drivers/gpu/ipu-v3/ipu-dc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
   4  * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
   5  */
   6
   7 #include <linux/export.h>
   8 #include <linux/module.h>
   9 #include <linux/types.h>
  10 #include <linux/errno.h>
  11 #include <linux/delay.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/io.h>
  14
  15 #include <video/imx-ipu-v3.h>
  16 #include "ipu-prv.h"
  17
  18 #define DC_MAP_CONF_PTR(n)      (0x108 + ((n) & ~0x1) * 2)
  19 #define DC_MAP_CONF_VAL(n)      (0x144 + ((n) & ~0x1) * 2)
  20
  21 #define DC_EVT_NF               0
  22 #define DC_EVT_NL               1
  23 #define DC_EVT_EOF              2
  24 #define DC_EVT_NFIELD           3
  25 #define DC_EVT_EOL              4
  26 #define DC_EVT_EOFIELD          5
  27 #define DC_EVT_NEW_ADDR         6
  28 #define DC_EVT_NEW_CHAN         7
  29 #define DC_EVT_NEW_DATA         8
  30
  31 #define DC_EVT_NEW_ADDR_W_0     0
  32 #define DC_EVT_NEW_ADDR_W_1     1
  33 #define DC_EVT_NEW_CHAN_W_0     2
  34 #define DC_EVT_NEW_CHAN_W_1     3
  35 #define DC_EVT_NEW_DATA_W_0     4
  36 #define DC_EVT_NEW_DATA_W_1     5
  37 #define DC_EVT_NEW_ADDR_R_0     6
  38 #define DC_EVT_NEW_ADDR_R_1     7
  39 #define DC_EVT_NEW_CHAN_R_0     8
  40 #define DC_EVT_NEW_CHAN_R_1     9
  41 #define DC_EVT_NEW_DATA_R_0     10
  42 #define DC_EVT_NEW_DATA_R_1     11
  43
  44 #define DC_WR_CH_CONF           0x0
  45 #define DC_WR_CH_ADDR           0x4
  46 #define DC_RL_CH(evt)           (8 + ((evt) & ~0x1) * 2)
  47
  48 #define DC_GEN                  0xd4
  49 #define DC_DISP_CONF1(disp)     (0xd8 + (disp) * 4)
  50 #define DC_DISP_CONF2(disp)     (0xe8 + (disp) * 4)
  51 #define DC_STAT                 0x1c8
  52
  53 #define WROD(lf)                (0x18 | ((lf) << 1))
  54 #define WRG                     0x01
  55 #define WCLK                    0xc9
  56
  57 #define SYNC_WAVE 0
  58 #define NULL_WAVE (-1)
  59
  60 #define DC_GEN_SYNC_1_6_SYNC    (2 << 1)
  61 #define DC_GEN_SYNC_PRIORITY_1  (1 << 7)
  62
  63 #define DC_WR_CH_CONF_WORD_SIZE_8               (0 << 0)
  64 #define DC_WR_CH_CONF_WORD_SIZE_16              (1 << 0)
  65 #define DC_WR_CH_CONF_WORD_SIZE_24              (2 << 0)
  66 #define DC_WR_CH_CONF_WORD_SIZE_32              (3 << 0)
  67 #define DC_WR_CH_CONF_DISP_ID_PARALLEL(i)       (((i) & 0x1) << 3)
  68 #define DC_WR_CH_CONF_DISP_ID_SERIAL            (2 << 3)
  69 #define DC_WR_CH_CONF_DISP_ID_ASYNC             (3 << 4)
  70 #define DC_WR_CH_CONF_FIELD_MODE                (1 << 9)
  71 #define DC_WR_CH_CONF_PROG_TYPE_NORMAL          (4 << 5)
  72 #define DC_WR_CH_CONF_PROG_TYPE_MASK            (7 << 5)
  73 #define DC_WR_CH_CONF_PROG_DI_ID                (1 << 2)
  74 #define DC_WR_CH_CONF_PROG_DISP_ID(i)           (((i) & 0x1) << 3)
  75
  76 #define IPU_DC_NUM_CHANNELS     10
  77
  78 struct ipu_dc_priv;
  79
  80 enum ipu_dc_map {
  81         IPU_DC_MAP_RGB24,
  82         IPU_DC_MAP_RGB565,
  83         IPU_DC_MAP_GBR24, /* TVEv2 */
  84         IPU_DC_MAP_BGR666,
  85         IPU_DC_MAP_LVDS666,
  86         IPU_DC_MAP_BGR24,
  87 };
  88
  89 struct ipu_dc {
  90         /* The display interface number assigned to this dc channel */
  91         unsigned int            di;
  92         void __iomem            *base;
  93         struct ipu_dc_priv      *priv;
  94         int                     chno;
  95         bool                    in_use;
  96 };
  97
  98 struct ipu_dc_priv {
  99         void __iomem            *dc_reg;
 100         void __iomem            *dc_tmpl_reg;
 101         struct ipu_soc          *ipu;
 102         struct device           *dev;
 103         struct ipu_dc           channels[IPU_DC_NUM_CHANNELS];
 104         struct mutex            mutex;
 105         struct completion       comp;
 106         int                     use_count;
 107 };
 108
 109 static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
 110 {
 111         u32 reg;
 112
 113         reg = readl(dc->base + DC_RL_CH(event));
 114         reg &= ~(0xffff << (16 * (event & 0x1)));
 115         reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
 116         writel(reg, dc->base + DC_RL_CH(event));
 117 }
 118
 119 static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
 120                 int map, int wave, int glue, int sync, int stop)
 121 {
 122         struct ipu_dc_priv *priv = dc->priv;
 123         u32 reg1, reg2;
 124
 125         if (opcode == WCLK) {
 126                 reg1 = (operand << 20) & 0xfff00000;
 127                 reg2 = operand >> 12 | opcode << 1 | stop << 9;
 128         } else if (opcode == WRG) {
 129                 reg1 = sync | glue << 4 | ++wave << 11 | ((operand << 15) & 0xffff8000);
 130                 reg2 = operand >> 17 | opcode << 7 | stop << 9;
 131         } else {
 132                 reg1 = sync | glue << 4 | ++wave << 11 | ++map << 15 | ((operand << 20) & 0xfff00000);
 133                 reg2 = operand >> 12 | opcode << 4 | stop << 9;
 134         }
 135         writel(reg1, priv->dc_tmpl_reg + word * 8);
 136         writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
 137 }
 138
 139 static int ipu_bus_format_to_map(u32 fmt)
 140 {
 141         switch (fmt) {
