summaryrefslogtreecommitdiff
path: root/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
blob: 944771ee5f5cf430b8fce03c537473f7cbe651c8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2016 MediaTek Inc.
 * Author: PC Chen <pc.chen@mediatek.com>
 *         Tiffany Lin <tiffany.lin@mediatek.com>
 */

#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>

#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
#include "mtk_vcodec_dec_pm.h"
#include "mtk_vcodec_intr.h"
#include "mtk_vcodec_util.h"
#include "mtk_vpu.h"

#define VDEC_HW_ACTIVE	0x10
#define VDEC_IRQ_CFG	0x11
#define VDEC_IRQ_CLR	0x10
#define VDEC_IRQ_CFG_REG	0xa4

module_param(mtk_v4l2_dbg_level, int, 0644);
module_param(mtk_vcodec_dbg, bool, 0644);

/* Wake up context wait_queue */
static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
{
	ctx->int_cond = 1;
	wake_up_interruptible(&ctx->queue);
}

static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
{
	struct mtk_vcodec_dev *dev = priv;
	struct mtk_vcodec_ctx *ctx;
	u32 cg_status = 0;
	unsigned int dec_done_status = 0;
	void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
					VDEC_IRQ_CFG_REG;

	ctx = mtk_vcodec_get_curr_ctx(dev);

	/* check if HW active or not */
	cg_status = readl(dev->reg_base[0]);
	if ((cg_status & VDEC_HW_ACTIVE) != 0) {
		mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
			     cg_status);
		return IRQ_HANDLED;
	}

	dec_done_status = readl(vdec_misc_addr);
	ctx->irq_status = dec_done_status;
	if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
		MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
		return IRQ_HANDLED;

	/* clear interrupt */
	writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
		dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
	writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
		dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);

	wake_up_ctx(ctx);

	mtk_v4l2_debug(3,
			"mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
			ctx->id, dec_done_status);

	return IRQ_HANDLED;
}

static void mtk_vcodec_dec_reset_handler(void *priv)
{
	struct mtk_vcodec_dev *dev = priv;
	struct mtk_vcodec_ctx *ctx;

	mtk_v4l2_err("Watchdog timeout!!");

	mutex_lock(&dev->dev_mutex);
	list_for_each_entry(ctx, &dev->ctx_list, list) {
		ctx->state = MTK_STATE_ABORT;
		mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ERROR",
				ctx->id);
	}
	mutex_unlock(&dev->dev_mutex);
}

static int fops_vcodec_open(struct file *file)
{
	struct mtk_vcodec_dev *dev = video_drvdata(file);
	struct mtk_vcodec_ctx *ctx = NULL;
	struct mtk_video_dec_buf *mtk_buf = NULL;
	int ret = 0;
	struct vb2_queue *src_vq;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;
	mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
	if (!mtk_buf) {
		kfree(ctx);
		return -ENOMEM;
	}

	mutex_lock(&dev->dev_mutex);
	ctx->empty_flush_buf = mtk_buf;
	ctx->id = dev->id_counter++;
	v4l2_fh_init(&ctx->fh, video_devdata(file));
	file->private_data = &ctx->fh;
	v4l2_fh_add(&ctx->fh);
	INIT_LIST_HEAD(&ctx->list);
	ctx->dev = dev;
	init_waitqueue_head(&ctx->queue);
	mutex_init(&ctx->lock);

	ctx->type = MTK_INST_DECODER;
	ret = mtk_vcodec_dec_ctrls_setup(ctx);
	if (ret) {
		mtk_v4l2_err("Failed to setup mt vcodec controls");
		goto err_ctrls_setup;
	}
	ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
		&mtk_vcodec_dec_queue_init);
	if (IS_ERR((__force void *)ctx->m2m_ctx)) {
		ret = PTR_ERR((__force void *)ctx->m2m_ctx);
		mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
			ret);
		goto err_m2m_ctx_init;
	}
	src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
				V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
	ctx->empty_flush_buf->vb.vb2_buf.vb2_queue = src_vq;
	ctx->empty_flush_buf->lastframe = true;
	mtk_vcodec_dec_set_default_params(ctx);

	if (v4l2_fh_is_singular(&ctx->fh)) {
		mtk_vcodec_dec_pw_on(&dev->pm);
		/*
		 * vpu_load_firmware checks if it was loaded already and
		 * does nothing in that case
		 */
		ret = vpu_load_firmware(dev->vpu_plat_dev);
		if (ret < 0) {
			/*
			 * Return 0 if downloading firmware successfully,
			 * otherwise it is failed
			 */
			mtk_v4l2_err("vpu_load_firmware failed!");
			goto err_load_fw;
		}

		dev->dec_capability =
			vpu_get_vdec_hw_capa(dev->vpu_plat_dev);
		mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
	}

	list_add(&ctx->list, &dev->ctx_list);

	mutex_unlock(&dev->dev_mutex);
	mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
			ctx->id);
	return ret;

	/* Deinit when failure occurred */
err_load_fw:
	v4l2_m2m_ctx_release(ctx->m2m_ctx);
err_m2m_ctx_init:
	v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
err_ctrls_setup:
	v4l2_fh_del(&ctx->fh);
	v4l2_fh_exit(&ctx->fh);
	kfree(ctx->empty_flush_buf);
	kfree(ctx);
	mutex_unlock(&dev->dev_mutex);

	return ret;
}

static int fops_vcodec_release(struct file *file)
{
	struct mtk_vcodec_dev *dev = video_drvdata(file);
	struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);

	mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
	mutex_lock(&dev->dev_mutex);

