1 /*
2 * Copyright (c) 2016 MediaTek Inc.
3 * Author: PC Chen <pc.chen@mediatek.com>
4 * Tiffany Lin <tiffany.lin@mediatek.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 #include <linux/slab.h>
17 #include <linux/interrupt.h>
18 #include <linux/irq.h>
19 #include <linux/module.h>
20 #include <linux/of_device.h>
21 #include <linux/of.h>
22 #include <media/v4l2-event.h>
23 #include <media/v4l2-mem2mem.h>
24 #include <media/videobuf2-dma-contig.h>
25
26 #include "mtk_vcodec_drv.h"
27 #include "mtk_vcodec_dec.h"
28 #include "mtk_vcodec_dec_pm.h"
29 #include "mtk_vcodec_intr.h"
30 #include "mtk_vcodec_util.h"
31 #include "mtk_vpu.h"
32
33 #define VDEC_HW_ACTIVE 0x10
34 #define VDEC_IRQ_CFG 0x11
35 #define VDEC_IRQ_CLR 0x10
36 #define VDEC_IRQ_CFG_REG 0xa4
37
38 module_param(mtk_v4l2_dbg_level, int, 0644);
39 module_param(mtk_vcodec_dbg, bool, 0644);
40
41 /* Wake up context wait_queue */
wake_up_ctx(struct mtk_vcodec_ctx * ctx)42 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
43 {
44 ctx->int_cond = 1;
45 wake_up_interruptible(&ctx->queue);
46 }
47
mtk_vcodec_dec_irq_handler(int irq,void * priv)48 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
49 {
50 struct mtk_vcodec_dev *dev = priv;
51 struct mtk_vcodec_ctx *ctx;
52 u32 cg_status = 0;
53 unsigned int dec_done_status = 0;
54 void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
55 VDEC_IRQ_CFG_REG;
56
57 ctx = mtk_vcodec_get_curr_ctx(dev);
58
59 /* check if HW active or not */
60 cg_status = readl(dev->reg_base[0]);
61 if ((cg_status & VDEC_HW_ACTIVE) != 0) {
62 mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
63 cg_status);
64 return IRQ_HANDLED;
65 }
66
67 dec_done_status = readl(vdec_misc_addr);
68 ctx->irq_status = dec_done_status;
69 if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
70 MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
71 return IRQ_HANDLED;
72
73 /* clear interrupt */
74 writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
75 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
76 writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
77 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
78
79 wake_up_ctx(ctx);
80
81 mtk_v4l2_debug(3,
82 "mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
83 ctx->id, dec_done_status);
84
85 return IRQ_HANDLED;
86 }
87
mtk_vcodec_dec_reset_handler(void * priv)88 static void mtk_vcodec_dec_reset_handler(void *priv)
89 {
90 struct mtk_vcodec_dev *dev = priv;
91 struct mtk_vcodec_ctx *ctx;
92
93 mtk_v4l2_err("Watchdog timeout!!");
94
95 mutex_lock(&dev->dev_mutex);
96 list_for_each_entry(ctx, &dev->ctx_list, list) {
97 ctx->state = MTK_STATE_ABORT;
98 mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ERROR",
99 ctx->id);
100 }
101 mutex_unlock(&dev->dev_mutex);
102 }
103
fops_vcodec_open(struct file * file)104 static int fops_vcodec_open(struct file *file)
105 {
106 struct mtk_vcodec_dev *dev = video_drvdata(file);
107 struct mtk_vcodec_ctx *ctx = NULL;
108 struct mtk_video_dec_buf *mtk_buf = NULL;
109 int ret = 0;
110 struct vb2_queue *src_vq;
111
112 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
113 if (!ctx)
114 return -ENOMEM;
115 mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
116 if (!mtk_buf) {
117 kfree(ctx);
118 return -ENOMEM;
119 }
120
121 mutex_lock(&dev->dev_mutex);
122 ctx->empty_flush_buf = mtk_buf;
123 ctx->id = dev->id_counter++;
124 v4l2_fh_init(&ctx->fh, video_devdata(file));
125 file->private_data = &ctx->fh;
126 v4l2_fh_add(&ctx->fh);
127 INIT_LIST_HEAD(&ctx->list);
128 ctx->dev = dev;
129 init_waitqueue_head(&ctx->queue);
130 mutex_init(&ctx->lock);
131
132 ctx->type = MTK_INST_DECODER;
133 ret = mtk_vcodec_dec_ctrls_setup(ctx);
134 if (ret) {
135 mtk_v4l2_err("Failed to setup mt vcodec controls");
136 goto err_ctrls_setup;
137 }
138 ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
139 &mtk_vcodec_dec_queue_init);
140 if (IS_ERR((__force void *)ctx->m2m_ctx)) {
