1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: PC Chen <pc.chen@mediatek.com>
5 * Tiffany Lin <tiffany.lin@mediatek.com>
6 */
7
8 #include <linux/slab.h>
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include <linux/of.h>
14 #include <media/v4l2-event.h>
15 #include <media/v4l2-mem2mem.h>
16 #include <media/videobuf2-dma-contig.h>
17
18 #include "mtk_vcodec_drv.h"
19 #include "mtk_vcodec_dec.h"
20 #include "mtk_vcodec_dec_pm.h"
21 #include "mtk_vcodec_intr.h"
22 #include "mtk_vcodec_util.h"
23 #include "mtk_vcodec_fw.h"
24
25 #define VDEC_HW_ACTIVE 0x10
26 #define VDEC_IRQ_CFG 0x11
27 #define VDEC_IRQ_CLR 0x10
28 #define VDEC_IRQ_CFG_REG 0xa4
29
30 module_param(mtk_v4l2_dbg_level, int, 0644);
31 module_param(mtk_vcodec_dbg, bool, 0644);
32
33 /* Wake up context wait_queue */
wake_up_ctx(struct mtk_vcodec_ctx * ctx)34 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
35 {
36 ctx->int_cond = 1;
37 wake_up_interruptible(&ctx->queue);
38 }
39
mtk_vcodec_dec_irq_handler(int irq,void * priv)40 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
41 {
42 struct mtk_vcodec_dev *dev = priv;
43 struct mtk_vcodec_ctx *ctx;
44 u32 cg_status = 0;
45 unsigned int dec_done_status = 0;
46 void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
47 VDEC_IRQ_CFG_REG;
48
49 ctx = mtk_vcodec_get_curr_ctx(dev);
50
51 /* check if HW active or not */
52 cg_status = readl(dev->reg_base[0]);
53 if ((cg_status & VDEC_HW_ACTIVE) != 0) {
54 mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
55 cg_status);
56 return IRQ_HANDLED;
57 }
58
59 dec_done_status = readl(vdec_misc_addr);
60 ctx->irq_status = dec_done_status;
61 if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
62 MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
63 return IRQ_HANDLED;
64
65 /* clear interrupt */
66 writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
67 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
68 writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
69 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
70
71 wake_up_ctx(ctx);
72
73 mtk_v4l2_debug(3,
74 "mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
75 ctx->id, dec_done_status);
76
77 return IRQ_HANDLED;
78 }
79
fops_vcodec_open(struct file * file)80 static int fops_vcodec_open(struct file *file)
81 {
82 struct mtk_vcodec_dev *dev = video_drvdata(file);
83 struct mtk_vcodec_ctx *ctx = NULL;
84 struct mtk_video_dec_buf *mtk_buf = NULL;
85 int ret = 0;
86 struct vb2_queue *src_vq;
87
88 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
89 if (!ctx)
90 return -ENOMEM;
91 mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
92 if (!mtk_buf) {
93 kfree(ctx);
94 return -ENOMEM;
95 }
96
97 mutex_lock(&dev->dev_mutex);
98 ctx->empty_flush_buf = mtk_buf;
99 ctx->id = dev->id_counter++;
100 v4l2_fh_init(&ctx->fh, video_devdata(file));
101 file->private_data = &ctx->fh;
102 v4l2_fh_add(&ctx->fh);
103 INIT_LIST_HEAD(&ctx->list);
104 ctx->dev = dev;
105 init_waitqueue_head(&ctx->queue);
106 mutex_init(&ctx->lock);
107
108 ctx->type = MTK_INST_DECODER;
109 ret = mtk_vcodec_dec_ctrls_setup(ctx);
110 if (ret) {
111 mtk_v4l2_err("Failed to setup mt vcodec controls");
112 goto err_ctrls_setup;
113 }
114 ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
115 &mtk_vcodec_dec_queue_init);
116 if (IS_ERR((__force void *)ctx->m2m_ctx)) {
117 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
118 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
119 ret);
120 goto err_m2m_ctx_init;
121 }
122 src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
123 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
124 ctx->empty_flush_buf->m2m_buf.vb.vb2_buf.vb2_queue = src_vq;
125 ctx->empty_flush_buf->lastframe = true;
126 mtk_vcodec_dec_set_default_params(ctx);
127
128 if (v4l2_fh_is_singular(&ctx->fh)) {
129 ret = mtk_vcodec_dec_pw_on(&dev->pm);
130 if (ret < 0)
131 goto err_load_fw;
132 /*
133 * Does nothing if firmware was already loaded.
