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 #include <linux/export.h> 7 #include <linux/kernel.h> 8 #include <linux/types.h> 9 #include <linux/errno.h> 10 #include <linux/io.h> 11 #include <linux/err.h> 12 13 #include <drm/drm_color_mgmt.h> 14 #include <video/imx-ipu-v3.h> 15 #include "ipu-prv.h" 16 17 #define DP_SYNC 0 18 #define DP_ASYNC0 0x60 19 #define DP_ASYNC1 0xBC 20 21 #define DP_COM_CONF 0x0 22 #define DP_GRAPH_WIND_CTRL 0x0004 23 #define DP_FG_POS 0x0008 24 #define DP_CSC_A_0 0x0044 25 #define DP_CSC_A_1 0x0048 26 #define DP_CSC_A_2 0x004C 27 #define DP_CSC_A_3 0x0050 28 #define DP_CSC_0 0x0054 29 #define DP_CSC_1 0x0058 30 31 #define DP_COM_CONF_FG_EN (1 << 0) 32 #define DP_COM_CONF_GWSEL (1 << 1) 33 #define DP_COM_CONF_GWAM (1 << 2) 34 #define DP_COM_CONF_GWCKE (1 << 3) 35 #define DP_COM_CONF_CSC_DEF_MASK (3 << 8) 36 #define DP_COM_CONF_CSC_DEF_OFFSET 8 37 #define DP_COM_CONF_CSC_DEF_FG (3 << 8) 38 #define DP_COM_CONF_CSC_DEF_BG (2 << 8) 39 #define DP_COM_CONF_CSC_DEF_BOTH (1 << 8) 40 41 #define IPUV3_NUM_FLOWS 3 42 43 struct ipu_dp_priv; 44 45 struct ipu_dp { 46 u32 flow; 47 bool in_use; 48 bool foreground; 49 enum ipu_color_space in_cs; 50 }; 51 52 struct ipu_flow { 53 struct ipu_dp foreground; 54 struct ipu_dp background; 55 enum ipu_color_space out_cs; 56 void __iomem *base; 57 struct ipu_dp_priv *priv; 58 }; 59 60 struct ipu_dp_priv { 61 struct ipu_soc *ipu; 62 struct device *dev; 63 void __iomem *base; 64 struct ipu_flow flow[IPUV3_NUM_FLOWS]; 65 struct mutex mutex; 66 int use_count; 67 }; 68 69 static u32 ipu_dp_flow_base[] = {DP_SYNC, DP_ASYNC0, DP_ASYNC1}; 70 71 static inline struct ipu_flow *to_flow(struct ipu_dp *dp) 72 { 73 if (dp->foreground) 74 return container_of(dp, struct ipu_flow, foreground); 75 else 76 return container_of(dp, struct ipu_flow, background); 77 } 78 79 int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable, 80 u8 alpha, bool bg_chan) 81 { 82 struct ipu_flow *flow = to_flow(dp); 83 struct ipu_dp_priv *priv = flow->priv; 84 u32 reg; 85 86 mutex_lock(&priv->mutex); 87 88 reg = readl(flow->base + DP_COM_CONF); 89 if (bg_chan) 90 reg &= ~DP_COM_CONF_GWSEL; 91 else 92 reg |= DP_COM_CONF_GWSEL; 93 writel(reg, flow->base + DP_COM_CONF); 94 95 if (enable) { 96 reg = readl(flow->base + DP_GRAPH_WIND_CTRL) & 0x00FFFFFFL; 97 writel(reg | ((u32) alpha << 24), 98 flow->base + DP_GRAPH_WIND_CTRL); 99 100 reg = readl(flow->base + DP_COM_CONF); 101 writel(reg | DP_COM_CONF_GWAM, flow->base + DP_COM_CONF); 102 } else { 103 reg = readl(flow->base + DP_COM_CONF); 104 writel(reg & ~DP_COM_CONF_GWAM, flow->base + DP_COM_CONF); 105 } 106 107 ipu_srm_dp_update(priv->ipu, true); 108 109 mutex_unlock(&priv->mutex); 110 111 return 0; 112 } 113 EXPORT_SYMBOL_GPL(ipu_dp_set_global_alpha); 114 115 int ipu_dp_set_window_pos(struct ipu_dp *dp, u16 x_pos, u16 y_pos) 116 { 117 struct ipu_flow *flow = to_flow(dp); 118 struct ipu_dp_priv *priv = flow->priv; 119 120 writel((x_pos << 16) | y_pos, flow->base + DP_FG_POS); 121 122 ipu_srm_dp_update(priv->ipu, true); 123 124 return 0; 125 } 126 EXPORT_SYMBOL_GPL(ipu_dp_set_window_pos); 127 128 static void ipu_dp_csc_init(struct ipu_flow *flow, 129 enum drm_color_encoding ycbcr_enc, 130 enum drm_color_range