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

   1 /*
   2  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
   3  * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15 #include <linux/export.h>
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/errno.h>
  19 #include <linux/io.h>
  20 #include <linux/err.h>
  21
  22 #include <video/imx-ipu-v3.h>
  23 #include "ipu-prv.h"
  24
  25 #define DP_SYNC 0
  26 #define DP_ASYNC0 0x60
  27 #define DP_ASYNC1 0xBC
  28
  29 #define DP_COM_CONF             0x0
  30 #define DP_GRAPH_WIND_CTRL      0x0004
  31 #define DP_FG_POS               0x0008
  32 #define DP_CSC_A_0              0x0044
  33 #define DP_CSC_A_1              0x0048
  34 #define DP_CSC_A_2              0x004C
  35 #define DP_CSC_A_3              0x0050
  36 #define DP_CSC_0                0x0054
  37 #define DP_CSC_1                0x0058
  38
  39 #define DP_COM_CONF_FG_EN               (1 << 0)
  40 #define DP_COM_CONF_GWSEL               (1 << 1)
  41 #define DP_COM_CONF_GWAM                (1 << 2)
  42 #define DP_COM_CONF_GWCKE               (1 << 3)
  43 #define DP_COM_CONF_CSC_DEF_MASK        (3 << 8)
  44 #define DP_COM_CONF_CSC_DEF_OFFSET      8
  45 #define DP_COM_CONF_CSC_DEF_FG          (3 << 8)
  46 #define DP_COM_CONF_CSC_DEF_BG          (2 << 8)
  47 #define DP_COM_CONF_CSC_DEF_BOTH        (1 << 8)
  48
  49 #define IPUV3_NUM_FLOWS         3
  50
  51 struct ipu_dp_priv;
  52
  53 struct ipu_dp {
  54         u32 flow;
  55         bool in_use;
  56         bool foreground;
  57         enum ipu_color_space in_cs;
  58 };
  59
  60 struct ipu_flow {
  61         struct ipu_dp foreground;
  62         struct ipu_dp background;
  63         enum ipu_color_space out_cs;
  64         void __iomem *base;
  65         struct ipu_dp_priv *priv;
  66 };
  67
  68 struct ipu_dp_priv {
  69         struct ipu_soc *ipu;
  70         struct device *dev;
  71         void __iomem *base;
  72         struct ipu_flow flow[IPUV3_NUM_FLOWS];
  73         struct mutex mutex;
  74         int use_count;
  75 };
  76
  77 static u32 ipu_dp_flow_base[] = {DP_SYNC, DP_ASYNC0, DP_ASYNC1};
  78
  79 static inline struct ipu_flow *to_flow(struct ipu_dp *dp)
  80 {
  81         if (dp->foreground)
  82                 return container_of(dp, struct ipu_flow, foreground);
  83         else
  84                 return container_of(dp, struct ipu_flow, background);
  85 }
  86
  87 int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable,
  88                 u8 alpha, bool bg_chan)
  89 {
  90         struct ipu_flow *flow = to_flow(dp);
  91         struct ipu_dp_priv *priv = flow->priv;
  92         u32 reg;
  93
  94         mutex_lock(&priv->mutex);
  95
  96         reg = readl(flow->base + DP_COM_CONF);
  97         if (bg_chan)
  98                 reg &= ~DP_COM_CONF_GWSEL;
  99         else
 100                 reg |= DP_COM_CONF_GWSEL;
 101         writel(reg, flow->base + DP_COM_CONF);
 102
 103         if (enable) {
 104                 reg = readl(flow->base + DP_GRAPH_WIND_CTRL) & 0x00FFFFFFL;
 105                 writel(reg | ((u32) alpha << 24),
 106                              flow->base + DP_GRAPH_WIND_CTRL);
 107
 108                 reg = readl(flow->base + DP_COM_CONF);
 109                 writel(reg | DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
 110         } else {
 111                 reg = readl(flow->base + DP_COM_CONF);
 112                 writel(reg & ~DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
 113         }
 114
 115         ipu_srm_dp_sync_update(priv->ipu);
 116
 117         mutex_unlock(&priv->mutex);
 118
 119         return 0;
 120 }
 121 EXPORT_SYMBOL_GPL(ipu_dp_set_global_alpha);
 122
 123 int ipu_dp_set_window_pos(struct ipu_dp *dp, u16 x_pos, u16 y_pos)
 124 {
 125         struct ipu_flow *flow = to_flow(dp);
 126         struct ipu_dp_priv *priv = flow->priv;
 127