	/*
	 * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
	 * makes sure the worker thread is not running after vdec_if_deinit.
	 * Second, the decoder will be flushed and all the buffers will be
	 * returned in stop_streaming.
	 */
	v4l2_m2m_ctx_release(ctx->m2m_ctx);
	mtk_vcodec_dec_release(ctx);

	if (v4l2_fh_is_singular(&ctx->fh))
		mtk_vcodec_dec_pw_off(&dev->pm);
	v4l2_fh_del(&ctx->fh);
	v4l2_fh_exit(&ctx->fh);
	v4l2_ctrl_handler_free(&ctx->ctrl_hdl);

	list_del_init(&ctx->list);
	kfree(ctx->empty_flush_buf);
	kfree(ctx);
	mutex_unlock(&dev->dev_mutex);
	return 0;
}

static const struct v4l2_file_operations mtk_vcodec_fops = {
	.owner		= THIS_MODULE,
	.open		= fops_vcodec_open,
	.release	= fops_vcodec_release,
	.poll		= v4l2_m2m_fop_poll,
	.unlocked_ioctl	= video_ioctl2,
	.mmap		= v4l2_m2m_fop_mmap,
};

static int mtk_vcodec_probe(struct platform_device *pdev)
{
	struct mtk_vcodec_dev *dev;
	struct video_device *vfd_dec;
	struct resource *res;
	int i, ret;

	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	INIT_LIST_HEAD(&dev->ctx_list);
	dev->plat_dev = pdev;

	dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
	if (dev->vpu_plat_dev == NULL) {
		mtk_v4l2_err("[VPU] vpu device in not ready");
		return -EPROBE_DEFER;
	}

	vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_dec_reset_handler,
			dev, VPU_RST_DEC);

	ret = mtk_vcodec_init_dec_pm(dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
		return ret;
	}

	for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
		dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
		if (IS_ERR((__force void *)dev->reg_base[i])) {
			ret = PTR_ERR((__force void *)dev->reg_base[i]);
			goto err_res;
		}
		mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
	}

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to get irq resource");
		ret = -ENOENT;
		goto err_res;
	}

	dev->dec_irq = platform_get_irq(pdev, 0);
	ret = devm_request_irq(&pdev->dev, dev->dec_irq,
			mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
	if (ret) {
		dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
			dev->dec_irq,
			ret);
		goto err_res;
	}

	disable_irq(dev->dec_irq);
	mutex_init(&dev->dec_mutex);
	mutex_init(&dev->dev_mutex);
	spin_lock_init(&dev->irqlock);

	snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
		"[/MTK_V4L2_VDEC]");

	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
	if (ret) {
		mtk_v4l2_err("v4l2_device_register err=%d", ret);
		goto err_res;
	}

	init_waitqueue_head(&dev->queue);

	vfd_dec = video_device_alloc();
	if (!vfd_dec) {
		mtk_v4l2_err("Failed to allocate video device");
		ret = -ENOMEM;
		goto err_dec_alloc;
	}
	vfd_dec->fops		= &mtk_vcodec_fops;
	vfd_dec->ioctl_ops	= &mtk_vdec_ioctl_ops;
	vfd_dec->release	= video_device_release;
	vfd_dec->lock		= &dev->dev_mutex;
	vfd_dec->v4l2_dev	= &dev->v4l2_dev;
	vfd_dec->vfl_dir	= VFL_DIR_M2M;
	vfd_dec->device_caps	= V4L2_CAP_VIDEO_M2M_MPLANE |
			V4L2_CAP_STREAMING;

	snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
		MTK_VCODEC_DEC_NAME);
	video_set_drvdata(vfd_dec, dev);
	dev->vfd_dec = vfd_dec;
	platform_set_drvdata(pdev, dev);

	dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
	if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
		mtk_v4l2_err("Failed to init mem2mem dec device");
		ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
		goto err_dec_mem_init;
	}

	dev->decode_workqueue =
		alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
			WQ_MEM_RECLAIM | WQ_FREEZABLE);
	if (!dev->decode_workqueue) {
		mtk_v4l2_err("Failed to create decode workqueue");
		ret = -EINVAL;
		goto err_event_workq;
	}

	ret = video_register_device(vfd_dec, VFL_TYPE_GRABBER, 0);
	if (ret) {
		mtk_v4l2_err("Failed to register video device");
		goto err_dec_reg;
	}

	mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
		vfd_dec->num);

	return 0;

err_dec_reg:
	destroy_workqueue(dev->decode_workqueue);
err_event_workq:
	v4l2_m2m_release(dev->m2m_dev_dec);
err_dec_mem_init:
	video_unregister_device(vfd_dec);
err_dec_alloc:
	v4l2_device_unregister(&dev->v4l2_dev);
err_res:
	mtk_vcodec_release_dec_pm(dev);
	return ret;
}

static const struct of_device_id mtk_vcodec_match[] = {
	{.compatible = "mediatek,mt8173-vcodec-dec",},
	{},
};

MODULE_DEVICE_TABLE(of, mtk_vcodec_match);

static int mtk_vcodec_dec_remove(struct platform_device *pdev)
{
	struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);

	flush_workqueue(dev->decode_workqueue);
	destroy_workqueue(dev->decode_workqueue);
	if (dev->m2m_dev_dec)
		v4l2_m2m_release(dev->m2m_dev_dec);

	if (dev->vfd_dec)
		video_unregister_device(dev->vfd_dec);

	v4l2_device_unregister(&dev->v4l2_dev);
	mtk_vcodec_release_dec_pm(dev);
	return 0;
}

static struct platform_driver mtk_vcodec_dec_driver = {
	.probe	= mtk_vcodec_probe,
	.remove	= mtk_vcodec_dec_remove,
	.driver	= {
		.name	= MTK_VCODEC_DEC_NAME,
		.of_match_table = mtk_vcodec_match,
	},
};

module_platform_driver(mtk_vcodec_dec_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");