1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2022 MediaTek Inc.
4 * Author: Ping-Hsun Wu <ping-hsun.wu@mediatek.com>
5 */
6
7#include <linux/clk.h>
8#include <linux/module.h>
9#include <linux/of_platform.h>
10#include <linux/platform_device.h>
11#include <linux/pm_runtime.h>
12#include <linux/remoteproc.h>
13#include <linux/remoteproc/mtk_scp.h>
14#include <media/videobuf2-dma-contig.h>
15
16#include "mtk-mdp3-core.h"
17#include "mtk-mdp3-cfg.h"
18#include "mtk-mdp3-m2m.h"
19
20static const struct of_device_id mdp_of_ids[] = {
21	{ .compatible = "mediatek,mt8183-mdp3-rdma",
22	  .data = &mt8183_mdp_driver_data,
23	},
24	{ .compatible = "mediatek,mt8195-mdp3-rdma",
25	  .data = &mt8195_mdp_driver_data,
26	},
27	{ .compatible = "mediatek,mt8195-mdp3-wrot",
28	  .data = &mt8195_mdp_driver_data,
29	},
30	{},
31};
32MODULE_DEVICE_TABLE(of, mdp_of_ids);
33
34static struct platform_device *__get_pdev_by_id(struct platform_device *pdev,
35						struct platform_device *from,
36						enum mdp_infra_id id)
37{
38	struct device_node *node, *f = NULL;
39	struct platform_device *mdp_pdev = NULL;
40	const struct mtk_mdp_driver_data *mdp_data;
41	const char *compat;
42
43	if (!pdev)
44		return NULL;
45
46	if (id < MDP_INFRA_MMSYS || id >= MDP_INFRA_MAX) {
47		dev_err(&pdev->dev, "Illegal infra id %d\n", id);
48		return NULL;
49	}
50
51	mdp_data = of_device_get_match_data(&pdev->dev);
52	if (!mdp_data) {
53		dev_err(&pdev->dev, "have no driver data to find node\n");
54		return NULL;
55	}
56
57	compat = mdp_data->mdp_probe_infra[id].compatible;
58	if (strlen(compat) == 0)
59		return NULL;
60
61	if (from)
62		f = from->dev.of_node;
63	node = of_find_compatible_node(f, NULL, compat);
64	if (WARN_ON(!node)) {
65		dev_err(&pdev->dev, "find node from id %d failed\n", id);
66		return NULL;
67	}
68
69	mdp_pdev = of_find_device_by_node(node);
70	of_node_put(node);
71	if (WARN_ON(!mdp_pdev)) {
72		dev_err(&pdev->dev, "find pdev from id %d failed\n", id);
73		return NULL;
74	}
75
76	return mdp_pdev;
77}
78
79struct platform_device *mdp_get_plat_device(struct platform_device *pdev)
80{
81	struct device *dev = &pdev->dev;
82	struct device_node *mdp_node;
83	struct platform_device *mdp_pdev;
84
85	mdp_node = of_parse_phandle(dev->of_node, MDP_PHANDLE_NAME, 0);
86	if (!mdp_node) {
87		dev_err(dev, "can't get node %s\n", MDP_PHANDLE_NAME);
88		return NULL;
89	}
90
91	mdp_pdev = of_find_device_by_node(mdp_node);
92	of_node_put(mdp_node);
93
94	return mdp_pdev;
95}
96EXPORT_SYMBOL_GPL(mdp_get_plat_device);
97
98int mdp_vpu_get_locked(struct mdp_dev *mdp)
99{
100	int ret = 0;
101
102	if (mdp->vpu_count++ == 0) {
103		ret = rproc_boot(mdp->rproc_handle);
104		if (ret) {
105			dev_err(&mdp->pdev->dev,
106				"vpu_load_firmware failed %d\n", ret);
107			goto err_load_vpu;
108		}
109		ret = mdp_vpu_register(mdp);
110		if (ret) {
111			dev_err(&mdp->pdev->dev,
112				"mdp_vpu register failed %d\n", ret);
113			goto err_reg_vpu;
114		}
115		ret = mdp_vpu_dev_init(&mdp->vpu, mdp->scp, &mdp->vpu_lock);
116		if (ret) {
117			dev_err(&mdp->pdev->dev,
118				"mdp_vpu device init failed %d\n", ret);
119			goto err_init_vpu;
120		}
121	}
122	return 0;
123
124err_init_vpu:
125	mdp_vpu_unregister(mdp);
126err_reg_vpu:
127err_load_vpu:
128	mdp->vpu_count--;
129	return ret;
130}
131
132void mdp_vpu_put_locked(struct mdp_dev *mdp)
133{
134	if (--mdp->vpu_count == 0) {
135		mdp_vpu_dev_deinit(&mdp->vpu);
136		mdp_vpu_unregister(mdp);
137	}
138}
139
140void mdp_video_device_release(struct video_device *vdev)
141{
142	struct mdp_dev *mdp = (struct mdp_dev *)video_get_drvdata(vdev);
143	int i;
144