 128         writel((x_pos << 16) | y_pos, flow->base + DP_FG_POS);
 129
 130         ipu_srm_dp_sync_update(priv->ipu);
 131
 132         return 0;
 133 }
 134 EXPORT_SYMBOL_GPL(ipu_dp_set_window_pos);
 135
 136 static void ipu_dp_csc_init(struct ipu_flow *flow,
 137                 enum ipu_color_space in,
 138                 enum ipu_color_space out,
 139                 u32 place)
 140 {
 141         u32 reg;
 142
 143         reg = readl(flow->base + DP_COM_CONF);
 144         reg &= ~DP_COM_CONF_CSC_DEF_MASK;
 145
 146         if (in == out) {
 147                 writel(reg, flow->base + DP_COM_CONF);
 148                 return;
 149         }
 150
 151         if (in == IPUV3_COLORSPACE_RGB && out == IPUV3_COLORSPACE_YUV) {
 152                 writel(0x099 | (0x12d << 16), flow->base + DP_CSC_A_0);
 153                 writel(0x03a | (0x3a9 << 16), flow->base + DP_CSC_A_1);
 154                 writel(0x356 | (0x100 << 16), flow->base + DP_CSC_A_2);
 155                 writel(0x100 | (0x329 << 16), flow->base + DP_CSC_A_3);
 156                 writel(0x3d6 | (0x0000 << 16) | (2 << 30),
 157                                 flow->base + DP_CSC_0);
 158                 writel(0x200 | (2 << 14) | (0x200 << 16) | (2 << 30),
 159                                 flow->base + DP_CSC_1);
 160         } else {
 161                 writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0);
 162                 writel(0x0cc | (0x095 << 16), flow->base + DP_CSC_A_1);
 163                 writel(0x3ce | (0x398 << 16), flow->base + DP_CSC_A_2);
 164                 writel(0x095 | (0x0ff << 16), flow->base + DP_CSC_A_3);
 165                 writel(0x000 | (0x3e42 << 16) | (1 << 30),
 166                                 flow->base + DP_CSC_0);
 167                 writel(0x10a | (1 << 14) | (0x3dd6 << 16) | (1 << 30),
 168                                 flow->base + DP_CSC_1);
 169         }
 170
 171         reg |= place;
 172
 173         writel(reg, flow->base + DP_COM_CONF);
 174 }
 175
 176 int ipu_dp_setup_channel(struct ipu_dp *dp,
 177                 enum ipu_color_space in,
 178                 enum ipu_color_space out)
 179 {
 180         struct ipu_flow *flow = to_flow(dp);
 181         struct ipu_dp_priv *priv = flow->priv;
 182
 183         mutex_lock(&priv->mutex);
 184
 185         dp->in_cs = in;
 186
 187         if (!dp->foreground)
 188                 flow->out_cs = out;
 189
 190         if (flow->foreground.in_cs == flow->background.in_cs) {
 191                 /*
 192                  * foreground and background are of same colorspace, put
 193                  * colorspace converter after combining unit.
 194                  */
 195                 ipu_dp_csc_init(flow, flow->foreground.in_cs, flow->out_cs,
 196                                 DP_COM_CONF_CSC_DEF_BOTH);
 197         } else {
 198                 if (flow->foreground.in_cs == flow->out_cs)
 199                         /*
 200                          * foreground identical to output, apply color
 201                          * conversion on background
 202                          */
 203                         ipu_dp_csc_init(flow, flow->background.in_cs,
 204                                         flow->out_cs, DP_COM_CONF_CSC_DEF_BG);
 205                 else
 206                         ipu_dp_csc_init(flow, flow->foreground.in_cs,
 207                                         flow->out_cs, DP_COM_CONF_CSC_DEF_FG);
 208         }
 209
 210         ipu_srm_dp_sync_update(priv->ipu);
 211
 212         mutex_unlock(&priv->mutex);
 213
 214         return 0;
 215 }
 216 EXPORT_SYMBOL_GPL(ipu_dp_setup_channel);
 217
 218 int ipu_dp_enable(struct ipu_soc *ipu)
 219 {
 220         struct ipu_dp_priv *priv = ipu->dp_priv;
 221
 222         mutex_lock(&priv->mutex);
 223
 224         if (!priv->use_count)
 225                 ipu_module_enable(priv->ipu, IPU_CONF_DP_EN);