141 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
142 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
143 ret);
144 goto err_m2m_ctx_init;
145 }
146 src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
147 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
148 ctx->empty_flush_buf->vb.vb2_buf.vb2_queue = src_vq;
149 ctx->empty_flush_buf->lastframe = true;
150 mtk_vcodec_dec_set_default_params(ctx);
151
152 if (v4l2_fh_is_singular(&ctx->fh)) {
153 mtk_vcodec_dec_pw_on(&dev->pm);
154 /*
155 * vpu_load_firmware checks if it was loaded already and
156 * does nothing in that case
157 */
158 ret = vpu_load_firmware(dev->vpu_plat_dev);
159 if (ret < 0) {
160 /*
161 * Return 0 if downloading firmware successfully,
162 * otherwise it is failed
163 */
164 mtk_v4l2_err("vpu_load_firmware failed!");
165 goto err_load_fw;
166 }
167
168 dev->dec_capability =
169 vpu_get_vdec_hw_capa(dev->vpu_plat_dev);
170 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
171 }
172
173 list_add(&ctx->list, &dev->ctx_list);
174
175 mutex_unlock(&dev->dev_mutex);
176 mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
177 ctx->id);
178 return ret;
179
180 /* Deinit when failure occurred */
181 err_load_fw:
182 v4l2_m2m_ctx_release(ctx->m2m_ctx);
183 err_m2m_ctx_init:
184 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
185 err_ctrls_setup:
186 v4l2_fh_del(&ctx->fh);
187 v4l2_fh_exit(&ctx->fh);
188 kfree(ctx->empty_flush_buf);
189 kfree(ctx);
190 mutex_unlock(&dev->dev_mutex);
191
192 return ret;
193 }
194
fops_vcodec_release(struct file * file)195 static int fops_vcodec_release(struct file *file)
196 {
197 struct mtk_vcodec_dev *dev = video_drvdata(file);
198 struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
199
200 mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
201 mutex_lock(&dev->dev_mutex);
202
203 /*
204 * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
205 * makes sure the worker thread is not running after vdec_if_deinit.
206 * Second, the decoder will be flushed and all the buffers will be
207 * returned in stop_streaming.
208 */
209 v4l2_m2m_ctx_release(ctx->m2m_ctx);
210 mtk_vcodec_dec_release(ctx);
211
212 if (v4l2_fh_is_singular(&ctx->fh))
213 mtk_vcodec_dec_pw_off(&dev->pm);
214 v4l2_fh_del(&ctx->fh);
215 v4l2_fh_exit(&ctx->fh);
216 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
217
218 list_del_init(&ctx->list);
219 kfree(ctx->empty_flush_buf);
220 kfree(ctx);
221 mutex_unlock(&dev->dev_mutex);
222 return 0;
223 }
224
225 static const struct v4l2_file_operations mtk_vcodec_fops = {
226 .owner = THIS_MODULE,
227 .open = fops_vcodec_open,
228 .release = fops_vcodec_release,
229 .poll = v4l2_m2m_fop_poll,
230 .unlocked_ioctl = video_ioctl2,
231 .mmap = v4l2_m2m_fop_mmap,
232 };
233
mtk_vcodec_probe(struct platform_device * pdev)234 static int mtk_vcodec_probe(struct platform_device *pdev)
235 {
236 struct mtk_vcodec_dev *dev;
237 struct video_device *vfd_dec;
238 struct resource *res;
239 int i, ret;
240
241 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
242 if (!dev)
243 return -ENOMEM;
244
245 INIT_LIST_HEAD(&dev->ctx_list);
246 dev->plat_dev = pdev;
247
248 dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
249 if (dev->vpu_plat_dev == NULL) {
250 mtk_v4l2_err("[VPU] vpu device in not ready");
251 return -EPROBE_DEFER;
252 }
253
254 vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_dec_reset_handler,
255 dev, VPU_RST_DEC);
256
257 ret = mtk_vcodec_init_dec_pm(dev);
258 if (ret < 0) {
259 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
260 return ret;
261 }
262
263 for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
264 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
265 if (res == NULL) {
266 dev_err(&pdev->dev, "get memory resource failed.");
267 ret = -ENXIO;
268 goto err_res;
269 }
270 dev->reg_base[i] = devm_ioremap_resource(&pdev->dev, res);
271 if (IS_ERR((__force void *)dev->reg_base[i])) {
