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Subject: media: vimc: sensor: Use subdev active state
Author: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Date: Thu Apr 25 02:57:39 2024 +0300
Store the active formats and crop rectangle in the subdevice active
state. This simplifies implementation of the format and selection
accessors, and allows using the v4l2_subdev_get_fmt() helper to
implement the .get_fmt() operation.
The active configuration that is used in the .process_frame() handler is
still stored in the vimc_sensor_device structure. The driver could
instead access the active state in the .process_frame() handler, but the
required locking could interfere with the real time constraints of the
frame processing. This data would be stored in registers in the
.s_stream() handler for real hardware, storing it in dedicated storage
thus mimics a real driver. To differentiate them from the rest of the
device private data, move the corresponding fields to a sub-structure of
vimc_sensor_device named hw.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Shuah Khan <sk...@linuxfoundation.org>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/test-drivers/vimc/vimc-sensor.c | 108 ++++++++++++--------------
1 file changed, 50 insertions(+), 58 deletions(-)
---
diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c
b/drivers/media/test-drivers/vimc/vimc-sensor.c
index 9eb24c4791bf..027767777763 100644
--- a/drivers/media/test-drivers/vimc/vimc-sensor.c
+++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
@@ -24,13 +24,20 @@ struct vimc_sensor_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct tpg_data tpg;
- u8 *frame;
- enum vimc_sensor_osd_mode osd_value;
- u64 start_stream_ts;
- /* The active format */
- struct v4l2_mbus_framefmt mbus_format;
struct v4l2_ctrl_handler hdl;
struct media_pad pad;
+
+ u8 *frame;
+
+ /*
+ * Virtual "hardware" configuration, filled when the stream starts or
+ * when controls are set.
+ */
+ struct {
+ struct v4l2_area size;
+ enum vimc_sensor_osd_mode osd_value;
+ u64 start_stream_ts;
+ } hw;
};
static const struct v4l2_mbus_framefmt fmt_default = {
@@ -88,36 +95,22 @@ static int vimc_sensor_enum_frame_size(struct v4l2_subdev
*sd,
return 0;
}
-static int vimc_sensor_get_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *fmt)
+static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor,
+ const struct v4l2_mbus_framefmt *format)
{
- struct vimc_sensor_device *vsensor =
- container_of(sd, struct vimc_sensor_device, sd);
-
- fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
- *v4l2_subdev_state_get_format(sd_state, fmt->pad) :
- vsensor->mbus_format;
+ const struct vimc_pix_map *vpix = vimc_pix_map_by_code(format->code);
- return 0;
-}
-
-static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor)
-{
- const struct vimc_pix_map *vpix =
- vimc_pix_map_by_code(vsensor->mbus_format.code);
-
- tpg_reset_source(&vsensor->tpg, vsensor->mbus_format.width,
- vsensor->mbus_format.height,
vsensor->mbus_format.field);
- tpg_s_bytesperline(&vsensor->tpg, 0, vsensor->mbus_format.width *
vpix->bpp);
- tpg_s_buf_height(&vsensor->tpg, vsensor->mbus_format.height);
+ tpg_reset_source(&vsensor->tpg, format->width, format->height,
+ format->field);
+ tpg_s_bytesperline(&vsensor->tpg, 0, format->width * vpix->bpp);
+ tpg_s_buf_height(&vsensor->tpg, format->height);
tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat);
/* TODO: add support for V4L2_FIELD_ALTERNATE */
- tpg_s_field(&vsensor->tpg, vsensor->mbus_format.field, false);
- tpg_s_colorspace(&vsensor->tpg, vsensor->mbus_format.colorspace);
- tpg_s_ycbcr_enc(&vsensor->tpg, vsensor->mbus_format.ycbcr_enc);
- tpg_s_quantization(&vsensor->tpg, vsensor->mbus_format.quantization);
- tpg_s_xfer_func(&vsensor->tpg, vsensor->mbus_format.xfer_func);
+ tpg_s_field(&vsensor->tpg, format->field, false);
+ tpg_s_colorspace(&vsensor->tpg, format->colorspace);
+ tpg_s_ycbcr_enc(&vsensor->tpg, format->ycbcr_enc);
+ tpg_s_quantization(&vsensor->tpg, format->quantization);
+ tpg_s_xfer_func(&vsensor->tpg, format->xfer_func);
}
static void vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
@@ -148,15 +141,11 @@ static int vimc_sensor_set_fmt(struct v4l2_subdev *sd,
