Implement scaler and integrated with the core

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

---

Changes in v3:
[media] vimc: sca: Add scaler
        - 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
        - s/thought/through
        - 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: sca: Add scaler
        - Add function MEDIA_ENT_F_IO_V4L
        - remove v4l2_dev and dev
        - s/sink_mbus_fmt/sink_fmt
        - remove BUG_ON, remove redundant if else, rewrite TODO, check end of 
enum
        - rm src_width/height, enum fsize with min and max values
        - set/try fmt
        - remove unecessary include freezer.h
        - core: add bayer boolean in pixel table
        - coding style
        - fix bug in enum frame size
        - 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 sca_mult as a parameter of the module
        - check set_fmt default parameters for quantization, colorspace ...
        - add more dev_dbg


---
 drivers/media/platform/vimc/Makefile      |   3 +-
 drivers/media/platform/vimc/vimc-common.c |  27 ++
 drivers/media/platform/vimc/vimc-common.h |   1 +
 drivers/media/platform/vimc/vimc-scaler.c | 469 ++++++++++++++++++++++++++++++
 4 files changed, 499 insertions(+), 1 deletion(-)
 create mode 100644 drivers/media/platform/vimc/vimc-scaler.c

diff --git a/drivers/media/platform/vimc/Makefile 
b/drivers/media/platform/vimc/Makefile
index 4fba8ef..68c5d98 100644
--- a/drivers/media/platform/vimc/Makefile
+++ b/drivers/media/platform/vimc/Makefile
@@ -2,7 +2,8 @@ vimc-objs := vimc-core.o
 vimc_capture-objs := vimc-capture.o
 vimc_common-objs := vimc-common.o
 vimc_debayer-objs := vimc-debayer.o
+vimc_scaler-objs := vimc-scaler.o
 vimc_sensor-objs := vimc-sensor.o
 
 obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc_capture.o vimc_common.o vimc-debayer.o 
\
-                               vimc_sensor.o
+                               vimc_scaler.o vimc_sensor.o
diff --git a/drivers/media/platform/vimc/vimc-common.c 
b/drivers/media/platform/vimc/vimc-common.c
index d5ed387..68887d7 100644
--- a/drivers/media/platform/vimc/vimc-common.c
+++ b/drivers/media/platform/vimc/vimc-common.c
@@ -20,6 +20,10 @@
 
 #include "vimc-common.h"
 
+/*
+ * NOTE: non-bayer formats need to come first (necessary for enum_mbus_code
+ * in the scaler)
+ */
 static const struct vimc_pix_map vimc_pix_map_list[] = {
        /* TODO: add all missing formats */
 
@@ -28,16 +32,19 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
                .code = MEDIA_BUS_FMT_BGR888_1X24,
                .pixelformat = V4L2_PIX_FMT_BGR24,
                .bpp = 3,
+               .bayer = false,
        },
        {
                .code = MEDIA_BUS_FMT_RGB888_1X24,
                .pixelformat = V4L2_PIX_FMT_RGB24,
                .bpp = 3,
+               .bayer = false,
        },
        {
                .code = MEDIA_BUS_FMT_ARGB8888_1X32,
                .pixelformat = V4L2_PIX_FMT_ARGB32,
                .bpp = 4,
+               .bayer = false,
        },
 
        /* Bayer formats */
@@ -45,41 +52,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
                .code = MEDIA_BUS_FMT_SBGGR8_1X8,
                .pixelformat = V4L2_PIX_FMT_SBGGR8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGBRG8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGBRG8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGRBG8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGRBG8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SRGGB8_1X8,
                .pixelformat = V4L2_PIX_FMT_SRGGB8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SBGGR10_1X10,
                .pixelformat = V4L2_PIX_FMT_SBGGR10,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGBRG10_1X10,
                .pixelformat = V4L2_PIX_FMT_SGBRG10,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGRBG10_1X10,
                .pixelformat = V4L2_PIX_FMT_SGRBG10,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SRGGB10_1X10,
                .pixelformat = V4L2_PIX_FMT_SRGGB10,
                .bpp = 2,
+               .bayer = true,
        },
 
        /* 10bit raw bayer a-law compressed to 8 bits */
@@ -87,21 +102,25 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
                .code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
                .pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
                .pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
                .bpp = 1,
+               .bayer = true,
        },
 
