/* * Samsung S5P Multi Format Codec v 5.1 * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Kamil Debski, * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "s5p_mfc_common.h" #include "s5p_mfc_ctrl.h" #include "s5p_mfc_debug.h" #include "s5p_mfc_dec.h" #include "s5p_mfc_enc.h" #include "s5p_mfc_intr.h" #include "s5p_mfc_opr.h" #include "s5p_mfc_cmd.h" #include "s5p_mfc_pm.h" #define S5P_MFC_NAME "s5p-mfc" #define S5P_MFC_DEC_NAME "s5p-mfc-dec" #define S5P_MFC_ENC_NAME "s5p-mfc-enc" int debug; module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose messages"); /* Helper functions for interrupt processing */ /* Remove from hw execution round robin */ void clear_work_bit(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_dev *dev = ctx->dev; spin_lock(&dev->condlock); __clear_bit(ctx->num, &dev->ctx_work_bits); spin_unlock(&dev->condlock); } /* Add to hw execution round robin */ void set_work_bit(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_dev *dev = ctx->dev; spin_lock(&dev->condlock); __set_bit(ctx->num, &dev->ctx_work_bits); spin_unlock(&dev->condlock); } /* Remove from hw execution round robin */ void clear_work_bit_irqsave(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_dev *dev = ctx->dev; unsigned long flags; spin_lock_irqsave(&dev->condlock, flags); __clear_bit(ctx->num, &dev->ctx_work_bits); spin_unlock_irqrestore(&dev->condlock, flags); } /* Add to hw execution round robin */ void set_work_bit_irqsave(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_dev *dev = ctx->dev; unsigned long flags; spin_lock_irqsave(&dev->condlock, flags); __set_bit(ctx->num, &dev->ctx_work_bits); spin_unlock_irqrestore(&dev->condlock, flags); } /* Wake up context wait_queue */ static void wake_up_ctx(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { ctx->int_cond = 1; ctx->int_type = reason; ctx->int_err = err; wake_up(&ctx->queue); } /* Wake up device wait_queue */ static void wake_up_dev(struct s5p_mfc_dev *dev, unsigned int reason, unsigned int err) { dev->int_cond = 1; dev->int_type = reason; dev->int_err = err; wake_up(&dev->queue); } static void s5p_mfc_watchdog(unsigned long arg) { struct s5p_mfc_dev *dev = (struct s5p_mfc_dev *)arg; if (test_bit(0, &dev->hw_lock)) atomic_inc(&dev->watchdog_cnt); if (atomic_read(&dev->watchdog_cnt) >= MFC_WATCHDOG_CNT) { /* This means that hw is busy and no interrupts were * generated by hw for the Nth time of running this * watchdog timer. This usually means a serious hw * error. Now it is time to kill all instances and * reset the MFC. */ mfc_err("Time out during waiting for HW\n"); queue_work(dev->watchdog_workqueue, &dev->watchdog_work); } dev->watchdog_timer.expires = jiffies + msecs_to_jiffies(MFC_WATCHDOG_INTERVAL); add_timer(&dev->watchdog_timer); } static void s5p_mfc_watchdog_worker(struct work_struct *work) { struct s5p_mfc_dev *dev; struct s5p_mfc_ctx *ctx; unsigned long flags; int mutex_locked; int i, ret; dev = container_of(work, struct s5p_mfc_dev, watchdog_work); mfc_err("Driver timeout error handling\n"); /* Lock the mutex that protects open and release. * This is necessary as they may load and unload firmware. */ mutex_locked = mutex_trylock(&dev->mfc_mutex); if (!mutex_locked) mfc_err("Error: some instance may be closing/opening\n"); spin_lock_irqsave(&dev->irqlock, flags); s5p_mfc_clock_off(); for (i = 0; i < MFC_NUM_CONTEXTS; i++) { ctx = dev->ctx[i]; if (!ctx) continue; ctx->state = MFCINST_ERROR; s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->dst_queue, &ctx->vq_dst); s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->src_queue, &ctx->vq_src); clear_work_bit(ctx); wake_up_ctx(ctx, S5P_MFC_R2H_CMD_ERR_RET, 0); } clear_bit(0, &dev->hw_lock); spin_unlock_irqrestore(&dev->irqlock, flags); /* Double check if there is at least one instance running. * If no instance is in memory than no firmware should be present */ if (dev->num_inst > 0) { ret = s5p_mfc_reload_firmware(dev); if (ret) { mfc_err("Failed to reload FW\n"); goto unlock; } s5p_mfc_clock_on(); ret = s5p_mfc_init_hw(dev); if (ret) mfc_err("Failed to reinit FW\n"); } unlock: if (mutex_locked) mutex_unlock(&dev->mfc_mutex); } static enum s5p_mfc_node_type s5p_mfc_get_node_type(struct file *file) { struct video_device *vdev = video_devdata(file); if (!vdev) { mfc_err("failed to get video_device"); return MFCNODE_INVALID; } if (vdev->index == 0) return MFCNODE_DECODER; else if (vdev->index == 1) return MFCNODE_ENCODER; return MFCNODE_INVALID; } static