 142         default:
 143                 WARN_ON(1);
 144                 fallthrough;
 145         case MEDIA_BUS_FMT_RGB888_1X24:
 146                 return IPU_DC_MAP_RGB24;
 147         case MEDIA_BUS_FMT_RGB565_1X16:
 148                 return IPU_DC_MAP_RGB565;
 149         case MEDIA_BUS_FMT_GBR888_1X24:
 150                 return IPU_DC_MAP_GBR24;
 151         case MEDIA_BUS_FMT_RGB666_1X18:
 152                 return IPU_DC_MAP_BGR666;
 153         case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
 154                 return IPU_DC_MAP_LVDS666;
 155         case MEDIA_BUS_FMT_BGR888_1X24:
 156                 return IPU_DC_MAP_BGR24;
 157         }
 158 }
 159
 160 int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced,
 161                 u32 bus_format, u32 width)
 162 {
 163         struct ipu_dc_priv *priv = dc->priv;
 164         int addr, sync;
 165         u32 reg = 0;
 166         int map;
 167
 168         dc->di = ipu_di_get_num(di);
 169
 170         map = ipu_bus_format_to_map(bus_format);
 171
 172         /*
 173          * In interlaced mode we need more counters to create the asymmetric
 174          * per-field VSYNC signals. The pixel active signal synchronising DC
 175          * to DI moves to signal generator #6 (see ipu-di.c). In progressive
 176          * mode counter #5 is used.
 177          */
 178         sync = interlaced ? 6 : 5;
 179
 180         /* Reserve 5 microcode template words for each DI */
 181         if (dc->di)
 182                 addr = 5;
 183         else
 184                 addr = 0;
 185
 186         if (interlaced) {
 187                 dc_link_event(dc, DC_EVT_NL, addr, 3);
 188                 dc_link_event(dc, DC_EVT_EOL, addr, 2);
 189                 dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1);
 190
 191                 /* Init template microcode */
 192                 dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
 193         } else {
 194                 dc_link_event(dc, DC_EVT_NL, addr + 2, 3);
 195                 dc_link_event(dc, DC_EVT_EOL, addr + 3, 2);
 196                 dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1);
 197
 198                 /* Init template microcode */
 199                 dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1);
 200                 dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0);
 201                 dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
 202                 dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
 203         }
 204
 205         dc_link_event(dc, DC_EVT_NF, 0, 0);
 206         dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
 207         dc_link_event(dc, DC_EVT_EOF, 0, 0);
 208         dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
 209         dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
 210         dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);
 211
 212         reg = readl(dc->base + DC_WR_CH_CONF);
 213         if (interlaced)
 214                 reg |= DC_WR_CH_CONF_FIELD_MODE;
 215         else
 216                 reg &= ~DC_WR_CH_CONF_FIELD_MODE;
 217         writel(reg, dc->base + DC_WR_CH_CONF);
 218
 219         writel(0x0, dc->base + DC_WR_CH_ADDR);
 220         writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));
 221
 222         return 0;
 223 }
 224 EXPORT_SYMBOL_GPL(ipu_dc_init_sync);
 225
 226 void ipu_dc_enable(struct ipu_soc *ipu)
 227 {
 228         struct ipu_dc_priv *priv = ipu->dc_priv;
 229
 230         mutex_lock(&priv->mutex);
 231
 232         if (!priv->use_count)
 233                 ipu_module_enable(priv->ipu, IPU_CONF_DC_EN);
 234
 235         priv->use_count++;
 236
 237         mutex_unlock(&priv->mutex);
 238 }
 239 EXPORT_SYMBOL_GPL(ipu_dc_enable);
 240
 241 void ipu_dc_enable_channel(struct ipu_dc *dc)
 242 {
 243         u32 reg;
 244
 245         reg = readl(dc->base + DC_WR_CH_CONF);
 246         reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
 247         writel(reg, dc->base + DC_WR_CH_CONF);
 248 }
 249 EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);
 250
 251 void ipu_dc_disable_channel(struct ipu_dc *dc)
 252 {
 253         u32 val;
 254
 255         val = readl(dc->base + DC_WR_CH_CONF);
 256         val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
 257         writel(val, dc->base + DC_WR_CH_CONF);
 258 }
 259 EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);
 260
 261 void ipu_dc_disable(struct ipu_soc *ipu)
 262 {
 263         struct ipu_dc_priv *priv = ipu->dc_priv;
 264
 265         mutex_lock(&priv->mutex);
 266
 267         priv->use_count--;
 268         if (!priv->use_count)
 269                 ipu_module_disable(priv->ipu, IPU_CONF_DC_EN);
 270
 271         if (priv->use_count < 0)
 272                 priv->use_count = 0;
 273
 274         mutex_unlock(&priv->mutex);
 275 }
 276 EXPORT_SYMBOL_GPL(ipu_dc_disable);
 277
 278 static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
 279                 int byte_num, int offset, int mask)
 280 {
 281         int ptr = map * 3 + byte_num;
 282         u32 reg;
 283
 284         reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
 285         reg &= ~(0xffff << (16 * (ptr & 0x1)));
