On Fri Nov 7 11:34:33 2025 +0100, Michael Tretter wrote:
> Request the upstream mbus_config in csi_start, which starts the stream,
> instead of caching it in link_validate.
>
> This allows to get rid of the mbus_cfg field in the struct csi_priv and
> avoids state in the driver.
>
> Fixes: 4a34ec8e470c ("[media] media: imx: Add CSI subdev driver")
> Cc: [email protected]
> Reviewed-by: Frank Li <[email protected]>
> Signed-off-by: Michael Tretter <[email protected]>
> Reviewed-by: Philipp Zabel <[email protected]>
> Signed-off-by: Frank Li <[email protected]>
> Signed-off-by: Hans Verkuil <[email protected]>
Patch committed.
Thanks,
Hans Verkuil
drivers/staging/media/imx/imx-media-csi.c | 40 ++++++++++++++++++-------------
1 file changed, 24 insertions(+), 16 deletions(-)
---
diff --git a/drivers/staging/media/imx/imx-media-csi.c
b/drivers/staging/media/imx/imx-media-csi.c
index 725478bc2026..dc594b286f73 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -97,9 +97,6 @@ struct csi_priv {
/* the mipi virtual channel number at link validate */
int vc_num;
- /* media bus config of the upstream subdevice CSI is receiving from */
- struct v4l2_mbus_config mbus_cfg;
-
spinlock_t irqlock; /* protect eof_irq handler */
struct timer_list eof_timeout_timer;
int eof_irq;
@@ -403,7 +400,8 @@ static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
}
/* init the SMFC IDMAC channel */
-static int csi_idmac_setup_channel(struct csi_priv *priv)
+static int csi_idmac_setup_channel(struct csi_priv *priv,
+ struct v4l2_mbus_config *mbus_cfg)
{
struct imx_media_video_dev *vdev = priv->vdev;
const struct imx_media_pixfmt *incc;
@@ -432,7 +430,7 @@ static int csi_idmac_setup_channel(struct csi_priv *priv)
image.phys0 = phys[0];
image.phys1 = phys[1];
- passthrough = requires_passthrough(&priv->mbus_cfg, infmt, incc);
+ passthrough = requires_passthrough(mbus_cfg, infmt, incc);
passthrough_cycles = 1;
/*
@@ -572,11 +570,12 @@ static void csi_idmac_unsetup(struct csi_priv *priv,
csi_idmac_unsetup_vb2_buf(priv, state);
}
-static int csi_idmac_setup(struct csi_priv *priv)
+static int csi_idmac_setup(struct csi_priv *priv,
+ struct v4l2_mbus_config *mbus_cfg)
{
int ret;
- ret = csi_idmac_setup_channel(priv);
+ ret = csi_idmac_setup_channel(priv, mbus_cfg);
if (ret)
return ret;
@@ -595,7 +594,8 @@ static int csi_idmac_setup(struct csi_priv *priv)
return 0;
}
-static int csi_idmac_start(struct csi_priv *priv)
+static int csi_idmac_start(struct csi_priv *priv,
+ struct v4l2_mbus_config *mbus_cfg)
{
struct imx_media_video_dev *vdev = priv->vdev;
int ret;
@@ -619,7 +619,7 @@ static int csi_idmac_start(struct csi_priv *priv)
priv->last_eof = false;
priv->nfb4eof = false;
- ret = csi_idmac_setup(priv);
+ ret = csi_idmac_setup(priv, mbus_cfg);
if (ret) {
v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
goto out_free_dma_buf;
@@ -701,7 +701,8 @@ static void csi_idmac_stop(struct csi_priv *priv)
}
/* Update the CSI whole sensor and active windows */
-static int csi_setup(struct csi_priv *priv)
+static int csi_setup(struct csi_priv *priv,
+ struct v4l2_mbus_config *mbus_cfg)
{
struct v4l2_mbus_framefmt *infmt, *outfmt;
const struct imx_media_pixfmt *incc;
@@ -719,7 +720,7 @@ static int csi_setup(struct csi_priv *priv)
* if cycles is set, we need to handle this over multiple cycles as
* generic/bayer data
*/
- if (is_parallel_bus(&priv->mbus_cfg) && incc->cycles) {
+ if (is_parallel_bus(mbus_cfg) && incc->cycles) {
if_fmt.width *= incc->cycles;
crop.width *= incc->cycles;
}
@@ -730,7 +731,7 @@ static int csi_setup(struct csi_priv *priv)
priv->crop.width == 2 * priv->compose.width,
priv->crop.height == 2 * priv->compose.height);
- ipu_csi_init_interface(priv->csi, &priv->mbus_cfg, &if_fmt, outfmt);
+ ipu_csi_init_interface(priv->csi, mbus_cfg, &if_fmt, outfmt);
ipu_csi_set_dest(priv->csi, priv->dest);
@@ -745,9 +746,17 @@ static int csi_setup(struct csi_priv *priv)
static int csi_start(struct csi_priv *priv)
{
+ struct v4l2_mbus_config mbus_cfg = { .type = 0 };
struct v4l2_fract *input_fi, *output_fi;
int ret;
+ ret = csi_get_upstream_mbus_config(priv, &mbus_cfg);
+ if (ret) {
+ v4l2_err(&priv->sd,
+ "failed to get upstream media bus configuration\n");
+ return ret;
+ }
+
input_fi = &priv->frame_interval[CSI_SINK_PAD];
output_fi = &priv->frame_interval[priv->active_output_pad];
@@ -758,7 +767,7 @@ static int csi_start(struct csi_priv *priv)
return ret;
/* Skip first few frames from a BT.656 source */
- if (priv->mbus_cfg.type == V4L2_MBUS_BT656) {
+ if (mbus_cfg.type == V4L2_MBUS_BT656) {
u32 delay_usec, bad_frames = 20;
delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC *
@@ -769,12 +778,12 @@ static int csi_start(struct csi_priv *priv)
}
if (priv->dest == IPU_CSI_DEST_IDMAC) {
- ret = csi_idmac_start(priv);
+ ret = csi_idmac_start(priv, &mbus_cfg);
if (ret)
goto stop_upstream;
}
- ret = csi_setup(priv);
+ ret = csi_setup(priv, &mbus_cfg);
if (ret)
goto idmac_stop;
@@ -1138,7 +1147,6 @@ static int csi_link_validate(struct v4l2_subdev *sd,
mutex_lock(&priv->lock);
- priv->mbus_cfg = mbus_cfg;
is_csi2 = !is_parallel_bus(&mbus_cfg);
if (is_csi2) {
/*
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