range, 131 enum ipu_color_space in, 132 enum ipu_color_space out, 133 u32 place) 134 { 135 u32 reg; 136 137 reg = readl(flow->base + DP_COM_CONF); 138 reg &= ~DP_COM_CONF_CSC_DEF_MASK; 139 140 if (in == out) { 141 writel(reg, flow->base + DP_COM_CONF); 142 return; 143 } 144 145 if (in == IPUV3_COLORSPACE_RGB && out == IPUV3_COLORSPACE_YUV) { 146 writel(0x099 | (0x12d << 16), flow->base + DP_CSC_A_0); 147 writel(0x03a | (0x3a9 << 16), flow->base + DP_CSC_A_1); 148 writel(0x356 | (0x100 << 16), flow->base + DP_CSC_A_2); 149 writel(0x100 | (0x329 << 16), flow->base + DP_CSC_A_3); 150 writel(0x3d6 | (0x0000 << 16) | (2 << 30), 151 flow->base + DP_CSC_0); 152 writel(0x200 | (2 << 14) | (0x200 << 16) | (2 << 30), 153 flow->base + DP_CSC_1); 154 } else if (ycbcr_enc == DRM_COLOR_YCBCR_BT709) { 155 /* Rec.709 limited range */ 156 writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0); 157 writel(0x0e5 | (0x095 << 16), flow->base + DP_CSC_A_1); 158 writel(0x3e5 | (0x3bc << 16), flow->base + DP_CSC_A_2); 159 writel(0x095 | (0x10e << 16), flow->base + DP_CSC_A_3); 160 writel(0x000 | (0x3e10 << 16) | (1 << 30), 161 flow->base + DP_CSC_0); 162 writel(0x09a | (1 << 14) | (0x3dbe << 16) | (1 << 30), 163 flow->base + DP_CSC_1); 164 } else { 165 /* BT.601 limited range */ 166 writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0); 167 writel(0x0cc | (0x095 << 16), flow->base + DP_CSC_A_1); 168 writel(0x3ce | (0x398 << 16), flow->base + DP_CSC_A_2); 169 writel(0x095 | (0x0ff << 16), flow->base + DP_CSC_A_3); 170 writel(0x000 | (0x3e42 << 16) | (1 << 30), 171 flow->base + DP_CSC_0); 172 writel(0x10a | (1 << 14) | (0x3dd6 << 16) | (1 << 30), 173 flow->base + DP_CSC_1); 174 } 175 176 reg |= place; 177 178 writel(reg, flow->base + DP_COM_CONF); 179 } 180 181 int ipu_dp_setup_channel(struct ipu_dp *dp, 182 enum drm_color_encoding ycbcr_enc, 183 enum drm_color_range range, 184 enum ipu_color_space in, 185 enum ipu_color_space out) 186 { 187 struct ipu_flow *flow = to_flow(dp); 188 struct ipu_dp_priv *priv = flow->priv; 189 190 mutex_lock(&priv->mutex); 191 192 dp->in_cs = in; 193 194 if (!dp->foreground) 195 flow->out_cs = out; 196 197 if (flow->foreground.in_cs == flow->background.in_cs) { 198 /* 199 * foreground and background are of same colorspace, put 200 * colorspace converter after combining unit. 201 */ 202 ipu_dp_csc_init(flow, ycbcr_enc, range, 203 flow->foreground.in_cs, flow->out_cs, 204 DP_COM_CONF_CSC_DEF_BOTH); 205 } else { 206 if (flow->foreground.in_cs == IPUV3_COLORSPACE_UNKNOWN || 207 flow->foreground.in_cs == flow->out_cs) 208 /* 209 * foreground identical to output, apply color 210 * conversion on background 211 */ 212 ipu_dp_csc_init(flow, ycbcr_enc, range, 213 flow->background.in_cs, 214 flow->out_cs, DP_COM_CONF_CSC_DEF_BG); 215 else 216 ipu_dp_csc_init(flow, ycbcr_enc, range, 217 flow->foreground.in_cs, 218 flow->out_cs, DP_COM_CONF_CSC_DEF_FG); 219 } 220 221 ipu_srm_dp_update(priv->ipu, true); 222 223 mutex_unlock(&priv->mutex); 224 225 return 0; 226 } 227 EXPORT_SYMBOL_GPL(ipu_dp_setup_channel); 228 229 int ipu_dp_enable(struct ipu_soc *ipu) 230 { 231 struct ipu_dp_priv *priv = ipu->dp_priv; 232 233 mutex_lock(&priv->mutex); 234 235 if (!priv->use_count) 236 ipu_module_enable(priv->ipu, IPU_CONF_DP_EN); 237 238 priv->use_count++; 239 240 mutex_unlock(&priv->mutex); 241 242 return 0; 243 } 244 EXPORT_SYMBOL_GPL(ipu_dp_enable); 245 246 int ipu_dp_enable_channel(struct ipu_dp *dp) 247 { 248 struct ipu_flow *flow = to_flow(dp); 249 struct ipu_dp_priv *priv = flow->priv; 250 u32 reg; 251 252 if (!dp->foreground) 253 return 0; 254 255 mutex_lock(&priv->mutex); 256 257 reg = readl(flow->base + DP_COM_CONF); 258 reg |= DP_COM_CONF_FG_EN; 259 writel(reg, flow->base + DP_COM_CONF); 260 261 ipu_srm_dp_update(priv->ipu, true); 262 263 mutex_unlock(&priv->mutex); 264 265 return 0; 266 } 267 EXPORT_SYMBOL_GPL(ipu_dp_enable_channel); 268 269 void ipu_dp_disable_channel(struct ipu_dp *dp, bool sync) 270 { 271 struct ipu_flow *flow = to_flow(dp); 272 struct ipu_dp_priv *priv = flow->priv; 273 u32 reg, csc; 274 275 dp->in_cs = IPUV3_COLORSPACE_UNKNOWN; 276 277 if (!dp->foreground) 278 return; 279 280 mutex_lock(&priv->mutex); 281 282 reg = readl(flow->base + DP_COM_CONF); 283 csc = reg & DP_COM_CONF_CSC_DEF_MASK; 284 reg &= ~DP_COM_CONF_CSC_DEF_MASK; 285 if (csc == DP_COM_CONF_CSC_DEF_BOTH || csc == DP_COM_CONF_CSC_DEF_BG) 286 reg |= DP_COM_CONF_CSC_DEF_BG; 287 288 reg &= ~DP_COM_CONF_FG_EN; 289 writel(reg, flow->base + DP_COM_CONF); 290 291 writel(0, flow->base + DP_FG_POS); 292 ipu_srm_dp_update(priv->ipu, sync); 293 294 mutex_unlock(&priv->mutex); 295 } 296 EXPORT_SYMBOL_GPL(ipu_dp_disable_channel); 297 298 void ipu_dp_disable(struct ipu_soc *ipu) 299 { 300 struct ipu_dp_priv *priv = ipu->dp_priv; 301 302 mutex_lock(&priv->mutex); 303 304 priv->use_count--; 305 306 if (!priv->use_count) 307 ipu_module_disable(priv->ipu, IPU_CONF_DP_EN); 308 309 if (priv->use_count < 0) 310 priv->use_count = 0; 311 312 mutex_unlock(&priv->mutex); 313 } 314 EXPORT_SYMBOL_GPL(ipu_dp_disable); 315 316 struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow) 317 { 318 struct ipu_dp_priv *priv = ipu->dp_priv; 319 struct ipu_dp *dp; 320 321 if ((flow >> 1) >= IPUV3_NUM_FLOWS) 322 return ERR_PTR(-EINVAL); 323 324 if (flow & 1) 325 dp = &priv->flow[flow >> 1].foreground; 326 else 327 dp = &priv->flow[flow >> 1].background; 328 329 if (dp->in_use) 330 return ERR_PTR(-EBUSY); 331 332 dp->in_use = true; 333 334 return dp; 335 } 336 EXPORT_SYMBOL_GPL(ipu_dp_get); 337 338 void ipu_dp_put(struct ipu_dp *dp) 339 { 340 dp->in_use = false; 341 } 342 EXPORT_SYMBOL_GPL(ipu_dp_put); 343 344 int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base) 345 { 346 struct ipu_dp_priv *priv; 347 int i; 348 349 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 350 if (!priv) 351 return -ENOMEM; 352 priv->dev = dev; 353 priv->ipu = ipu; 354 355 ipu->dp_priv = priv; 356 357 priv->base = devm_ioremap(dev, base, PAGE_SIZE); 358 if (!priv->base) 359 return -ENOMEM; 360 361 mutex_init(&priv->mutex); 362 363 for (i = 0; i < IPUV3_NUM_FLOWS; i++) { 364 priv->flow[i].background.in_cs = IPUV3_COLORSPACE_UNKNOWN; 365 priv->flow[i].foreground.in_cs = IPUV3_COLORSPACE_UNKNOWN; 366 priv->flow[i].foreground.foreground = true; 367 priv->flow[i].base = priv->base + ipu_dp_flow_base[i]; 368 priv->flow[i].priv = priv; 369 } 370 371 return 0; 372 } 373 374 void ipu_dp_exit(struct ipu_soc *ipu) 375 { 376 } 377