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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/module.h>
16#include <linux/of_device.h>
17#include <linux/platform_device.h>
18#include <linux/regmap.h>
19
20#include "mtk_drm_ddp.h"
21#include "mtk_drm_ddp_comp.h"
22
23#define DISP_REG_CONFIG_DISP_OVL0_MOUT_EN 0x040
24#define DISP_REG_CONFIG_DISP_OVL1_MOUT_EN 0x044
25#define DISP_REG_CONFIG_DISP_OD_MOUT_EN 0x048
26#define DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN 0x04c
27#define DISP_REG_CONFIG_DISP_UFOE_MOUT_EN 0x050
28#define DISP_REG_CONFIG_DISP_COLOR0_SEL_IN 0x084
29#define DISP_REG_CONFIG_DISP_COLOR1_SEL_IN 0x088
30#define DISP_REG_CONFIG_DPI_SEL_IN 0x0ac
31#define DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN 0x0c8
32#define DISP_REG_CONFIG_MMSYS_CG_CON0 0x100
33
34#define DISP_REG_MUTEX_EN(n) (0x20 + 0x20 * (n))
35#define DISP_REG_MUTEX_RST(n) (0x28 + 0x20 * (n))
36#define DISP_REG_MUTEX_MOD(n) (0x2c + 0x20 * (n))
37#define DISP_REG_MUTEX_SOF(n) (0x30 + 0x20 * (n))
38
39#define MUTEX_MOD_DISP_OVL0 BIT(11)
40#define MUTEX_MOD_DISP_OVL1 BIT(12)
41#define MUTEX_MOD_DISP_RDMA0 BIT(13)
42#define MUTEX_MOD_DISP_RDMA1 BIT(14)
43#define MUTEX_MOD_DISP_RDMA2 BIT(15)
44#define MUTEX_MOD_DISP_WDMA0 BIT(16)
45#define MUTEX_MOD_DISP_WDMA1 BIT(17)
46#define MUTEX_MOD_DISP_COLOR0 BIT(18)
47#define MUTEX_MOD_DISP_COLOR1 BIT(19)
48#define MUTEX_MOD_DISP_AAL BIT(20)
49#define MUTEX_MOD_DISP_GAMMA BIT(21)
50#define MUTEX_MOD_DISP_UFOE BIT(22)
51#define MUTEX_MOD_DISP_PWM0 BIT(23)
52#define MUTEX_MOD_DISP_PWM1 BIT(24)
53#define MUTEX_MOD_DISP_OD BIT(25)
54
55#define MUTEX_SOF_SINGLE_MODE 0
56#define MUTEX_SOF_DSI0 1
57#define MUTEX_SOF_DSI1 2
58#define MUTEX_SOF_DPI0 3
59
60#define OVL0_MOUT_EN_COLOR0 0x1
61#define OD_MOUT_EN_RDMA0 0x1
62#define UFOE_MOUT_EN_DSI0 0x1
63#define COLOR0_SEL_IN_OVL0 0x1
64#define OVL1_MOUT_EN_COLOR1 0x1
65#define GAMMA_MOUT_EN_RDMA1 0x1
66#define RDMA1_MOUT_DPI0 0x2
67#define DPI0_SEL_IN_RDMA1 0x1
68#define COLOR1_SEL_IN_OVL1 0x1
69
70struct mtk_disp_mutex {
71 int id;
72 bool claimed;
73};
74
75struct mtk_ddp {
76 struct device *dev;
77 struct clk *clk;
78 void __iomem *regs;
79 struct mtk_disp_mutex mutex[10];
80};
81
82static const unsigned int mutex_mod[DDP_COMPONENT_ID_MAX] = {
83 [DDP_COMPONENT_AAL] = MUTEX_MOD_DISP_AAL,
84 [DDP_COMPONENT_COLOR0] = MUTEX_MOD_DISP_COLOR0,
85 [DDP_COMPONENT_COLOR1] = MUTEX_MOD_DISP_COLOR1,
86 [DDP_COMPONENT_GAMMA] = MUTEX_MOD_DISP_GAMMA,
87 [DDP_COMPONENT_OD] = MUTEX_MOD_DISP_OD,
88 [DDP_COMPONENT_OVL0] = MUTEX_MOD_DISP_OVL0,
89 [DDP_COMPONENT_OVL1] = MUTEX_MOD_DISP_OVL1,
90 [DDP_COMPONENT_PWM0] = MUTEX_MOD_DISP_PWM0,
91 [DDP_COMPONENT_PWM1] = MUTEX_MOD_DISP_PWM1,
92 [DDP_COMPONENT_RDMA0] = MUTEX_MOD_DISP_RDMA0,
93 [DDP_COMPONENT_RDMA1] = MUTEX_MOD_DISP_RDMA1,
94 [DDP_COMPONENT_RDMA2] = MUTEX_MOD_DISP_RDMA2,
95 [DDP_COMPONENT_UFOE] = MUTEX_MOD_DISP_UFOE,
96 [DDP_COMPONENT_WDMA0] = MUTEX_MOD_DISP_WDMA0,
97 [DDP_COMPONENT_WDMA1] = MUTEX_MOD_DISP_WDMA1,
98};
99
100static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
101 enum mtk_ddp_comp_id next,
102 unsigned int *addr)
103{
104 unsigned int value;
105
106 if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
107 *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
108 value = OVL0_MOUT_EN_COLOR0;