struct vimc_sensor_device *vsensor = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf;
- if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
- /* Do not change the format while stream is on */
- if (vsensor->frame)
- return -EBUSY;
+ /* Do not change the format while stream is on */
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE && vsensor->frame)
+ return -EBUSY;
- mf = &vsensor->mbus_format;
- } else {
- mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
- }
+ mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
/* Set the new format */
vimc_sensor_adjust_fmt(&fmt->format);
@@ -181,7 +170,7 @@ static int vimc_sensor_set_fmt(struct v4l2_subdev *sd,
static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = {
.enum_mbus_code = vimc_sensor_enum_mbus_code,
.enum_frame_size = vimc_sensor_enum_frame_size,
- .get_fmt = vimc_sensor_get_fmt,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = vimc_sensor_set_fmt,
};
@@ -198,7 +187,7 @@ static void *vimc_sensor_process_frame(struct
vimc_ent_device *ved,
tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame);
tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame);
- switch (vsensor->osd_value) {
+ switch (vsensor->hw.osd_value) {
case VIMC_SENSOR_OSD_SHOW_ALL: {
const char *order = tpg_g_color_order(&vsensor->tpg);
@@ -212,15 +201,14 @@ static void *vimc_sensor_process_frame(struct
vimc_ent_device *ved,
vsensor->tpg.hue);
tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16,
str);
snprintf(str, sizeof(str), "sensor size: %dx%d",
- vsensor->mbus_format.width,
- vsensor->mbus_format.height);
+ vsensor->hw.size.width, vsensor->hw.size.height);
tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16,
str);
fallthrough;
}
case VIMC_SENSOR_OSD_SHOW_COUNTERS: {
unsigned int ms;
- ms = div_u64(ktime_get_ns() - vsensor->start_stream_ts,
1000000);
+ ms = div_u64(ktime_get_ns() - vsensor->hw.start_stream_ts,
1000000);
snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
(ms / (60 * 60 * 1000)) % 24,
(ms / (60 * 1000)) % 60,
@@ -243,15 +231,25 @@ static int vimc_sensor_s_stream(struct v4l2_subdev *sd,
int enable)
container_of(sd, struct vimc_sensor_device, sd);
if (enable) {
+ const struct v4l2_mbus_framefmt *format;
+ struct v4l2_subdev_state *state;
const struct vimc_pix_map *vpix;
unsigned int frame_size;
- vsensor->start_stream_ts = ktime_get_ns();
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+ format = v4l2_subdev_state_get_format(state, 0);
- /* Calculate the frame size */
- vpix = vimc_pix_map_by_code(vsensor->mbus_format.code);
- frame_size = vsensor->mbus_format.width * vpix->bpp *
- vsensor->mbus_format.height;
+ /* Configure the test pattern generator. */
+ vimc_sensor_tpg_s_format(vsensor, format);
+
+ /* Calculate the frame size. */
+ vpix = vimc_pix_map_by_code(format->code);
+ frame_size = format->width * vpix->bpp * format->height;
+
+ vsensor->hw.size.width = format->width;
+ vsensor->hw.size.height = format->height;
+
+ v4l2_subdev_unlock_state(state);
/*
* Allocate the frame buffer. Use vmalloc to be able to
@@ -261,9 +259,7 @@ static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int
enable)
if (!vsensor->frame)
return -ENOMEM;
- /* configure the test pattern generator */
- vimc_sensor_tpg_s_format(vsensor);
-
+ vsensor->hw.start_stream_ts = ktime_get_ns();
} else {
vfree(vsensor->frame);
@@ -321,7 +317,7 @@ static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl)
tpg_s_saturation(&vsensor->tpg, ctrl->val);
break;
case VIMC_CID_OSD_TEXT_MODE:
- vsensor->osd_value = ctrl->val;
+ vsensor->hw.osd_value = ctrl->val;
break;
default:
return -EINVAL;
@@ -414,8 +410,7 @@ static struct vimc_ent_device *vimc_sensor_add(struct
vimc_device *vimc,
}
/* Initialize the test pattern generator */
- tpg_init(&vsensor->tpg, vsensor->mbus_format.width,
- vsensor->mbus_format.height);
+ tpg_init(&vsensor->tpg, fmt_default.width, fmt_default.height);
ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH);
if (ret)
goto err_free_hdl;
@@ -432,9 +427,6 @@ static struct vimc_ent_device *vimc_sensor_add(struct
vimc_device *vimc,
vsensor->ved.process_frame = vimc_sensor_process_frame;
vsensor->ved.dev = vimc->mdev.dev;
- /* Initialize the frame format */
- vsensor->mbus_format = fmt_default;
-
return &vsensor->ved;
err_free_tpg:
