Create the subdevice state with v4l2_subdev_init_finalize() and
implement the init_state() operation to guarantee the state is initialized.
Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
---
drivers/media/platform/renesas/rcar-csi2.c | 138 +++++++++++----------
1 file changed, 75 insertions(+), 63 deletions(-)
diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index 2d464e43a5be..4d4dfb59b025 100644
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -587,7 +587,8 @@ enum rcar_csi2_pads {
struct rcar_csi2_info {
int (*init_phtw)(struct rcar_csi2 *priv, unsigned int mbps);
int (*phy_post_init)(struct rcar_csi2 *priv);
- int (*start_receiver)(struct rcar_csi2 *priv);
+ int (*start_receiver)(struct rcar_csi2 *priv,
+ struct v4l2_subdev_state *state);
void (*enter_standby)(struct rcar_csi2 *priv);
const struct rcsi2_mbps_reg *hsfreqrange;
unsigned int csi0clkfreqrange;
@@ -613,8 +614,6 @@ struct rcar_csi2 {
int channel_vc[4];
- struct mutex lock; /* Protects mf and stream_count. */
- struct v4l2_mbus_framefmt mf;
int stream_count;
bool cphy;
@@ -808,20 +807,25 @@ static int rcsi2_get_active_lanes(struct rcar_csi2 *priv,
return 0;
}
-static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv)
+static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv,
+ struct v4l2_subdev_state *state)
{
const struct rcar_csi2_format *format;
u32 phycnt, vcdt = 0, vcdt2 = 0, fld = 0;
+ struct v4l2_mbus_framefmt *fmt;
unsigned int lanes;
unsigned int i;
int mbps, ret;
+ /* Use the format on the sink pad to compute the receiver config. */
+ fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
+
dev_dbg(priv->dev, "Input size (%ux%u%c)\n",
- priv->mf.width, priv->mf.height,
- priv->mf.field == V4L2_FIELD_NONE ? 'p' : 'i');
+ fmt->width, fmt->height,
+ fmt->field == V4L2_FIELD_NONE ? 'p' : 'i');
/* Code is validated in set_fmt. */
- format = rcsi2_code_to_fmt(priv->mf.code);
+ format = rcsi2_code_to_fmt(fmt->code);
if (!format)
return -EINVAL;
@@ -849,11 +853,11 @@ static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv)
vcdt2 |= vcdt_part << ((i % 2) * 16);
}
- if (priv->mf.field == V4L2_FIELD_ALTERNATE) {
+ if (fmt->field == V4L2_FIELD_ALTERNATE) {
fld = FLD_DET_SEL(1) | FLD_FLD_EN4 | FLD_FLD_EN3 | FLD_FLD_EN2
| FLD_FLD_EN;
- if (priv->mf.height == 240)
+ if (fmt->height == 240)
fld |= FLD_FLD_NUM(0);
else
fld |= FLD_FLD_NUM(1);
@@ -1049,15 +1053,18 @@ static int rcsi2_c_phy_setting_v4h(struct rcar_csi2 *priv, int msps)
return 0;
}
-static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv)
+static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv,
+ struct v4l2_subdev_state *state)
{
const struct rcar_csi2_format *format;
+ struct v4l2_mbus_framefmt *fmt;
unsigned int lanes;
int msps;
int ret;
- /* Calculate parameters */
- format = rcsi2_code_to_fmt(priv->mf.code);
+ /* Use the format on the sink pad to compute the receiver config. */
+ fmt = v4l2_subdev_state_get_format(state, RCAR_CSI2_SINK);
+ format = rcsi2_code_to_fmt(fmt->code);
if (!format)
return -EINVAL;
@@ -1114,7 +1121,7 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv)
return 0;
}
-static int rcsi2_start(struct rcar_csi2 *priv)
+static int rcsi2_start(struct rcar_csi2 *priv, struct v4l2_subdev_state *state)
{
int ret;
@@ -1122,7 +1129,7 @@ static int rcsi2_start(struct rcar_csi2 *priv)
if (ret < 0)
return ret;
- ret = priv->info->start_receiver(priv);
+ ret = priv->info->start_receiver(priv, state);
if (ret) {
rcsi2_enter_standby(priv);
return ret;
@@ -1146,17 +1153,16 @@ static void rcsi2_stop(struct rcar_csi2 *priv)
static int rcsi2_s_stream(struct v4l2_subdev *sd, int enable)
{
struct rcar_csi2 *priv = sd_to_csi2(sd);
+ struct v4l2_subdev_state *state;
int ret = 0;
- mutex_lock(&priv->lock);
+ if (!priv->remote)
+ return -ENODEV;
- if (!priv->remote) {
- ret = -ENODEV;
- goto out;
- }
+ state = v4l2_subdev_lock_and_get_active_state(&priv->subdev);
if (enable && priv->stream_count == 0) {
- ret = rcsi2_start(priv);
+ ret = rcsi2_start(priv, state);
if (ret)
goto out;
} else if (!enable && priv->stream_count == 1) {
@@ -1165,49 +1171,26 @@ static int rcsi2_s_stream(struct v4l2_subdev *sd, int enable)
priv->stream_count += enable ? 1 : -1;
out:
- mutex_unlock(&priv->lock);
+ v4l2_subdev_unlock_state(state);
return ret;
}
static int rcsi2_set_pad_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
- struct rcar_csi2 *priv = sd_to_csi2(sd);
