[media] v4l: s5p-tv: add TV Mixer driver for Samsung S5P platform

Add driver for TV Mixer on Samsung platforms from S5P family.
Mixer is responsible for merging images from three layers and
passing result to the output.

Drivers are using:
- v4l2 framework
- videobuf2
- runtime PM

Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/media/video/s5p-tv/mixer_grp_layer.c b/drivers/media/video/s5p-tv/mixer_grp_layer.c
new file mode 100644
index 000000000000..58f0ba49580f
--- /dev/null
+++ b/drivers/media/video/s5p-tv/mixer_grp_layer.c
@@ -0,0 +1,185 @@
+/*
+ * Samsung TV Mixer driver
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *
+ * Tomasz Stanislawski, <t.stanislaws@samsung.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 Foundiation. either version 2 of the License,
+ * or (at your option) any later version
+ */
+
+#include "mixer.h"
+
+#include <media/videobuf2-dma-contig.h>
+
+/* FORMAT DEFINITIONS */
+
+static const struct mxr_format mxr_fb_fmt_rgb565 = {
+	.name = "RGB565",
+	.fourcc = V4L2_PIX_FMT_RGB565,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+	.num_planes = 1,
+	.plane = {
+		{ .width = 1, .height = 1, .size = 2 },
+	},
+	.num_subframes = 1,
+	.cookie = 4,
+};
+
+static const struct mxr_format mxr_fb_fmt_argb1555 = {
+	.name = "ARGB1555",
+	.num_planes = 1,
+	.fourcc = V4L2_PIX_FMT_RGB555,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+	.plane = {
+		{ .width = 1, .height = 1, .size = 2 },
+	},
+	.num_subframes = 1,
+	.cookie = 5,
+};
+
+static const struct mxr_format mxr_fb_fmt_argb4444 = {
+	.name = "ARGB4444",
+	.num_planes = 1,
+	.fourcc = V4L2_PIX_FMT_RGB444,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+	.plane = {
+		{ .width = 1, .height = 1, .size = 2 },
+	},
+	.num_subframes = 1,
+	.cookie = 6,
+};
+
+static const struct mxr_format mxr_fb_fmt_argb8888 = {
+	.name = "ARGB8888",
+	.fourcc = V4L2_PIX_FMT_BGR32,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+	.num_planes = 1,
+	.plane = {
+		{ .width = 1, .height = 1, .size = 4 },
+	},
+	.num_subframes = 1,
+	.cookie = 7,
+};
+
+static const struct mxr_format *mxr_graph_format[] = {
+	&mxr_fb_fmt_rgb565,
+	&mxr_fb_fmt_argb1555,
+	&mxr_fb_fmt_argb4444,
+	&mxr_fb_fmt_argb8888,
+};
+
+/* AUXILIARY CALLBACKS */
+
+static void mxr_graph_layer_release(struct mxr_layer *layer)
+{
+	mxr_base_layer_unregister(layer);
+	mxr_base_layer_release(layer);
+}
+
+static void mxr_graph_buffer_set(struct mxr_layer *layer,
+	struct mxr_buffer *buf)
+{
+	dma_addr_t addr = 0;
+
+	if (buf)
+		addr = vb2_dma_contig_plane_paddr(&buf->vb, 0);
+	mxr_reg_graph_buffer(layer->mdev, layer->idx, addr);
+}
+
+static void mxr_graph_stream_set(struct mxr_layer *layer, int en)
+{
+	mxr_reg_graph_layer_stream(layer->mdev, layer->idx, en);
+}
+
+static void mxr_graph_format_set(struct mxr_layer *layer)
+{
+	mxr_reg_graph_format(layer->mdev, layer->idx,
+		layer->fmt, &layer->geo);
+}
+
+static void mxr_graph_fix_geometry(struct mxr_layer *layer)
+{
+	struct mxr_geometry *geo = &layer->geo;
+
+	/* limit to boundary size */
+	geo->src.full_width = clamp_val(geo->src.full_width, 1, 32767);
+	geo->src.full_height = clamp_val(geo->src.full_height, 1, 2047);
+	geo->src.width = clamp_val(geo->src.width, 1, geo->src.full_width);
+	geo->src.width = min(geo->src.width, 2047U);
+	/* not possible to crop of Y axis */
+	geo->src.y_offset = min(geo->src.y_offset, geo->src.full_height - 1);
+	geo->src.height = geo->src.full_height - geo->src.y_offset;
+	/* limitting offset */
+	geo->src.x_offset = min(geo->src.x_offset,
+		geo->src.full_width - geo->src.width);
+
+	/* setting position in output */
+	geo->dst.width = min(geo->dst.width, geo->dst.full_width);
+	geo->dst.height = min(geo->dst.height, geo->dst.full_height);
+
+	/* Mixer supports only 1x and 2x scaling */
+	if (geo->dst.width >= 2 * geo->src.width) {
+		geo->x_ratio = 1;
+		geo->dst.width = 2 * geo->src.width;
+	} else {
+		geo->x_ratio = 0;
+		geo->dst.width = geo->src.width;
+	}
+
+	if (geo->dst.height >= 2 * geo->src.height) {
+		geo->y_ratio = 1;
+		geo->dst.height = 2 * geo->src.height;
+	} else {
+		geo->y_ratio = 0;
+		geo->dst.height = geo->src.height;
+	}
+
+	geo->dst.x_offset = min(geo->dst.x_offset,
+		geo->dst.full_width - geo->dst.width);
+	geo->dst.y_offset = min(geo->dst.y_offset,
+		geo->dst.full_height - geo->dst.height);
+}
+
+/* PUBLIC API */
+
+struct mxr_layer *mxr_graph_layer_create(struct mxr_device *mdev, int idx)
+{
+	struct mxr_layer *layer;
+	int ret;
+	struct mxr_layer_ops ops = {
+		.release = mxr_graph_layer_release,
+		.buffer_set = mxr_graph_buffer_set,
+		.stream_set = mxr_graph_stream_set,
+		.format_set = mxr_graph_format_set,
+		.fix_geometry = mxr_graph_fix_geometry,
+	};
+	char name[32];
+
+	sprintf(name, "graph%d", idx);
+
+	layer = mxr_base_layer_create(mdev, idx, name, &ops);
+	if (layer == NULL) {
+		mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
+		goto fail;
+	}
+
+	layer->fmt_array = mxr_graph_format;
+	layer->fmt_array_size = ARRAY_SIZE(mxr_graph_format);
+
+	ret = mxr_base_layer_register(layer);
+	if (ret)
+		goto fail_layer;
+
+	return layer;
+
+fail_layer:
+	mxr_base_layer_release(layer);
+
+fail:
+	return NULL;
+}
+