Add mean window size parameter for debayer filter as a control in
vimc-debayer.
vimc-debayer was patched to allow changing mean windows parameter
of the filter without needing to reload the driver. The parameter
can now be set using a v4l2-ctl control(mean_window_size).
Co-developed-by: Laís Pessine do Carmo <laisp...@gmail.com>
Signed-off-by: Laís Pessine do Carmo <laisp...@gmail.com>
Signed-off-by: Arthur Moraes do Lago <arthurmoraesl...@gmail.com>
---
Changes in V3:
- Renamed debayer control
- Fixed typo in documentation
- Freed control handler in vimc_deb_release
This commit is based on Shuah Khan's patch series 171283
("Collapse vimc single monolithic driver").
Thanks.
---
Documentation/media/v4l-drivers/vimc.rst | 10 +--
drivers/media/platform/vimc/vimc-common.h | 1 +
drivers/media/platform/vimc/vimc-debayer.c | 89 +++++++++++++++++++---
3 files changed, 79 insertions(+), 21 deletions(-)
diff --git a/Documentation/media/v4l-drivers/vimc.rst
b/Documentation/media/v4l-drivers/vimc.rst
index a582af0509ee..28646c76dad5 100644
--- a/Documentation/media/v4l-drivers/vimc.rst
+++ b/Documentation/media/v4l-drivers/vimc.rst
@@ -80,9 +80,7 @@ vimc-capture:
Module options
---------------
-Vimc has a few module parameters to configure the driver.
-
- param=value
+Vimc has a module parameter to configure the driver.
* ``sca_mult=<unsigned int>``
@@ -91,12 +89,6 @@ Vimc has a few module parameters to configure the driver.
original one. Currently, only supports scaling up (the default value
is 3).
-* ``deb_mean_win_size=<unsigned int>``
-
- Window size to calculate the mean. Note: the window size needs to be an
- odd number, as the main pixel stays in the center of the window,
- otherwise the next odd number is considered (the default value is 3).
-
Source code documentation
-------------------------
diff --git a/drivers/media/platform/vimc/vimc-common.h
b/drivers/media/platform/vimc/vimc-common.h
index 236412ad7548..3a5102ddf794 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -19,6 +19,7 @@
#define VIMC_CID_VIMC_BASE (0x00f00000 | 0xf000)
#define VIMC_CID_VIMC_CLASS (0x00f00000 | 1)
#define VIMC_CID_TEST_PATTERN (VIMC_CID_VIMC_BASE + 0)
+#define VIMC_CID_MEAN_WIN_SIZE (VIMC_CID_VIMC_BASE + 1)
#define VIMC_FRAME_MAX_WIDTH 4096
#define VIMC_FRAME_MAX_HEIGHT 2160
diff --git a/drivers/media/platform/vimc/vimc-debayer.c
b/drivers/media/platform/vimc/vimc-debayer.c
index 37f3767db469..f1fa7aa023a3 100644
--- a/drivers/media/platform/vimc/vimc-debayer.c
+++ b/drivers/media/platform/vimc/vimc-debayer.c
@@ -11,17 +11,12 @@
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
#include <media/v4l2-subdev.h>
#include "vimc-common.h"
-static unsigned int deb_mean_win_size = 3;
-module_param(deb_mean_win_size, uint, 0000);
-MODULE_PARM_DESC(deb_mean_win_size, " the window size to calculate the mean.\n"
- "NOTE: the window size needs to be an odd number, as the main pixel "
- "stays in the center of the window, otherwise the next odd number "
- "is considered");
-
enum vimc_deb_rgb_colors {
VIMC_DEB_RED = 0,
VIMC_DEB_GREEN = 1,
@@ -46,6 +41,8 @@ struct vimc_deb_device {
u8 *src_frame;
const struct vimc_deb_pix_map *sink_pix_map;
unsigned int sink_bpp;
+ unsigned int mean_win_size;
+ struct v4l2_ctrl_handler hdl;
};
static const struct v4l2_mbus_framefmt sink_fmt_default = {
@@ -346,11 +343,18 @@ static int vimc_deb_s_stream(struct v4l2_subdev *sd, int
enable)
return 0;
}
+static const struct v4l2_subdev_core_ops vimc_deb_core_ops = {
+ .log_status = v4l2_ctrl_subdev_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