- struct v4l2_mbus_framefmt *framefmt;
-
- mutex_lock(&priv->lock);
+ if (format->pad > RCAR_CSI2_SINK)
+ return v4l2_subdev_get_fmt(sd, state, format);
if (!rcsi2_code_to_fmt(format->format.code))
format->format.code = rcar_csi2_formats[0].code;
- if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
- priv->mf = format->format;
- } else {
- framefmt = v4l2_subdev_state_get_format(sd_state, 0);
- *framefmt = format->format;
- }
-
- mutex_unlock(&priv->lock);
-
- return 0;
-}
-
-static int rcsi2_get_pad_format(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct rcar_csi2 *priv = sd_to_csi2(sd);
-
- mutex_lock(&priv->lock);
-
- if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
- format->format = priv->mf;
- else
- format->format = *v4l2_subdev_state_get_format(sd_state, 0);
+ *v4l2_subdev_state_get_format(state, format->pad) = format->format;
- mutex_unlock(&priv->lock);
+ /* Propagate the format to the source pads. */
+ for (unsigned int i = RCAR_CSI2_SOURCE_VC0; i < NR_OF_RCAR_CSI2_PAD; i++)
+ *v4l2_subdev_state_get_format(state, i) = format->format;
return 0;
}
@@ -1218,7 +1201,7 @@ static const struct v4l2_subdev_video_ops rcar_csi2_video_ops = {
static const struct v4l2_subdev_pad_ops rcar_csi2_pad_ops = {
.set_fmt = rcsi2_set_pad_format,
- .get_fmt = rcsi2_get_pad_format,
+ .get_fmt = v4l2_subdev_get_fmt,
};
static const struct v4l2_subdev_ops rcar_csi2_subdev_ops = {
@@ -1226,6 +1209,30 @@ static const struct v4l2_subdev_ops rcar_csi2_subdev_ops = {
.pad = &rcar_csi2_pad_ops,
};
+static int rcsi2_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ static const struct v4l2_mbus_framefmt rcar_csi2_default_fmt = {
+ .width = 1920,
+ .height = 1080,
+ .code = MEDIA_BUS_FMT_RGB888_1X24,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .field = V4L2_FIELD_NONE,
+ .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
+ .quantization = V4L2_QUANTIZATION_DEFAULT,
+ .xfer_func = V4L2_XFER_FUNC_DEFAULT,
+ };
+
+ for (unsigned int i = RCAR_CSI2_SINK; i < NR_OF_RCAR_CSI2_PAD; i++)
+ *v4l2_subdev_state_get_format(state, i) = rcar_csi2_default_fmt;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops rcar_csi2_internal_ops = {
+ .init_state = rcsi2_init_state,
+};
+
static irqreturn_t rcsi2_irq(int irq, void *data)
{
struct rcar_csi2 *priv = data;
@@ -1251,14 +1258,17 @@ static irqreturn_t rcsi2_irq(int irq, void *data)
static irqreturn_t rcsi2_irq_thread(int irq, void *data)
{
+ struct v4l2_subdev_state *state;
struct rcar_csi2 *priv = data;
- mutex_lock(&priv->lock);
+ state = v4l2_subdev_lock_and_get_active_state(&priv->subdev);
+
rcsi2_stop(priv);
usleep_range(1000, 2000);
- if (rcsi2_start(priv))
+ if (rcsi2_start(priv, state))
dev_warn(priv->dev, "Failed to restart CSI-2 receiver\n");
- mutex_unlock(&priv->lock);
+
+ v4l2_subdev_unlock_state(state);
return IRQ_HANDLED;
}
@@ -1870,23 +1880,23 @@ static int rcsi2_probe(struct platform_device *pdev)
priv->dev = &pdev->dev;
- mutex_init(&priv->lock);
priv->stream_count = 0;
ret = rcsi2_probe_resources(priv, pdev);
if (ret) {
dev_err(priv->dev, "Failed to get resources\n");
- goto error_mutex;
+ return ret;
}
platform_set_drvdata(pdev, priv);
ret = rcsi2_parse_dt(priv);
if (ret)
- goto error_mutex;
+ return ret;
priv->subdev.owner = THIS_MODULE;
priv->subdev.dev = &pdev->dev;
+ priv->subdev.internal_ops = &rcar_csi2_internal_ops;
v4l2_subdev_init(&priv->subdev, &rcar_csi2_subdev_ops);
v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
snprintf(priv->subdev.name, sizeof(priv->subdev.name), "%s %s",
@@ -1912,21 +1922,25 @@ static int rcsi2_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
+ ret = v4l2_subdev_init_finalize(&priv->subdev);
+ if (ret)
+ goto error_pm_runtime;
+
ret = v4l2_async_register_subdev(&priv->subdev);
if (ret < 0)
- goto error_pm_runtime;
+ goto error_subdev;
dev_info(priv->dev, "%d lanes found\n", priv->lanes);
return 0;
+error_subdev:
+ v4l2_subdev_cleanup(&priv->subdev);
error_pm_runtime:
pm_runtime_disable(&pdev->dev);
error_async:
v4l2_async_nf_unregister(&priv->notifier);
v4l2_async_nf_cleanup(&priv->notifier);
-error_mutex:
- mutex_destroy(&priv->lock);
return ret;
}
@@ -1941,8 +1955,6 @@ static void rcsi2_remove(struct platform_device *pdev)
v4l2_subdev_cleanup(&priv->subdev);
pm_runtime_disable(&pdev->dev);
-
- mutex_destroy(&priv->lock);
}
static struct platform_driver rcar_csi2_pdrv = {
--
2.44.0
