1 /*
2 * Copyright (c) 2015 MediaTek Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #include <linux/clk.h>
15 #include <linux/iopoll.h>
16 #include <linux/module.h>
17 #include <linux/of_device.h>
18 #include <linux/platform_device.h>
19 #include <linux/regmap.h>
20
21 #include "mtk_drm_ddp.h"
22 #include "mtk_drm_ddp_comp.h"
23
24 #define DISP_REG_CONFIG_DISP_OVL0_MOUT_EN 0x040
25 #define DISP_REG_CONFIG_DISP_OVL1_MOUT_EN 0x044
26 #define DISP_REG_CONFIG_DISP_OD_MOUT_EN 0x048
27 #define DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN 0x04c
28 #define DISP_REG_CONFIG_DISP_UFOE_MOUT_EN 0x050
29 #define DISP_REG_CONFIG_DISP_COLOR0_SEL_IN 0x084
30 #define DISP_REG_CONFIG_DISP_COLOR1_SEL_IN 0x088
31 #define DISP_REG_CONFIG_DPI_SEL_IN 0x0ac
32 #define DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN 0x0c8
33 #define DISP_REG_CONFIG_MMSYS_CG_CON0 0x100
34
35 #define DISP_REG_CONFIG_DISP_OVL_MOUT_EN 0x030
36 #define DISP_REG_CONFIG_OUT_SEL 0x04c
37 #define DISP_REG_CONFIG_DSI_SEL 0x050
38
39 #define DISP_REG_MUTEX_EN(n) (0x20 + 0x20 * (n))
40 #define DISP_REG_MUTEX(n) (0x24 + 0x20 * (n))
41 #define DISP_REG_MUTEX_RST(n) (0x28 + 0x20 * (n))
42 #define DISP_REG_MUTEX_MOD(n) (0x2c + 0x20 * (n))
43 #define DISP_REG_MUTEX_SOF(n) (0x30 + 0x20 * (n))
44
45 #define INT_MUTEX BIT(1)
46
47 #define MT8173_MUTEX_MOD_DISP_OVL0 BIT(11)
48 #define MT8173_MUTEX_MOD_DISP_OVL1 BIT(12)
49 #define MT8173_MUTEX_MOD_DISP_RDMA0 BIT(13)
50 #define MT8173_MUTEX_MOD_DISP_RDMA1 BIT(14)
51 #define MT8173_MUTEX_MOD_DISP_RDMA2 BIT(15)
52 #define MT8173_MUTEX_MOD_DISP_WDMA0 BIT(16)
53 #define MT8173_MUTEX_MOD_DISP_WDMA1 BIT(17)
54 #define MT8173_MUTEX_MOD_DISP_COLOR0 BIT(18)
55 #define MT8173_MUTEX_MOD_DISP_COLOR1 BIT(19)
56 #define MT8173_MUTEX_MOD_DISP_AAL BIT(20)
57 #define MT8173_MUTEX_MOD_DISP_GAMMA BIT(21)
58 #define MT8173_MUTEX_MOD_DISP_UFOE BIT(22)
59 #define MT8173_MUTEX_MOD_DISP_PWM0 BIT(23)
60 #define MT8173_MUTEX_MOD_DISP_PWM1 BIT(24)
61 #define MT8173_MUTEX_MOD_DISP_OD BIT(25)
62
63 #define MT2701_MUTEX_MOD_DISP_OVL BIT(3)
64 #define MT2701_MUTEX_MOD_DISP_WDMA BIT(6)
65 #define MT2701_MUTEX_MOD_DISP_COLOR BIT(7)
66 #define MT2701_MUTEX_MOD_DISP_BLS BIT(9)
67 #define MT2701_MUTEX_MOD_DISP_RDMA0 BIT(10)
68 #define MT2701_MUTEX_MOD_DISP_RDMA1 BIT(12)
69
70 #define MUTEX_SOF_SINGLE_MODE 0
71 #define MUTEX_SOF_DSI0 1
72 #define MUTEX_SOF_DSI1 2
73 #define MUTEX_SOF_DPI0 3
74
75 #define OVL0_MOUT_EN_COLOR0 0x1
76 #define OD_MOUT_EN_RDMA0 0x1
77 #define UFOE_MOUT_EN_DSI0 0x1
78 #define COLOR0_SEL_IN_OVL0 0x1
79 #define OVL1_MOUT_EN_COLOR1 0x1
80 #define GAMMA_MOUT_EN_RDMA1 0x1
81 #define RDMA1_MOUT_DPI0 0x2
82 #define DPI0_SEL_IN_RDMA1 0x1
83 #define COLOR1_SEL_IN_OVL1 0x1
84
85 #define OVL_MOUT_EN_RDMA 0x1
86 #define BLS_TO_DSI_RDMA1_TO_DPI1 0x8
87 #define DSI_SEL_IN_BLS 0x0
88
89 struct mtk_disp_mutex {
90 int id;
91 bool claimed;
92 };
93
94 struct mtk_ddp {
95 struct device *dev;
96 struct clk *clk;
97 void __iomem *regs;
98 struct mtk_disp_mutex mutex[10];
99 const unsigned int *mutex_mod;
100 };
101
102 static const unsigned int mt2701_mutex_mod[DDP_COMPONENT_ID_MAX] = {
103 [DDP_COMPONENT_BLS] = MT2701_MUTEX_MOD_DISP_BLS,
104 [DDP_COMPONENT_COLOR0] = MT2701_MUTEX_MOD_DISP_COLOR,
105 [DDP_COMPONENT_OVL0] = MT2701_MUTEX_MOD_DISP_OVL,
106 [DDP_COMPONENT_RDMA0] = MT2701_MUTEX_MOD_DISP_RDMA0,
107 [DDP_COMPONENT_RDMA1] = MT2701_MUTEX_MOD_DISP_RDMA1,
108 [DDP_COMPONENT_WDMA0] = MT2701_MUTEX_MOD_DISP_WDMA,
109 };
110
111 static const unsigned int mt8173_mutex_mod[DDP_COMPONENT_ID_MAX] = {