        /* 10bit raw bayer DPCM compressed to 8 bits */
@@ -109,41 +128,49 @@ static const struct vimc_pix_map vimc_pix_map_list[] = {
                .code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
                .pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
                .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
                .pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
                .bpp = 1,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SBGGR12_1X12,
                .pixelformat = V4L2_PIX_FMT_SBGGR12,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGBRG12_1X12,
                .pixelformat = V4L2_PIX_FMT_SGBRG12,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SGRBG12_1X12,
                .pixelformat = V4L2_PIX_FMT_SGRBG12,
                .bpp = 2,
+               .bayer = true,
        },
        {
                .code = MEDIA_BUS_FMT_SRGGB12_1X12,
                .pixelformat = V4L2_PIX_FMT_SRGGB12,
                .bpp = 2,
+               .bayer = true,
        },
 };
 
diff --git a/drivers/media/platform/vimc/vimc-common.h 
b/drivers/media/platform/vimc/vimc-common.h
index c63d51f..e1687f0 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -45,6 +45,7 @@ struct vimc_pix_map {
        unsigned int code;
        unsigned int bpp;
        u32 pixelformat;
+       bool bayer;
 };
 
 /**
diff --git a/drivers/media/platform/vimc/vimc-scaler.c 
b/drivers/media/platform/vimc/vimc-scaler.c
new file mode 100644
index 0000000..c98ced2
--- /dev/null
+++ b/drivers/media/platform/vimc/vimc-scaler.c
@@ -0,0 +1,469 @@
+/*
+ * vimc-scaler.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornaz...@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_SCA_DRV_NAME "vimc-scaler"
+
+static unsigned int sca_mult = 3;
+module_param(sca_mult, uint, 0000);
+MODULE_PARM_DESC(sca_mult, " the image size multiplier");
+
+#define IS_SINK(pad)   (!pad)
+#define IS_SRC(pad)    (pad)
+#define MAX_ZOOM       8
+
+struct vimc_sca_device {
+       struct vimc_ent_device ved;
+       struct v4l2_subdev sd;
+       struct device *dev;
+       /* NOTE: the source fmt is the same as the sink
+        * with the width and hight multiplied by mult
+        */
+       struct v4l2_mbus_framefmt sink_fmt;
+       /* Values calculated when the stream starts */
+       u8 *src_frame;
+       unsigned int src_line_size;
+       unsigned int 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 int vimc_sca_init_cfg(struct v4l2_subdev *sd,
+                            struct v4l2_subdev_pad_config *cfg)
+{
+       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->width = mf->width * sca_mult;
+               mf->height = mf->height * sca_mult;
+       }
+
+       return 0;
+}
+
+static int vimc_sca_enum_mbus_code(struct v4l2_subdev *sd,
+                                  struct v4l2_subdev_pad_config *cfg,
+                                  struct v4l2_subdev_mbus_code_enum *code)
+{
+       const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
+
+       /* We don't support bayer format */
+       if (!vpix || vpix->bayer)
+               return -EINVAL;
+
+       code->code = vpix->code;
+
+       return 0;
+}
+
+static int vimc_sca_enum_frame_size(struct v4l2_subdev *sd,
+                                   struct v4l2_subdev_pad_config *cfg,
+                                   struct v4l2_subdev_frame_size_enum *fse)
+{
+       const struct vimc_pix_map *vpix;
+
+       if (fse->index)
+               return -EINVAL;
+
+       /* Only accept code in the pix map table in non bayer format */
+       vpix = vimc_pix_map_by_code(fse->code);
+       if (!vpix || vpix->bayer)
+               return -EINVAL;
+
+       fse->min_width = VIMC_FRAME_MIN_WIDTH;
+       fse->min_height = VIMC_FRAME_MIN_HEIGHT;
+
+       if (IS_SINK(fse->pad)) {
+               fse->max_width = VIMC_FRAME_MAX_WIDTH;
+               fse->max_height = VIMC_FRAME_MAX_HEIGHT;
+       } else {
+               fse->max_width = VIMC_FRAME_MAX_WIDTH * MAX_ZOOM;
+               fse->max_height = VIMC_FRAME_MAX_HEIGHT * MAX_ZOOM;
+       }
+
+       return 0;
+}
+
+static int vimc_sca_get_fmt(struct v4l2_subdev *sd,
+                           struct v4l2_subdev_pad_config *cfg,
+                           struct v4l2_subdev_format *format)
+{
+       struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
+
+       /* Get the current sink format */
+       format->format = (format->which == V4L2_SUBDEV_FORMAT_TRY) ?
+                        *v4l2_subdev_get_try_format(sd, cfg, 0) :
+                        vsca->sink_fmt;
+
+       /* Scale the frame size for the source pad */
+       if (IS_SRC(format->pad)) {
+               format->format.width = vsca->sink_fmt.width * sca_mult;
