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

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

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c
Extension
.c
Size
2520 bytes
Lines
106
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 (ret) {
			dev_err(pm->dev, "[MTK VCODEC] venc failed to get clk name %d", i);
			return ret;
		}
		clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
			clk_info->clk_name);
		if (IS_ERR(clk_info->vcodec_clk)) {
			dev_err(pm->dev, "[MTK VCODEC] venc devm_clk_get (%d)%s fail", i,
				clk_info->clk_name);
			return PTR_ERR(clk_info->vcodec_clk);
		}
	}

	return 0;
}

int mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm)
{
	int ret;

	ret = pm_runtime_resume_and_get(pm->dev);
	if (ret)
		dev_err(pm->dev, "pm_runtime_resume_and_get fail: %d", ret);

	return ret;
}

void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm)
{
	pm_runtime_put(pm->dev);
}

void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
{
	struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
	int ret, i = 0;

	for (i = 0; i < enc_clk->clk_num; i++) {
		ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
		if (ret) {
			dev_err(pm->dev, "[MTK VCODEC] venc clk_prepare_enable %d %s fail %d", i,
				enc_clk->clk_info[i].clk_name, ret);
			goto clkerr;
		}
	}

	return;

clkerr:
	for (i -= 1; i >= 0; i--)
		clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
}

void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
{
	struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
	int i = 0;

	for (i = enc_clk->clk_num - 1; i >= 0; i--)
		clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
}

Annotation

Implementation Notes