[RFC PATCH v3 10/11] [media] vimc: deb: Add debayer filter

Helen Koike
2017-06-03T03:01:37Z

Implement the debayer filter and integrate it with the core

Signed-off-by: Helen Koike <helen.koike@collabora.com>

---

Changes in v3:
[media] vimc: deb: Add debayer filter
- Declare frame_size as a local variable
- s_stream(sd, 1): return 0 if stream is already enabled
- s_stream(sd, 0): return 0 if stream is already disabled
- s_stream: add ret variable to propagate return errors
- structure code to be a module, use platform_driver and component system
- fix multiline comment
- s/thought/through
- s/RGB8888/RGB888
- clamp height and width of the image by an even value
- if user try to set colorspace to an invalid format, set all
colorimetry parameters to _DEFAULT
- uset _DEFAULT for colorimetry in the default format

Changes in v2:
[media] vimc: deb: Add debayer filter
- Using MEDIA_ENT_F_ATV_DECODER in function
- remove v4l2_dev and dev from vimc_deb_device struct
- src fmt propagates from the sink
- coding style
- remove redundant else if statements
- check end of enum and remove BUG_ON
- enum frame size with min and max values
- set/try fmt
- remove unecessary include freezer.h
- check pad types on create
- return EBUSY when trying to set the format while stream is on
- remove vsd struct
- add IS_SRC and IS_SINK macros
- add deb_mean_win_size as a parameter of the module
- check set_fmt default parameters for quantization, colorspace ...
- add more dev_dbg

---
drivers/media/platform/vimc/Makefile | 4 +-
drivers/media/platform/vimc/vimc-common.h | 2 +
drivers/media/platform/vimc/vimc-debayer.c | 615 +++++++++++++++++++++++++++++
3 files changed, 620 insertions(+), 1 deletion(-)
create mode 100644 drivers/media/platform/vimc/vimc-debayer.c

diff --git a/drivers/media/platform/vimc/Makefile b/drivers/media/platform/vimc/Makefile
index 0e5d5ce..4fba8ef 100644
--- a/drivers/media/platform/vimc/Makefile
+++ b/drivers/media/platform/vimc/Makefile
@@ -1,6 +1,8 @@
vimc-objs := vimc-core.o
vimc_capture-objs := vimc-capture.o
vimc_common-objs := vimc-common.o
+vimc_debayer-objs := vimc-debayer.o
vimc_sensor-objs := vimc-sensor.o

-obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc_capture.o vimc_common.o vimc_sensor.o
+obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc_capture.o vimc_common.o vimc-debayer.o \
+ vimc_sensor.o
diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 27c9b8c..c63d51f 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -29,6 +29,8 @@

