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Message-Id: <20220415152811.636419-9-paul.kocialkowski@bootlin.com>
Date: Fri, 15 Apr 2022 17:27:34 +0200
From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Cc: Yong Deng <yong.deng@...ewell.com>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Maxime Ripard <maxime@...no.tech>
Subject: [PATCH v4 08/45] media: sun6i-csi: Tidy up v4l2 code
Various cosmetic improvements to the v4l2 registration code, with
renames, lowerings, etc. The cleanup function is moved down after
setup. No functional change intended.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Reviewed-by: Maxime Ripard <maxime@...no.tech>
---
.../platform/sunxi/sun6i-csi/sun6i_csi.c | 118 ++++++++++--------
1 file changed, 68 insertions(+), 50 deletions(-)
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index dcc9e7a125e2..902a69cc27fe 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -27,6 +27,8 @@
#include "sun6i_csi.h"
#include "sun6i_csi_reg.h"
+/* Helpers */
+
/* TODO add 10&12 bit YUV, RGB support */
bool sun6i_csi_is_format_supported(struct sun6i_csi_device *csi_dev,
u32 pixformat, u32 mbus_code)
@@ -572,9 +574,8 @@ void sun6i_csi_set_stream(struct sun6i_csi_device *csi_dev, bool enable)
CSI_CAP_CH0_VCAP_ON);
}
-/* -----------------------------------------------------------------------------
- * Media Controller and V4L2
- */
+/* V4L2 */
+
static int sun6i_csi_link_entity(struct sun6i_csi_device *csi_dev,
struct media_entity *entity,
struct fwnode_handle *fwnode)
@@ -666,86 +667,103 @@ static int sun6i_csi_fwnode_parse(struct device *dev,
}
}
-static void sun6i_csi_v4l2_cleanup(struct sun6i_csi_device *csi_dev)
+static int sun6i_csi_v4l2_setup(struct sun6i_csi_device *csi_dev)
{
struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
+ struct media_device *media_dev = &v4l2->media_dev;
+ struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
+ struct v4l2_async_notifier *notifier = &v4l2->notifier;
+ struct device *dev = csi_dev->dev;
+ int ret;
- media_device_unregister(&v4l2->media_dev);
- v4l2_async_nf_unregister(&v4l2->notifier);
- v4l2_async_nf_cleanup(&v4l2->notifier);
- sun6i_video_cleanup(&csi_dev->video);
- v4l2_device_unregister(&v4l2->v4l2_dev);
- v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
- media_device_cleanup(&v4l2->media_dev);
-}
+ /* Media Device */
-static int sun6i_csi_v4l2_init(struct sun6i_csi_device *csi_dev)
-{
- struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
- int ret;
+ strscpy(media_dev->model, SUN6I_CSI_DESCRIPTION,
+ sizeof(media_dev->model));
+ snprintf(media_dev->bus_info, sizeof(media_dev->bus_info),
+ "platform:%s", dev_name(dev));
+ media_dev->hw_revision = 0;
+ media_dev->dev = dev;
- v4l2->media_dev.dev = csi_dev->dev;
- strscpy(v4l2->media_dev.model, SUN6I_CSI_DESCRIPTION,
- sizeof(v4l2->media_dev.model));
- v4l2->media_dev.hw_revision = 0;
- snprintf(v4l2->media_dev.bus_info,
- sizeof(v4l2->media_dev.bus_info), "platform:%s",
- dev_name(csi_dev->dev));
+ media_device_init(media_dev);
- media_device_init(&v4l2->media_dev);
- v4l2_async_nf_init(&v4l2->notifier);
+ /* V4L2 Control Handler */
ret = v4l2_ctrl_handler_init(&v4l2->ctrl_handler, 0);
if (ret) {
- dev_err(csi_dev->dev, "V4L2 controls handler init failed (%d)\n",
- ret);
- goto clean_media;
+ dev_err(dev, "failed to init v4l2 control handler: %d\n", ret);
+ goto error_media;
}
- v4l2->v4l2_dev.mdev = &v4l2->media_dev;
- v4l2->v4l2_dev.ctrl_handler = &v4l2->ctrl_handler;
- ret = v4l2_device_register(csi_dev->dev, &v4l2->v4l2_dev);
+ /* V4L2 Device */
+
+ v4l2_dev->mdev = media_dev;
+ v4l2_dev->ctrl_handler = &v4l2->ctrl_handler;
+
+ ret = v4l2_device_register(dev, v4l2_dev);
if (ret) {
- dev_err(csi_dev->dev, "V4L2 device registration failed (%d)\n",
- ret);
- goto free_ctrl;
+ dev_err(dev, "failed to register v4l2 device: %d\n", ret);
+ goto error_v4l2_ctrl;
}
+ /* Video */
+
ret = sun6i_video_init(&csi_dev->video, csi_dev, SUN6I_CSI_NAME);
if (ret)
- goto unreg_v4l2;
+ goto error_v4l2_device;
- ret = v4l2_async_nf_parse_fwnode_endpoints(csi_dev->dev,
- &v4l2->notifier,
+ /* V4L2 Async */
+
+ v4l2_async_nf_init(notifier);
+ notifier->ops = &sun6i_csi_async_ops;
+
+ ret = v4l2_async_nf_parse_fwnode_endpoints(dev, notifier,
sizeof(struct
v4l2_async_subdev),
sun6i_csi_fwnode_parse);
if (ret)
- goto clean_video;
-
- v4l2->notifier.ops = &sun6i_csi_async_ops;
+ goto error_video;
- ret = v4l2_async_nf_register(&v4l2->v4l2_dev, &v4l2->notifier);
+ ret = v4l2_async_nf_register(v4l2_dev, notifier);
if (ret) {
- dev_err(csi_dev->dev, "notifier registration failed\n");
- goto clean_video;
+ dev_err(dev, "failed to register v4l2 async notifier: %d\n",
+ ret);
+ goto error_v4l2_async_notifier;
}
return 0;
-clean_video:
+error_v4l2_async_notifier:
+ v4l2_async_nf_cleanup(notifier);
+
+error_video:
sun6i_video_cleanup(&csi_dev->video);
-unreg_v4l2:
+
+error_v4l2_device:
v4l2_device_unregister(&v4l2->v4l2_dev);
-free_ctrl:
+
+error_v4l2_ctrl:
v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
-clean_media:
- v4l2_async_nf_cleanup(&v4l2->notifier);
- media_device_cleanup(&v4l2->media_dev);
+
+error_media:
+ media_device_cleanup(media_dev);
return ret;
}
+static void sun6i_csi_v4l2_cleanup(struct sun6i_csi_device *csi_dev)
+{
+ struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
+
+ media_device_unregister(&v4l2->media_dev);
+ v4l2_async_nf_unregister(&v4l2->notifier);
+ v4l2_async_nf_cleanup(&v4l2->notifier);
+ sun6i_video_cleanup(&csi_dev->video);
+ v4l2_device_unregister(&v4l2->v4l2_dev);
+ v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
+ media_device_cleanup(&v4l2->media_dev);
+}
+
/* Platform */
static irqreturn_t sun6i_csi_interrupt(int irq, void *private)
@@ -942,7 +960,7 @@ static int sun6i_csi_probe(struct platform_device *platform_dev)
if (ret)
return ret;
- ret = sun6i_csi_v4l2_init(csi_dev);
+ ret = sun6i_csi_v4l2_setup(csi_dev);
if (ret)
goto error_resources;
--
2.35.2
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