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media: imx-mipi-csis: Use V4L2 subdev active state 

Use the V4L2 subdev active state API to store the active format. This
simplifies the driver not only by dropping the mipi_csis_device csis_fmt
and format_mbus fields, but it also allows dropping the device lock,
replaced with the state lock.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Adam Ford <aford173@gmail.com> #imx8mn-beacon
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Laurent Pinchart 2023-01-26 02:10:01 +01:00 committed by Mauro Carvalho Chehab
parent 2f03d3cb06
commit 11927d0fd0
1 changed files with 47 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

135
drivers/media/platform/nxp/imx-mipi-csis.c
View File

@ -327,10 +327,6 @@ struct mipi_csis_device {
u32 hs_settle;
u32 clk_settle;
struct mutex lock; /* Protect csis_fmt and format_mbus */
const struct csis_pix_format *csis_fmt;
struct v4l2_mbus_framefmt format_mbus[CSIS_PADS_NUM];
spinlock_t slock; /* Protect events */
struct mipi_csis_event events[MIPI_CSIS_NUM_EVENTS];
struct dentry *debugfs_root;
@ -559,7 +555,6 @@ static void mipi_csis_system_enable(struct mipi_csis_device *csis, int on)
mipi_csis_write(csis, MIPI_CSIS_DPHY_CMN_CTRL, val);
}
/* Called with the csis.lock mutex held */
static void __mipi_csis_set_format(struct mipi_csis_device *csis,
const struct v4l2_mbus_framefmt *format,
const struct csis_pix_format *csis_fmt)
@ -941,79 +936,67 @@ static struct mipi_csis_device *sd_to_mipi_csis_device(struct v4l2_subdev *sdev)
static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
const struct v4l2_mbus_framefmt *format = &csis->format_mbus[CSIS_PAD_SINK];
const struct csis_pix_format *csis_fmt = csis->csis_fmt;
const struct v4l2_mbus_framefmt *format;
const struct csis_pix_format *csis_fmt;
struct v4l2_subdev_state *state;
int ret;
if (!enable) {
mutex_lock(&csis->lock);
v4l2_subdev_call(csis->src_sd, video, s_stream, 0);
mipi_csis_stop_stream(csis);
if (csis->debug.enable)
mipi_csis_log_counters(csis, true);
mutex_unlock(&csis->lock);
pm_runtime_put(csis->dev);
return 0;
}
state = v4l2_subdev_lock_and_get_active_state(sd);
format = v4l2_subdev_get_pad_format(sd, state, CSIS_PAD_SINK);
csis_fmt = find_csis_format(format->code);
ret = mipi_csis_calculate_params(csis, csis_fmt);
if (ret < 0)
return ret;
goto err_unlock;
mipi_csis_clear_counters(csis);
ret = pm_runtime_resume_and_get(csis->dev);
if (ret < 0)
return ret;
mutex_lock(&csis->lock);
goto err_unlock;
mipi_csis_start_stream(csis, format, csis_fmt);
ret = v4l2_subdev_call(csis->src_sd, video, s_stream, 1);
if (ret < 0)
goto error;
goto err_stop;
mipi_csis_log_counters(csis, true);
mutex_unlock(&csis->lock);
v4l2_subdev_unlock_state(state);
return 0;
error:
err_stop:
mipi_csis_stop_stream(csis);
mutex_unlock(&csis->lock);
pm_runtime_put(csis->dev);
err_unlock:
v4l2_subdev_unlock_state(state);
return ret;
}
static struct v4l2_mbus_framefmt *
mipi_csis_get_format(struct mipi_csis_device *csis,
struct v4l2_subdev_state *sd_state,
enum v4l2_subdev_format_whence which,
unsigned int pad)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&csis->sd, sd_state, pad);