#define VIMC_PIPE_OPT 1

+#define VIMC_FRAME_INDEX(lin, col, width, bpp) ((lin * width + col) * bpp)
+
/**
* struct vimc_pix_map - maps media bus code with v4l2 pixel format
*
diff --git a/drivers/media/platform/vimc/vimc-debayer.c b/drivers/media/platform/vimc/vimc-debayer.c
new file mode 100644
index 0000000..9f9604c
--- /dev/null
+++ b/drivers/media/platform/vimc/vimc-debayer.c
@@ -0,0 +1,615 @@
+/*
+ * vimc-debayer.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/vmalloc.h>
+#include <linux/v4l2-mediabus.h>
+#include <media/v4l2-subdev.h>
+
+#include "vimc-common.h"
+
+#define VIMC_DEB_DRV_NAME "vimc-debayer"
+
+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 need 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)
+
+enum vimc_deb_rgb_colors {
+ VIMC_DEB_RED = 0,
+ VIMC_DEB_GREEN = 1,
+ VIMC_DEB_BLUE = 2,
+};
+
+struct vimc_deb_pix_map {
+ u32 code;
+ enum vimc_deb_rgb_colors order[2][2];
+};
+
+struct vimc_deb_device {
+ struct vimc_ent_device ved;
+ struct v4l2_subdev sd;
+ struct device *dev;
+ /* The active format */
+ struct v4l2_mbus_framefmt sink_fmt;
+ u32 src_code;
+ void (*set_rgb_src)(struct vimc_deb_device *vdeb, unsigned int lin,
+ unsigned int col, unsigned int rgb[3]);
+ /* Values calculated when the stream starts */
+ u8 *src_frame;
+ const struct vimc_deb_pix_map *sink_pix_map;
+ unsigned int sink_bpp;
+};
+
+static const struct v4l2_mbus_framefmt sink_fmt_default = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_RGB888_1X24,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+};
+
+static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = {
+ {
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_RED } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
+ { VIMC_DEB_RED, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
+ { VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_RED } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
+ { VIMC_DEB_RED, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
+ { VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_RED } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE },
+ { VIMC_DEB_RED, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED },
+ { VIMC_DEB_BLUE, VIMC_DEB_GREEN } }
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN },
+ { VIMC_DEB_GREEN, VIMC_DEB_BLUE } }
+ },
+};
+
+static const struct vimc_deb_pix_map *vimc_deb_pix_map_by_code(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(vimc_deb_pix_map_list); i++)
+ if (vimc_deb_pix_map_list[i].code == code)
+ return &vimc_deb_pix_map_list[i];
+
+ return NULL;
+}
+
+static int vimc_deb_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf;
+ unsigned int i;
+
+ mf = v4l2_subdev_get_try_format(sd, cfg, 0);
+ *mf = sink_fmt_default;
+
+ for (i = 1; i < sd->entity.num_pads; i++) {
+ mf = v4l2_subdev_get_try_format(sd, cfg, i);
+ *mf = sink_fmt_default;
+ mf->code = vdeb->src_code;
+ }
+
+ return 0;
+}
+
+static int vimc_deb_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ /* We only support one format for source pads */
+ if (IS_SRC(code->pad)) {
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+
+ if (code->index)
+ return -EINVAL;
+
+ code->code = vdeb->src_code;
+ } else {
+ if (code->index >= ARRAY_SIZE(vimc_deb_pix_map_list))
+ return -EINVAL;
+
+ code->code = vimc_deb_pix_map_list[code->index].code;
+ }
+
+ return 0;
+}
+
+static int vimc_deb_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+
+ if (fse->index)
+ return -EINVAL;
+
+ if (IS_SINK(fse->pad)) {
+ const struct vimc_deb_pix_map *vpix =
