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Message-ID: <20231125182057.1379357-5-alain.volmat@foss.st.com>
Date: Sat, 25 Nov 2023 19:20:52 +0100
From: Alain Volmat <alain.volmat@...s.st.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
Sylvain Petinot <sylvain.petinot@...s.st.com>
CC: Sakari Ailus <sakari.ailus@...ux.intel.com>,
Alain Volmat <alain.volmat@...s.st.com>,
<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/7] media: i2c: st-mipid02: use active state to store pad formats
Store formats information within pad allowing to simplify further more
the driver (mutex / format store within the driver structure no more
necessary).
Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
drivers/media/i2c/st-mipid02.c | 206 ++++++++++++---------------------
1 file changed, 75 insertions(+), 131 deletions(-)
diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
index 15f6c9e8b7f1..7af209905d7b 100644
--- a/drivers/media/i2c/st-mipid02.c
+++ b/drivers/media/i2c/st-mipid02.c
@@ -112,9 +112,6 @@ struct mipid02_dev {
u8 pix_width_ctrl;
u8 pix_width_ctrl_emb;
} r;
- /* lock to protect all members below */
- struct mutex lock;
- struct v4l2_mbus_framefmt fmt;
};
static int bpp_from_code(__u32 code)
@@ -192,18 +189,6 @@ static u8 data_type_from_code(__u32 code)
}
}
-static void init_format(struct v4l2_mbus_framefmt *fmt)
-{
- fmt->code = MEDIA_BUS_FMT_SBGGR8_1X8;
- fmt->field = V4L2_FIELD_NONE;
- fmt->colorspace = V4L2_COLORSPACE_SRGB;
- fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SRGB);
- fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
- fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SRGB);
- fmt->width = 640;
- fmt->height = 480;
-}
-
static __u32 get_fmt_code(__u32 code)
{
unsigned int i;
@@ -317,12 +302,13 @@ static int mipid02_detect(struct mipid02_dev *bridge)
* will be retrieve from connected device via v4l2_get_link_freq, bit per pixel
* and number of lanes.
*/
-static int mipid02_configure_from_rx_speed(struct mipid02_dev *bridge)
+static int mipid02_configure_from_rx_speed(struct mipid02_dev *bridge,
+ struct v4l2_mbus_framefmt *fmt)
{
struct i2c_client *client = bridge->i2c_client;
struct v4l2_subdev *subdev = bridge->s_subdev;
struct v4l2_fwnode_endpoint *ep = &bridge->rx;
- u32 bpp = bpp_from_code(bridge->fmt.code);
+ u32 bpp = bpp_from_code(fmt->code);
/*
* clk_lane_reg1 requires 4 times the unit interval time, and bitrate
* is twice the link frequency, hence ui_4 = 1000000000 * 4 / 2
@@ -394,7 +380,8 @@ static int mipid02_configure_data1_lane(struct mipid02_dev *bridge, int nb,
return 0;
}
-static int mipid02_configure_from_rx(struct mipid02_dev *bridge)
+static int mipid02_configure_from_rx(struct mipid02_dev *bridge,
+ struct v4l2_mbus_framefmt *fmt)
{
struct v4l2_fwnode_endpoint *ep = &bridge->rx;
bool are_lanes_swap = ep->bus.mipi_csi2.data_lanes[0] == 2;
@@ -419,7 +406,7 @@ static int mipid02_configure_from_rx(struct mipid02_dev *bridge)
bridge->r.mode_reg1 |= are_lanes_swap ? MODE_DATA_SWAP : 0;
bridge->r.mode_reg1 |= (nb - 1) << 1;
- return mipid02_configure_from_rx_speed(bridge);
+ return mipid02_configure_from_rx_speed(bridge, fmt);
}
static int mipid02_configure_from_tx(struct mipid02_dev *bridge)
@@ -439,16 +426,17 @@ static int mipid02_configure_from_tx(struct mipid02_dev *bridge)
return 0;
}
-static int mipid02_configure_from_code(struct mipid02_dev *bridge)
+static int mipid02_configure_from_code(struct mipid02_dev *bridge,
+ struct v4l2_mbus_framefmt *fmt)
{
u8 data_type;
bridge->r.data_id_rreg = 0;
- if (bridge->fmt.code != MEDIA_BUS_FMT_JPEG_1X8) {
+ if (fmt->code != MEDIA_BUS_FMT_JPEG_1X8) {
bridge->r.data_selection_ctrl |= SELECTION_MANUAL_DATA;
- data_type = data_type_from_code(bridge->fmt.code);
+ data_type = data_type_from_code(fmt->code);
if (!data_type)
return -EINVAL;
bridge->r.data_id_rreg = data_type;
