1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: PC Chen <pc.chen@mediatek.com>
5 * Tiffany Lin <tiffany.lin@mediatek.com>
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>
14 #include <media/v4l2-event.h>
15 #include <media/v4l2-mem2mem.h>
16 #include <media/videobuf2-dma-contig.h>
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"
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
30 module_param(mtk_v4l2_dbg_level, int, 0644);
31 module_param(mtk_vcodec_dbg, bool, 0644);
33 /* Wake up context wait_queue */
34 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
37 wake_up_interruptible(&ctx->queue);
40 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
42 struct mtk_vcodec_dev *dev = priv;
43 struct mtk_vcodec_ctx *ctx;
45 unsigned int dec_done_status = 0;
46 void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
49 ctx = mtk_vcodec_get_curr_ctx(dev);
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)",
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)
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);
74 "mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
75 ctx->id, dec_done_status);
80 static void mtk_vcodec_dec_reset_handler(void *priv)
82 struct mtk_vcodec_dev *dev = priv;
83 struct mtk_vcodec_ctx *ctx;
85 mtk_v4l2_err("Watchdog timeout!!");
87 mutex_lock(&dev->dev_mutex);
88 list_for_each_entry(ctx, &dev->ctx_list, list) {
89 ctx->state = MTK_STATE_ABORT;
90 mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ERROR",
93 mutex_unlock(&dev->dev_mutex);
96 static int fops_vcodec_open(struct file *file)
98 struct mtk_vcodec_dev *dev = video_drvdata(file);
99 struct mtk_vcodec_ctx *ctx = NULL;
100 struct mtk_video_dec_buf *mtk_buf = NULL;
102 struct vb2_queue *src_vq;
104 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
107 mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
113 mutex_lock(&dev->dev_mutex);
114 ctx->empty_flush_buf = mtk_buf;
115 ctx->id = dev->id_counter++;
116 v4l2_fh_init(&ctx->fh, video_devdata(file));
117 file->private_data = &ctx->fh;
118 v4l2_fh_add(&ctx->fh);
119 INIT_LIST_HEAD(&ctx->list);
121 init_waitqueue_head(&ctx->queue);
122 mutex_init(&ctx->lock);
124 ctx->type = MTK_INST_DECODER;
125 ret = mtk_vcodec_dec_ctrls_setup(ctx);
127 mtk_v4l2_err("Failed to setup mt vcodec controls");
128 goto err_ctrls_setup;
130 ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
131 &mtk_vcodec_dec_queue_init);
132 if (IS_ERR((__force void *)ctx->m2m_ctx)) {
133 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
134 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
136 goto err_m2m_ctx_init;
138 src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
139 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
140 ctx->empty_flush_buf->m2m_buf.vb.vb2_buf.vb2_queue = src_vq;
141 ctx->empty_flush_buf->lastframe = true;
142 mtk_vcodec_dec_set_default_params(ctx);
144 if (v4l2_fh_is_singular(&ctx->fh)) {
145 mtk_vcodec_dec_pw_on(&dev->pm);
147 * vpu_load_firmware checks if it was loaded already and
148 * does nothing in that case
150 ret = vpu_load_firmware(dev->vpu_plat_dev);
153 * Return 0 if downloading firmware successfully,
154 * otherwise it is failed
156 mtk_v4l2_err("vpu_load_firmware failed!");
160 dev->dec_capability =
161 vpu_get_vdec_hw_capa(dev->vpu_plat_dev);
162 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
165 list_add(&ctx->list, &dev->ctx_list);
167 mutex_unlock(&dev->dev_mutex);
168 mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
172 /* Deinit when failure occurred */
174 v4l2_m2m_ctx_release(ctx->m2m_ctx);
176 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
178 v4l2_fh_del(&ctx->fh);
179 v4l2_fh_exit(&ctx->fh);
180 kfree(ctx->empty_flush_buf);
182 mutex_unlock(&dev->dev_mutex);
187 static int fops_vcodec_release(struct file *file)
189 struct mtk_vcodec_dev *dev = video_drvdata(file);
190 struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
192 mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
193 mutex_lock(&dev->dev_mutex);
196 * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
197 * makes sure the worker thread is not running after vdec_if_deinit.
198 * Second, the decoder will be flushed and all the buffers will be
199 * returned in stop_streaming.