109 } else if (cur == DDP_COMPONENT_OD && next == DDP_COMPONENT_RDMA0) {
110 *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
111 value = OD_MOUT_EN_RDMA0;
112 } else if (cur == DDP_COMPONENT_UFOE && next == DDP_COMPONENT_DSI0) {
113 *addr = DISP_REG_CONFIG_DISP_UFOE_MOUT_EN;
114 value = UFOE_MOUT_EN_DSI0;
115 } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
116 *addr = DISP_REG_CONFIG_DISP_OVL1_MOUT_EN;
117 value = OVL1_MOUT_EN_COLOR1;
118 } else if (cur == DDP_COMPONENT_GAMMA && next == DDP_COMPONENT_RDMA1) {
119 *addr = DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN;
120 value = GAMMA_MOUT_EN_RDMA1;
121 } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
122 *addr = DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN;
123 value = RDMA1_MOUT_DPI0;
124 } else {
125 value = 0;
126 }
127
128 return value;
129}
130
131static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
132 enum mtk_ddp_comp_id next,
133 unsigned int *addr)
134{
135 unsigned int value;
136
137 if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
138 *addr = DISP_REG_CONFIG_DISP_COLOR0_SEL_IN;
139 value = COLOR0_SEL_IN_OVL0;
140 } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
141 *addr = DISP_REG_CONFIG_DPI_SEL_IN;
142 value = DPI0_SEL_IN_RDMA1;
143 } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
144 *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
145 value = COLOR1_SEL_IN_OVL1;
146 } else {
147 value = 0;
148 }
149
150 return value;
151}
152
153void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
154 enum mtk_ddp_comp_id cur,
155 enum mtk_ddp_comp_id next)
156{
157 unsigned int addr, value, reg;
158
159 value = mtk_ddp_mout_en(cur, next, &addr);
160 if (value) {
161 reg = readl_relaxed(config_regs + addr) | value;
162 writel_relaxed(reg, config_regs + addr);
163 }
164
165 value = mtk_ddp_sel_in(cur, next, &addr);
166 if (value) {
167 reg = readl_relaxed(config_regs + addr) | value;
168 writel_relaxed(reg, config_regs + addr);
169 }
170}
171
172void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
173 enum mtk_ddp_comp_id cur,
174 enum mtk_ddp_comp_id next)
175{
176 unsigned int addr, value, reg;
177
178 value = mtk_ddp_mout_en(cur, next, &addr);
179 if (value) {
180 reg = readl_relaxed(config_regs + addr) & ~value;
181 writel_relaxed(reg, config_regs + addr);
182 }
183
184 value = mtk_ddp_sel_in(cur, next, &addr);
185 if (value) {
186 reg = readl_relaxed(config_regs + addr) & ~value;
187 writel_relaxed(reg, config_regs + addr);
188 }
189}
190
191struct mtk_disp_mutex *mtk_disp_mutex_get(struct device *dev, unsigned int id)
192{
193 struct mtk_ddp *ddp = dev_get_drvdata(dev);
194
195 if (id >= 10)
196 return ERR_PTR(-EINVAL);
197 if (ddp->mutex[id].claimed)
198 return ERR_PTR(-EBUSY);
199
200 ddp->mutex[id].claimed = true;
201
202 return &ddp->mutex[id];
203}
204
205void mtk_disp_mutex_put(struct mtk_disp_mutex *mutex)
206{
207 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
208 mutex[mutex->id]);
209
210 WARN_ON(&ddp->mutex[mutex->id] != mutex);
211
212 mutex->claimed = false;
213}
214
215int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex)
216{
217 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
218 mutex[mutex->id]);
219 return clk_prepare_enable(ddp->clk);
220}
221
222void mtk_disp_mutex_unprepare(struct mtk_disp_mutex *mutex)