+ vimc_deb_pix_map_by_code(fse->code);
+
+ if (!vpix)
+ return -EINVAL;
+ } else if (fse->code != vdeb->src_code) {
+ return -EINVAL;
+ }
+
+ fse->min_width = VIMC_FRAME_MIN_WIDTH;
+ fse->max_width = VIMC_FRAME_MAX_WIDTH;
+ fse->min_height = VIMC_FRAME_MIN_HEIGHT;
+ fse->max_height = VIMC_FRAME_MAX_HEIGHT;
+
+ return 0;
+}
+
+static int vimc_deb_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+
+ /* Get the current sink format */
+ fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
+ *v4l2_subdev_get_try_format(sd, cfg, 0) :
+ vdeb->sink_fmt;
+
+ /* Set the right code for the source pad */
+ if (IS_SRC(fmt->pad))
+ fmt->format.code = vdeb->src_code;
+
+ return 0;
+}
+
+static void vimc_deb_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt)
+{
+ const struct vimc_deb_pix_map *vpix;
+
+ /* Don't accept a code that is not on the debayer table */
+ vpix = vimc_deb_pix_map_by_code(fmt->code);
+ if (!vpix)
+ fmt->code = sink_fmt_default.code;
+
+ fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
+ VIMC_FRAME_MAX_WIDTH) & ~1;
+ fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
+ VIMC_FRAME_MAX_HEIGHT) & ~1;
+
+ if (fmt->field == V4L2_FIELD_ANY)
+ fmt->field = sink_fmt_default.field;
+
+ if (fmt->colorspace == V4L2_COLORSPACE_DEFAULT)
+ fmt->colorspace = sink_fmt_default.colorspace;
+
+ /* Check if values are out of range */
+ if (fmt->colorspace > V4L2_COLORSPACE_DCI_P3) {
+ fmt->colorspace = sink_fmt_default.colorspace;
+ fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
+ fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ }
+ if (fmt->ycbcr_enc > V4L2_YCBCR_ENC_SMPTE240M)
+ fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ if (fmt->quantization > V4L2_QUANTIZATION_LIM_RANGE)
+ fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
+ if (fmt->xfer_func > V4L2_XFER_FUNC_SMPTE2084)
+ fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+}
+
+static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *sink_fmt;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+ /* Do not change the format while stream is on */
+ if (vdeb->src_frame)
+ return -EBUSY;
+
+ sink_fmt = &vdeb->sink_fmt;
+ } else {
+ sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+ }
+
+ /*
+ * Do not change the format of the source pad,
+ * it is propagated from the sink
+ */
+ if (IS_SRC(fmt->pad)) {
+ fmt->format = *sink_fmt;
+ /* TODO: Add support for other formats */
+ fmt->format.code = vdeb->src_code;
+ } else {
+ /* Set the new format in the sink pad */
+ vimc_deb_adjust_sink_fmt(&fmt->format);
+
+ dev_dbg(vdeb->dev, "%s: sink format update: "
+ "old:%dx%d (0x%x, %d, %d, %d, %d) "
+ "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vdeb->sd.name,
+ /* old */
+ sink_fmt->width, sink_fmt->height, sink_fmt->code,
+ sink_fmt->colorspace, sink_fmt->quantization,
+ sink_fmt->xfer_func, sink_fmt->ycbcr_enc,
+ /* new */
+ fmt->format.width, fmt->format.height, fmt->format.code,
+ fmt->format.colorspace, fmt->format.quantization,
+ fmt->format.xfer_func, fmt->format.ycbcr_enc);
+
+ *sink_fmt = fmt->format;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops vimc_deb_pad_ops = {
+ .init_cfg = vimc_deb_init_cfg,
+ .enum_mbus_code = vimc_deb_enum_mbus_code,
+ .enum_frame_size = vimc_deb_enum_frame_size,
+ .get_fmt = vimc_deb_get_fmt,
+ .set_fmt = vimc_deb_set_fmt,
+};
+
+static void vimc_deb_set_rgb_mbus_fmt_rgb888_1x24(struct vimc_deb_device *vdeb,
+ unsigned int lin,
+ unsigned int col,
+ unsigned int rgb[3])
+{
+ unsigned int i, index;
+
+ index = VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3);