112 [DDP_COMPONENT_AAL] = MT8173_MUTEX_MOD_DISP_AAL,
113 [DDP_COMPONENT_COLOR0] = MT8173_MUTEX_MOD_DISP_COLOR0,
114 [DDP_COMPONENT_COLOR1] = MT8173_MUTEX_MOD_DISP_COLOR1,
115 [DDP_COMPONENT_GAMMA] = MT8173_MUTEX_MOD_DISP_GAMMA,
116 [DDP_COMPONENT_OD] = MT8173_MUTEX_MOD_DISP_OD,
117 [DDP_COMPONENT_OVL0] = MT8173_MUTEX_MOD_DISP_OVL0,
118 [DDP_COMPONENT_OVL1] = MT8173_MUTEX_MOD_DISP_OVL1,
119 [DDP_COMPONENT_PWM0] = MT8173_MUTEX_MOD_DISP_PWM0,
120 [DDP_COMPONENT_PWM1] = MT8173_MUTEX_MOD_DISP_PWM1,
121 [DDP_COMPONENT_RDMA0] = MT8173_MUTEX_MOD_DISP_RDMA0,
122 [DDP_COMPONENT_RDMA1] = MT8173_MUTEX_MOD_DISP_RDMA1,
123 [DDP_COMPONENT_RDMA2] = MT8173_MUTEX_MOD_DISP_RDMA2,
124 [DDP_COMPONENT_UFOE] = MT8173_MUTEX_MOD_DISP_UFOE,
125 [DDP_COMPONENT_WDMA0] = MT8173_MUTEX_MOD_DISP_WDMA0,
126 [DDP_COMPONENT_WDMA1] = MT8173_MUTEX_MOD_DISP_WDMA1,
127 };
128
mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,enum mtk_ddp_comp_id next,unsigned int * addr)129 static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
130 enum mtk_ddp_comp_id next,
131 unsigned int *addr)
132 {
133 unsigned int value;
134
135 if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
136 *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
137 value = OVL0_MOUT_EN_COLOR0;
138 } else if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_RDMA0) {
139 *addr = DISP_REG_CONFIG_DISP_OVL_MOUT_EN;
140 value = OVL_MOUT_EN_RDMA;
141 } else if (cur == DDP_COMPONENT_OD && next == DDP_COMPONENT_RDMA0) {
142 *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
143 value = OD_MOUT_EN_RDMA0;
144 } else if (cur == DDP_COMPONENT_UFOE && next == DDP_COMPONENT_DSI0) {
145 *addr = DISP_REG_CONFIG_DISP_UFOE_MOUT_EN;
146 value = UFOE_MOUT_EN_DSI0;
147 } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
148 *addr = DISP_REG_CONFIG_DISP_OVL1_MOUT_EN;
149 value = OVL1_MOUT_EN_COLOR1;
150 } else if (cur == DDP_COMPONENT_GAMMA && next == DDP_COMPONENT_RDMA1) {
151 *addr = DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN;
152 value = GAMMA_MOUT_EN_RDMA1;
153 } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
154 *addr = DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN;
155 value = RDMA1_MOUT_DPI0;
156 } else {
157 value = 0;
158 }
159
160 return value;
161 }
162
mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,enum mtk_ddp_comp_id next,unsigned int * addr)163 static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
164 enum mtk_ddp_comp_id next,
165 unsigned int *addr)
166 {
167 unsigned int value;
168
169 if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
170 *addr = DISP_REG_CONFIG_DISP_COLOR0_SEL_IN;
171 value = COLOR0_SEL_IN_OVL0;
172 } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
173 *addr = DISP_REG_CONFIG_DPI_SEL_IN;
174 value = DPI0_SEL_IN_RDMA1;
175 } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
176 *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
177 value = COLOR1_SEL_IN_OVL1;
178 } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
179 *addr = DISP_REG_CONFIG_DSI_SEL;
180 value = DSI_SEL_IN_BLS;
181 } else {
182 value = 0;
183 }
184
185 return value;
186 }
187
mtk_ddp_sout_sel(void __iomem * config_regs,enum mtk_ddp_comp_id cur,enum mtk_ddp_comp_id next)188 static void mtk_ddp_sout_sel(void __iomem *config_regs,
189 enum mtk_ddp_comp_id cur,
190 enum mtk_ddp_comp_id next)
191 {
192 if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0)
193 writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
