linux-kernel - [PATCH v2 10/10] staging: media: zoran: introduce zoran_i2c

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Date:   Wed, 13 Oct 2021 18:58:12 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     mchehab@...nel.org, hverkuil@...all.nl, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, mjpeg-users@...ts.sourceforge.net,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH v2 10/10] staging: media: zoran: introduce zoran_i2c_init

Reduces the size of the probe function by adding zoran_i2c_init/zoran_i2c_exit
functions.

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/staging/media/zoran/zoran_card.c | 67 ++++++++++++++++++------
 1 file changed, 51 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/media/zoran/zoran_card.c b/drivers/staging/media/zoran/zoran_card.c
index 9bc5af34d909..fe4d867bf341 100644
--- a/drivers/staging/media/zoran/zoran_card.c
+++ b/drivers/staging/media/zoran/zoran_card.c
@@ -874,6 +874,53 @@ static int zoran_init_video_devices(struct zoran *zr)
 	return err;
 }
 
+/*
+ * v4l2_device_unregister() will care about removing zr->encoder/zr->decoder
+ * via v4l2_i2c_subdev_unregister()
+ */
+static int zoran_i2c_init(struct zoran *zr)
+{
+	int err;
+
+	pci_info(zr->pci_dev, "Initializing i2c bus...\n");
+
+	err = zoran_register_i2c(zr);
+	if (err) {
+		pci_err(zr->pci_dev, "%s - cannot initialize i2c bus\n", __func__);
+		return err;
+	}
+
+	zr->decoder = v4l2_i2c_new_subdev(&zr->v4l2_dev, &zr->i2c_adapter,
+					  zr->card.i2c_decoder, 0,
+					  zr->card.addrs_decoder);
+	if (!zr->decoder) {
+		pci_err(zr->pci_dev, "Fail to get decoder\n");
+		err = -EINVAL;
+		goto error_decoder;
+	}
+
+	if (zr->card.i2c_encoder) {
+		zr->encoder = v4l2_i2c_new_subdev(&zr->v4l2_dev, &zr->i2c_adapter,
+						  zr->card.i2c_encoder, 0,
+						  zr->card.addrs_encoder);
+		if (!zr->encoder) {
+			pci_err(zr->pci_dev, "Fail to get encoder\n");
+			err = -EINVAL;
+			goto error_decoder;
+		}
+	}
+	return 0;
+
+error_decoder:
+	zoran_unregister_i2c(zr);
+	return err;
+}
+
+static void zoran_i2c_exit(struct zoran *zr)
+{
+	zoran_unregister_i2c(zr);
+}
+
 void zoran_open_init_params(struct zoran *zr)
 {
 	int i;
@@ -1001,7 +1048,7 @@ static void zoran_remove(struct pci_dev *pdev)
 		videocodec_detach(zr->vfe);
 
 	/* unregister i2c bus */
-	zoran_unregister_i2c(zr);
+	zoran_i2c_exit(zr);
 	/* disable PCI bus-mastering */
 	zoran_set_pci_master(zr, 0);
 	/* put chip into reset */
@@ -1285,22 +1332,10 @@ static int zoran_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	zr36057_restart(zr);
-	/* i2c */
-	pci_info(zr->pci_dev, "Initializing i2c bus...\n");
 
-	if (zoran_register_i2c(zr) < 0) {
-		pci_err(pdev, "%s - can't initialize i2c bus\n", __func__);
+	err = zoran_i2c_init(zr);
+	if (err)
 		goto zr_free_irq;
-	}
-
-	zr->decoder = v4l2_i2c_new_subdev(&zr->v4l2_dev, &zr->i2c_adapter,
-					  zr->card.i2c_decoder, 0,
-					  zr->card.addrs_decoder);
-
-	if (zr->card.i2c_encoder)
-		zr->encoder = v4l2_i2c_new_subdev(&zr->v4l2_dev, &zr->i2c_adapter,
-						  zr->card.i2c_encoder, 0,
-						  zr->card.addrs_encoder);
 
 	pci_info(zr->pci_dev, "Initializing videocodec bus...\n");
 
@@ -1377,7 +1412,7 @@ static int zoran_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 zr_detach_codec:
 	videocodec_detach(zr->codec);
 zr_unreg_i2c:
-	zoran_unregister_i2c(zr);
+	zoran_i2c_exit(zr);
 zr_free_irq:
 	btwrite(0, ZR36057_SPGPPCR);
 	pci_free_irq(zr->pci_dev, 0, zr);
-- 
2.32.0