272 ret = PTR_ERR((__force void *)dev->reg_base[i]);
273 goto err_res;
274 }
275 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
276 }
277
278 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
279 if (res == NULL) {
280 dev_err(&pdev->dev, "failed to get irq resource");
281 ret = -ENOENT;
282 goto err_res;
283 }
284
285 dev->dec_irq = platform_get_irq(pdev, 0);
286 ret = devm_request_irq(&pdev->dev, dev->dec_irq,
287 mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
288 if (ret) {
289 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
290 dev->dec_irq,
291 ret);
292 goto err_res;
293 }
294
295 disable_irq(dev->dec_irq);
296 mutex_init(&dev->dec_mutex);
297 mutex_init(&dev->dev_mutex);
298 spin_lock_init(&dev->irqlock);
299
300 snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
301 "[/MTK_V4L2_VDEC]");
302
303 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
304 if (ret) {
305 mtk_v4l2_err("v4l2_device_register err=%d", ret);
306 goto err_res;
307 }
308
309 init_waitqueue_head(&dev->queue);
310
311 vfd_dec = video_device_alloc();
312 if (!vfd_dec) {
313 mtk_v4l2_err("Failed to allocate video device");
314 ret = -ENOMEM;
315 goto err_dec_alloc;
316 }
317 vfd_dec->fops = &mtk_vcodec_fops;
318 vfd_dec->ioctl_ops = &mtk_vdec_ioctl_ops;
319 vfd_dec->release = video_device_release;
320 vfd_dec->lock = &dev->dev_mutex;
321 vfd_dec->v4l2_dev = &dev->v4l2_dev;
322 vfd_dec->vfl_dir = VFL_DIR_M2M;
323 vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
324 V4L2_CAP_STREAMING;
325
326 snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
327 MTK_VCODEC_DEC_NAME);
328 video_set_drvdata(vfd_dec, dev);
329 dev->vfd_dec = vfd_dec;
330 platform_set_drvdata(pdev, dev);
331
332 dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
333 if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
334 mtk_v4l2_err("Failed to init mem2mem dec device");
335 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
336 goto err_dec_mem_init;
337 }
338
339 dev->decode_workqueue =
340 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
341 WQ_MEM_RECLAIM | WQ_FREEZABLE);
342 if (!dev->decode_workqueue) {
343 mtk_v4l2_err("Failed to create decode workqueue");
344 ret = -EINVAL;
345 goto err_event_workq;
346 }
347
348 ret = video_register_device(vfd_dec, VFL_TYPE_GRABBER, 0);
349 if (ret) {
350 mtk_v4l2_err("Failed to register video device");
351 goto err_dec_reg;
352 }
353
354 mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
355 vfd_dec->num);
356
357 return 0;
358
359 err_dec_reg:
360 destroy_workqueue(dev->decode_workqueue);
361 err_event_workq:
362 v4l2_m2m_release(dev->m2m_dev_dec);
363 err_dec_mem_init:
364 video_unregister_device(vfd_dec);
365 err_dec_alloc:
366 v4l2_device_unregister(&dev->v4l2_dev);
367 err_res:
368 mtk_vcodec_release_dec_pm(dev);
369 return ret;
370 }
371
372 static const struct of_device_id mtk_vcodec_match[] = {
373 {.compatible = "mediatek,mt8173-vcodec-dec",},
374 {},
375 };
376
377 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
378
mtk_vcodec_dec_remove(struct platform_device * pdev)379 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
380 {
381 struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
382
383 flush_workqueue(dev->decode_workqueue);
384 destroy_workqueue(dev->decode_workqueue);
385 if (dev->m2m_dev_dec)
386 v4l2_m2m_release(dev->m2m_dev_dec);
387
388 if (dev->vfd_dec)
389 video_unregister_device(dev->vfd_dec);
390
391 v4l2_device_unregister(&dev->v4l2_dev);
392 mtk_vcodec_release_dec_pm(dev);
393 return 0;
394 }
395
396 static struct platform_driver mtk_vcodec_dec_driver = {
397 .probe = mtk_vcodec_probe,
398 .remove = mtk_vcodec_dec_remove,
399 .driver = {
400 .name = MTK_VCODEC_DEC_NAME,
401 .of_match_table = mtk_vcodec_match,
402 },
403 };
404
405 module_platform_driver(mtk_vcodec_dec_driver);
406
407 MODULE_LICENSE("GPL v2");
408 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");
409