194 config_regs + DISP_REG_CONFIG_OUT_SEL);
195 }
196
mtk_ddp_add_comp_to_path(void __iomem * config_regs,enum mtk_ddp_comp_id cur,enum mtk_ddp_comp_id next)197 void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
198 enum mtk_ddp_comp_id cur,
199 enum mtk_ddp_comp_id next)
200 {
201 unsigned int addr, value, reg;
202
203 value = mtk_ddp_mout_en(cur, next, &addr);
204 if (value) {
205 reg = readl_relaxed(config_regs + addr) | value;
206 writel_relaxed(reg, config_regs + addr);
207 }
208
209 mtk_ddp_sout_sel(config_regs, cur, next);
210
211 value = mtk_ddp_sel_in(cur, next, &addr);
212 if (value) {
213 reg = readl_relaxed(config_regs + addr) | value;
214 writel_relaxed(reg, config_regs + addr);
215 }
216 }
217
mtk_ddp_remove_comp_from_path(void __iomem * config_regs,enum mtk_ddp_comp_id cur,enum mtk_ddp_comp_id next)218 void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
219 enum mtk_ddp_comp_id cur,
220 enum mtk_ddp_comp_id next)
221 {
222 unsigned int addr, value, reg;
223
224 value = mtk_ddp_mout_en(cur, next, &addr);
225 if (value) {
226 reg = readl_relaxed(config_regs + addr) & ~value;
227 writel_relaxed(reg, config_regs + addr);
228 }
229
230 value = mtk_ddp_sel_in(cur, next, &addr);
231 if (value) {
232 reg = readl_relaxed(config_regs + addr) & ~value;
233 writel_relaxed(reg, config_regs + addr);
234 }
235 }
236
mtk_disp_mutex_get(struct device * dev,unsigned int id)237 struct mtk_disp_mutex *mtk_disp_mutex_get(struct device *dev, unsigned int id)
238 {
239 struct mtk_ddp *ddp = dev_get_drvdata(dev);
240
241 if (id >= 10)
242 return ERR_PTR(-EINVAL);
243 if (ddp->mutex[id].claimed)
244 return ERR_PTR(-EBUSY);
245
246 ddp->mutex[id].claimed = true;
247
248 return &ddp->mutex[id];
249 }
250
mtk_disp_mutex_put(struct mtk_disp_mutex * mutex)251 void mtk_disp_mutex_put(struct mtk_disp_mutex *mutex)
252 {
253 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
254 mutex[mutex->id]);
255
256 WARN_ON(&ddp->mutex[mutex->id] != mutex);
257
258 mutex->claimed = false;
259 }
260
mtk_disp_mutex_prepare(struct mtk_disp_mutex * mutex)261 int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex)
262 {
263 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
264 mutex[mutex->id]);
265 return clk_prepare_enable(ddp->clk);
266 }
267
mtk_disp_mutex_unprepare(struct mtk_disp_mutex * mutex)268 void mtk_disp_mutex_unprepare(struct mtk_disp_mutex *mutex)
269 {
270 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
271 mutex[mutex->id]);
272 clk_disable_unprepare(ddp->clk);
273 }
274
mtk_disp_mutex_add_comp(struct mtk_disp_mutex * mutex,enum mtk_ddp_comp_id id)275 void mtk_disp_mutex_add_comp(struct mtk_disp_mutex *mutex,
276 enum mtk_ddp_comp_id id)
277 {
278 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
279 mutex[mutex->id]);
280 unsigned int reg;
281
282 WARN_ON(&ddp->mutex[mutex->id] != mutex);
283
284 switch (id) {
285 case DDP_COMPONENT_DSI0:
286 reg = MUTEX_SOF_DSI0;
287 break;
288 case DDP_COMPONENT_DSI1:
289 reg = MUTEX_SOF_DSI0;
290 break;
291 case DDP_COMPONENT_DPI0:
292 reg = MUTEX_SOF_DPI0;
293 break;
294 default:
295 reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
296 reg |= ddp->mutex_mod[id];
297 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
298 return;
299 }
300
301 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
302 }
303
mtk_disp_mutex_remove_comp(struct mtk_disp_mutex * mutex,enum mtk_ddp_comp_id id)304 void mtk_disp_mutex_remove_comp(struct mtk_disp_mutex *mutex,
305 enum mtk_ddp_comp_id id)
306 {