145	for (i = 0; i < mdp->mdp_data->pp_used; i++)
146		if (mdp->cmdq_clt[i])
147			cmdq_mbox_destroy(mdp->cmdq_clt[i]);
148
149	scp_put(mdp->scp);
150
151	destroy_workqueue(mdp->job_wq);
152	destroy_workqueue(mdp->clock_wq);
153
154	pm_runtime_disable(&mdp->pdev->dev);
155
156	vb2_dma_contig_clear_max_seg_size(&mdp->pdev->dev);
157
158	mdp_comp_destroy(mdp);
159	for (i = 0; i < mdp->mdp_data->pipe_info_len; i++) {
160		enum mdp_mm_subsys_id idx;
161		struct mtk_mutex *m;
162		u32 m_id;
163
164		idx = mdp->mdp_data->pipe_info[i].sub_id;
165		m_id = mdp->mdp_data->pipe_info[i].mutex_id;
166		m = mdp->mm_subsys[idx].mdp_mutex[m_id];
167		if (!IS_ERR_OR_NULL(m))
168			mtk_mutex_put(m);
169	}
170
171	mdp_vpu_shared_mem_free(&mdp->vpu);
172	v4l2_m2m_release(mdp->m2m_dev);
173	kfree(mdp);
174}
175
176static int mdp_mm_subsys_deploy(struct mdp_dev *mdp, enum mdp_infra_id id)
177{
178	struct platform_device *mm_pdev = NULL;
179	struct device **dev;
180	int i;
181
182	if (!mdp)
183		return -EINVAL;
184
185	for (i = 0; i < MDP_MM_SUBSYS_MAX; i++) {
186		const char *compat;
187		enum mdp_infra_id sub_id = id + i;
188
189		switch (id) {
190		case MDP_INFRA_MMSYS:
191			dev = &mdp->mm_subsys[i].mmsys;
192			break;
193		case MDP_INFRA_MUTEX:
194			dev = &mdp->mm_subsys[i].mutex;
195			break;
196		default:
197			dev_err(&mdp->pdev->dev, "Unknown infra id %d", id);
198			return -EINVAL;
199		}
200
201		/*
202		 * Not every chip has multiple multimedia subsystems, so
203		 * the config may be null.
204		 */
205		compat = mdp->mdp_data->mdp_probe_infra[sub_id].compatible;
206		if (strlen(compat) == 0)
207			continue;
208
209		mm_pdev = __get_pdev_by_id(mdp->pdev, mm_pdev, sub_id);
210		if (WARN_ON(!mm_pdev))
211			return -ENODEV;
212
213		*dev = &mm_pdev->dev;
214	}
215
216	return 0;
217}
218
219static int mdp_probe(struct platform_device *pdev)
220{
221	struct device *dev = &pdev->dev;
222	struct mdp_dev *mdp;
223	struct platform_device *mm_pdev;
224	struct resource *res;
225	int ret, i, mutex_id;
226
227	mdp = kzalloc(sizeof(*mdp), GFP_KERNEL);
228	if (!mdp) {
229		ret = -ENOMEM;
230		goto err_return;
231	}
232
233	mdp->pdev = pdev;
234	mdp->mdp_data = of_device_get_match_data(&pdev->dev);
235
236	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
237	if (res->start != mdp->mdp_data->mdp_con_res) {
238		platform_set_drvdata(pdev, mdp);
239		goto success_return;
240	}
241
242	ret = mdp_mm_subsys_deploy(mdp, MDP_INFRA_MMSYS);
243	if (ret)
244		goto err_destroy_device;
245
246	ret = mdp_mm_subsys_deploy(mdp, MDP_INFRA_MUTEX);
247	if (ret)
248		goto err_destroy_device;
249
250	for (i = 0; i < mdp->mdp_data->pipe_info_len; i++) {
251		enum mdp_mm_subsys_id idx;
252		struct mtk_mutex **m;
253
254		idx = mdp->mdp_data->pipe_info[i].sub_id;
255		mutex_id = mdp->mdp_data->pipe_info[i].mutex_id;
256		m = &mdp->mm_subsys[idx].mdp_mutex[mutex_id];
257
258		if (!IS_ERR_OR_NULL(*m))
259			continue;
260
261		*m = mtk_mutex_get(mdp->mm_subsys[idx].mutex);
262		if (IS_ERR(*m)) {
263			ret = PTR_ERR(*m);
264			goto err_free_mutex;
265		}
266	}
267
268	ret = mdp_comp_config(mdp);
269	if (ret) {
270		dev_err(dev, "Failed to config mdp components\n");
271		goto err_free_mutex;
272	}
273
274	mdp->job_wq = alloc_workqueue(MDP_MODULE_NAME, WQ_FREEZABLE, 0);
275	if (!mdp->job_wq) {
276		dev_err(dev, "Unable to create job workqueue\n");
277		ret = -ENOMEM;
278		goto err_deinit_comp;
279	}
280
281	mdp->clock_wq = alloc_workqueue(MDP_MODULE_NAME "-clock", WQ_FREEZABLE,
282					0);
283	if (!mdp->clock_wq) {
284		dev_err(dev, "Unable to create clock workqueue\n");
285		ret = -ENOMEM;
286		goto err_destroy_job_wq;
287	}