return &csis->format_mbus[pad];
}
static int mipi_csis_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
struct v4l2_mbus_framefmt *fmt_sink;
struct v4l2_mbus_framefmt *fmt_source;
enum v4l2_subdev_format_whence which;
which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
fmt_sink = mipi_csis_get_format(csis, sd_state, which, CSIS_PAD_SINK);
fmt_sink = v4l2_subdev_get_pad_format(sd, sd_state, CSIS_PAD_SINK);
fmt_source = v4l2_subdev_get_pad_format(sd, sd_state, CSIS_PAD_SOURCE);
fmt_sink->code = MEDIA_BUS_FMT_UYVY8_1X16;
fmt_sink->width = MIPI_CSIS_DEF_PIX_WIDTH;
@ -1027,36 +1010,15 @@ static int mipi_csis_init_cfg(struct v4l2_subdev *sd,
V4L2_MAP_QUANTIZATION_DEFAULT(false, fmt_sink->colorspace,
fmt_sink->ycbcr_enc);
fmt_source = mipi_csis_get_format(csis, sd_state, which,
CSIS_PAD_SOURCE);
*fmt_source = *fmt_sink;
return 0;
}
static int mipi_csis_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *sdformat)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
struct v4l2_mbus_framefmt *fmt;
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
sdformat->pad);
mutex_lock(&csis->lock);
sdformat->format = *fmt;
mutex_unlock(&csis->lock);
return 0;
}
static int mipi_csis_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
/*
* The CSIS can't transcode in any way, the source format is identical
* to the sink format.
@ -1067,8 +1029,7 @@ static int mipi_csis_enum_mbus_code(struct v4l2_subdev *sd,
if (code->index > 0)
return -EINVAL;
fmt = mipi_csis_get_format(csis, sd_state, code->which,
code->pad);
fmt = v4l2_subdev_get_pad_format(sd, sd_state, code->pad);
code->code = fmt->code;
return 0;
}
@ -1088,7 +1049,6 @@ static int mipi_csis_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *sdformat)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
struct csis_pix_format const *csis_fmt;
struct v4l2_mbus_framefmt *fmt;
unsigned int align;
@ -1098,7 +1058,7 @@ static int mipi_csis_set_fmt(struct v4l2_subdev *sd,
* modified.
*/
if (sdformat->pad == CSIS_PAD_SOURCE)
return mipi_csis_get_fmt(sd, sd_state, sdformat);
return v4l2_subdev_get_fmt(sd, sd_state, sdformat);
if (sdformat->pad != CSIS_PAD_SINK)
return -EINVAL;
@ -1136,10 +1096,7 @@ static int mipi_csis_set_fmt(struct v4l2_subdev *sd,
&sdformat->format.height, 1,
CSIS_MAX_PIX_HEIGHT, 0, 0);
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
sdformat->pad);
mutex_lock(&csis->lock);
fmt = v4l2_subdev_get_pad_format(sd, sd_state, sdformat->pad);
fmt->code = csis_fmt->code;
fmt->width = sdformat->format.width;
@ -1152,44 +1109,40 @@ static int mipi_csis_set_fmt(struct v4l2_subdev *sd,
sdformat->format = *fmt;
/* Propagate the format from sink to source. */
fmt = mipi_csis_get_format(csis, sd_state, sdformat->which,
CSIS_PAD_SOURCE);
fmt = v4l2_subdev_get_pad_format(sd, sd_state, CSIS_PAD_SOURCE);
*fmt = sdformat->format;
/* The format on the source pad might change due to unpacking. */
fmt->code = csis_fmt->output;
/* Store the CSIS format descriptor for active formats. */
if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
csis->csis_fmt = csis_fmt;
mutex_unlock(&csis->lock);
return 0;
}
static int mipi_csis_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_frame_desc *fd)