void s5p_mfc_clear_int_flags(struct s5p_mfc_dev *dev) { mfc_write(dev, 0, S5P_FIMV_RISC_HOST_INT); mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD); mfc_write(dev, 0xffff, S5P_FIMV_SI_RTN_CHID); } static void s5p_mfc_handle_frame_all_extracted(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_buf *dst_buf; struct s5p_mfc_dev *dev = ctx->dev; ctx->state = MFCINST_FINISHED; ctx->sequence++; while (!list_empty(&ctx->dst_queue)) { dst_buf = list_entry(ctx->dst_queue.next, struct s5p_mfc_buf, list); mfc_debug(2, "Cleaning up buffer: %d\n", dst_buf->b->v4l2_buf.index); vb2_set_plane_payload(dst_buf->b, 0, 0); vb2_set_plane_payload(dst_buf->b, 1, 0); list_del(&dst_buf->list); ctx->dst_queue_cnt--; dst_buf->b->v4l2_buf.sequence = (ctx->sequence++); if (s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_top, ctx) == s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_bot, ctx)) dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE; else dst_buf->b->v4l2_buf.field = V4L2_FIELD_INTERLACED; ctx->dec_dst_flag &= ~(1 << dst_buf->b->v4l2_buf.index); vb2_buffer_done(dst_buf->b, VB2_BUF_STATE_DONE); } } static void s5p_mfc_handle_frame_copy_time(struct s5p_mfc_ctx *ctx) { struct s5p_mfc_dev *dev = ctx->dev; struct s5p_mfc_buf *dst_buf, *src_buf; size_t dec_y_addr; unsigned int frame_type; dec_y_addr = s5p_mfc_hw_call(dev->mfc_ops, get_dec_y_adr, dev); frame_type = s5p_mfc_hw_call(dev->mfc_ops, get_dec_frame_type, dev); /* Copy timestamp / timecode from decoded src to dst and set appropraite flags */ src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list); list_for_each_entry(dst_buf, &ctx->dst_queue, list) { if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dec_y_addr) { memcpy(&dst_buf->b->v4l2_buf.timecode, &src_buf->b->v4l2_buf.timecode, sizeof(struct v4l2_timecode)); memcpy(&dst_buf->b->v4l2_buf.timestamp, &src_buf->b->v4l2_buf.timestamp, sizeof(struct timeval)); switch (frame_type) { case S5P_FIMV_DECODE_FRAME_I_FRAME: dst_buf->b->v4l2_buf.flags |= V4L2_BUF_FLAG_KEYFRAME; break; case S5P_FIMV_DECODE_FRAME_P_FRAME: dst_buf->b->v4l2_buf.flags |= V4L2_BUF_FLAG_PFRAME; break; case S5P_FIMV_DECODE_FRAME_B_FRAME: dst_buf->b->v4l2_buf.flags |= V4L2_BUF_FLAG_BFRAME; break; } break; } } } static void s5p_mfc_handle_frame_new(struct s5p_mfc_ctx *ctx, unsigned int err) { struct s5p_mfc_dev *dev = ctx->dev; struct s5p_mfc_buf *dst_buf; size_t dspl_y_addr; unsigned int frame_type; unsigned int index; dspl_y_addr = s5p_mfc_hw_call(dev->mfc_ops, get_dspl_y_adr, dev); frame_type = s5p_mfc_hw_call(dev->mfc_ops, get_dec_frame_type, dev); /* If frame is same as previous then skip and do not dequeue */ if (frame_type == S5P_FIMV_DECODE_FRAME_SKIPPED) { if (!ctx->after_packed_pb) ctx->sequence++; ctx->after_packed_pb = 0; return; } ctx->sequence++; /* The MFC returns address of the buffer, now we have to * check which videobuf does it correspond to */ list_for_each_entry(dst_buf, &ctx->dst_queue, list) { /* Check if this is the buffer we're looking for */ if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dspl_y_addr) { list_del(&dst_buf->list); ctx->dst_queue_cnt--; dst_buf->b->v4l2_buf.sequence = ctx->sequence; if (s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_top, ctx) == s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_bot, ctx)) dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE; else dst_buf->b->v4l2_buf.field = V4L2_FIELD_INTERLACED; vb2_set_plane_payload(dst_buf->b, 0, ctx->luma_size); vb2_set_plane_payload(dst_buf->b, 1, ctx->chroma_size); clear_bit(dst_buf->b->v4l2_buf.index, &ctx->dec_dst_flag); vb2_buffer_done(dst_buf->b, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); index = dst_buf->b->v4l2_buf.index; break; } } } /* Handle frame decoding interrupt */ static void s5p_mfc_handle_frame(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { struct s5p_mfc_dev *dev = ctx->dev; unsigned int dst_frame_status; struct s5p_mfc_buf *src_buf; unsigned long flags; unsigned int res_change; unsigned int index; dst_frame_status = s5p_mfc_hw_call(dev->mfc_ops, get_dspl_status, dev) & S5P_FIMV_DEC_STATUS_DECODING_STATUS_MASK; res_change = (s5p_mfc_hw_call(dev->mfc_ops, get_dspl_status, dev) & S5P_FIMV_DEC_STATUS_RESOLUTION_MASK) >> S5P_FIMV_DEC_STATUS_RESOLUTION_SHIFT; mfc_debug(2, "Frame Status: %x\n", dst_frame_status); if (ctx->state == MFCINST_RES_CHANGE_INIT) ctx->state = MFCINST_RES_CHANGE_FLUSH; if (res_change == S5P_FIMV_RES_INCREASE || res_change == S5P_FIMV_RES_DECREASE) { ctx->state = MFCINST_RES_CHANGE_INIT; s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); wake_up_ctx(ctx, reason, err); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); return; } if (ctx->dpb_flush_flag) ctx->dpb_flush_flag = 0; spin_lock_irqsave(&dev->irqlock, flags); /* All frames remaining in the buffer have been extracted */ if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_EMPTY) { if (ctx->state == MFCINST_RES_CHANGE_FLUSH) { s5p_mfc_handle_frame_all_extracted(ctx); ctx->state = MFCINST_RES_CHANGE_END; goto leave_handle_frame; } else { s5p_mfc_handle_frame_all_extracted(ctx); } } if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY || dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_ONLY) s5p_mfc_handle_frame_copy_time(ctx); /* A frame has been decoded and is in the buffer */ if (dst_frame_status == S5P_FIMV_DEC_STATUS_DISPLAY_ONLY || dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY) { s5p_mfc_handle_frame_new(ctx, err); } else { mfc_debug(2, "No frame decode\n"); } /* Mark source buffer as complete */ if (dst_frame_status != S5P_FIMV_DEC_STATUS_DISPLAY_ONLY && !list_empty(&ctx->src_queue)) { src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list); ctx->consumed_stream += s5p_mfc_hw_call(dev->mfc_ops, get_consumed_stream, dev); if (ctx->codec_mode != S5P_MFC_CODEC_H264_DEC && ctx->consumed_stream + STUFF_BYTE < src_buf->b->v4l2_planes[0].bytesused) { /* Run MFC again on the same buffer */ mfc_debug(2, "Running again the same buffer\n"); ctx->after_packed_pb = 1; } else { index = src_buf->b->v4l2_buf.index; mfc_debug(2, "MFC needs next buffer\n"); ctx->consumed_stream = 0; list_del(&src_buf->list); ctx->src_queue_cnt--; if (s5p_mfc_hw_call(dev->mfc_ops, err_dec, err) > 0) vb2_buffer_done(src_buf->b, VB2_BUF_STATE_ERROR); else vb2_buffer_done(src_buf->b, VB2_BUF_STATE_DONE); } } leave_handle_frame: spin_unlock_irqrestore(&dev->irqlock, flags); if ((ctx->src_queue_cnt == 0 && ctx->state != MFCINST_FINISHING) || ctx->dst_queue_cnt < ctx->dpb_count) clear_work_bit(ctx); s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); wake_up_ctx(ctx, reason, err); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); } /* Error handling for interrupt */ static void s5p_mfc_handle_error(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { struct s5p_mfc_dev *dev; unsigned long flags; /* If no context is available then all necessary * processing has been done. */ if (ctx == NULL) return; dev = ctx->dev; mfc_err("Interrupt Error: %08x\n", err); s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); wake_up_dev(dev, reason, err); /* Error recovery is dependent on the state of context */ switch (ctx->state) { case MFCINST_INIT: /* This error had to happen while acquireing instance */ case MFCINST_GOT_INST: /* This error had to happen while parsing the header */ case MFCINST_HEAD_PARSED: /* This error had to happen while setting dst buffers */ case MFCINST_RETURN_INST: /* This error had to happen while releasing instance */ clear_work_bit(ctx); wake_up_ctx(ctx, reason, err); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); ctx->state = MFCINST_ERROR; break; case MFCINST_FINISHING: case MFCINST_FINISHED: case MFCINST_RUNNING: /* It is higly probable that an error occured * while decoding a frame */ clear_work_bit(ctx); ctx->state = MFCINST_ERROR; /* Mark all dst buffers as having an error */ spin_lock_irqsave(&dev->irqlock, flags); s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->dst_queue, &ctx->vq_dst); /* Mark all src buffers as having an error */ s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->src_queue, &ctx->vq_src); spin_unlock_irqrestore(&dev->irqlock, flags); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); break; default: mfc_err("Encountered an error interrupt which had not been handled\n"); break; } return; } /* Header parsing interrupt handling */ static void s5p_mfc_handle_seq_done(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { struct s5p_mfc_dev *dev; if (ctx == NULL) return; dev = ctx->dev; if (ctx->c_ops->post_seq_start) { if (ctx->c_ops->post_seq_start(ctx)) mfc_err("post_seq_start() failed\n"); } else { ctx->img_width = s5p_mfc_hw_call(dev->mfc_ops, get_img_width, dev); ctx->img_height = s5p_mfc_hw_call(dev->mfc_ops, get_img_height, dev); s5p_mfc_hw_call(dev->mfc_ops, dec_calc_dpb_size, ctx); ctx->dpb_count = s5p_mfc_hw_call(dev->mfc_ops, get_dpb_count, dev); ctx->mv_count = s5p_mfc_hw_call(dev->mfc_ops, get_mv_count, dev); if (ctx->img_width == 0 || ctx->img_height == 0) ctx->state = MFCINST_ERROR; else ctx->state = MFCINST_HEAD_PARSED; if ((ctx->codec_mode == S5P_MFC_CODEC_H264_DEC || ctx->codec_mode == S5P_MFC_CODEC_H264_MVC_DEC) && !list_empty(&ctx->src_queue)) { struct s5p_mfc_buf *src_buf; src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list); if (s5p_mfc_hw_call(dev->mfc_ops, get_consumed_stream, dev) < src_buf->b->v4l2_planes[0].bytesused) ctx->head_processed = 0; else ctx->head_processed = 1; } else { ctx->head_processed = 1; } } s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); clear_work_bit(ctx); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); wake_up_ctx(ctx, reason, err); } /* Header parsing interrupt handling */ static void s5p_mfc_handle_init_buffers(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { struct s5p_mfc_buf *src_buf; struct s5p_mfc_dev *dev; unsigned long flags; if (ctx == NULL) return; dev = ctx->dev; s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); ctx->int_type = reason; ctx->int_err = err; ctx->int_cond = 1; clear_work_bit(ctx); if (err == 0) { ctx->state = MFCINST_RUNNING; if (!ctx->dpb_flush_flag && ctx->head_processed) { spin_lock_irqsave(&dev->irqlock, flags); if (!list_empty(&ctx->src_queue)) { src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list); list_del(&src_buf->list); ctx->src_queue_cnt--; vb2_buffer_done(src_buf->b, VB2_BUF_STATE_DONE); } spin_unlock_irqrestore(&dev->irqlock, flags); } else { ctx->dpb_flush_flag = 0; } if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); wake_up(&ctx->queue); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); } else { if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); wake_up(&ctx->queue); } } static void s5p_mfc_handle_stream_complete(struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err) { struct s5p_mfc_dev *dev = ctx->dev; struct s5p_mfc_buf *mb_entry; mfc_debug(2, "Stream completed"); s5p_mfc_clear_int_flags(dev); ctx->int_type = reason; ctx->int_err = err; ctx->state = MFCINST_FINISHED; spin_lock(&dev->irqlock); if (!list_empty(&ctx->dst_queue)) { mb_entry = list_entry(ctx->dst_queue.next, struct s5p_mfc_buf, list); list_del(&mb_entry->list); ctx->dst_queue_cnt--; vb2_set_plane_payload(mb_entry->b, 0, 0); vb2_buffer_done(mb_entry->b, VB2_BUF_STATE_DONE); } spin_unlock(&dev->irqlock); clear_work_bit(ctx); if (test_and_clear_bit(0, &dev->hw_lock) == 0) WARN_ON(1); s5p_mfc_clock_off(); wake_up(&ctx->queue); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); } /* Interrupt processing */ static irqreturn_t s5p_mfc_irq(int irq, void *priv) { struct s5p_mfc_dev *dev = priv; struct s5p_mfc_ctx *ctx; unsigned int reason; unsigned int err; mfc_debug_enter(); /* Reset the timeout watchdog */ atomic_set(&dev->watchdog_cnt, 0); ctx = dev->ctx[dev->curr_ctx]; /* Get the reason of interrupt and the error code */ reason = s5p_mfc_hw_call(dev->mfc_ops, get_int_reason, dev); err = s5p_mfc_hw_call(dev->mfc_ops, get_int_err, dev); mfc_debug(1, "Int reason: %d (err: %08x)\n", reason, err); switch (reason) { case S5P_MFC_R2H_CMD_ERR_RET: /* An error has occured */ if (ctx->state == MFCINST_RUNNING && s5p_mfc_hw_call(dev->mfc_ops, err_dec, err) >= dev->warn_start) s5p_mfc_handle_frame(ctx, reason, err); else s5p_mfc_handle_error(ctx, reason, err); clear_bit(0, &dev->enter_suspend); break; case S5P_MFC_R2H_CMD_SLICE_DONE_RET: case S5P_MFC_R2H_CMD_FIELD_DONE_RET: case S5P_MFC_R2H_CMD_FRAME_DONE_RET: if (ctx->c_ops->post_frame_start) { if (ctx->c_ops->post_frame_start(ctx)) mfc_err("post_frame_start() failed\n"); s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); wake_up_ctx(ctx, reason, err); if (test_and_clear_bit(0, &dev->hw_lock) == 0) BUG(); s5p_mfc_clock_off(); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); } else { s5p_mfc_handle_frame(ctx, reason, err); } break; case S5P_MFC_R2H_CMD_SEQ_DONE_RET: s5p_mfc_handle_seq_done(ctx, reason, err); break; case S5P_MFC_R2H_CMD_OPEN_INSTANCE_RET: ctx->inst_no = s5p_mfc_hw_call(dev->mfc_ops, get_inst_no, dev); ctx->state = MFCINST_GOT_INST; clear_work_bit(ctx); wake_up(&ctx->queue); goto irq_cleanup_hw; case S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET: clear_work_bit(ctx); ctx->state = MFCINST_FREE; wake_up(&ctx->queue); goto irq_cleanup_hw; case S5P_MFC_R2H_CMD_SYS_INIT_RET: case S5P_MFC_R2H_CMD_FW_STATUS_RET: case S5P_MFC_R2H_CMD_SLEEP_RET: case S5P_MFC_R2H_CMD_WAKEUP_RET: if (ctx) clear_work_bit(ctx); s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); wake_up_dev(dev, reason, err); clear_bit(0, &dev->hw_lock); clear_bit(0, &dev->enter_suspend); break; case S5P_MFC_R2H_CMD_INIT_BUFFERS_RET: s5p_mfc_handle_init_buffers(ctx, reason, err); break; case S5P_MFC_R2H_CMD_COMPLETE_SEQ_RET: s5p_mfc_handle_stream_complete(ctx, reason, err); break; default: mfc_debug(2, "Unknown int reason\n"); s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); } mfc_debug_leave(); return IRQ_HANDLED; irq_cleanup_hw: s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev); ctx->int_type = reason; ctx->int_err = err; ctx->int_cond = 1; if (test_and_clear_bit(0, &dev->hw_lock) == 0) mfc_err("Failed to unlock hw\n"); s5p_mfc_clock_off(); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); mfc_debug(2, "Exit via irq_cleanup_hw\n"); return IRQ_HANDLED; } /* Open an MFC node */ static int s5p_mfc_open(struct file *file) { struct s5p_mfc_dev *dev = video_drvdata(file); struct s5p_mfc_ctx *ctx = NULL; struct vb2_queue *q; int ret = 0; mfc_debug_enter(); if (mutex_lock_interruptible(&dev->mfc_mutex)) return -ERESTARTSYS; dev->num_inst++; /* It is guarded by mfc_mutex in vfd */ /* Allocate memory for context */ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); if (!ctx) { mfc_err("Not enough memory\n"); ret = -ENOMEM; goto err_alloc; } v4l2_fh_init(&ctx->fh, video_devdata(file)); file->private_data = &ctx->fh; v4l2_fh_add(&ctx->fh); ctx->dev = dev; INIT_LIST_HEAD(&ctx->src_queue); INIT_LIST_HEAD(&ctx->dst_queue); ctx->src_queue_cnt = 0; ctx->dst_queue_cnt = 0; /* Get context number */ ctx->num = 0; while (dev->ctx[ctx->num]) { ctx->num++; if (ctx->num >= MFC_NUM_CONTEXTS) { mfc_err("Too many open contexts\n"); ret = -EBUSY; goto err_no_ctx; } } /* Mark context as idle */ clear_work_bit_irqsave(ctx); dev->ctx[ctx->num] = ctx; if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) { ctx->type = MFCINST_DECODER; ctx->c_ops = get_dec_codec_ops(); s5p_mfc_dec_init(ctx); /* Setup ctrl handler */ ret = s5p_mfc_dec_ctrls_setup(ctx); if (ret) { mfc_err("Failed to setup mfc controls\n"); goto err_ctrls_setup; } } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) { ctx->type = MFCINST_ENCODER; ctx->c_ops = get_enc_codec_ops(); /* only for encoder */ INIT_LIST_HEAD(&ctx->ref_queue); ctx->ref_queue_cnt = 0; s5p_mfc_enc_init(ctx); /* Setup ctrl handler */ ret = s5p_mfc_enc_ctrls_setup(ctx); if (ret) { mfc_err("Failed to setup mfc controls\n"); goto err_ctrls_setup; } } else { ret = -ENOENT; goto err_bad_node; } ctx->fh.ctrl_handler = &ctx->ctrl_handler; ctx->inst_no = -1; /* Load firmware if this is the first instance */ if (dev->num_inst == 1) { dev->watchdog_timer.expires = jiffies + msecs_to_jiffies(MFC_WATCHDOG_INTERVAL); add_timer(&dev->watchdog_timer); ret = s5p_mfc_power_on(); if (ret < 0) { mfc_err("power on failed\n"); goto err_pwr_enable; } s5p_mfc_clock_on(); ret = s5p_mfc_alloc_and_load_firmware(dev); if (ret) goto err_alloc_fw; /* Init the FW */ ret = s5p_mfc_init_hw(dev); if (ret) goto err_init_hw; s5p_mfc_clock_off(); } /* Init videobuf2 queue for CAPTURE */ q = &ctx->vq_dst; q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; q->drv_priv = &ctx->fh; if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) { q->io_modes = VB2_MMAP; q->ops = get_dec_queue_ops(); } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) { q->io_modes = VB2_MMAP | VB2_USERPTR; q->ops = get_enc_queue_ops(); } else { ret = -ENOENT; goto err_queue_init; } q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops; ret = vb2_queue_init(q); if (ret) { mfc_err("Failed to initialize videobuf2 queue(capture)\n"); goto err_queue_init; } /* Init videobuf2 queue for OUTPUT */ q = &ctx->vq_src; q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; q->io_modes = VB2_MMAP; q->drv_priv = &ctx->fh; if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) { q->io_modes = VB2_MMAP; q->ops = get_dec_queue_ops(); } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) { q->io_modes = VB2_MMAP | VB2_USERPTR; q->ops = get_enc_queue_ops(); } else { ret = -ENOENT; goto err_queue_init; } q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops; ret = vb2_queue_init(q); if (ret) { mfc_err("Failed to initialize videobuf2 queue(output)\n"); goto err_queue_init; } init_waitqueue_head(&ctx->queue); mutex_unlock(&dev->mfc_mutex); mfc_debug_leave(); return ret; /* Deinit when failure occured */ err_queue_init: err_init_hw: s5p_mfc_release_firmware(dev); err_alloc_fw: dev->ctx[ctx->num] = NULL; del_timer_sync(&dev->watchdog_timer); s5p_mfc_clock_off(); err_pwr_enable: if (dev->num_inst == 1) { if (s5p_mfc_power_off() < 0) mfc_err("power off failed\n"); s5p_mfc_release_firmware(dev); } err_ctrls_setup: s5p_mfc_dec_ctrls_delete(ctx); err_bad_node: err_no_ctx: v4l2_fh_del(&ctx->fh); v4l2_fh_exit(&ctx->fh); kfree(ctx); err_alloc: dev->num_inst--; mutex_unlock(&dev->mfc_mutex); mfc_debug_leave(); return ret; } /* Release MFC context */ static int s5p_mfc_release(struct file *file) { struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data); struct s5p_mfc_dev *dev = ctx->dev; mfc_debug_enter(); mutex_lock(&dev->mfc_mutex); s5p_mfc_clock_on(); vb2_queue_release(&ctx->vq_src); vb2_queue_release(&ctx->vq_dst); /* Mark context as idle */ clear_work_bit_irqsave(ctx); /* If instance was initialised then * return instance and free reosurces */ if (ctx->inst_no != MFC_NO_INSTANCE_SET) { mfc_debug(2, "Has to free instance\n"); ctx->state = MFCINST_RETURN_INST; set_work_bit_irqsave(ctx); s5p_mfc_clean_ctx_int_flags(ctx); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); /* Wait until instance is returned or timeout occured */ if (s5p_mfc_wait_for_done_ctx (ctx, S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET, 0)) { s5p_mfc_clock_off(); mfc_err("Err returning instance\n"); } mfc_debug(2, "After free instance\n"); /* Free resources */ s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers, ctx); s5p_mfc_hw_call(dev->mfc_ops, release_instance_buffer, ctx); if (ctx->type == MFCINST_DECODER) s5p_mfc_hw_call(dev->mfc_ops, release_dec_desc_buffer, ctx); ctx->inst_no = MFC_NO_INSTANCE_SET; } /* hardware locking scheme */ if (dev->curr_ctx == ctx->num) clear_bit(0, &dev->hw_lock); dev->num_inst--; if (dev->num_inst == 0) { mfc_debug(2, "Last instance - release firmware\n"); /* reset <-> F/W release */ s5p_mfc_reset(dev); s5p_mfc_deinit_hw(dev); s5p_mfc_release_firmware(dev); del_timer_sync(&dev->watchdog_timer); if (s5p_mfc_power_off() < 0) mfc_err("Power off failed\n"); } mfc_debug(2, "Shutting down clock\n"); s5p_mfc_clock_off(); dev->ctx[ctx->num] = NULL; s5p_mfc_dec_ctrls_delete(ctx); v4l2_fh_del(&ctx->fh); v4l2_fh_exit(&ctx->fh); kfree(ctx); mfc_debug_leave(); mutex_unlock(&dev->mfc_mutex); return 0; } /* Poll */ static unsigned int s5p_mfc_poll(struct file *file, struct poll_table_struct *wait) { struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data); struct s5p_mfc_dev *dev = ctx->dev; struct vb2_queue *src_q, *dst_q; struct vb2_buffer *src_vb = NULL, *dst_vb = NULL; unsigned int rc = 0; unsigned long flags; mutex_lock(&dev->mfc_mutex); src_q = &ctx->vq_src; dst_q = &ctx->vq_dst; /* * There has to be at least one buffer queued on each queued_list, which * means either in driver already or waiting for driver to claim it * and start processing. */ if ((!src_q->streaming || list_empty(&src_q->queued_list)) && (!dst_q->streaming || list_empty(&dst_q->queued_list))) { rc = POLLERR; goto end; } mutex_unlock(&dev->mfc_mutex); poll_wait(file, &ctx->fh.wait, wait); poll_wait(file, &src_q->done_wq, wait); poll_wait(file, &dst_q->done_wq, wait); mutex_lock(&dev->mfc_mutex); if (v4l2_event_pending(&ctx->fh)) rc |= POLLPRI; spin_lock_irqsave(&src_q->done_lock, flags); if (!list_empty(&src_q->done_list)) src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer, done_entry); if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE || src_vb->state == VB2_BUF_STATE_ERROR)) rc |= POLLOUT | POLLWRNORM; spin_unlock_irqrestore(&src_q->done_lock, flags); spin_lock_irqsave(&dst_q->done_lock, flags); if (!list_empty(&dst_q->done_list)) dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer, done_entry); if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE || dst_vb->state == VB2_BUF_STATE_ERROR)) rc |= POLLIN | POLLRDNORM; spin_unlock_irqrestore(&dst_q->done_lock, flags); end: mutex_unlock(&dev->mfc_mutex); return rc; } /* Mmap */ static int s5p_mfc_mmap(struct file *file, struct vm_area_struct *vma) { struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data); struct s5p_mfc_dev *dev = ctx->dev; unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; int ret; if (mutex_lock_interruptible(&dev->mfc_mutex)) return -ERESTARTSYS; if (offset < DST_QUEUE_OFF_BASE) { mfc_debug(2, "mmaping source\n"); ret = vb2_mmap(&ctx->vq_src, vma); } else { /* capture */ mfc_debug(2, "mmaping destination\n"); vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT); ret = vb2_mmap(&ctx->vq_dst, vma); } mutex_unlock(&dev->mfc_mutex); return ret; } /* v4l2 ops */ static const struct v4l2_file_operations s5p_mfc_fops = { .owner = THIS_MODULE, .open = s5p_mfc_open, .release = s5p_mfc_release, .poll = s5p_mfc_poll, .unlocked_ioctl = video_ioctl2, .mmap = s5p_mfc_mmap, }; static int match_child(struct device *dev, void *data) { if (!dev_name(dev)) return 0; return !strcmp(dev_name(dev), (char *)data); } /* MFC probe function */ static int s5p_mfc_probe(struct platform_device *pdev) { struct s5p_mfc_dev *dev; struct video_device *vfd; struct resource *res; int ret; pr_debug("%s++\n", __func__); dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); if (!dev) { dev_err(&pdev->dev, "Not enough memory for MFC device\n"); return -ENOMEM; } spin_lock_init(&dev->irqlock); spin_lock_init(&dev->condlock); dev->plat_dev = pdev; if (!dev->plat_dev) { dev_err(&pdev->dev, "No platform data specified\n"); return -ENODEV; } dev->variant = (struct s5p_mfc_variant *) platform_get_device_id(pdev)->driver_data; ret = s5p_mfc_init_pm(dev); if (ret < 0) { dev_err(&pdev->dev, "failed to get mfc clock source\n"); return ret; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dev->regs_base = devm_request_and_ioremap(&pdev->dev, res); if (dev->regs_base == NULL) { dev_err(&pdev->dev, "Failed to obtain io memory\n"); return -ENOENT; } res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (res == NULL) { dev_err(&pdev->dev, "failed to get irq resource\n"); ret = -ENOENT; goto err_res; } dev->irq = res->start; ret = devm_request_irq(&pdev->dev, dev->irq, s5p_mfc_irq, IRQF_DISABLED, pdev->name, dev); if (ret) { dev_err(&pdev->dev, "Failed to install irq (%d)\n", ret); goto err_res; } dev->mem_dev_l = device_find_child(&dev->plat_dev->dev, "s5p-mfc-l", match_child); if (!dev->mem_dev_l) { mfc_err("Mem child (L) device get failed\n"); ret = -ENODEV; goto err_res; } dev->mem_dev_r = device_find_child(&dev->plat_dev->dev, "s5p-mfc-r", match_child); if (!dev->mem_dev_r) { mfc_err("Mem child (R) device get failed\n"); ret = -ENODEV; goto err_res; } dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l); if (IS_ERR_OR_NULL(dev->alloc_ctx[0])) { ret = PTR_ERR(dev->alloc_ctx[0]); goto err_res; } dev->alloc_ctx[1] = vb2_dma_contig_init_ctx(dev->mem_dev_r); if (IS_ERR_OR_NULL(dev->alloc_ctx[1])) { ret = PTR_ERR(dev->alloc_ctx[1]); goto err_mem_init_ctx_1; } mutex_init(&dev->mfc_mutex); ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); if (ret) goto err_v4l2_dev_reg; init_waitqueue_head(&dev->queue); /* decoder */ vfd = video_device_alloc(); if (!vfd) { v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n"); ret = -ENOMEM; goto err_dec_alloc; } vfd->fops = &s5p_mfc_fops, vfd->ioctl_ops = get_dec_v4l2_ioctl_ops(); vfd->release = video_device_release, vfd->lock = &dev->mfc_mutex; vfd->v4l2_dev = &dev->v4l2_dev; vfd->vfl_dir = VFL_DIR_M2M; snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_DEC_NAME); dev->vfd_dec = vfd; ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); if (ret) { v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); video_device_release(vfd); goto err_dec_reg; } v4l2_info(&dev->v4l2_dev, "decoder registered as /dev/video%d\n", vfd->num); video_set_drvdata(vfd, dev); /* encoder */ vfd = video_device_alloc(); if (!vfd) { v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n"); ret = -ENOMEM; goto err_enc_alloc; } vfd->fops = &s5p_mfc_fops, vfd->ioctl_ops = get_enc_v4l2_ioctl_ops(); vfd->release = video_device_release, vfd->lock = &dev->mfc_mutex; vfd->v4l2_dev = &dev->v4l2_dev; vfd->vfl_dir = VFL_DIR_M2M; snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_ENC_NAME); dev->vfd_enc = vfd; ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); if (ret) { v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); video_device_release(vfd); goto err_enc_reg; } v4l2_info(&dev->v4l2_dev, "encoder registered as /dev/video%d\n", vfd->num); video_set_drvdata(vfd, dev); platform_set_drvdata(pdev, dev); dev->hw_lock = 0; dev->watchdog_workqueue = create_singlethread_workqueue(S5P_MFC_NAME); INIT_WORK(&dev->watchdog_work, s5p_mfc_watchdog_worker); atomic_set(&dev->watchdog_cnt, 0); init_timer(&dev->watchdog_timer); dev->watchdog_timer.data = (unsigned long)dev; dev->watchdog_timer.function = s5p_mfc_watchdog; /* Initialize HW ops and commands based on MFC version */ s5p_mfc_init_hw_ops(dev); s5p_mfc_init_hw_cmds(dev); pr_debug("%s--\n", __func__); return 0; /* Deinit MFC