@@ -485,23 +473,31 @@ static int mipid02_stream_disable(struct mipid02_dev *bridge)
static int mipid02_stream_enable(struct mipid02_dev *bridge)
{
struct i2c_client *client = bridge->i2c_client;
+ struct v4l2_subdev_state *state;
+ struct v4l2_mbus_framefmt *fmt;
int ret = -EINVAL;
if (!bridge->s_subdev)
goto error;
memset(&bridge->r, 0, sizeof(bridge->r));
+
+ state = v4l2_subdev_lock_and_get_active_state(&bridge->sd);
+ fmt = v4l2_subdev_state_get_format(state, MIPID02_SINK_0);
+
/* build registers content */
- ret = mipid02_configure_from_rx(bridge);
+ ret = mipid02_configure_from_rx(bridge, fmt);
if (ret)
goto error;
ret = mipid02_configure_from_tx(bridge);
if (ret)
goto error;
- ret = mipid02_configure_from_code(bridge);
+ ret = mipid02_configure_from_code(bridge, fmt);
if (ret)
goto error;
+ v4l2_subdev_unlock_state(state);
+
/* write mipi registers */
cci_write(bridge->regmap, MIPID02_CLK_LANE_REG1,
bridge->r.clk_lane_reg1, &ret);
@@ -556,11 +552,32 @@ static int mipid02_s_stream(struct v4l2_subdev *sd, int enable)
return ret;
}
+static const struct v4l2_mbus_framefmt default_fmt = {
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
+ .quantization = V4L2_QUANTIZATION_FULL_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_DEFAULT,
+ .width = 640,
+ .height = 480,
+};
+
+static int mipid02_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ *v4l2_subdev_state_get_format(state, MIPID02_SINK_0) = default_fmt;
+ /* MIPID02_SINK_1 isn't supported yet */
+ *v4l2_subdev_state_get_format(state, MIPID02_SOURCE) = default_fmt;
+
+ return 0;
+}
+
static int mipid02_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
- struct mipid02_dev *bridge = to_mipid02_dev(sd);
+ struct v4l2_mbus_framefmt *sink_fmt;
int ret = 0;
switch (code->pad) {
@@ -571,10 +588,13 @@ static int mipid02_enum_mbus_code(struct v4l2_subdev *sd,
code->code = mipid02_supported_fmt_codes[code->index];
break;
case MIPID02_SOURCE:
- if (code->index == 0)
- code->code = serial_to_parallel_code(bridge->fmt.code);
- else
+ if (code->index == 0) {
+ sink_fmt = v4l2_subdev_state_get_format(sd_state,
+ MIPID02_SINK_0);
+ code->code = serial_to_parallel_code(sink_fmt->code);
+ } else {
ret = -EINVAL;
+ }
break;
default:
ret = -EINVAL;
@@ -583,113 +603,36 @@ static int mipid02_enum_mbus_code(struct v4l2_subdev *sd,
return ret;
}
-static int mipid02_get_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
- struct mipid02_dev *bridge = to_mipid02_dev(sd);
- struct i2c_client *client = bridge->i2c_client;
- struct v4l2_mbus_framefmt *fmt;
-
- dev_dbg(&client->dev, "%s probe %d", __func__, format->pad);
-
- if (format->pad >= MIPID02_PAD_NB)
- return -EINVAL;
- /* second CSI-2 pad not yet supported */
- if (format->pad == MIPID02_SINK_1)
- return -EINVAL;
-
- if (format->which == V4L2_SUBDEV_FORMAT_TRY)
- fmt = v4l2_subdev_state_get_format(sd_state, format->pad);
- else
- fmt = &bridge->fmt;
-
- mutex_lock(&bridge->lock);
-
- *mbus_fmt = *fmt;
- /* code may need to be converted for source */
- if (format->pad == MIPID02_SOURCE)
- mbus_fmt->code = serial_to_parallel_code(mbus_fmt->code);
-
- mutex_unlock(&bridge->lock);
-
- return 0;
-}
-
-static void mipid02_set_fmt_source(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct mipid02_dev *bridge = to_mipid02_dev(sd);
-
- /* source pad mirror sink pad */
- if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
- format->format = bridge->fmt;
- else
- format->format = *v4l2_subdev_state_get_format(sd_state,
- MIPID02_SINK_0);
-
- /* but code may need to be converted */
- format->format.code = serial_to_parallel_code(format->format.code);
-
- /* only apply format for V4L2_SUBDEV_FORMAT_TRY case */
- if (format->which != V4L2_SUBDEV_FORMAT_TRY)
- return;
-
- *v4l2_subdev_state_get_format(sd_state, MIPID02_SOURCE) =
- format->format;
