drivers/media/platform/mediatek/vcodec/decoder/vdec_drv_if.c

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

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/mediatek/vcodec/decoder/vdec_drv_if.c
Extension
.c
Size
3103 bytes
Lines
129
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

if (!ctx->dev->vdec_pdata->is_subdev_supported) {
			ctx->dec_if = &vdec_h264_slice_if;
			ctx->hw_id = MTK_VDEC_CORE;
		} else {
			ctx->dec_if = &vdec_h264_slice_multi_if;
			ctx->hw_id = IS_VDEC_LAT_ARCH(hw_arch) ? MTK_VDEC_LAT0 : MTK_VDEC_CORE;
		}
		break;
	case V4L2_PIX_FMT_H264:
		ctx->dec_if = &vdec_h264_if;
		ctx->hw_id = MTK_VDEC_CORE;
		break;
	case V4L2_PIX_FMT_VP8_FRAME:
		ctx->dec_if = &vdec_vp8_slice_if;
		ctx->hw_id = MTK_VDEC_CORE;
		break;
	case V4L2_PIX_FMT_VP8:
		ctx->dec_if = &vdec_vp8_if;
		ctx->hw_id = MTK_VDEC_CORE;
		break;
	case V4L2_PIX_FMT_VP9:
		ctx->dec_if = &vdec_vp9_if;
		ctx->hw_id = MTK_VDEC_CORE;
		break;
	case V4L2_PIX_FMT_VP9_FRAME:
		ctx->dec_if = &vdec_vp9_slice_lat_if;
		ctx->hw_id = IS_VDEC_LAT_ARCH(hw_arch) ? MTK_VDEC_LAT0 : MTK_VDEC_CORE;
		break;
	case V4L2_PIX_FMT_HEVC_SLICE:
		ctx->dec_if = &vdec_hevc_slice_multi_if;
		ctx->hw_id = MTK_VDEC_LAT0;
		break;
	case V4L2_PIX_FMT_AV1_FRAME:
		ctx->dec_if = &vdec_av1_slice_lat_if;
		ctx->hw_id = MTK_VDEC_LAT0;
		break;
	default:
		return -EINVAL;
	}

	mtk_vcodec_dec_enable_hardware(ctx, ctx->hw_id);
	ret = ctx->dec_if->init(ctx);
	mtk_vcodec_dec_disable_hardware(ctx, ctx->hw_id);

	return ret;
}

int vdec_if_decode(struct mtk_vcodec_dec_ctx *ctx, struct mtk_vcodec_mem *bs,
		   struct vdec_fb *fb, bool *res_chg)
{
	int ret = 0;

	if (bs) {
		if ((bs->dma_addr & 63) != 0) {
			mtk_v4l2_vdec_err(ctx, "bs dma_addr should 64 byte align");
			return -EINVAL;
		}
	}

	if (fb) {
		if (((fb->base_y.dma_addr & 511) != 0) ||
		    ((fb->base_c.dma_addr & 511) != 0)) {
			mtk_v4l2_vdec_err(ctx, "frame buffer dma_addr should 512 byte align");
			return -EINVAL;
		}
	}

	if (!ctx->drv_handle)
		return -EIO;

	mtk_vcodec_dec_enable_hardware(ctx, ctx->hw_id);
	mtk_vcodec_set_curr_ctx(ctx->dev, ctx, ctx->hw_id);
	ret = ctx->dec_if->decode(ctx->drv_handle, bs, fb, res_chg);
	mtk_vcodec_set_curr_ctx(ctx->dev, NULL, ctx->hw_id);
	mtk_vcodec_dec_disable_hardware(ctx, ctx->hw_id);

	return ret;
}

int vdec_if_get_param(struct mtk_vcodec_dec_ctx *ctx, enum vdec_get_param_type type,
		      void *out)
{
	int ret = 0;

	if (!ctx->drv_handle)
		return -EIO;

	mtk_vdec_lock(ctx);
	ret = ctx->dec_if->get_param(ctx->drv_handle, type, out);
	mtk_vdec_unlock(ctx);

Annotation

Implementation Notes