if probe had failed */ err_enc_reg: video_device_release(dev->vfd_enc); err_enc_alloc: video_unregister_device(dev->vfd_dec); err_dec_reg: video_device_release(dev->vfd_dec); err_dec_alloc: v4l2_device_unregister(&dev->v4l2_dev); err_v4l2_dev_reg: vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]); err_mem_init_ctx_1: vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]); err_res: s5p_mfc_final_pm(dev); pr_debug("%s-- with error\n", __func__); return ret; } /* Remove the driver */ static int __devexit s5p_mfc_remove(struct platform_device *pdev) { struct s5p_mfc_dev *dev = platform_get_drvdata(pdev); v4l2_info(&dev->v4l2_dev, "Removing %s\n", pdev->name); del_timer_sync(&dev->watchdog_timer); flush_workqueue(dev->watchdog_workqueue); destroy_workqueue(dev->watchdog_workqueue); video_unregister_device(dev->vfd_enc); video_unregister_device(dev->vfd_dec); v4l2_device_unregister(&dev->v4l2_dev); vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]); vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]); s5p_mfc_final_pm(dev); return 0; } #ifdef CONFIG_PM_SLEEP static int s5p_mfc_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev); int ret; if (m_dev->num_inst == 0) return 0; if (test_and_set_bit(0, &m_dev->enter_suspend) != 0) { mfc_err("Error: going to suspend for a second time\n"); return -EIO; } /* Check if we're processing then wait if it necessary. */ while (test_and_set_bit(0, &m_dev->hw_lock) != 0) { /* Try and lock the HW */ /* Wait on the interrupt waitqueue */ ret = wait_event_interruptible_timeout(m_dev->queue, m_dev->int_cond || m_dev->ctx[m_dev->curr_ctx]->int_cond, msecs_to_jiffies(MFC_INT_TIMEOUT)); if (ret == 0) { mfc_err("Waiting for hardware to finish timed out\n"); return -EIO; } } return s5p_mfc_sleep(m_dev); } static int s5p_mfc_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev); if (m_dev->num_inst == 0) return 0; return s5p_mfc_wakeup(m_dev); } #endif #ifdef CONFIG_PM_RUNTIME static int s5p_mfc_runtime_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev); atomic_set(&m_dev->pm.power, 0); return 0; } static int s5p_mfc_runtime_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev); int pre_power; if (!m_dev->alloc_ctx) return 0; pre_power = atomic_read(&m_dev->pm.power); atomic_set(&m_dev->pm.power, 1); return 0; } #endif /* Power management */ static const struct dev_pm_ops s5p_mfc_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(s5p_mfc_suspend, s5p_mfc_resume) SET_RUNTIME_PM_OPS(s5p_mfc_runtime_suspend, s5p_mfc_runtime_resume, NULL) }; struct s5p_mfc_buf_size_v5 mfc_buf_size_v5 = { .h264_ctx = MFC_H264_CTX_BUF_SIZE, .non_h264_ctx = MFC_CTX_BUF_SIZE, .dsc = DESC_BUF_SIZE, .shm = SHARED_BUF_SIZE, }; struct s5p_mfc_buf_size buf_size_v5 = { .fw = MAX_FW_SIZE, .cpb = MAX_CPB_SIZE, .priv = &mfc_buf_size_v5, }; struct s5p_mfc_buf_align mfc_buf_align_v5 = { .base = MFC_BASE_ALIGN_ORDER, }; static struct s5p_mfc_variant mfc_drvdata_v5 = { .version = MFC_VERSION, .port_num = MFC_NUM_PORTS, .buf_size = &buf_size_v5, .buf_align = &mfc_buf_align_v5, .mclk_name = "sclk_mfc", .fw_name = "s5p-mfc.fw", }; struct s5p_mfc_buf_size_v6 mfc_buf_size_v6 = { .dev_ctx = MFC_CTX_BUF_SIZE_V6, .h264_dec_ctx = MFC_H264_DEC_CTX_BUF_SIZE_V6, .other_dec_ctx = MFC_OTHER_DEC_CTX_BUF_SIZE_V6, .h264_enc_ctx = MFC_H264_ENC_CTX_BUF_SIZE_V6, .other_enc_ctx = MFC_OTHER_ENC_CTX_BUF_SIZE_V6, }; struct s5p_mfc_buf_size buf_size_v6 = { .fw = MAX_FW_SIZE_V6, .cpb = MAX_CPB_SIZE_V6, .priv = &mfc_buf_size_v6, }; struct s5p_mfc_buf_align mfc_buf_align_v6 = { .base = 0, }; static struct s5p_mfc_variant mfc_drvdata_v6 = { .version = MFC_VERSION_V6, .port_num = MFC_NUM_PORTS_V6, .buf_size = &buf_size_v6, .buf_align = &mfc_buf_align_v6, .mclk_name = "aclk_333", .fw_name = "s5p-mfc-v6.fw", }; static struct platform_device_id mfc_driver_ids[] = { { .name = "s5p-mfc", .driver_data = (unsigned long)&mfc_drvdata_v5, }, { .name = "s5p-mfc-v5", .driver_data = (unsigned long)&mfc_drvdata_v5, }, { .name = "s5p-mfc-v6", .driver_data = (unsigned long)&mfc_drvdata_v6, }, {}, }; MODULE_DEVICE_TABLE(platform, mfc_driver_ids); static struct platform_driver s5p_mfc_driver = { .probe = s5p_mfc_probe, .remove = __devexit_p(s5p_mfc_remove), .id_table = mfc_driver_ids, .driver = { .name = S5P_MFC_NAME, .owner = THIS_MODULE, .pm = &s5p_mfc_pm_ops }, }; module_platform_driver(s5p_mfc_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Kamil Debski "); MODULE_DESCRIPTION("Samsung S5P Multi Format Codec V4L2 driver");