 226
 227         priv->use_count++;
 228
 229         mutex_unlock(&priv->mutex);
 230
 231         return 0;
 232 }
 233 EXPORT_SYMBOL_GPL(ipu_dp_enable);
 234
 235 int ipu_dp_enable_channel(struct ipu_dp *dp)
 236 {
 237         struct ipu_flow *flow = to_flow(dp);
 238         struct ipu_dp_priv *priv = flow->priv;
 239         u32 reg;
 240
 241         if (!dp->foreground)
 242                 return 0;
 243
 244         mutex_lock(&priv->mutex);
 245
 246         reg = readl(flow->base + DP_COM_CONF);
 247         reg |= DP_COM_CONF_FG_EN;
 248         writel(reg, flow->base + DP_COM_CONF);
 249
 250         ipu_srm_dp_sync_update(priv->ipu);
 251
 252         mutex_unlock(&priv->mutex);
 253
 254         return 0;
 255 }
 256 EXPORT_SYMBOL_GPL(ipu_dp_enable_channel);
 257
 258 void ipu_dp_disable_channel(struct ipu_dp *dp)
 259 {
 260         struct ipu_flow *flow = to_flow(dp);
 261         struct ipu_dp_priv *priv = flow->priv;
 262         u32 reg, csc;
 263
 264         if (!dp->foreground)
 265                 return;
 266
 267         mutex_lock(&priv->mutex);
 268
 269         reg = readl(flow->base + DP_COM_CONF);
 270         csc = reg & DP_COM_CONF_CSC_DEF_MASK;
 271         if (csc == DP_COM_CONF_CSC_DEF_FG)
 272                 reg &= ~DP_COM_CONF_CSC_DEF_MASK;
 273
 274         reg &= ~DP_COM_CONF_FG_EN;
 275         writel(reg, flow->base + DP_COM_CONF);
 276
 277         writel(0, flow->base + DP_FG_POS);
 278         ipu_srm_dp_sync_update(priv->ipu);
 279
 280         if (ipu_idmac_channel_busy(priv->ipu, IPUV3_CHANNEL_MEM_BG_SYNC))
 281                 ipu_wait_interrupt(priv->ipu, IPU_IRQ_DP_SF_END, 50);
 282
 283         mutex_unlock(&priv->mutex);
 284 }
 285 EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);
 286
 287 void ipu_dp_disable(struct ipu_soc *ipu)
 288 {
 289         struct ipu_dp_priv *priv = ipu->dp_priv;
 290
 291         mutex_lock(&priv->mutex);
 292
 293         priv->use_count--;
 294
 295         if (!priv->use_count)
 296                 ipu_module_disable(priv->ipu, IPU_CONF_DP_EN);
 297
 298         if (priv->use_count < 0)
 299                 priv->use_count = 0;
 300
 301         mutex_unlock(&priv->mutex);
 302 }
 303 EXPORT_SYMBOL_GPL(ipu_dp_disable);
 304
 305 struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow)
 306 {
 307         struct ipu_dp_priv *priv = ipu->dp_priv;
 308         struct ipu_dp *dp;
 309
 310         if ((flow >> 1) >= IPUV3_NUM_FLOWS)
 311                 return ERR_PTR(-EINVAL);
 312
 313         if (flow & 1)
 314                 dp = &priv->flow[flow >> 1].foreground;
 315         else
 316                 dp = &priv->flow[flow >> 1].background;
 317
 318         if (dp->in_use)
 319                 return ERR_PTR(-EBUSY);
 320
 321         dp->in_use = true;
 322
 323         return dp;
 324 }
 325 EXPORT_SYMBOL_GPL(ipu_dp_get);
 326
 327 void ipu_dp_put(struct ipu_dp *dp)
 328 {
 329         dp->in_use = false;
 330 }
 331 EXPORT_SYMBOL_GPL(ipu_dp_put);
 332
 333 int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
 334 {
 335         struct ipu_dp_priv *priv;
 336         int i;
 337
 338         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 339         if (!priv)
 340                 return -ENOMEM;
 341         priv->dev = dev;
 342         priv->ipu = ipu;
 343
 344         ipu->dp_priv = priv;
 345
 346         priv->base = devm_ioremap(dev, base, PAGE_SIZE);
 347         if (!priv->base)
 348                 return -ENOMEM;
 349
 350         mutex_init(&priv->mutex);
 351
 352         for (i = 0; i < IPUV3_NUM_FLOWS; i++) {
 353                 priv->flow[i].foreground.foreground = true;
 354                 priv->flow[i].base = priv->base + ipu_dp_flow_base[i];
 355                 priv->flow[i].priv = priv;
 356         }
 357
 358         return 0;
 359 }
 360
 361 void ipu_dp_exit(struct ipu_soc *ipu)
 362 {
 363 }