Thread (13 messages) 13 messages, 4 authors, 2022-10-19

Re: [PATCH v6, 6/8] media: mediatek: vcodec: Refactor encoder clock on/off function

From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date: 2022-10-04 10:22:12
Also in: linux-devicetree, linux-media, linux-mediatek, lkml

On Sat, 1 Oct 2022, Irui Wang wrote:
quoted hunk ↗ jump to hunk
when enable multi-core encoding, encoder cores use their own clock,
refactor clock management functions with used encoder hardware id.

Signed-off-by: Irui Wang <redacted>
---
 .../mediatek/vcodec/mtk_vcodec_enc_pm.c       | 89 ++++++++++++++++---
 .../mediatek/vcodec/mtk_vcodec_enc_pm.h       |  6 +-
 .../platform/mediatek/vcodec/venc_drv_if.c    |  4 +-
 3 files changed, 84 insertions(+), 15 deletions(-)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_pm.c
index 213c3f50e9eb..2f83aade779a 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_pm.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_pm.c
@@ -60,7 +60,9 @@ EXPORT_SYMBOL_GPL(mtk_vcodec_init_enc_clk);
 static int mtk_enc_core_power_on(struct mtk_vcodec_ctx *ctx)
 {
 	struct mtk_venc_hw_dev *sub_core;
+	struct mtk_vcodec_clk *clk;
 	int ret, i;
+	int j = 0;
 
 	/* multi-core encoding need power on all available cores */
 	for (i = 0; i < MTK_VENC_HW_MAX; i++) {
@@ -73,12 +75,27 @@ static int mtk_enc_core_power_on(struct mtk_vcodec_ctx *ctx)
 			mtk_v4l2_err("power on sub_core[%d] fail %d", i, ret);
 			goto pm_on_fail;
 		}
+
+		clk = &sub_core->pm.venc_clk;
+		for (j = 0; j < clk->clk_num; j++) {
+			ret = clk_prepare(clk->clk_info[j].vcodec_clk);
+			if (ret) {
+				mtk_v4l2_err("prepare clk [%s] fail %d",
+					     clk->clk_info[j].clk_name, ret);
+				goto pm_on_fail;
+			}
+		}
 	}
 	return ret;
 
 pm_on_fail:
 	for (i -= 1; i >= 0; i--) {
 		sub_core = (struct mtk_venc_hw_dev *)ctx->dev->enc_hw_dev[i];
+
+		clk = &sub_core->pm.venc_clk;
+		for (j -= 1; j >= 0; j--)
+			clk_unprepare(clk->clk_info[j].vcodec_clk);
+
 		pm_runtime_put_sync(&sub_core->plat_dev->dev);
There's more than one thing wrong here.

pm_runtime_put_sync() won't be called for the ith entry when the later 
goto pm_on_fail is taken because the loop decrements i right at the 
start.

Similarly, i and j will mismatch for the ith entry because i was 
decremented.

Third, j does not start from clk->clk_num - 1 for the other entries 
(for those lower "i"s).


-- 
 i.


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