[PATCH 3/3] vcodec: mediatek: Add probe-defer for MTK IOMMU and SMI
From: yong.wu@mediatek.com (Yong Wu)
Date: 2016-07-20 03:02:44
Also in:
linux-iommu, linux-mediatek, lkml
Subsystem:
media input infrastructure (v4l/dvb), the rest · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds
Mediatek V4l2 depend on the IOMMU and SMI. we should add probe-defer to wait for the IOMMU and SMI is ready. Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
index 4c977b2..9e6203e 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c@@ -66,6 +66,11 @@ int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev) pdev = mtkdev->plat_dev; pm->dev = &pdev->dev; + /* Wait until MTK IOMMU and SMI probe done.*/ + if (!mtk_smi_larb_is_ready(pm->larbvenc) || + !mtk_smi_larb_is_ready(pm->larbvenclt)) + return -EPROBE_DEFER; + pm->vencpll_d2 = devm_clk_get(&pdev->dev, "venc_sel_src"); if (IS_ERR(pm->vencpll_d2)) { mtk_v4l2_err("devm_clk_get vencpll_d2 fail");
--
1.8.1.1.dirty