+               format->format.height = vsca->sink_fmt.height * sca_mult;
+       }
+
+       return 0;
+}
+
+static void vimc_sca_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt)
+{
+       const struct vimc_pix_map *vpix;
+
+       /* Only accept code in the pix map table in non bayer format */
+       vpix = vimc_pix_map_by_code(fmt->code);
+       if (!vpix || vpix->bayer)
+               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_sca_set_fmt(struct v4l2_subdev *sd,
+                           struct v4l2_subdev_pad_config *cfg,
+                           struct v4l2_subdev_format *fmt)
+{
+       struct vimc_sca_device *vsca = 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 (vsca->src_frame)
+                       return -EBUSY;
+
+               sink_fmt = &vsca->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;
+               fmt->format.width = sink_fmt->width * sca_mult;
+               fmt->format.height = sink_fmt->height * sca_mult;
+       } else {
+               /* Set the new format in the sink pad */
+               vimc_sca_adjust_sink_fmt(&fmt->format);
+
+               dev_dbg(vsca->dev, "%s: sink format update: "
+                       "old:%dx%d (0x%x, %d, %d, %d, %d) "
+                       "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsca->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_sca_pad_ops = {
+       .init_cfg               = vimc_sca_init_cfg,
+       .enum_mbus_code         = vimc_sca_enum_mbus_code,
+       .enum_frame_size        = vimc_sca_enum_frame_size,
+       .get_fmt                = vimc_sca_get_fmt,
+       .set_fmt                = vimc_sca_set_fmt,
+};
+
+static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
+{
+       struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
+       int ret;
+
+       if (enable) {
+               const struct vimc_pix_map *vpix;
+               unsigned int frame_size;
+
+               if (vsca->src_frame)
+                       return 0;
+
+               /* Save the bytes per pixel of the sink */
+               vpix = vimc_pix_map_by_code(vsca->sink_fmt.code);
+               vsca->bpp = vpix->bpp;
+
+               /* Calculate the width in bytes of the src frame */
+               vsca->src_line_size = vsca->sink_fmt.width *
+                                     sca_mult * vsca->bpp;
+
+               /* Calculate the frame size of the source pad */
+               frame_size = vsca->src_line_size * vsca->sink_fmt.height *
+                            sca_mult;
+
+               /* Allocate the frame buffer. Use vmalloc to be able to
+                * allocate a large amount of memory
+                */
+               vsca->src_frame = vmalloc(frame_size);
+               if (!vsca->src_frame)
+                       return -ENOMEM;
+
+               /* Turn the stream on in the subdevices directly connected */
+               ret = vimc_pipeline_s_stream(&vsca->sd.entity, 1);
+               if (ret) {
+                       vfree(vsca->src_frame);
+                       vsca->src_frame = NULL;
+                       return ret;
+               }
+       } else {
+               if (!vsca->src_frame)
+                       return 0;
+
+               /* Disable streaming from the pipe */
+               ret = vimc_pipeline_s_stream(&vsca->sd.entity, 0);
+               if (ret)
+                       return ret;
+
+               vfree(vsca->src_frame);
+               vsca->src_frame = NULL;
+       }
+
+       return 0;
+}
+
+struct v4l2_subdev_video_ops vimc_sca_video_ops = {
+       .s_stream = vimc_sca_s_stream,
+};
+
+static const struct v4l2_subdev_ops vimc_sca_ops = {
+       .pad = &vimc_sca_pad_ops,
+       .video = &vimc_sca_video_ops,
+};
+
+static void vimc_sca_fill_pix(u8 *const ptr,
+                             const u8 *const pixel,
+                             const unsigned int bpp)
+{
+       unsigned int i;
+
+       /* copy the pixel to the pointer */
+       for (i = 0; i < bpp; i++)
+               ptr[i] = pixel[i];
+}
+
+static void vimc_sca_scale_pix(const struct vimc_sca_device *const vsca,
+                              const unsigned int lin, const unsigned int col,
+                              const u8 *const sink_frame)
+{
+       unsigned int i, j, index;
+       const u8 *pixel;
+
+       /* Point to the pixel value in position (lin, col) in the sink frame */
+       index = VIMC_FRAME_INDEX(lin, col,
+                                vsca->sink_fmt.width,
+                                vsca->bpp);
+       pixel = &sink_frame[index];
+
+       dev_dbg(vsca->dev,
+               "sca: %s: --- scale_pix sink pos %dx%d, index %d ---\n",
+               vsca->sd.name, lin, col, index);
+
+       /* point to the place we are going to put the first pixel
+        * in the scaled src frame
