linux-kernel - [PATCH 5.19 0462/1157] media: mediatek: vcodec: Initialize decoder parameters for each instance

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Date:   Mon, 15 Aug 2022 19:56:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chen-Yu Tsai <wenst@...omium.org>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0462/1157] media: mediatek: vcodec: Initialize decoder parameters for each instance

From: Chen-Yu Tsai <wenst@...omium.org>

[ Upstream commit fe3d651627d61210c6905339e5281d3b9db75033 ]

The decoder parameters are stored in each instance's context data. This
needs to be initialized per-instance, but a previous fix incorrectly
changed it to only be initialized for the first opened instance. This
resulted in subsequent instances not correctly signaling the requirement
for the Requests API.

Fix this by calling the initializing function outside of the
v4l2_fh_is_singular() conditional block.

Fixes: faddaa735c20 ("media: mediatek: vcodec: Initialize decoder parameters after getting dec_capability")
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Yunfei Dong <yunfei.dong@...iatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
index 99d7b15f2b9d..eed11a62febf 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
@@ -208,11 +208,12 @@ static int fops_vcodec_open(struct file *file)
 
 		dev->dec_capability =
 			mtk_vcodec_fw_get_vdec_capa(dev->fw_handler);
-		ctx->dev->vdec_pdata->init_vdec_params(ctx);
 
 		mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
 	}
 
+	ctx->dev->vdec_pdata->init_vdec_params(ctx);
+
 	list_add(&ctx->list, &dev->ctx_list);
 
 	mutex_unlock(&dev->dev_mutex);
-- 
2.35.1