linux-kernel - [PATCH v1 1/4] media: camss: vfe: Don't read hardware version needlessly

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Date:   Mon, 26 Jul 2021 10:01:10 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     robert.foss@...aro.org, todor.too@...il.com, agross@...nel.org,
        bjorn.andersson@...aro.org, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andrey.konovalov@...aro.org>,
        AngeloGioacchino Del Regno <kholk11@...il.com>
Subject: [PATCH v1 1/4] media: camss: vfe: Don't read hardware version needlessly

vfe_set_power() is invoced a few times, which causes a lot of
VFE HW version prints.

Secondly there is no real reason for calling hw_version_read() from
this location specifically, since it does nothing more than print
the VFE HW version.

A better location for the hw_version_read() call would be somewhere
which is only executed once per VFE unit.

Signed-off-by: Robert Foss <robert.foss@...aro.org>
---
 drivers/media/platform/qcom/camss/camss-vfe.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index e0f3a36f3f3f..f6e889c1598e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -713,8 +713,6 @@ static int vfe_set_power(struct v4l2_subdev *sd, int on)
 		ret = vfe_get(vfe);
 		if (ret < 0)
 			return ret;
-
-		vfe->ops->hw_version_read(vfe, vfe->camss->dev);
 	} else {
 		vfe_put(vfe);
 	}
@@ -1301,6 +1299,7 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 		return -EINVAL;
 	}
 	vfe->ops->subdev_init(dev, vfe);
+	vfe->ops->hw_version_read(vfe, dev);
 
 	/* Memory */
 
-- 
2.29.2