134 */
135 ret = mtk_vcodec_fw_load_firmware(dev->fw_handler);
136 if (ret < 0) {
137 /*
138 * Return 0 if downloading firmware successfully,
139 * otherwise it is failed
140 */
141 mtk_v4l2_err("failed to load firmware!");
142 goto err_load_fw;
143 }
144
145 dev->dec_capability =
146 mtk_vcodec_fw_get_vdec_capa(dev->fw_handler);
147 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
148 }
149
150 list_add(&ctx->list, &dev->ctx_list);
151
152 mutex_unlock(&dev->dev_mutex);
153 mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
154 ctx->id);
155 return ret;
156
157 /* Deinit when failure occurred */
158 err_load_fw:
159 v4l2_m2m_ctx_release(ctx->m2m_ctx);
160 err_m2m_ctx_init:
161 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
162 err_ctrls_setup:
163 v4l2_fh_del(&ctx->fh);
164 v4l2_fh_exit(&ctx->fh);
165 kfree(ctx->empty_flush_buf);
166 kfree(ctx);
167 mutex_unlock(&dev->dev_mutex);
168
169 return ret;
170 }
171
fops_vcodec_release(struct file * file)172 static int fops_vcodec_release(struct file *file)
173 {
174 struct mtk_vcodec_dev *dev = video_drvdata(file);
175 struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
176
177 mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
178 mutex_lock(&dev->dev_mutex);
179
180 /*
181 * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
182 * makes sure the worker thread is not running after vdec_if_deinit.
183 * Second, the decoder will be flushed and all the buffers will be
184 * returned in stop_streaming.
185 */
186 v4l2_m2m_ctx_release(ctx->m2m_ctx);
187 mtk_vcodec_dec_release(ctx);
188
189 if (v4l2_fh_is_singular(&ctx->fh))
190 mtk_vcodec_dec_pw_off(&dev->pm);
191 v4l2_fh_del(&ctx->fh);
192 v4l2_fh_exit(&ctx->fh);
193 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
194
195 list_del_init(&ctx->list);
196 kfree(ctx->empty_flush_buf);
197 kfree(ctx);
198 mutex_unlock(&dev->dev_mutex);
199 return 0;
200 }
201
202 static const struct v4l2_file_operations mtk_vcodec_fops = {
203 .owner = THIS_MODULE,
204 .open = fops_vcodec_open,
205 .release = fops_vcodec_release,
206 .poll = v4l2_m2m_fop_poll,
207 .unlocked_ioctl = video_ioctl2,
208 .mmap = v4l2_m2m_fop_mmap,
209 };
210
mtk_vcodec_probe(struct platform_device * pdev)211 static int mtk_vcodec_probe(struct platform_device *pdev)
212 {
213 struct mtk_vcodec_dev *dev;
214 struct video_device *vfd_dec;
215 struct resource *res;
216 phandle rproc_phandle;
217 enum mtk_vcodec_fw_type fw_type;
218 int i, ret;
219
220 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
221 if (!dev)
222 return -ENOMEM;
223
224 INIT_LIST_HEAD(&dev->ctx_list);
225 dev->plat_dev = pdev;
226
227 if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
228 &rproc_phandle)) {
229 fw_type = VPU;
230 } else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
231 &rproc_phandle)) {
232 fw_type = SCP;
233 } else {
234 mtk_v4l2_err("Could not get vdec IPI device");
235 return -ENODEV;
236 }
237 if (!pdev->dev.dma_parms) {
238 pdev->dev.dma_parms = devm_kzalloc(&pdev->dev,
239 sizeof(*pdev->dev.dma_parms),
240 GFP_KERNEL);
241 if (!pdev->dev.dma_parms)
242 return -ENOMEM;
243 }
244 dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
245
246 dev->fw_handler = mtk_vcodec_fw_select(dev, fw_type, DECODER);
247 if (IS_ERR(dev->fw_handler))
248 return PTR_ERR(dev->fw_handler);
249
250 ret = mtk_vcodec_init_dec_pm(dev);
251 if (ret < 0) {
252 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
253 goto err_dec_pm;
254 }
255
256 for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
257 dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
258 if (IS_ERR((__force void *)dev->reg_base[i])) {
259 ret = PTR_ERR((__force void *)dev->reg_base[i]);
260 goto err_res;
261 }
262 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
263 }
264
265 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