-}
-
-static void mipid02_set_fmt_sink(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct mipid02_dev *bridge = to_mipid02_dev(sd);
- struct v4l2_subdev_format source_fmt;
- struct v4l2_mbus_framefmt *fmt;
-
- format->format.code = get_fmt_code(format->format.code);
-
- if (format->which == V4L2_SUBDEV_FORMAT_TRY)
- fmt = v4l2_subdev_state_get_format(sd_state, format->pad);
- else
- fmt = &bridge->fmt;
-
- *fmt = format->format;
-
- /*
- * Propagate the format change to the source pad, taking
- * care not to update the format pointer given back to user
- */
- source_fmt = *format;
- mipid02_set_fmt_source(sd, sd_state, &source_fmt);
-}
-
static int mipid02_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
+ struct v4l2_subdev_format *fmt)
{
struct mipid02_dev *bridge = to_mipid02_dev(sd);
struct i2c_client *client = bridge->i2c_client;
- int ret = 0;
+ struct v4l2_mbus_framefmt *pad_fmt;
- dev_dbg(&client->dev, "%s for %d", __func__, format->pad);
+ dev_dbg(&client->dev, "%s for %d", __func__, fmt->pad);
- if (format->pad >= MIPID02_PAD_NB)
- return -EINVAL;
/* second CSI-2 pad not yet supported */
- if (format->pad == MIPID02_SINK_1)
+ if (fmt->pad == MIPID02_SINK_1)
return -EINVAL;
- mutex_lock(&bridge->lock);
+ pad_fmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
+ fmt->format.code = get_fmt_code(fmt->format.code);
- if (format->pad == MIPID02_SOURCE)
- mipid02_set_fmt_source(sd, sd_state, format);
- else
- mipid02_set_fmt_sink(sd, sd_state, format);
+ /* code may need to be converted */
+ if (fmt->pad == MIPID02_SOURCE)
+ fmt->format.code = serial_to_parallel_code(fmt->format.code);
- mutex_unlock(&bridge->lock);
+ *pad_fmt = fmt->format;
+
+ /* Propagate the format to the source pad in case of sink pad update */
+ if (fmt->pad == MIPID02_SINK_0) {
+ pad_fmt = v4l2_subdev_state_get_format(sd_state,
+ MIPID02_SOURCE);
+ *pad_fmt = fmt->format;
+ pad_fmt->code = serial_to_parallel_code(fmt->format.code);
+ }
return 0;
}
@@ -699,8 +642,9 @@ static const struct v4l2_subdev_video_ops mipid02_video_ops = {
};
static const struct v4l2_subdev_pad_ops mipid02_pad_ops = {
+ .init_cfg = mipid02_init_cfg,
.enum_mbus_code = mipid02_enum_mbus_code,
- .get_fmt = mipid02_get_fmt,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = mipid02_set_fmt,
};
@@ -868,8 +812,6 @@ static int mipid02_probe(struct i2c_client *client)
if (!bridge)
return -ENOMEM;
- init_format(&bridge->fmt);
-
bridge->i2c_client = client;
v4l2_i2c_subdev_init(&bridge->sd, client, &mipid02_subdev_ops);
@@ -907,7 +849,6 @@ static int mipid02_probe(struct i2c_client *client)
return dev_err_probe(dev, PTR_ERR(bridge->regmap),
"failed to get cci regmap\n");
- mutex_init(&bridge->lock);
bridge->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
bridge->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
bridge->sd.entity.ops = &mipid02_subdev_entity_ops;
@@ -918,7 +859,13 @@ static int mipid02_probe(struct i2c_client *client)
bridge->pad);
if (ret) {
dev_err(&client->dev, "pads init failed %d", ret);
- goto mutex_cleanup;
+ return ret;
+ }
+
+ ret = v4l2_subdev_init_finalize(&bridge->sd);
+ if (ret < 0) {
+ dev_err(dev, "subdev init error: %d\n", ret);
+ goto entity_cleanup;
}
/* enable clock, power and reset device if available */
@@ -962,8 +909,6 @@ static int mipid02_probe(struct i2c_client *client)
mipid02_set_power_off(bridge);
entity_cleanup:
media_entity_cleanup(&bridge->sd.entity);
-mutex_cleanup:
- mutex_destroy(&bridge->lock);
return ret;
}
@@ -978,7 +923,6 @@ static void mipid02_remove(struct i2c_client *client)
v4l2_async_unregister_subdev(&bridge->sd);
mipid02_set_power_off(bridge);
media_entity_cleanup(&bridge->sd.entity);
- mutex_destroy(&bridge->lock);
}
static const struct of_device_id mipid02_dt_ids[] = {
--
2.25.1
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