1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2015-2016 MediaTek Inc.
4 * Author: Houlong Wei <houlong.wei@mediatek.com>
5 * Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
6 */
7
8 #include <linux/clk.h>
9 #include <linux/device.h>
10 #include <linux/errno.h>
11 #include <linux/interrupt.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
16 #include <linux/of_platform.h>
17 #include <linux/platform_device.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/workqueue.h>
20 #include <soc/mediatek/smi.h>
21
22 #include "mtk_mdp_core.h"
23 #include "mtk_mdp_m2m.h"
24 #include "mtk_vpu.h"
25
26 /* MDP debug log level (0-3). 3 shows all the logs. */
27 int mtk_mdp_dbg_level;
28 EXPORT_SYMBOL(mtk_mdp_dbg_level);
29
30 module_param(mtk_mdp_dbg_level, int, 0644);
31
32 static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
33 {
34 .compatible = "mediatek,mt8173-mdp-rdma",
35 .data = (void *)MTK_MDP_RDMA
36 }, {
37 .compatible = "mediatek,mt8173-mdp-rsz",
38 .data = (void *)MTK_MDP_RSZ
39 }, {
40 .compatible = "mediatek,mt8173-mdp-wdma",
41 .data = (void *)MTK_MDP_WDMA
42 }, {
43 .compatible = "mediatek,mt8173-mdp-wrot",
44 .data = (void *)MTK_MDP_WROT
45 },
46 { },
47 };
48
49 static const struct of_device_id mtk_mdp_of_ids[] = {
50 { .compatible = "mediatek,mt8173-mdp", },
51 { },
52 };
53 MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
54
mtk_mdp_clock_on(struct mtk_mdp_dev * mdp)55 static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
56 {
57 struct device *dev = &mdp->pdev->dev;
58 int i;
59
60 for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
61 mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
62 }
63
mtk_mdp_clock_off(struct mtk_mdp_dev * mdp)64 static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
65 {
66 struct device *dev = &mdp->pdev->dev;
67 int i;
68
69 for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
70 mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
71 }
72
mtk_mdp_wdt_worker(struct work_struct * work)73 static void mtk_mdp_wdt_worker(struct work_struct *work)
74 {
75 struct mtk_mdp_dev *mdp =
76 container_of(work, struct mtk_mdp_dev, wdt_work);
77 struct mtk_mdp_ctx *ctx;
78
79 mtk_mdp_err("Watchdog timeout");
80
81 list_for_each_entry(ctx, &mdp->ctx_list, list) {
82 mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
83 mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
84 }
85 }
86
mtk_mdp_reset_handler(void * priv)87 static void mtk_mdp_reset_handler(void *priv)
88 {
89 struct mtk_mdp_dev *mdp = priv;
90
91 queue_work(mdp->wdt_wq, &mdp->wdt_work);
92 }
93
mtk_mdp_probe(struct platform_device * pdev)94 static int mtk_mdp_probe(struct platform_device *pdev)
95 {
96 struct mtk_mdp_dev *mdp;
97 struct device *dev = &pdev->dev;
98 struct device_node *node, *parent;
99 int i, ret = 0;
100
101 mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
102 if (!mdp)
103 return -ENOMEM;
104
105 mdp->id = pdev->id;
106 mdp->pdev = pdev;
107 INIT_LIST_HEAD(&mdp->ctx_list);
108
109 mutex_init(&mdp->lock);
110 mutex_init(&mdp->vpulock);
111
112 /* Old dts had the components as child nodes */
113 node = of_get_next_child(dev->of_node, NULL);
114 if (node) {
115 of_node_put(node);
116 parent = dev->of_node;
117 dev_warn(dev, "device tree is out of date\n");
118 } else {
119 parent = dev->of_node->parent;
120 }
121
122 /* Iterate over sibling MDP function blocks */
123 for_each_child_of_node(parent, node) {
124 const struct of_device_id *of_id;
125 enum mtk_mdp_comp_type comp_type;
126 int comp_id;
127 struct mtk_mdp_comp *comp;
128
129 of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
130 if (!of_id)
131 continue;
132
133 if (!of_device_is_available(node)) {
134 dev_err(dev, "Skipping disabled component %pOF\n",
135 node);
136 continue;
137 }
138
139 comp_type = (enum mtk_mdp_comp_type)of_id->data;
140 comp_id = mtk_mdp_comp_get_id(dev, node, comp_type);
141 if (comp_id < 0) {
142 dev_warn(dev, "Skipping unknown component %pOF\n",
143 node);
144 continue;
