1 files changed, 511 insertions, 0 deletions

diff --git a/drivers/media/test_drivers/vimc/vimc-scaler.c b/drivers/media/test_drivers/vimc/vimc-scaler.c
new file mode 100644
index 000000000000..7521439747c5
--- /dev/null
+++ b/drivers/media/test_drivers/vimc/vimc-scaler.c
@@ -0,0 +1,511 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * vimc-scaler.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/vmalloc.h>
+#include <linux/v4l2-mediabus.h>
+#include <media/v4l2-rect.h>
+#include <media/v4l2-subdev.h>
+
+#include "vimc-common.h"
+
+static unsigned int sca_mult = 3;
+module_param(sca_mult, uint, 0000);
+MODULE_PARM_DESC(sca_mult, " the image size multiplier");
+
+#define MAX_ZOOM	8
+
+#define VIMC_SCA_FMT_WIDTH_DEFAULT  640
+#define VIMC_SCA_FMT_HEIGHT_DEFAULT 480
+
+struct vimc_sca_device {
+	struct vimc_ent_device ved;
+	struct v4l2_subdev sd;
+	/* NOTE: the source fmt is the same as the sink
+	 * with the width and hight multiplied by mult
+	 */
+	struct v4l2_mbus_framefmt sink_fmt;
+	struct v4l2_rect crop_rect;
+	/* Values calculated when the stream starts */
+	u8 *src_frame;
+	unsigned int src_line_size;
+	unsigned int bpp;
+	struct media_pad pads[2];
+};
+
+static const struct v4l2_mbus_framefmt sink_fmt_default = {
+	.width = VIMC_SCA_FMT_WIDTH_DEFAULT,
+	.height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
+	.code = MEDIA_BUS_FMT_RGB888_1X24,
+	.field = V4L2_FIELD_NONE,
+	.colorspace = V4L2_COLORSPACE_DEFAULT,
+};
+
+static const struct v4l2_rect crop_rect_default = {
+	.width = VIMC_SCA_FMT_WIDTH_DEFAULT,
+	.height = VIMC_SCA_FMT_HEIGHT_DEFAULT,
+	.top = 0,
+	.left = 0,
+};
+
+static const struct v4l2_rect crop_rect_min = {
+	.width = VIMC_FRAME_MIN_WIDTH,
+	.height = VIMC_FRAME_MIN_HEIGHT,
+	.top = 0,
+	.left = 0,
+};
+
+static struct v4l2_rect
+vimc_sca_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
+{
+	/* Get the crop bounds to clamp the crop rectangle correctly */
+	struct v4l2_rect r = {
+		.left = 0,
+		.top = 0,
+		.width = sink_fmt->width,
+		.height = sink_fmt->height,
+	};
+	return r;
+}
+
+static void vimc_sca_adjust_sink_crop(struct v4l2_rect *r,
+				      const struct v4l2_mbus_framefmt *sink_fmt)
+{
+	const struct v4l2_rect sink_rect =
+		vimc_sca_get_crop_bound_sink(sink_fmt);
+
+	/* Disallow rectangles smaller than the minimal one. */
+	v4l2_rect_set_min_size(r, &crop_rect_min);
+	v4l2_rect_map_inside(r, &sink_rect);
+}
+
+static int vimc_sca_init_cfg(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_pad_config *cfg)
+{
+	struct v4l2_mbus_framefmt *mf;
+	struct v4l2_rect *r;
+	unsigned int i;
+
+	mf = v4l2_subdev_get_try_format(sd, cfg, 0);
+	*mf = sink_fmt_default;
+
+	r = v4l2_subdev_get_try_crop(sd, cfg, 0);
+	*r = crop_rect_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 (VIMC_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);
+	struct v4l2_rect *crop_rect;
+
+	/* Get the current sink format */
+	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+		format->format = *v4l2_subdev_get_try_format(sd, cfg, 0);
+		crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
+	} else {
+		format->format = vsca->sink_fmt;
+		crop_rect = &vsca->crop_rect;
+	}
+
+	/* Scale the frame size for the source pad */
+	if (VIMC_IS_SRC(format->pad)) {
+		format->format.width = crop_rect->width * sca_mult;
+		format->format.height = crop_rect->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;
+
+	vimc_colorimetry_clamp(fmt);
+}
+
+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;
+	struct v4l2_rect *crop_rect;
+
+	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;
+		crop_rect = &vsca->crop_rect;
+	} else {
+		sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+		crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
+	}
+
+	/*
+	 * Do not change the format of the source pad,
+	 * it is propagated from the sink
+	 */
+	if (VIMC_IS_SRC(fmt->pad)) {
+		fmt->format = *sink_fmt;
+		fmt->format.width = crop_rect->width * sca_mult;
+		fmt->format.height = crop_rect->height * sca_mult;
+	} else {
+		/* Set the new format in the sink pad */
+		vimc_sca_adjust_sink_fmt(&fmt->format);
+
+		dev_dbg(vsca->ved.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;
+
+		/* Do the crop, but respect the current bounds */
+		vimc_sca_adjust_sink_crop(crop_rect, sink_fmt);
+	}
+
+	return 0;
+}
+
+static int vimc_sca_get_selection(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_pad_config *cfg,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *sink_fmt;