+ for (i = 0; i < 3; i++)
+ vdeb->src_frame[index + i] = rgb[i];
+}
+
+static int vimc_deb_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd);
+ int ret;
+
+ if (enable) {
+ const struct vimc_pix_map *vpix;
+ unsigned int frame_size;
+
+ if (vdeb->src_frame)
+ return 0;
+
+ /* Calculate the frame size of the source pad */
+ vpix = vimc_pix_map_by_code(vdeb->src_code);
+ frame_size = vdeb->sink_fmt.width * vdeb->sink_fmt.height *
+ vpix->bpp;
+
+ /* Save the bytes per pixel of the sink */
+ vpix = vimc_pix_map_by_code(vdeb->sink_fmt.code);
+ vdeb->sink_bpp = vpix->bpp;
+
+ /* Get the corresponding pixel map from the table */
+ vdeb->sink_pix_map =
+ vimc_deb_pix_map_by_code(vdeb->sink_fmt.code);
+
+ /*
+ * Allocate the frame buffer. Use vmalloc to be able to
+ * allocate a large amount of memory
+ */
+ vdeb->src_frame = vmalloc(frame_size);
+ if (!vdeb->src_frame)
+ return -ENOMEM;
+
+ /* Turn the stream on in the subdevices directly connected */
+ ret = vimc_pipeline_s_stream(&vdeb->sd.entity, 1);
+ if (ret) {
+ vfree(vdeb->src_frame);
+ vdeb->src_frame = NULL;
+ return ret;
+ }
+ } else {
+ if (!vdeb->src_frame)
+ return 0;
+
+ /* Disable streaming from the pipe */
+ ret = vimc_pipeline_s_stream(&vdeb->sd.entity, 0);
+ if (ret)
+ return ret;
+
+ vfree(vdeb->src_frame);
+ vdeb->src_frame = NULL;
+ }
+
+ return 0;
+}
+
+struct v4l2_subdev_video_ops vimc_deb_video_ops = {
+ .s_stream = vimc_deb_s_stream,
+};
+
+static const struct v4l2_subdev_ops vimc_deb_ops = {
+ .pad = &vimc_deb_pad_ops,
+ .video = &vimc_deb_video_ops,
+};
+
+static unsigned int vimc_deb_get_val(const u8 *bytes,
+ const unsigned int n_bytes)
+{
+ unsigned int i;
+ unsigned int acc = 0;
+
+ for (i = 0; i < n_bytes; i++)
+ acc = acc + (bytes[i] << (8 * i));
+
+ return acc;
+}
+
+static void vimc_deb_calc_rgb_sink(struct vimc_deb_device *vdeb,
+ const u8 *frame,
+ const unsigned int lin,
+ const unsigned int col,
+ unsigned int rgb[3])
+{
+ unsigned int i, seek, wlin, wcol;
+ unsigned int n_rgb[3] = {0, 0, 0};
+
+ for (i = 0; i < 3; i++)
+ rgb[i] = 0;
+
+ /*
+ * Calculate how many we need to subtract to get to the pixel in
+ * the top left corner of the mean window (considering the current
+ * pixel as the center)
+ */
+ seek = deb_mean_win_size / 2;
+
+ /* Sum the values of the colors in the mean window */
+
+ dev_dbg(vdeb->dev,
+ "deb: %s: --- Calc pixel %dx%d, window mean %d, seek %d ---\n",
+ vdeb->sd.name, lin, col, vdeb->sink_fmt.height, seek);
+
+ /*
+ * Iterate through all the lines in the mean window, start
+ * with zero if the pixel is outside the frame and don't pass
+ * the height when the pixel is in the bottom border of the
+ * frame
+ */
+ for (wlin = seek > lin ? 0 : lin - seek;
+ wlin < lin + seek + 1 && wlin < vdeb->sink_fmt.height;
+ wlin++) {
+
+ /*
+ * Iterate through all the columns in the mean window, start
+ * with zero if the pixel is outside the frame and don't pass
+ * the width when the pixel is in the right border of the
+ * frame
+ */
+ for (wcol = seek > col ? 0 : col - seek;
+ wcol < col + seek + 1 && wcol < vdeb->sink_fmt.width;
+ wcol++) {
+ enum vimc_deb_rgb_colors color;
+ unsigned int index;
+
+ /* Check which color this pixel is */
+ color = vdeb->sink_pix_map->order[wlin % 2][wcol % 2];
+
+ index = VIMC_FRAME_INDEX(wlin, wcol,
+ vdeb->sink_fmt.width,
+ vdeb->sink_bpp);
+
+ dev_dbg(vdeb->dev,
+ "deb: %s: RGB CALC: frame index %d, win pos %dx%d, color %d\n",
+ vdeb->sd.name, index, wlin, wcol, color);
+
+ /* Get its value */
+ rgb[color] = rgb[color] +