223{
224 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
225 mutex[mutex->id]);
226 clk_disable_unprepare(ddp->clk);
227}
228
229void mtk_disp_mutex_add_comp(struct mtk_disp_mutex *mutex,
230 enum mtk_ddp_comp_id id)
231{
232 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
233 mutex[mutex->id]);
234 unsigned int reg;
235
236 WARN_ON(&ddp->mutex[mutex->id] != mutex);
237
238 switch (id) {
239 case DDP_COMPONENT_DSI0:
240 reg = MUTEX_SOF_DSI0;
241 break;
242 case DDP_COMPONENT_DSI1:
243 reg = MUTEX_SOF_DSI0;
244 break;
245 case DDP_COMPONENT_DPI0:
246 reg = MUTEX_SOF_DPI0;
247 break;
248 default:
249 reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
250 reg |= mutex_mod[id];
251 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
252 return;
253 }
254
255 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
256}
257
258void mtk_disp_mutex_remove_comp(struct mtk_disp_mutex *mutex,
259 enum mtk_ddp_comp_id id)
260{
261 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
262 mutex[mutex->id]);
263 unsigned int reg;
264
265 WARN_ON(&ddp->mutex[mutex->id] != mutex);
266
267 switch (id) {
268 case DDP_COMPONENT_DSI0:
269 case DDP_COMPONENT_DSI1:
270 case DDP_COMPONENT_DPI0:
271 writel_relaxed(MUTEX_SOF_SINGLE_MODE,
272 ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
273 break;
274 default:
275 reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
276 reg &= ~mutex_mod[id];
277 writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
278 break;
279 }
280}
281
282void mtk_disp_mutex_enable(struct mtk_disp_mutex *mutex)
283{
284 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
285 mutex[mutex->id]);
286
287 WARN_ON(&ddp->mutex[mutex->id] != mutex);
288
289 writel(1, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
290}
291
292void mtk_disp_mutex_disable(struct mtk_disp_mutex *mutex)
293{
294 struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
295 mutex[mutex->id]);
296
297 WARN_ON(&ddp->mutex[mutex->id] != mutex);
298
299 writel(0, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
300}
301
302static int mtk_ddp_probe(struct platform_device *pdev)
303{
304 struct device *dev = &pdev->dev;
305 struct mtk_ddp *ddp;
306 struct resource *regs;
307 int i;
308
309 ddp = devm_kzalloc(dev, sizeof(*ddp), GFP_KERNEL);
310 if (!ddp)
311 return -ENOMEM;
312
313 for (i = 0; i < 10; i++)
314 ddp->mutex[i].id = i;
315
316 ddp->clk = devm_clk_get(dev, NULL);
317 if (IS_ERR(ddp->clk)) {
318 dev_err(dev, "Failed to get clock\n");
319 return PTR_ERR(ddp->clk);
320 }
321
322 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
323 ddp->regs = devm_ioremap_resource(dev, regs);
324 if (IS_ERR(ddp->regs)) {
325 dev_err(dev, "Failed to map mutex registers\n");
326 return PTR_ERR(ddp->regs);
327 }
328
329 platform_set_drvdata(pdev, ddp);
330
331 return 0;
332}
333
334static int mtk_ddp_remove(struct platform_device *pdev)
335{
336 return 0;
337}
338
339static const struct of_device_id ddp_driver_dt_match[] = {
340 { .compatible = "mediatek,mt8173-disp-mutex" },
341 {},
342};
343MODULE_DEVICE_TABLE(of, ddp_driver_dt_match);
344
345struct platform_driver mtk_ddp_driver = {
346 .probe = mtk_ddp_probe,
347 .remove = mtk_ddp_remove,
348 .driver = {
349 .name = "mediatek-ddp",
350 .owner = THIS_MODULE,
351 .of_match_table = ddp_driver_dt_match,
352 },
353};