+        */
+       index = VIMC_FRAME_INDEX(lin * sca_mult, col * sca_mult,
+                                vsca->sink_fmt.width * sca_mult, vsca->bpp);
+
+       dev_dbg(vsca->dev, "sca: %s: scale_pix src pos %dx%d, index %d\n",
+               vsca->sd.name, lin * sca_mult, col * sca_mult, index);
+
+       /* Repeat this pixel mult times */
+       for (i = 0; i < sca_mult; i++) {
+               /* Iterate through each beginning of a
+                * pixel repetition in a line
+                */
+               for (j = 0; j < sca_mult * vsca->bpp; j += vsca->bpp) {
+                       dev_dbg(vsca->dev,
+                               "sca: %s: sca: scale_pix src pos %d\n",
+                               vsca->sd.name, index + j);
+
+                       /* copy the pixel to the position index + j */
+                       vimc_sca_fill_pix(&vsca->src_frame[index + j],
+                                         pixel, vsca->bpp);
+               }
+
+               /* move the index to the next line */
+               index += vsca->src_line_size;
+       }
+}
+
+static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
+                                   const u8 *const sink_frame)
+{
+       unsigned int i, j;
+
+       /* Scale each pixel from the original sink frame */
+       /* TODO: implement scale down, only scale up is supported for now */
+       for (i = 0; i < vsca->sink_fmt.height; i++)
+               for (j = 0; j < vsca->sink_fmt.width; j++)
+                       vimc_sca_scale_pix(vsca, i, j, sink_frame);
+}
+
+static void vimc_sca_process_frame(struct vimc_ent_device *ved,
+                                  struct media_pad *sink,
+                                  const void *sink_frame)
+{
+       struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
+                                                   ved);
+       unsigned int i;
+
+       /* If the stream in this node is not active, just return */
+       if (!vsca->src_frame)
+               return;
+
+       vimc_sca_fill_src_frame(vsca, sink_frame);
+
+       /* Propagate the frame through all source pads */
+       for (i = 1; i < vsca->sd.entity.num_pads; i++) {
+               struct media_pad *pad = &vsca->sd.entity.pads[i];
+
+               vimc_propagate_frame(pad, vsca->src_frame);
+       }
+};
+
+static void vimc_sca_comp_unbind(struct device *comp, struct device *master,
+                                void *master_data)
+{
+       struct vimc_ent_device *ved = dev_get_drvdata(comp);
+       struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
+                                                   ved);
+
+       vimc_ent_sd_unregister(ved, &vsca->sd);
+       kfree(vsca);
+}
+
+
+static int vimc_sca_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_sca_device *vsca;
+       int ret;
+
+       /* Allocate the vsca struct */
+       vsca = kzalloc(sizeof(*vsca), GFP_KERNEL);
+       if (!vsca)
+               return -ENOMEM;
+
+       /* Initialize ved and sd */
+       ret = vimc_ent_sd_register(&vsca->ved, &vsca->sd, v4l2_dev, name,
+                                  MEDIA_ENT_F_ATV_DECODER, 2,
+                                  (const unsigned long[2]) {MEDIA_PAD_FL_SINK,
+                                  MEDIA_PAD_FL_SOURCE},
+                                  &vimc_sca_ops);
+       if (ret) {
+               kfree(vsca);
+               return ret;
+       }
+
+       vsca->ved.process_frame = vimc_sca_process_frame;
+       dev_set_drvdata(comp, &vsca->ved);
+       vsca->dev = comp;
+
+       /* Initialize the frame format */
+       vsca->sink_fmt = sink_fmt_default;
+
+       return 0;
+}
+
+static const struct component_ops vimc_sca_comp_ops = {
+       .bind = vimc_sca_comp_bind,
+       .unbind = vimc_sca_comp_unbind,
+};
+
+static int vimc_sca_probe(struct platform_device *pdev)
+{
+       return component_add(&pdev->dev, &vimc_sca_comp_ops);
+}
+
+static int vimc_sca_remove(struct platform_device *pdev)
+{
+       component_del(&pdev->dev, &vimc_sca_comp_ops);
+
+       return 0;
+}
+
+static struct platform_driver vimc_sca_pdrv = {
+       .probe          = vimc_sca_probe,
+       .remove         = vimc_sca_remove,
+       .driver         = {
+               .name   = VIMC_SCA_DRV_NAME,
+       },
+};
+
+static const struct platform_device_id vimc_sca_driver_ids[] = {
+       {
+               .name           = VIMC_SCA_DRV_NAME,
+       },
+       { }
+};
+
+module_platform_driver(vimc_sca_pdrv);
+
+MODULE_DEVICE_TABLE(platform, vimc_sca_driver_ids);
+
+MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Scaler");
+MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornaz...@gmail.com>");
+MODULE_LICENSE("GPL");
-- 
2.7.4

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