drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c
Extension
.c
Size
2121 bytes
Lines
100
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2016 MediaTek Inc.
 * Author: Daniel Hsiao <daniel.hsiao@mediatek.com>
 *	Jungchang Tsao <jungchang.tsao@mediatek.com>
 *	Tiffany Lin <tiffany.lin@mediatek.com>
 */

#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/slab.h>

#include "venc_drv_base.h"
#include "venc_drv_if.h"

#include "mtk_vcodec_enc.h"
#include "mtk_vcodec_enc_pm.h"

int venc_if_init(struct mtk_vcodec_enc_ctx *ctx, unsigned int fourcc)
{
	int ret = 0;

	switch (fourcc) {
	case V4L2_PIX_FMT_VP8:
		ctx->enc_if = &venc_vp8_if;
		break;
	case V4L2_PIX_FMT_H264:
		ctx->enc_if = &venc_h264_if;
		break;
	default:
		return -EINVAL;
	}

	mtk_venc_lock(ctx);
	ret = ctx->enc_if->init(ctx);
	mtk_venc_unlock(ctx);

	return ret;
}

int venc_if_set_param(struct mtk_vcodec_enc_ctx *ctx,
		      enum venc_set_param_type type, struct venc_enc_param *in)
{
	int ret = 0;

	mtk_venc_lock(ctx);
	ret = ctx->enc_if->set_param(ctx->drv_handle, type, in);
	mtk_venc_unlock(ctx);

	return ret;
}

int venc_if_encode(struct mtk_vcodec_enc_ctx *ctx,
		   enum venc_start_opt opt, struct venc_frm_buf *frm_buf,
		   struct mtk_vcodec_mem *bs_buf,
		   struct venc_done_result *result)
{
	int ret = 0;
	unsigned long flags;

	mtk_venc_lock(ctx);

	spin_lock_irqsave(&ctx->dev->irqlock, flags);
	ctx->dev->curr_ctx = ctx;
	spin_unlock_irqrestore(&ctx->dev->irqlock, flags);

	ret = mtk_vcodec_enc_pw_on(&ctx->dev->pm);
	if (ret)
		goto venc_if_encode_pw_on_err;
	mtk_vcodec_enc_clock_on(&ctx->dev->pm);
	ret = ctx->enc_if->encode(ctx->drv_handle, opt, frm_buf,
				  bs_buf, result);
	mtk_vcodec_enc_clock_off(&ctx->dev->pm);
	mtk_vcodec_enc_pw_off(&ctx->dev->pm);

	spin_lock_irqsave(&ctx->dev->irqlock, flags);
	ctx->dev->curr_ctx = NULL;
	spin_unlock_irqrestore(&ctx->dev->irqlock, flags);

venc_if_encode_pw_on_err:
	mtk_venc_unlock(ctx);
	return ret;
}

int venc_if_deinit(struct mtk_vcodec_enc_ctx *ctx)
{
	int ret = 0;

	if (!ctx->drv_handle)
		return 0;

Annotation

Implementation Notes