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 == 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_update(priv->ipu, true); 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_update(priv->ipu, true); 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, bool sync) 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_update(priv->ipu, sync); 279 280 mutex_unlock(&priv->mutex); 281 } 282 EXPORT_SYMBOL_GPL(ipu_dp_disable_channel); 283 284 void ipu_dp_disable(struct ipu_soc *ipu) 285 { 286 struct ipu_dp_priv *priv = ipu->dp_priv; 287 288 mutex_lock(&priv->mutex); 289 290 priv->use_count--; 291 292 if (!priv->use_count) 293 ipu_module_disable(priv->ipu, IPU_CONF_DP_EN); 294 295 if (priv->use_count < 0) 296 priv->use_count = 0; 297 298 mutex_unlock(&priv->mutex); 299 } 300 EXPORT_SYMBOL_GPL(ipu_dp_disable); 301 302 struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow) 303 { 304 struct ipu_dp_priv *priv = ipu->dp_priv; 305 struct ipu_dp *dp; 306 307 if ((flow >> 1) >= IPUV3_NUM_FLOWS) 308 return ERR_PTR(-EINVAL); 309 310 if (flow & 1) 311 dp = &priv->flow[flow >> 1].foreground; 312 else 313 dp = &priv->flow[flow >> 1].background; 314 315 if (dp->in_use) 316 return ERR_PTR(-EBUSY); 317 318 dp->in_use = true; 319 320 return dp; 321 } 322 EXPORT_SYMBOL_GPL(ipu_dp_get); 323 324 void ipu_dp_put(struct ipu_dp *dp) 325 { 326 dp->in_use = false; 327 } 328 EXPORT_SYMBOL_GPL(ipu_dp_put); 329 330 int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base) 331 { 332 struct ipu_dp_priv *priv; 333 int i; 334 335 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 336 if (!priv) 337 return -ENOMEM; 338 priv->dev = dev; 339 priv->ipu = ipu; 340 341 ipu->dp_priv = priv; 342 343 priv->base = devm_ioremap(dev, base, PAGE_SIZE); 344 if (!priv->base) 345 return -ENOMEM; 346 347 mutex_init(&priv->mutex); 348 349 for (i = 0; i < IPUV3_NUM_FLOWS; i++) { 350 priv->flow[i].foreground.foreground = true; 351 priv->flow[i].base = priv->base + ipu_dp_flow_base[i]; 352 priv->flow[i].priv = priv; 353 } 354 355 return 0; 356 } 357 358 void ipu_dp_exit(struct ipu_soc *ipu) 359 { 360 } 361