+	struct v4l2_rect *crop_rect;
+
+	if (VIMC_IS_SRC(sel->pad))
+		return -EINVAL;
+
+	if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		sink_fmt = &vsca->sink_fmt;
+		crop_rect = &vsca->crop_rect;
+	} else {
+		sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+		crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
+	}
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		sel->r = *crop_rect;
+		break;
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r = vimc_sca_get_crop_bound_sink(sink_fmt);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int vimc_sca_set_selection(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_pad_config *cfg,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *sink_fmt;
+	struct v4l2_rect *crop_rect;
+
+	if (VIMC_IS_SRC(sel->pad))
+		return -EINVAL;
+
+	if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		/* Do not change the format while stream is on */
+		if (vsca->src_frame)
+			return -EBUSY;
+
+		crop_rect = &vsca->crop_rect;
+		sink_fmt = &vsca->sink_fmt;
+	} else {
+		crop_rect = v4l2_subdev_get_try_crop(sd, cfg, 0);
+		sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+	}
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		/* Do the crop, but respect the current bounds */
+		vimc_sca_adjust_sink_crop(&sel->r, sink_fmt);
+		*crop_rect = sel->r;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	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,
+	.get_selection		= vimc_sca_get_selection,
+	.set_selection		= vimc_sca_set_selection,
+};
+
+static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
+
+	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->crop_rect.width *
+				      sca_mult * vsca->bpp;
+
+		/* Calculate the frame size of the source pad */
+		frame_size = vsca->src_line_size * vsca->crop_rect.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;
+
+	} else {
+		if (!vsca->src_frame)
+			return 0;
+
+		vfree(vsca->src_frame);
+		vsca->src_frame = NULL;
+	}
+
+	return 0;
+}
+
+static const 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,
+			       unsigned int lin, unsigned int col,
+			       const u8 *const sink_frame)
+{
+	const struct v4l2_rect crop_rect = vsca->crop_rect;
+	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->ved.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
+	 */
+	lin -= crop_rect.top;
+	col -= crop_rect.left;
+	index = VIMC_FRAME_INDEX(lin * sca_mult, col * sca_mult,
+				 crop_rect.width * sca_mult, vsca->bpp);
+
+	dev_dbg(vsca->ved.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->ved.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)
+{
+	const struct v4l2_rect r = vsca->crop_rect;
+	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 = r.top; i < r.top + r.height; i++)
+		for (j = r.left; j < r.left + r.width; j++)
+			vimc_sca_scale_pix(vsca, i, j, sink_frame);
+}
+
+static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
+				    const void *sink_frame)
+{
+	struct vimc_sca_device *vsca = container_of(ved, struct vimc_sca_device,
+						    ved);
+
+	/* If the stream in this node is not active, just return */
+	if (!vsca->src_frame)
+		return ERR_PTR(-EINVAL);
+
+	vimc_sca_fill_src_frame(vsca, sink_frame);
+
+	return vsca->src_frame;
+};
+
+void vimc_sca_release(struct vimc_ent_device *ved)
+{
+	struct vimc_sca_device *vsca =
+		container_of(ved, struct vimc_sca_device, ved);
+
+	media_entity_cleanup(vsca->ved.ent);
+	kfree(vsca);
+}
+
+struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
+				     const char *vcfg_name)
+{
+	struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
+	struct vimc_sca_device *vsca;
+	int ret;
+
+	/* Allocate the vsca struct */
+	vsca = kzalloc(sizeof(*vsca), GFP_KERNEL);
+	if (!vsca)
+		return NULL;
+
+	/* Initialize ved and sd */
+	vsca->pads[0].flags = MEDIA_PAD_FL_SINK;
+	vsca->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+
+	ret = vimc_ent_sd_register(&vsca->ved, &vsca->sd, v4l2_dev,
+				   vcfg_name,
+				   MEDIA_ENT_F_PROC_VIDEO_SCALER, 2,
+				   vsca->pads, &vimc_sca_ops);
+	if (ret) {
+		kfree(vsca);
+		return NULL;
+	}
+
+	vsca->ved.process_frame = vimc_sca_process_frame;
+	vsca->ved.dev = vimc->mdev.dev;
+
+	/* Initialize the frame format */
+	vsca->sink_fmt = sink_fmt_default;
+
+	/* Initialize the crop selection */
+	vsca->crop_rect = crop_rect_default;
+
+	return &vsca->ved;
+}