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Message-Id: <20250802-media-private-data-v1-1-eb140ddd6a9d@ideasonboard.com>
Date: Sat, 02 Aug 2025 11:22:23 +0200
From: Jacopo Mondi <jacopo.mondi@...asonboard.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
Devarsh Thakkar <devarsht@...com>, Benoit Parrot <bparrot@...com>,
Hans Verkuil <hverkuil@...nel.org>, Mike Isely <isely@...ox.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hans de Goede <hansg@...nel.org>,
Parthiban Veerasooran <parthiban.veerasooran@...rochip.com>,
Christian Gromm <christian.gromm@...rochip.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alex Shi <alexs@...nel.org>, Yanteng Si <si.yanteng@...ux.dev>,
Dongliang Mu <dzm91@...t.edu.cn>, Jonathan Corbet <corbet@....net>,
Tomasz Figa <tfiga@...omium.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Andy Walls <awalls@...metrocast.net>,
Michael Tretter <m.tretter@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Bin Liu <bin.liu@...iatek.com>, Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Dmitry Osipenko <digetx@...il.com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Mirela Rabulea <mirela.rabulea@....com>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Michal Simek <michal.simek@....com>, Ming Qian <ming.qian@....com>,
Zhou Peng <eagle.zhou@....com>,
Xavier Roumegue <xavier.roumegue@....nxp.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Vikash Garodia <quic_vgarodia@...cinc.com>,
Dikshita Agarwal <quic_dikshita@...cinc.com>,
Abhinav Kumar <abhinav.kumar@...ux.dev>,
Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
Jernej Skrabec <jernej.skrabec@...il.com>, Chen-Yu Tsai <wens@...e.org>,
Samuel Holland <samuel@...lland.org>,
Daniel Almeida <daniel.almeida@...labora.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Nas Chung <nas.chung@...psnmedia.com>,
Jackson Lee <jackson.lee@...psnmedia.com>,
Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
Houlong Wei <houlong.wei@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Yunfei Dong <yunfei.dong@...iatek.com>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>,
Mikhail Ulyanov <mikhail.ulyanov@...entembedded.com>,
Jacob Chen <jacob-chen@...wrt.com>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Heiko Stuebner <heiko@...ech.de>,
Detlev Casanova <detlev.casanova@...labora.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Łukasz Stelmach <l.stelmach@...sung.com>,
Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
Jacek Anaszewski <jacek.anaszewski@...il.com>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Fabien Dessenne <fabien.dessenne@...s.st.com>,
Hugues Fruchet <hugues.fruchet@...s.st.com>,
Jean-Christophe Trotin <jean-christophe.trotin@...s.st.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Nicolas Dufresne <nicolas.dufresne@...labora.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>,
Steve Longerbeam <slongerbeam@...il.com>,
Maxime Ripard <mripard@...nel.org>, Paul Kocialkowski <paulk@...-base.io>,
Niklas Söderlund <niklas.soderlund@...natech.se>,
Robert Foss <rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>,
Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
Corentin Labbe <clabbe@...libre.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Bingbu Cao <bingbu.cao@...el.com>, Tianshu Qiu <tian.shu.qiu@...el.com>,
Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-staging@...ts.linux.dev, linux-doc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
linux-tegra@...r.kernel.org, imx@...ts.linux.dev,
linux-renesas-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, linux-sunxi@...ts.linux.dev,
linux-usb@...r.kernel.org, linux-amlogic@...ts.infradead.org,
linux-rockchip@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com, mjpeg-users@...ts.sourceforge.net,
Jacopo Mondi <jacopo.mondi@...asonboard.com>
Subject: [PATCH 01/65] media: pci: saa7164: Store v4l2_fh pointer in
file->private_data
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Most V4L2 drivers store the v4l2_fh pointer in file->private_data. The
saa7164 instead stores the pointer to the driver-specific structure that
embeds the v4l2_fh. Switch to storing the v4l2_fh pointer itself to
standardize behaviour across drivers. This also prepares for future
refactoring that depends on v4l2_fh being stored in private_data.
This also fixes a bug in the vidioc_g_std() in saa7164-vbi.c that casts
the private_data void pointer to a saa7164_encoder_fh instead of a
saa7164_vbi_fh. The bug has no practical consequence as the two
structures are identical.
Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>
---
drivers/media/pci/saa7164/saa7164-encoder.c | 27 +++++++++++++--------------
drivers/media/pci/saa7164/saa7164-vbi.c | 22 +++++++++++-----------
drivers/media/pci/saa7164/saa7164.h | 10 ++++++++++
3 files changed, 34 insertions(+), 25 deletions(-)
diff --git a/drivers/media/pci/saa7164/saa7164-encoder.c b/drivers/media/pci/saa7164/saa7164-encoder.c
index bf73e9e83f52324ca494816f7d9fa2fae7de6774..296f50b6b8d38e0ab617f0990d8f697ba96b0016 100644
--- a/drivers/media/pci/saa7164/saa7164-encoder.c
+++ b/drivers/media/pci/saa7164/saa7164-encoder.c
@@ -219,7 +219,7 @@ int saa7164_s_std(struct saa7164_port *port, v4l2_std_id id)
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_s_std(fh->port, id);
}
@@ -232,7 +232,7 @@ int saa7164_g_std(struct saa7164_port *port, v4l2_std_id *id)
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_g_std(fh->port, id);
}
@@ -277,7 +277,7 @@ int saa7164_g_input(struct saa7164_port *port, unsigned int *i)
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_g_input(fh->port, i);
}
@@ -301,14 +301,14 @@ int saa7164_s_input(struct saa7164_port *port, unsigned int i)
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_s_input(fh->port, i);
}
int saa7164_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
@@ -347,7 +347,7 @@ int saa7164_g_frequency(struct saa7164_port *port, struct v4l2_frequency *f)
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_g_frequency(fh->port, f);
}
@@ -400,7 +400,7 @@ int saa7164_s_frequency(struct saa7164_port *port,
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
return saa7164_s_frequency(fh->port, f);
}
@@ -483,7 +483,7 @@ static int saa7164_s_ctrl(struct v4l2_ctrl *ctrl)
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
@@ -510,7 +510,7 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
static int vidioc_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
@@ -726,14 +726,14 @@ static int fops_open(struct file *file)
fh->port = port;
v4l2_fh_init(&fh->fh, video_devdata(file));
v4l2_fh_add(&fh->fh);
- file->private_data = fh;
+ file->private_data = &fh->fh;
return 0;
}
static int fops_release(struct file *file)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
@@ -787,7 +787,7 @@ saa7164_user_buffer *saa7164_enc_next_buf(struct saa7164_port *port)
static ssize_t fops_read(struct file *file, char __user *buffer,
size_t count, loff_t *pos)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_user_buffer *ubuf = NULL;
struct saa7164_dev *dev = port->dev;
@@ -893,8 +893,7 @@ static ssize_t fops_read(struct file *file, char __user *buffer,
static __poll_t fops_poll(struct file *file, poll_table *wait)
{
__poll_t req_events = poll_requested_events(wait);
- struct saa7164_encoder_fh *fh =
- (struct saa7164_encoder_fh *)file->private_data;
+ struct saa7164_encoder_fh *fh = to_saa7164_encoder_fh(file);
struct saa7164_port *port = fh->port;
__poll_t mask = v4l2_ctrl_poll(file, wait);
diff --git a/drivers/media/pci/saa7164/saa7164-vbi.c b/drivers/media/pci/saa7164/saa7164-vbi.c
index ac958a5fca78e5094d7befd8c125fa4233bb6999..a7e398f304725c7fa5aa4cf1edf0deb0df059641 100644
--- a/drivers/media/pci/saa7164/saa7164-vbi.c
+++ b/drivers/media/pci/saa7164/saa7164-vbi.c
@@ -144,28 +144,28 @@ static int saa7164_vbi_initialize(struct saa7164_port *port)
/* -- V4L2 --------------------------------------------------------- */
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
return saa7164_s_std(fh->port->enc_port, id);
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
- struct saa7164_encoder_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
return saa7164_g_std(fh->port->enc_port, id);
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
return saa7164_g_input(fh->port->enc_port, i);
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
return saa7164_s_input(fh->port->enc_port, i);
}
@@ -173,7 +173,7 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
return saa7164_g_frequency(fh->port->enc_port, f);
}
@@ -181,7 +181,7 @@ static int vidioc_g_frequency(struct file *file, void *priv,
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
int ret = saa7164_s_frequency(fh->port->enc_port, f);
if (ret == 0)
@@ -192,7 +192,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
@@ -429,14 +429,14 @@ static int fops_open(struct file *file)
fh->port = port;
v4l2_fh_init(&fh->fh, video_devdata(file));
v4l2_fh_add(&fh->fh);
- file->private_data = fh;
+ file->private_data = &fh->fh;
return 0;
}
static int fops_release(struct file *file)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
@@ -489,7 +489,7 @@ saa7164_user_buffer *saa7164_vbi_next_buf(struct saa7164_port *port)
static ssize_t fops_read(struct file *file, char __user *buffer,
size_t count, loff_t *pos)
{
- struct saa7164_vbi_fh *fh = file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
struct saa7164_port *port = fh->port;
struct saa7164_user_buffer *ubuf = NULL;
struct saa7164_dev *dev = port->dev;
@@ -596,7 +596,7 @@ static ssize_t fops_read(struct file *file, char __user *buffer,
static __poll_t fops_poll(struct file *file, poll_table *wait)
{
- struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data;
+ struct saa7164_vbi_fh *fh = to_saa7164_vbi_fh(file);
struct saa7164_port *port = fh->port;
__poll_t mask = 0;
diff --git a/drivers/media/pci/saa7164/saa7164.h b/drivers/media/pci/saa7164/saa7164.h
index e1bac1fe19d3098792b2051b537857e3f13054d5..7b511f7f1cfc305a9ffe60722b9ebe093163787d 100644
--- a/drivers/media/pci/saa7164/saa7164.h
+++ b/drivers/media/pci/saa7164/saa7164.h
@@ -180,12 +180,22 @@ struct saa7164_encoder_fh {
atomic_t v4l_reading;
};
+static inline struct saa7164_encoder_fh *to_saa7164_encoder_fh(struct file *filp)
+{
+ return container_of(filp->private_data, struct saa7164_encoder_fh, fh);
+}
+
struct saa7164_vbi_fh {
struct v4l2_fh fh;
struct saa7164_port *port;
atomic_t v4l_reading;
};
+static inline struct saa7164_vbi_fh *to_saa7164_vbi_fh(struct file *filp)
+{
+ return container_of(filp->private_data, struct saa7164_vbi_fh, fh);
+}
+
struct saa7164_histogram_bucket {
u32 val;
u32 count;
--
2.49.0
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