288
289	mdp->scp = scp_get(pdev);
290	if (!mdp->scp) {
291		mm_pdev = __get_pdev_by_id(pdev, NULL, MDP_INFRA_SCP);
292		if (WARN_ON(!mm_pdev)) {
293			dev_err(&pdev->dev, "Could not get scp device\n");
294			ret = -ENODEV;
295			goto err_destroy_clock_wq;
296		}
297		mdp->scp = platform_get_drvdata(mm_pdev);
298	}
299
300	mdp->rproc_handle = scp_get_rproc(mdp->scp);
301	dev_dbg(&pdev->dev, "MDP rproc_handle: %pK", mdp->rproc_handle);
302
303	mutex_init(&mdp->vpu_lock);
304	mutex_init(&mdp->m2m_lock);
305
306	for (i = 0; i < mdp->mdp_data->pp_used; i++) {
307		mdp->cmdq_clt[i] = cmdq_mbox_create(dev, i);
308		if (IS_ERR(mdp->cmdq_clt[i])) {
309			ret = PTR_ERR(mdp->cmdq_clt[i]);
310			goto err_mbox_destroy;
311		}
312	}
313
314	init_waitqueue_head(&mdp->callback_wq);
315	ida_init(&mdp->mdp_ida);
316	platform_set_drvdata(pdev, mdp);
317
318	vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
319
320	ret = v4l2_device_register(dev, &mdp->v4l2_dev);
321	if (ret) {
322		dev_err(dev, "Failed to register v4l2 device\n");
323		ret = -EINVAL;
324		goto err_mbox_destroy;
325	}
326
327	ret = mdp_m2m_device_register(mdp);
328	if (ret) {
329		v4l2_err(&mdp->v4l2_dev, "Failed to register m2m device\n");
330		goto err_unregister_device;
331	}
332
333success_return:
334	dev_dbg(dev, "mdp-%d registered successfully\n", pdev->id);
335	return 0;
336
337err_unregister_device:
338	v4l2_device_unregister(&mdp->v4l2_dev);
339err_mbox_destroy:
340	while (--i >= 0)
341		cmdq_mbox_destroy(mdp->cmdq_clt[i]);
342	scp_put(mdp->scp);
343err_destroy_clock_wq:
344	destroy_workqueue(mdp->clock_wq);
345err_destroy_job_wq:
346	destroy_workqueue(mdp->job_wq);
347err_deinit_comp:
348	mdp_comp_destroy(mdp);
349err_free_mutex:
350	for (i = 0; i < mdp->mdp_data->pipe_info_len; i++) {
351		enum mdp_mm_subsys_id idx;
352		struct mtk_mutex *m;
353
354		idx = mdp->mdp_data->pipe_info[i].sub_id;
355		mutex_id = mdp->mdp_data->pipe_info[i].mutex_id;
356		m = mdp->mm_subsys[idx].mdp_mutex[mutex_id];
357		if (!IS_ERR_OR_NULL(m))
358			mtk_mutex_put(m);
359	}
360err_destroy_device:
361	kfree(mdp);
362err_return:
363	dev_dbg(dev, "Errno %d\n", ret);
364	return ret;
365}
366
367static void mdp_remove(struct platform_device *pdev)
368{
369	struct mdp_dev *mdp = platform_get_drvdata(pdev);
370
371	v4l2_device_unregister(&mdp->v4l2_dev);
372
373	dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
374}
375
376static int __maybe_unused mdp_suspend(struct device *dev)
377{
378	struct mdp_dev *mdp = dev_get_drvdata(dev);
379	int ret;
380
381	atomic_set(&mdp->suspended, 1);
382
383	if (atomic_read(&mdp->job_count)) {
384		ret = wait_event_timeout(mdp->callback_wq,
385					 !atomic_read(&mdp->job_count),
386					 2 * HZ);
387		if (ret == 0) {
388			dev_err(dev,
389				"%s:flushed cmdq task incomplete, count=%d\n",
390				__func__, atomic_read(&mdp->job_count));
391			return -EBUSY;
392		}
393	}
394
395	return 0;
396}
397
398static int __maybe_unused mdp_resume(struct device *dev)
399{
400	struct mdp_dev *mdp = dev_get_drvdata(dev);
401
402	atomic_set(&mdp->suspended, 0);
403
404	return 0;
405}
406
407static const struct dev_pm_ops mdp_pm_ops = {
408	SET_SYSTEM_SLEEP_PM_OPS(mdp_suspend, mdp_resume)
409};
410
411static struct platform_driver mdp_driver = {
412	.probe		= mdp_probe,
413	.remove_new	= mdp_remove,
414	.driver = {
415		.name	= MDP_MODULE_NAME,
416		.pm	= &mdp_pm_ops,
417		.of_match_table = mdp_of_ids,
418	},
419};
420
421module_platform_driver(mdp_driver);
422
423MODULE_AUTHOR("Ping-Hsun Wu <ping-hsun.wu@mediatek.com>");
424MODULE_DESCRIPTION("MediaTek image processor 3 driver");
425MODULE_LICENSE("GPL");
426