{
struct mipi_csis_device *csis = sd_to_mipi_csis_device(sd);
struct v4l2_mbus_frame_desc_entry *entry = &fd->entry[0];
const struct csis_pix_format *csis_fmt;
const struct v4l2_mbus_framefmt *fmt;
struct v4l2_subdev_state *state;
if (pad != CSIS_PAD_SOURCE)
return -EINVAL;
state = v4l2_subdev_lock_and_get_active_state(sd);
fmt = v4l2_subdev_get_pad_format(sd, state, CSIS_PAD_SOURCE);
csis_fmt = find_csis_format(fmt->code);
v4l2_subdev_unlock_state(state);
fd->type = V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL;
fd->num_entries = 1;
memset(entry, 0, sizeof(*entry));
mutex_lock(&csis->lock);
entry->flags = 0;
entry->pixelcode = csis->csis_fmt->code;
entry->pixelcode = csis_fmt->code;
entry->bus.csi2.vc = 0;
entry->bus.csi2.dt = csis->csis_fmt->data_type;
mutex_unlock(&csis->lock);
entry->bus.csi2.dt = csis_fmt->data_type;
return 0;
}
@ -1216,7 +1169,7 @@ static const struct v4l2_subdev_video_ops mipi_csis_video_ops = {
static const struct v4l2_subdev_pad_ops mipi_csis_pad_ops = {
.init_cfg = mipi_csis_init_cfg,
.enum_mbus_code = mipi_csis_enum_mbus_code,
.get_fmt = mipi_csis_get_fmt,
.get_fmt = v4l2_subdev_get_fmt,
.set_fmt = mipi_csis_set_fmt,
.get_frame_desc = mipi_csis_get_frame_desc,
};
@ -1398,6 +1351,7 @@ static const struct dev_pm_ops mipi_csis_pm_ops = {
static int mipi_csis_subdev_init(struct mipi_csis_device *csis)
{
struct v4l2_subdev *sd = &csis->sd;
int ret;
v4l2_subdev_init(sd, &mipi_csis_subdev_ops);
sd->owner = THIS_MODULE;
@ -1419,15 +1373,21 @@ static int mipi_csis_subdev_init(struct mipi_csis_device *csis)
return -ENOENT;
}
csis->csis_fmt = &mipi_csis_formats[0];
mipi_csis_init_cfg(sd, NULL);
csis->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK
| MEDIA_PAD_FL_MUST_CONNECT;
csis->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE
| MEDIA_PAD_FL_MUST_CONNECT;
return media_entity_pads_init(&sd->entity, CSIS_PADS_NUM,
csis->pads);
ret = media_entity_pads_init(&sd->entity, CSIS_PADS_NUM, csis->pads);
if (ret)
return ret;
ret = v4l2_subdev_init_finalize(sd);
if (ret) {
media_entity_cleanup(&sd->entity);
return ret;
}
return 0;
}
static int mipi_csis_parse_dt(struct mipi_csis_device *csis)
@ -1452,7 +1412,6 @@ static int mipi_csis_probe(struct platform_device *pdev)
if (!csis)
return -ENOMEM;
mutex_init(&csis->lock);
spin_lock_init(&csis->slock);
csis->dev = dev;
@ -1533,6 +1492,7 @@ static int mipi_csis_probe(struct platform_device *pdev)
err_unregister_all:
mipi_csis_debugfs_exit(csis);
err_cleanup:
v4l2_subdev_cleanup(&csis->sd);
media_entity_cleanup(&csis->sd.entity);
v4l2_async_nf_unregister(&csis->notifier);
v4l2_async_nf_cleanup(&csis->notifier);
@ -1540,7 +1500,6 @@ err_cleanup:
err_disable_clock:
mipi_csis_clk_disable(csis);
fwnode_handle_put(csis->sd.fwnode);
mutex_destroy(&csis->lock);
return ret;
}
@ -1558,9 +1517,9 @@ static int mipi_csis_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
mipi_csis_runtime_suspend(&pdev->dev);
mipi_csis_clk_disable(csis);
v4l2_subdev_cleanup(&csis->sd);
media_entity_cleanup(&csis->sd.entity);
fwnode_handle_put(csis->sd.fwnode);
mutex_destroy(&csis->lock);
pm_runtime_set_suspended(&pdev->dev);
return 0;