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Date: Sun, 1 Sep 2019 16:40:31 -0300
From: Arthur Moraes do Lago <arthurmoraeslago@...il.com>
To: helen.koike@...labora.com, mchehab@...nel.org,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
lkcamp@...ts.libreplanetbr.org
Subject: [PATCH] media: vimc: Implement debayer control for mean window size
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 <laispc19@...il.com>
Signed-off-by: Laís Pessine do Carmo <laispc19@...il.com>
Signed-off-by: Arthur Moraes do Lago <arthurmoraeslago@...il.com>
---
This patch was made on top of Shuah Khan's patch (162623).
Thanks.
---
drivers/media/platform/vimc/vimc-common.h | 1 +
drivers/media/platform/vimc/vimc-debayer.c | 81 ++++++++++++++++++----
2 files changed, 70 insertions(+), 12 deletions(-)
diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 5b2282de395c..547ff04a415e 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 6cee911bf149..aa3edeed96bc 100644
--- a/drivers/media/platform/vimc/vimc-debayer.c
+++ b/drivers/media/platform/vimc/vimc-debayer.c
@@ -11,17 +11,11 @@
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
+#include <media/v4l2-ctrls.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");
-
#define IS_SINK(pad) (!pad)
#define IS_SRC(pad) (pad)
@@ -49,6 +43,8 @@ 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 = {
@@ -387,7 +383,7 @@ 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 */
@@ -477,6 +473,33 @@ static void *vimc_deb_process_frame(struct vimc_ent_device *ved,
}
+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 =
@@ -502,6 +525,24 @@ void vimc_deb_rm(struct vimc_device *vimc, struct vimc_ent_config *vcfg)
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 = "Mean window size",
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .min = 1,
+ .max = 99,
+ .step = 2,
+ .def = 3,
+};
+
int vimc_deb_add(struct vimc_device *vimc, struct vimc_ent_config *vcfg)
{
struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
@@ -513,6 +554,16 @@ int vimc_deb_add(struct vimc_device *vimc, struct vimc_ent_config *vcfg)
if (!vdeb)
return -ENOMEM;
+ /* 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,
@@ -520,13 +571,12 @@ int vimc_deb_add(struct vimc_device *vimc, struct vimc_ent_config *vcfg)
(const unsigned long[2]) {MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
&vimc_deb_int_ops, &vimc_deb_ops);
- if (ret) {
- kfree(vdeb);
- return ret;
- }
+ 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;
@@ -541,4 +591,11 @@ int vimc_deb_add(struct vimc_device *vimc, struct vimc_ent_config *vcfg)
vcfg->ved = &vdeb->ved;
return 0;
+
+err_free_hdl:
+ v4l2_ctrl_handler_free(&vdeb->hdl);
+err_free_vdeb:
+ kfree(vdeb);
+
+ return ret;
}
--
2.23.0
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