 286         reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
 287         writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));
 288
 289         reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
 290         reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
 291         reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
 292         writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
 293 }
 294
 295 static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
 296 {
 297         u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
 298
 299         writel(reg & ~(0xffff << (16 * (map & 0x1))),
 300                      priv->dc_reg + DC_MAP_CONF_PTR(map));
 301 }
 302
 303 struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel)
 304 {
 305         struct ipu_dc_priv *priv = ipu->dc_priv;
 306         struct ipu_dc *dc;
 307
 308         if (channel >= IPU_DC_NUM_CHANNELS)
 309                 return ERR_PTR(-ENODEV);
 310
 311         dc = &priv->channels[channel];
 312
 313         mutex_lock(&priv->mutex);
 314
 315         if (dc->in_use) {
 316                 mutex_unlock(&priv->mutex);
 317                 return ERR_PTR(-EBUSY);
 318         }
 319
 320         dc->in_use = true;
 321
 322         mutex_unlock(&priv->mutex);
 323
 324         return dc;
 325 }
 326 EXPORT_SYMBOL_GPL(ipu_dc_get);
 327
 328 void ipu_dc_put(struct ipu_dc *dc)
 329 {
 330         struct ipu_dc_priv *priv = dc->priv;
 331
 332         mutex_lock(&priv->mutex);
 333         dc->in_use = false;
 334         mutex_unlock(&priv->mutex);
 335 }
 336 EXPORT_SYMBOL_GPL(ipu_dc_put);
 337
 338 int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
 339                 unsigned long base, unsigned long template_base)
 340 {
 341         struct ipu_dc_priv *priv;
 342         static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
 343                 0x78, 0, 0x94, 0xb4};
 344         int i;
 345
 346         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 347         if (!priv)
 348                 return -ENOMEM;
 349
 350         mutex_init(&priv->mutex);
 351
 352         priv->dev = dev;
 353         priv->ipu = ipu;
 354         priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
 355         priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
 356         if (!priv->dc_reg || !priv->dc_tmpl_reg)
 357                 return -ENOMEM;
 358
 359         for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
 360                 priv->channels[i].chno = i;
 361                 priv->channels[i].priv = priv;
 362                 priv->channels[i].base = priv->dc_reg + channel_offsets[i];
 363         }
 364
 365         writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
 366                         DC_WR_CH_CONF_PROG_DI_ID,
 367                         priv->channels[1].base + DC_WR_CH_CONF);
 368         writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
 369                         priv->channels[5].base + DC_WR_CH_CONF);
 370
 371         writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1,
 372                 priv->dc_reg + DC_GEN);
 373
 374         ipu->dc_priv = priv;
 375
 376         dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
 377                         base, template_base);
 378
 379         /* rgb24 */
 380         ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
 381         ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
 382         ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
 383         ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */
 384
 385         /* rgb565 */
 386         ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
 387         ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
 388         ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
 389         ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */
 390
 391         /* gbr24 */
 392         ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
 393         ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
 394         ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
 395         ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */
 396
 397         /* bgr666 */
 398         ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
 399         ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
 400         ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
 401         ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */
 402
 403         /* lvds666 */
 404         ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666);
 405         ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */
 406         ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */
 407         ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */
 408
 409         /* bgr24 */
 410         ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
 411         ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
 412         ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
 413         ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */
 414
 415         return 0;
 416 }
 417
 418 void ipu_dc_exit(struct ipu_soc *ipu)
 419 {
 420 }