266 if (res == NULL) {
267 dev_err(&pdev->dev, "failed to get irq resource");
268 ret = -ENOENT;
269 goto err_res;
270 }
271
272 dev->dec_irq = platform_get_irq(pdev, 0);
273 irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
274 ret = devm_request_irq(&pdev->dev, dev->dec_irq,
275 mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
276 if (ret) {
277 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
278 dev->dec_irq,
279 ret);
280 goto err_res;
281 }
282
283 mutex_init(&dev->dec_mutex);
284 mutex_init(&dev->dev_mutex);
285 spin_lock_init(&dev->irqlock);
286
287 snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
288 "[/MTK_V4L2_VDEC]");
289
290 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
291 if (ret) {
292 mtk_v4l2_err("v4l2_device_register err=%d", ret);
293 goto err_res;
294 }
295
296 init_waitqueue_head(&dev->queue);
297
298 vfd_dec = video_device_alloc();
299 if (!vfd_dec) {
300 mtk_v4l2_err("Failed to allocate video device");
301 ret = -ENOMEM;
302 goto err_dec_alloc;
303 }
304 vfd_dec->fops = &mtk_vcodec_fops;
305 vfd_dec->ioctl_ops = &mtk_vdec_ioctl_ops;
306 vfd_dec->release = video_device_release;
307 vfd_dec->lock = &dev->dev_mutex;
308 vfd_dec->v4l2_dev = &dev->v4l2_dev;
309 vfd_dec->vfl_dir = VFL_DIR_M2M;
310 vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
311 V4L2_CAP_STREAMING;
312
313 snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
314 MTK_VCODEC_DEC_NAME);
315 video_set_drvdata(vfd_dec, dev);
316 dev->vfd_dec = vfd_dec;
317 platform_set_drvdata(pdev, dev);
318
319 dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
320 if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
321 mtk_v4l2_err("Failed to init mem2mem dec device");
322 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
323 goto err_dec_mem_init;
324 }
325
326 dev->decode_workqueue =
327 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
328 WQ_MEM_RECLAIM | WQ_FREEZABLE);
329 if (!dev->decode_workqueue) {
330 mtk_v4l2_err("Failed to create decode workqueue");
331 ret = -EINVAL;
332 goto err_event_workq;
333 }
334
335 ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, 0);
336 if (ret) {
337 mtk_v4l2_err("Failed to register video device");
338 goto err_dec_reg;
339 }
340
341 mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
342 vfd_dec->num);
343
344 return 0;
345
346 err_dec_reg:
347 destroy_workqueue(dev->decode_workqueue);
348 err_event_workq:
349 v4l2_m2m_release(dev->m2m_dev_dec);
350 err_dec_mem_init:
351 video_unregister_device(vfd_dec);
352 err_dec_alloc:
353 v4l2_device_unregister(&dev->v4l2_dev);
354 err_res:
355 mtk_vcodec_release_dec_pm(dev);
356 err_dec_pm:
357 mtk_vcodec_fw_release(dev->fw_handler);
358 return ret;
359 }
360
361 static const struct of_device_id mtk_vcodec_match[] = {
362 {.compatible = "mediatek,mt8173-vcodec-dec",},
363 {},
364 };
365
366 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
367
mtk_vcodec_dec_remove(struct platform_device * pdev)368 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
369 {
370 struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
371
372 flush_workqueue(dev->decode_workqueue);
373 destroy_workqueue(dev->decode_workqueue);
374 if (dev->m2m_dev_dec)
375 v4l2_m2m_release(dev->m2m_dev_dec);
376
377 if (dev->vfd_dec)
378 video_unregister_device(dev->vfd_dec);
379
380 v4l2_device_unregister(&dev->v4l2_dev);
381 mtk_vcodec_release_dec_pm(dev);
382 mtk_vcodec_fw_release(dev->fw_handler);
383 return 0;
384 }
385
386 static struct platform_driver mtk_vcodec_dec_driver = {
387 .probe = mtk_vcodec_probe,
388 .remove = mtk_vcodec_dec_remove,
389 .driver = {
390 .name = MTK_VCODEC_DEC_NAME,
391 .of_match_table = mtk_vcodec_match,
392 },
393 };
394
395 module_platform_driver(mtk_vcodec_dec_driver);
396
397 MODULE_LICENSE("GPL v2");
398 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");
399