145 }
146
147 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
148 if (!comp) {
149 ret = -ENOMEM;
150 of_node_put(node);
151 goto err_comp;
152 }
153 mdp->comp[comp_id] = comp;
154
155 ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
156 if (ret) {
157 of_node_put(node);
158 goto err_comp;
159 }
160 }
161
162 mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
163 if (!mdp->job_wq) {
164 dev_err(&pdev->dev, "unable to alloc job workqueue\n");
165 ret = -ENOMEM;
166 goto err_alloc_job_wq;
167 }
168
169 mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
170 if (!mdp->wdt_wq) {
171 dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
172 ret = -ENOMEM;
173 goto err_alloc_wdt_wq;
174 }
175 INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);
176
177 ret = v4l2_device_register(dev, &mdp->v4l2_dev);
178 if (ret) {
179 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
180 ret = -EINVAL;
181 goto err_dev_register;
182 }
183
184 ret = mtk_mdp_register_m2m_device(mdp);
185 if (ret) {
186 v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
187 goto err_m2m_register;
188 }
189
190 mdp->vpu_dev = vpu_get_plat_device(pdev);
191 vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
192 VPU_RST_MDP);
193
194 platform_set_drvdata(pdev, mdp);
195
196 vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
197
198 pm_runtime_enable(dev);
199 dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
200
201 return 0;
202
203 err_m2m_register:
204 v4l2_device_unregister(&mdp->v4l2_dev);
205
206 err_dev_register:
207 destroy_workqueue(mdp->wdt_wq);
208
209 err_alloc_wdt_wq:
210 destroy_workqueue(mdp->job_wq);
211
212 err_alloc_job_wq:
213
214 err_comp:
215 for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
216 mtk_mdp_comp_deinit(dev, mdp->comp[i]);
217
218 dev_dbg(dev, "err %d\n", ret);
219 return ret;
220 }
221
mtk_mdp_remove(struct platform_device * pdev)222 static int mtk_mdp_remove(struct platform_device *pdev)
223 {
224 struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
225 int i;
226
227 pm_runtime_disable(&pdev->dev);
228 vb2_dma_contig_clear_max_seg_size(&pdev->dev);
229 mtk_mdp_unregister_m2m_device(mdp);
230 v4l2_device_unregister(&mdp->v4l2_dev);
231
232 flush_workqueue(mdp->job_wq);
233 destroy_workqueue(mdp->job_wq);
234
235 for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
236 mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);
237
238 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
239 return 0;
240 }
241
mtk_mdp_pm_suspend(struct device * dev)242 static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
243 {
244 struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
245
246 mtk_mdp_clock_off(mdp);
247
248 return 0;
249 }
250
mtk_mdp_pm_resume(struct device * dev)251 static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
252 {
253 struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
254
255 mtk_mdp_clock_on(mdp);
256
257 return 0;
258 }
259
mtk_mdp_suspend(struct device * dev)260 static int __maybe_unused mtk_mdp_suspend(struct device *dev)
261 {
262 if (pm_runtime_suspended(dev))
263 return 0;
264
265 return mtk_mdp_pm_suspend(dev);
266 }
267
mtk_mdp_resume(struct device * dev)268 static int __maybe_unused mtk_mdp_resume(struct device *dev)
269 {
270 if (pm_runtime_suspended(dev))
271 return 0;
272
273 return mtk_mdp_pm_resume(dev);
274 }
275
276 static const struct dev_pm_ops mtk_mdp_pm_ops = {
277 SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
278 SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
279 };
280
281 static struct platform_driver mtk_mdp_driver = {
282 .probe = mtk_mdp_probe,
283 .remove = mtk_mdp_remove,
284 .driver = {
285 .name = MTK_MDP_MODULE_NAME,
286 .pm = &mtk_mdp_pm_ops,
287 .of_match_table = mtk_mdp_of_ids,
288 }
289 };
290
291 module_platform_driver(mtk_mdp_driver);
292
293 MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
294 MODULE_DESCRIPTION("Mediatek image processor driver");
295 MODULE_LICENSE("GPL v2");
296