201 v4l2_m2m_ctx_release(ctx->m2m_ctx);
202 mtk_vcodec_dec_release(ctx);
204 if (v4l2_fh_is_singular(&ctx->fh))
205 mtk_vcodec_dec_pw_off(&dev->pm);
206 v4l2_fh_del(&ctx->fh);
207 v4l2_fh_exit(&ctx->fh);
208 v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
210 list_del_init(&ctx->list);
211 kfree(ctx->empty_flush_buf);
213 mutex_unlock(&dev->dev_mutex);
217 static const struct v4l2_file_operations mtk_vcodec_fops = {
218 .owner = THIS_MODULE,
219 .open = fops_vcodec_open,
220 .release = fops_vcodec_release,
221 .poll = v4l2_m2m_fop_poll,
222 .unlocked_ioctl = video_ioctl2,
223 .mmap = v4l2_m2m_fop_mmap,
226 static int mtk_vcodec_probe(struct platform_device *pdev)
228 struct mtk_vcodec_dev *dev;
229 struct video_device *vfd_dec;
230 struct resource *res;
233 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
237 INIT_LIST_HEAD(&dev->ctx_list);
238 dev->plat_dev = pdev;
240 dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
241 if (dev->vpu_plat_dev == NULL) {
242 mtk_v4l2_err("[VPU] vpu device in not ready");
243 return -EPROBE_DEFER;
246 vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_dec_reset_handler,
249 ret = mtk_vcodec_init_dec_pm(dev);
251 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
255 for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
256 dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
257 if (IS_ERR((__force void *)dev->reg_base[i])) {
258 ret = PTR_ERR((__force void *)dev->reg_base[i]);
261 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
264 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
266 dev_err(&pdev->dev, "failed to get irq resource");
271 dev->dec_irq = platform_get_irq(pdev, 0);
272 ret = devm_request_irq(&pdev->dev, dev->dec_irq,
273 mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
275 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
281 disable_irq(dev->dec_irq);
282 mutex_init(&dev->dec_mutex);
283 mutex_init(&dev->dev_mutex);
284 spin_lock_init(&dev->irqlock);
286 snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
289 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
291 mtk_v4l2_err("v4l2_device_register err=%d", ret);
295 init_waitqueue_head(&dev->queue);
297 vfd_dec = video_device_alloc();
299 mtk_v4l2_err("Failed to allocate video device");
303 vfd_dec->fops = &mtk_vcodec_fops;
304 vfd_dec->ioctl_ops = &mtk_vdec_ioctl_ops;
305 vfd_dec->release = video_device_release;
306 vfd_dec->lock = &dev->dev_mutex;
307 vfd_dec->v4l2_dev = &dev->v4l2_dev;
308 vfd_dec->vfl_dir = VFL_DIR_M2M;
309 vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
312 snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
313 MTK_VCODEC_DEC_NAME);
314 video_set_drvdata(vfd_dec, dev);
315 dev->vfd_dec = vfd_dec;
316 platform_set_drvdata(pdev, dev);
318 dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
319 if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
320 mtk_v4l2_err("Failed to init mem2mem dec device");
321 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
322 goto err_dec_mem_init;
325 dev->decode_workqueue =
326 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
327 WQ_MEM_RECLAIM | WQ_FREEZABLE);
328 if (!dev->decode_workqueue) {
329 mtk_v4l2_err("Failed to create decode workqueue");
331 goto err_event_workq;
334 ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, 0);
336 mtk_v4l2_err("Failed to register video device");
340 mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
346 destroy_workqueue(dev->decode_workqueue);
348 v4l2_m2m_release(dev->m2m_dev_dec);
350 video_unregister_device(vfd_dec);
352 v4l2_device_unregister(&dev->v4l2_dev);
354 mtk_vcodec_release_dec_pm(dev);
358 static const struct of_device_id mtk_vcodec_match[] = {
359 {.compatible = "mediatek,mt8173-vcodec-dec",},
363 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
365 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
367 struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
369 flush_workqueue(dev->decode_workqueue);
370 destroy_workqueue(dev->decode_workqueue);
371 if (dev->m2m_dev_dec)
372 v4l2_m2m_release(dev->m2m_dev_dec);
375 video_unregister_device(dev->vfd_dec);
377 v4l2_device_unregister(&dev->v4l2_dev);
378 mtk_vcodec_release_dec_pm(dev);
382 static struct platform_driver mtk_vcodec_dec_driver = {
383 .probe = mtk_vcodec_probe,
384 .remove = mtk_vcodec_dec_remove,
386 .name = MTK_VCODEC_DEC_NAME,
387 .of_match_table = mtk_vcodec_match,
391 module_platform_driver(mtk_vcodec_dec_driver);
393 MODULE_LICENSE("GPL v2");
394 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");