Patch "media: mediatek: vcodec: add encoder power management helper functions" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    media: mediatek: vcodec: add encoder power management helper functions

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-mediatek-vcodec-add-encoder-power-management-h.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 5e4ce15647987fa953c6045b86260710fecc9ace
Author: Irui Wang <irui.wang@xxxxxxxxxxxx>
Date:   Mon Sep 25 12:02:00 2023 +0800

    media: mediatek: vcodec: add encoder power management helper functions
    
    [ Upstream commit 3568cb6556695af163e930a75b1ed8f6dfa848ba ]
    
    Remove PM functions at start/stop streaming, add PM helper functions
    to get PM before encoding frame start and put PM after encoding frame
    done. Meanwhile, remove unnecessary clock operations.
    
    Signed-off-by: Irui Wang <irui.wang@xxxxxxxxxxxx>
    Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
    Stable-dep-of: c28d4921a1e3 ("media: mediatek: vcodec: fix possible unbalanced PM counter")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c
index 04948d3eb011a..eb381fa6e7d14 100644
--- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c
+++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc.c
@@ -866,7 +866,7 @@ static int vb2ops_venc_start_streaming(struct vb2_queue *q, unsigned int count)
 {
 	struct mtk_vcodec_enc_ctx *ctx = vb2_get_drv_priv(q);
 	struct venc_enc_param param;
-	int ret, pm_ret;
+	int ret;
 	int i;
 
 	/* Once state turn into MTK_STATE_ABORT, we need stop_streaming
@@ -886,18 +886,12 @@ static int vb2ops_venc_start_streaming(struct vb2_queue *q, unsigned int count)
 			return 0;
 	}
 
-	ret = pm_runtime_resume_and_get(&ctx->dev->plat_dev->dev);
-	if (ret < 0) {
-		mtk_v4l2_venc_err(ctx, "pm_runtime_resume_and_get fail %d", ret);
-		goto err_start_stream;
-	}
-
 	mtk_venc_set_param(ctx, &param);
 	ret = venc_if_set_param(ctx, VENC_SET_PARAM_ENC, &param);
 	if (ret) {
 		mtk_v4l2_venc_err(ctx, "venc_if_set_param failed=%d", ret);
 		ctx->state = MTK_STATE_ABORT;
-		goto err_set_param;
+		goto err_start_stream;
 	}
 	ctx->param_change = MTK_ENCODE_PARAM_NONE;
 
@@ -910,18 +904,13 @@ static int vb2ops_venc_start_streaming(struct vb2_queue *q, unsigned int count)
 		if (ret) {
 			mtk_v4l2_venc_err(ctx, "venc_if_set_param failed=%d", ret);
 			ctx->state = MTK_STATE_ABORT;
-			goto err_set_param;
+			goto err_start_stream;
 		}
 		ctx->state = MTK_STATE_HEADER;
 	}
 
 	return 0;
 
-err_set_param:
-	pm_ret = pm_runtime_put(&ctx->dev->plat_dev->dev);
-	if (pm_ret < 0)
-		mtk_v4l2_venc_err(ctx, "pm_runtime_put fail %d", pm_ret);
-
 err_start_stream:
 	for (i = 0; i < q->num_buffers; ++i) {
 		struct vb2_buffer *buf = vb2_get_buffer(q, i);
@@ -1004,10 +993,6 @@ static void vb2ops_venc_stop_streaming(struct vb2_queue *q)
 	if (ret)
 		mtk_v4l2_venc_err(ctx, "venc_if_deinit failed=%d", ret);
 
-	ret = pm_runtime_put(&ctx->dev->plat_dev->dev);
-	if (ret < 0)
-		mtk_v4l2_venc_err(ctx, "pm_runtime_put fail %d", ret);
-
 	ctx->state = MTK_STATE_FREE;
 }
 
diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c
index 3fce936e61b9f..a22b7dfc656e1 100644
--- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c
+++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c
@@ -58,6 +58,24 @@ int mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev *mtkdev)
 	return 0;
 }
 
+void 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);
+}
+
+void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm)
+{
+	int ret;
+
+	ret = pm_runtime_put(pm->dev);
+	if (ret && ret != -EAGAIN)
+		dev_err(pm->dev, "pm_runtime_put fail %d", ret);
+}
+
 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
 {
 	struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.h b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.h
index e50be0575190a..157ea08ba9e36 100644
--- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.h
+++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.h
@@ -10,7 +10,8 @@
 #include "mtk_vcodec_enc_drv.h"
 
 int mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev *dev);
-
+void mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm);
+void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm);
 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm);
 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm);
 
diff --git a/drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c b/drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c
index 1bdaecdd64a79..c402a686f3cb2 100644
--- a/drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c
+++ b/drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c
@@ -32,9 +32,7 @@ int venc_if_init(struct mtk_vcodec_enc_ctx *ctx, unsigned int fourcc)
 	}
 
 	mtk_venc_lock(ctx);
-	mtk_vcodec_enc_clock_on(&ctx->dev->pm);
 	ret = ctx->enc_if->init(ctx);
-	mtk_vcodec_enc_clock_off(&ctx->dev->pm);
 	mtk_venc_unlock(ctx);
 
 	return ret;
@@ -46,9 +44,7 @@ int venc_if_set_param(struct mtk_vcodec_enc_ctx *ctx,
 	int ret = 0;
 
 	mtk_venc_lock(ctx);
-	mtk_vcodec_enc_clock_on(&ctx->dev->pm);
 	ret = ctx->enc_if->set_param(ctx->drv_handle, type, in);
-	mtk_vcodec_enc_clock_off(&ctx->dev->pm);
 	mtk_venc_unlock(ctx);
 
 	return ret;
@@ -68,10 +64,12 @@ int venc_if_encode(struct mtk_vcodec_enc_ctx *ctx,
 	ctx->dev->curr_ctx = ctx;
 	spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
 
+	mtk_vcodec_enc_pw_on(&ctx->dev->pm);
 	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;
@@ -89,9 +87,7 @@ int venc_if_deinit(struct mtk_vcodec_enc_ctx *ctx)
 		return 0;
 
 	mtk_venc_lock(ctx);
-	mtk_vcodec_enc_clock_on(&ctx->dev->pm);
 	ret = ctx->enc_if->deinit(ctx->drv_handle);
-	mtk_vcodec_enc_clock_off(&ctx->dev->pm);
 	mtk_venc_unlock(ctx);
 
 	ctx->drv_handle = NULL;




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