307 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
308 mutex[mutex->id]);
309 unsigned int reg;
310
311 WARN_ON(&ddp->mutex[mutex->id] != mutex);
312
313 switch (id) {
314 case DDP_COMPONENT_DSI0:
315 case DDP_COMPONENT_DSI1:
316 case DDP_COMPONENT_DPI0:
317 writel_relaxed(MUTEX_SOF_SINGLE_MODE,
318 ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
319 break;
320 default:
321 reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
322 reg &= ~(ddp->mutex_mod[id]);
323 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
324 break;
325 }
326 }
327
mtk_disp_mutex_enable(struct mtk_disp_mutex * mutex)328 void mtk_disp_mutex_enable(struct mtk_disp_mutex *mutex)
329 {
330 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
331 mutex[mutex->id]);
332
333 WARN_ON(&ddp->mutex[mutex->id] != mutex);
334
335 writel(1, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
336 }
337
mtk_disp_mutex_disable(struct mtk_disp_mutex * mutex)338 void mtk_disp_mutex_disable(struct mtk_disp_mutex *mutex)
339 {
340 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
341 mutex[mutex->id]);
342
343 WARN_ON(&ddp->mutex[mutex->id] != mutex);
344
345 writel(0, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
346 }
347
mtk_disp_mutex_acquire(struct mtk_disp_mutex * mutex)348 void mtk_disp_mutex_acquire(struct mtk_disp_mutex *mutex)
349 {
350 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
351 mutex[mutex->id]);
352 u32 tmp;
353
354 writel(1, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
355 writel(1, ddp->regs + DISP_REG_MUTEX(mutex->id));
356 if (readl_poll_timeout_atomic(ddp->regs + DISP_REG_MUTEX(mutex->id),
357 tmp, tmp & INT_MUTEX, 1, 10000))
358 pr_err("could not acquire mutex %d\n", mutex->id);
359 }
360
mtk_disp_mutex_release(struct mtk_disp_mutex * mutex)361 void mtk_disp_mutex_release(struct mtk_disp_mutex *mutex)
362 {
363 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
364 mutex[mutex->id]);
365
366 writel(0, ddp->regs + DISP_REG_MUTEX(mutex->id));
367 }
368
mtk_ddp_probe(struct platform_device * pdev)369 static int mtk_ddp_probe(struct platform_device *pdev)
370 {
371 struct device *dev = &pdev->dev;
372 struct mtk_ddp *ddp;
373 struct resource *regs;
374 int i;
375
376 ddp = devm_kzalloc(dev, sizeof(*ddp), GFP_KERNEL);
377 if (!ddp)
378 return -ENOMEM;
379
380 for (i = 0; i < 10; i++)
381 ddp->mutex[i].id = i;
382
383 ddp->clk = devm_clk_get(dev, NULL);
384 if (IS_ERR(ddp->clk)) {
385 dev_err(dev, "Failed to get clock\n");
386 return PTR_ERR(ddp->clk);
387 }
388
389 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
390 ddp->regs = devm_ioremap_resource(dev, regs);
391 if (IS_ERR(ddp->regs)) {
392 dev_err(dev, "Failed to map mutex registers\n");
393 return PTR_ERR(ddp->regs);
394 }
395
396 ddp->mutex_mod = of_device_get_match_data(dev);
397
398 platform_set_drvdata(pdev, ddp);
399
400 return 0;
401 }
402
mtk_ddp_remove(struct platform_device * pdev)403 static int mtk_ddp_remove(struct platform_device *pdev)
404 {
405 return 0;
406 }
407
408 static const struct of_device_id ddp_driver_dt_match[] = {
409 { .compatible = "mediatek,mt2701-disp-mutex", .data = mt2701_mutex_mod},
410 { .compatible = "mediatek,mt8173-disp-mutex", .data = mt8173_mutex_mod},
411 {},
412 };
413 MODULE_DEVICE_TABLE(of, ddp_driver_dt_match);
414
415 struct platform_driver mtk_ddp_driver = {
416 .probe = mtk_ddp_probe,
417 .remove = mtk_ddp_remove,
418 .driver = {
419 .name = "mediatek-ddp",
420 .owner = THIS_MODULE,
421 .of_match_table = ddp_driver_dt_match,
422 },
423 };
424