+ vimc_deb_get_val(&frame[index], vdeb->sink_bpp);
+
+ /* Save how many values we already added */
+ n_rgb[color]++;
+
+ dev_dbg(vdeb->dev, "deb: %s: RGB CALC: val %d, n %d\n",
+ vdeb->sd.name, rgb[color], n_rgb[color]);
+ }
+ }
+
+ /* Calculate the mean */
+ for (i = 0; i < 3; i++) {
+ dev_dbg(vdeb->dev,
+ "deb: %s: PRE CALC: %dx%d Color %d, val %d, n %d\n",
+ vdeb->sd.name, lin, col, i, rgb[i], n_rgb[i]);
+
+ if (n_rgb[i])
+ rgb[i] = rgb[i] / n_rgb[i];
+
+ dev_dbg(vdeb->dev,
+ "deb: %s: FINAL CALC: %dx%d Color %d, val %d\n",
+ vdeb->sd.name, lin, col, i, rgb[i]);
+ }
+}
+
+static void vimc_deb_process_frame(struct vimc_ent_device *ved,
+ struct media_pad *sink,
+ const void *sink_frame)
+{
+ struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
+ ved);
+ unsigned int rgb[3];
+ unsigned int i, j;
+
+ /* If the stream in this node is not active, just return */
+ if (!vdeb->src_frame)
+ return;
+
+ for (i = 0; i < vdeb->sink_fmt.height; i++)
+ for (j = 0; j < vdeb->sink_fmt.width; j++) {
+ vimc_deb_calc_rgb_sink(vdeb, sink_frame, i, j, rgb);
+ vdeb->set_rgb_src(vdeb, i, j, rgb);
+ }
+
+ /* Propagate the frame through all source pads */
+ for (i = 1; i < vdeb->sd.entity.num_pads; i++) {
+ struct media_pad *pad = &vdeb->sd.entity.pads[i];
+
+ vimc_propagate_frame(pad, vdeb->src_frame);
+ }
+}
+
+static void vimc_deb_comp_unbind(struct device *comp, struct device *master,
+ void *master_data)
+{
+ struct vimc_ent_device *ved = dev_get_drvdata(comp);
+ struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device,
+ ved);
+
+ vimc_ent_sd_unregister(ved, &vdeb->sd);
+ kfree(vdeb);
+}
+
+static int vimc_deb_comp_bind(struct device *comp, struct device *master,
+ void *master_data)
+{
+ struct v4l2_device *v4l2_dev = master_data;
+ char *name = comp->platform_data;
+ struct vimc_deb_device *vdeb;
+ int ret;
+
+ /* Allocate the vdeb struct */
+ vdeb = kzalloc(sizeof(*vdeb), GFP_KERNEL);
+ if (!vdeb)
+ return -ENOMEM;
+
+ /* Initialize ved and sd */
+ ret = vimc_ent_sd_register(&vdeb->ved, &vdeb->sd, v4l2_dev, name,
+ MEDIA_ENT_F_ATV_DECODER, 2,
+ (const unsigned long[2]) {MEDIA_PAD_FL_SINK,
+ MEDIA_PAD_FL_SOURCE},
+ &vimc_deb_ops);
+ if (ret) {
+ kfree(vdeb);
+ return ret;
+ }
+
+ vdeb->ved.process_frame = vimc_deb_process_frame;
+ dev_set_drvdata(comp, &vdeb->ved);
+ vdeb->dev = comp;
+
+ /* Initialize the frame format */
+ vdeb->sink_fmt = sink_fmt_default;
+ /*
+ * TODO: Add support for more output formats, we only support
+ * RGB888 for now
+ * NOTE: the src format is always the same as the sink, except
+ * for the code
+ */
+ vdeb->src_code = MEDIA_BUS_FMT_RGB888_1X24;
+ vdeb->set_rgb_src = vimc_deb_set_rgb_mbus_fmt_rgb888_1x24;
+
+ return 0;
+}
+
+static const struct component_ops vimc_deb_comp_ops = {
+ .bind = vimc_deb_comp_bind,
+ .unbind = vimc_deb_comp_unbind,
+};
+
+static int vimc_deb_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &vimc_deb_comp_ops);
+}
+
+static int vimc_deb_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &vimc_deb_comp_ops);
+
+ return 0;
+}
+
+static struct platform_driver vimc_deb_pdrv = {
+ .probe = vimc_deb_probe,
+ .remove = vimc_deb_remove,
+ .driver = {
+ .name = VIMC_DEB_DRV_NAME,
+ },
+};
+
+static const struct platform_device_id vimc_deb_driver_ids[] = {
+ {
+ .name = VIMC_DEB_DRV_NAME,
+ },
+ { }
+};
+
+module_platform_driver(vimc_deb_pdrv);
+
+MODULE_DEVICE_TABLE(platform, vimc_deb_driver_ids);
+
+MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Debayer");
+MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
+MODULE_LICENSE("GPL");
--
2.7.4