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_update(priv->ipu, true);
 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_update(priv->ipu, true);
 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 == IPUV3_COLORSPACE_UNKNOWN ||
 199                     flow->foreground.in_cs == flow->out_cs)
 200                         /*
 201                          * foreground identical to output, apply color
 202                          * conversion on background
 203                          */
 204                         ipu_dp_csc_init(flow, flow->background.in_cs,
 205                                         flow->out_cs, DP_COM_CONF_CSC_DEF_BG);
 206                 else
 207                         ipu_dp_csc_init(flow, flow->foreground.in_cs,
 208                                         flow->out_cs, DP_COM_CONF_CSC_DEF_FG);
 209         }
 210
 211         ipu_srm_dp_update(priv->ipu, true);
 212
 213         mutex_unlock(&priv->mutex);
 214
 215         return 0;
 216 }
 217 EXPORT_SYMBOL_GPL(ipu_dp_setup_channel);
 218
 219 int ipu_dp_enable(struct ipu_soc *ipu)
 220 {
 221         struct ipu_dp_priv *priv = ipu->dp_priv;
 222
 223         mutex_lock(&priv->mutex);
 224
 225         if (!priv->use_count)
 226                 ipu_module_enable(priv->ipu, IPU_CONF_DP_EN);
 227
 228         priv->use_count++;
 229
 230         mutex_unlock(&priv->mutex);
 231
 232         return 0;
 233 }
 234 EXPORT_SYMBOL_GPL(ipu_dp_enable);
 235
 236 int ipu_dp_enable_channel(struct ipu_dp *dp)
 237 {
 238         struct ipu_flow *flow = to_flow(dp);
 239         struct ipu_dp_priv *priv = flow->priv;
 240         u32 reg;
 241
 242         if (!dp->foreground)
 243                 return 0;
 244
 245         mutex_lock(&priv->mutex);
 246
 247         reg = readl(flow->base + DP_COM_CONF);
 248         reg |= DP_COM_CONF_FG_EN;
 249         writel(reg, flow->base + DP_COM_CONF);
 250
 251         ipu_srm_dp_update(priv->ipu, true);
 252
 253         mutex_unlock(&priv->mutex);
 254
 255         return 0;
 256 }
 257 EXPORT_SYMBOL_GPL(ipu_dp_enable_channel);
 258
 259 void ipu_dp_disable_channel(struct ipu_dp *dp, bool sync)
 260 {
 261         struct ipu_flow *flow = to_flow(dp);
 262         struct ipu_dp_priv *priv = flow->priv;
 263         u32 reg, csc;
 264
 265         dp->in_cs = IPUV3_COLORSPACE_UNKNOWN;
 266
 267         if (!dp->foreground)
 268                 return;
 269
 270         mutex_lock(&priv->mutex);
 271
 272         reg = readl(flow->base + DP_COM_CONF);
 273         csc = reg & DP_COM_CONF_CSC_DEF_MASK;
 274         reg &= ~DP_COM_CONF_CSC_DEF_MASK;
 275         if (csc == DP_COM_CONF_CSC_DEF_BOTH || csc == DP_COM_CONF_CSC_DEF_BG)
 276                 reg |= DP_COM_CONF_CSC_DEF_BG;
 277
 278         reg &= ~DP_COM_CONF_FG_EN;
 279         writel(reg, flow->base + DP_COM_CONF);
 280
 281         writel(0, flow->base + DP_FG_POS);
 282         ipu_srm_dp_update(priv->ipu, sync);
 283
 284         mutex_unlock(&priv->mutex);
 285 }
 286 EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);
 287
 288 void ipu_dp_disable(struct ipu_soc *ipu)
 289 {
 290         struct ipu_dp_priv *priv = ipu->dp_priv;
 291
 292         mutex_lock(&priv->mutex);
 293
 294         priv->use_count--;
 295
 296         if (!priv->use_count)
 297                 ipu_module_disable(priv->ipu, IPU_CONF_DP_EN);
 298
 299         if (priv->use_count < 0)
 300                 priv->use_count = 0;
 301
 302         mutex_unlock(&priv->mutex);
 303 }
 304 EXPORT_SYMBOL_GPL(ipu_dp_disable);
 305
 306 struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow)
 307 {
 308         struct ipu_dp_priv *priv = ipu->dp_priv;
 309         struct ipu_dp *dp;
 310
 311         if ((flow >> 1) >= IPUV3_NUM_FLOWS)
 312                 return ERR_PTR(-EINVAL);
 313
 314         if (flow & 1)
 315                 dp = &priv->flow[flow >> 1].foreground;
 316         else
 317                 dp = &priv->flow[flow >> 1].background;
 318
 319         if (dp->in_use)
 320                 return ERR_PTR(-EBUSY);
 321
 322         dp->in_use = true;
 323
 324         return dp;
 325 }
 326 EXPORT_SYMBOL_GPL(ipu_dp_get);
 327
 328 void ipu_dp_put(struct ipu_dp *dp)
 329 {
 330         dp->in_use = false;
 331 }
 332 EXPORT_SYMBOL_GPL(ipu_dp_put);
 333
 334 int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
 335 {
 336         struct ipu_dp_priv *priv;
 337         int i;
 338
 339         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 340         if (!priv)
 341                 return -ENOMEM;
 342         priv->dev = dev;
 343         priv->ipu = ipu;
 344
 345         ipu->dp_priv = priv;
 346
 347         priv->base = devm_ioremap(dev, base, PAGE_SIZE);
 348         if (!priv->base)
 349                 return -ENOMEM;
 350
 351         mutex_init(&priv->mutex);
 352
 353         for (i = 0; i < IPUV3_NUM_FLOWS; i++) {
 354                 priv->flow[i].background.in_cs = IPUV3_COLORSPACE_UNKNOWN;
 355                 priv->flow[i].foreground.in_cs = IPUV3_COLORSPACE_UNKNOWN;
 356                 priv->flow[i].foreground.foreground = true;
 357                 priv->flow[i].base = priv->base + ipu_dp_flow_base[i];
 358                 priv->flow[i].priv = priv;
 359         }
 360
 361         return 0;
 362 }
 363
 364 void ipu_dp_exit(struct ipu_soc *ipu)
 365 {
 366 }