 221         mdp5_crtc_set_intf(encoder->crtc, &mdp5_encoder->intf);
 222 }
 223
 224 static void mdp5_encoder_disable(struct drm_encoder *encoder)
 225 {
 226         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 227         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 228         struct mdp5_ctl *ctl = mdp5_crtc_get_ctl(encoder->crtc);
 229         int lm = mdp5_crtc_get_lm(encoder->crtc);
 230         struct mdp5_interface *intf = &mdp5_encoder->intf;
 231         int intfn = mdp5_encoder->intf.num;
 232         unsigned long flags;
 233
 234         if (WARN_ON(!mdp5_encoder->enabled))
 235                 return;
 236
 237         mdp5_ctl_set_encoder_state(ctl, false);
 238
 239         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 240         mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(intfn), 0);
 241         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 242         mdp5_ctl_commit(ctl, mdp_ctl_flush_mask_encoder(intf));
 243
 244         /*
 245          * Wait for a vsync so we know the ENABLE=0 latched before
 246          * the (connector) source of the vsync's gets disabled,
 247          * otherwise we end up in a funny state if we re-enable
 248          * before the disable latches, which results that some of
 249          * the settings changes for the new modeset (like new
 250          * scanout buffer) don't latch properly..
 251          */
 252         mdp_irq_wait(&mdp5_kms->base, intf2vblank(lm, intf));
 253
 254         bs_set(mdp5_encoder, 0);
 255
 256         mdp5_encoder->enabled = false;
 257 }
 258
 259 static void mdp5_encoder_enable(struct drm_encoder *encoder)
 260 {
 261         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 262         struct mdp5_kms *mdp5_kms = get_kms(encoder);
 263         struct mdp5_ctl *ctl = mdp5_crtc_get_ctl(encoder->crtc);
 264         struct mdp5_interface *intf = &mdp5_encoder->intf;
 265         int intfn = mdp5_encoder->intf.num;
 266         unsigned long flags;
 267
 268         if (WARN_ON(mdp5_encoder->enabled))
 269                 return;
 270
 271         bs_set(mdp5_encoder, 1);
 272         spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 273         mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(intfn), 1);
 274         spin_unlock_irqrestore(&mdp5_encoder->intf_lock, flags);
 275         mdp5_ctl_commit(ctl, mdp_ctl_flush_mask_encoder(intf));
 276
 277         mdp5_ctl_set_encoder_state(ctl, true);
 278
 279         mdp5_encoder->enabled = true;
 280 }
 281
 282 static const struct drm_encoder_helper_funcs mdp5_encoder_helper_funcs = {
 283         .mode_fixup = mdp5_encoder_mode_fixup,
 284         .mode_set = mdp5_encoder_mode_set,
 285         .disable = mdp5_encoder_disable,
 286         .enable = mdp5_encoder_enable,
 287 };
 288
 289 int mdp5_encoder_set_split_display(struct drm_encoder *encoder,
 290                                         struct drm_encoder *slave_encoder)
 291 {
 292         struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 293         struct mdp5_kms *mdp5_kms;
 294         int intf_num;
 295         u32 data = 0;
 296
 297         if (!encoder || !slave_encoder)
 298                 return -EINVAL;
 299
 300         mdp5_kms = get_kms(encoder);
 301         intf_num = mdp5_encoder->intf.num;
 302
 303         /* Switch slave encoder's TimingGen Sync mode,
 304          * to use the master's enable signal for the slave encoder.
 305          */
 306         if (intf_num == 1)
 307                 data |= MDP5_SPLIT_DPL_LOWER_INTF2_TG_SYNC;
 308         else if (intf_num == 2)
 309                 data |= MDP5_SPLIT_DPL_LOWER_INTF1_TG_SYNC;
 310         else
 311                 return -EINVAL;
 312
 313         /* Make sure clocks are on when connectors calling this function. */
 314         mdp5_enable(mdp5_kms);
 315         mdp5_write(mdp5_kms, REG_MDP5_MDP_SPARE_0(0),
 316                 MDP5_MDP_SPARE_0_SPLIT_DPL_SINGLE_FLUSH_EN);
 317         /* Dumb Panel, Sync mode */
 318         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_UPPER, 0);
 319         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_LOWER, data);
 320         mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_EN, 1);
 321         mdp5_disable(mdp5_kms);
 322
 323         return 0;
 324 }
 325
 326 /* initialize encoder */
 327 struct drm_encoder *mdp5_encoder_init(struct drm_device *dev,
 328                                 struct mdp5_interface *intf)
 329 {
 330         struct drm_encoder *encoder = NULL;
 331         struct mdp5_encoder *mdp5_encoder;
 332         int enc_type = (intf->type == INTF_DSI) ?
 333                 DRM_MODE_ENCODER_DSI : DRM_MODE_ENCODER_TMDS;
 334         int ret;
 335
 336         mdp5_encoder = kzalloc(sizeof(*mdp5_encoder), GFP_KERNEL);
 337         if (!mdp5_encoder) {
 338                 ret = -ENOMEM;
 339                 goto fail;
 340         }
 341
 342         memcpy(&mdp5_encoder->intf, intf, sizeof(mdp5_encoder->intf));
 343         encoder = &mdp5_encoder->base;
 344
 345         spin_lock_init(&mdp5_encoder->intf_lock);
 346
 347         drm_encoder_init(dev, encoder, &mdp5_encoder_funcs, enc_type);
 348
 349         drm_encoder_helper_add(encoder, &mdp5_encoder_helper_funcs);
 350
 351         bs_init(mdp5_encoder);
 352
 353         return encoder;
 354
 355 fail:
 356         if (encoder)
 357                 mdp5_encoder_destroy(encoder);
 358
 359         return ERR_PTR(ret);
 360 }