static const struct v4l2_subdev_video_ops vimc_deb_video_ops = {
.s_stream = vimc_deb_s_stream,
};
static const struct v4l2_subdev_ops vimc_deb_ops = {
+ .core = &vimc_deb_core_ops,
.pad = &vimc_deb_pad_ops,
.video = &vimc_deb_video_ops,
};
@@ -384,7 +388,7 @@ static void vimc_deb_calc_rgb_sink(struct vimc_deb_device
*vdeb,
* the top left corner of the mean window (considering the current
* pixel as the center)
*/
- seek = deb_mean_win_size / 2;
+ seek = vdeb->mean_win_size / 2;
/* Sum the values of the colors in the mean window */
@@ -471,14 +475,41 @@ static void *vimc_deb_process_frame(struct
vimc_ent_device *ved,
}
return vdeb->src_frame;
+}
+
+static inline void vimc_deb_s_mean_win_size(struct vimc_deb_device *vdeb,
+ unsigned int mean_win_size)
+{
+ if (vdeb->mean_win_size == mean_win_size)
+ return;
+ vdeb->mean_win_size = mean_win_size;
+}
+static int vimc_deb_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct vimc_deb_device *vdeb =
+ container_of(ctrl->handler, struct vimc_deb_device, hdl);
+
+ switch (ctrl->id) {
+ case VIMC_CID_MEAN_WIN_SIZE:
+ vimc_deb_s_mean_win_size(vdeb, ctrl->val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
}
+static const struct v4l2_ctrl_ops vimc_deb_ctrl_ops = {
+ .s_ctrl = vimc_deb_s_ctrl,
+};
+
static void vimc_deb_release(struct v4l2_subdev *sd)
{
struct vimc_deb_device *vdeb =
container_of(sd, struct vimc_deb_device, sd);
+ v4l2_ctrl_handler_free(&vdeb->hdl);
vimc_pads_cleanup(vdeb->ved.pads);
kfree(vdeb);
}
@@ -495,6 +526,24 @@ void vimc_deb_rm(struct vimc_device *vimc, struct
vimc_ent_device *ved)
vimc_ent_sd_unregister(ved, &vdeb->sd);
}
+static const struct v4l2_ctrl_config vimc_deb_ctrl_class = {
+ .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
+ .id = VIMC_CID_VIMC_CLASS,
+ .name = "VIMC Controls",
+ .type = V4L2_CTRL_TYPE_CTRL_CLASS,
+};
+
+static const struct v4l2_ctrl_config vimc_deb_ctrl_mean_win_size = {
+ .ops = &vimc_deb_ctrl_ops,
+ .id = VIMC_CID_MEAN_WIN_SIZE,
+ .name = "Debayer Mean Window Size",
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .min = 1,
+ .max = 25,
+ .step = 2,
+ .def = 3,
+};
+
struct vimc_ent_device *vimc_deb_add(struct vimc_device *vimc,
const char *vcfg_name)
{
@@ -507,6 +556,16 @@ struct vimc_ent_device *vimc_deb_add(struct vimc_device
*vimc,
if (!vdeb)
return NULL;
+ /* Create controls: */
+ v4l2_ctrl_handler_init(&vdeb->hdl, 2);
+ v4l2_ctrl_new_custom(&vdeb->hdl, &vimc_deb_ctrl_class, NULL);
+ v4l2_ctrl_new_custom(&vdeb->hdl, &vimc_deb_ctrl_mean_win_size, NULL);
+ vdeb->sd.ctrl_handler = &vdeb->hdl;
+ if (vdeb->hdl.error) {
+ ret = vdeb->hdl.error;
+ goto err_free_vdeb;
+ }
+
/* Initialize ved and sd */
ret = vimc_ent_sd_register(&vdeb->ved, &vdeb->sd, v4l2_dev,
vcfg_name,
@@ -514,13 +573,12 @@ struct vimc_ent_device *vimc_deb_add(struct vimc_device
*vimc,
(const unsigned long[2]) {MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
&vimc_deb_int_ops, &vimc_deb_ops);
- if (ret) {
- kfree(vdeb);
- return NULL;
- }
+ if (ret)
+ goto err_free_hdl;
vdeb->ved.process_frame = vimc_deb_process_frame;
vdeb->dev = &vimc->pdev.dev;
+ vdeb->mean_win_size = vimc_deb_ctrl_mean_win_size.def;
/* Initialize the frame format */
vdeb->sink_fmt = sink_fmt_default;
@@ -534,4 +592,11 @@ struct vimc_ent_device *vimc_deb_add(struct vimc_device
*vimc,
vdeb->set_rgb_src = vimc_deb_set_rgb_mbus_fmt_rgb888_1x24;
return &vdeb->ved;
+
+err_free_hdl:
+ v4l2_ctrl_handler_free(&vdeb->hdl);
+err_free_vdeb:
+ kfree(vdeb);
+
+ return NULL;
}
--
2.23.0
