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
to_flow(struct ipu_dp * dp)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
ipu_dp_set_global_alpha(struct ipu_dp * dp,bool enable,u8 alpha,bool bg_chan)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
ipu_dp_set_window_pos(struct ipu_dp * dp,u16 x_pos,u16 y_pos)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
ipu_dp_csc_init(struct ipu_flow * flow,enum ipu_color_space in,enum ipu_color_space out,u32 place)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
ipu_dp_setup_channel(struct ipu_dp * dp,enum ipu_color_space in,enum ipu_color_space out)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
ipu_dp_enable(struct ipu_soc * ipu)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
ipu_dp_enable_channel(struct ipu_dp * dp)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
ipu_dp_disable_channel(struct ipu_dp * dp,bool sync)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
ipu_dp_disable(struct ipu_soc * ipu)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
ipu_dp_get(struct ipu_soc * ipu,unsigned int flow)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
ipu_dp_put(struct ipu_dp * dp)328 void ipu_dp_put(struct ipu_dp *dp)
329 {
330 dp->in_use = false;
331 }
332 EXPORT_SYMBOL_GPL(ipu_dp_put);
333
ipu_dp_init(struct ipu_soc * ipu,struct device * dev,unsigned long base)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
ipu_dp_exit(struct ipu_soc * ipu)364 void ipu_dp_exit(struct ipu_soc *ipu)
365 {
366 }
367