1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
new file mode 100644
index 000000000000..5f2c87858bfe
--- /dev/null
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Renesas RZ/G2L CRU
+ *
+ * Copyright (C) 2022 Renesas Electronics Corp.
+ */
+
+#include <linux/delay.h>
+#include <media/mipi-csi2.h>
+
+#include "rzg2l-cru.h"
+#include "rzg2l-cru-regs.h"
+
+static const struct rzg2l_cru_ip_format rzg2l_cru_ip_formats[] = {
+	{
+		.codes = {
+			MEDIA_BUS_FMT_UYVY8_1X16,
+		},
+		.datatype = MIPI_CSI2_DT_YUV422_8B,
+		.format = V4L2_PIX_FMT_UYVY,
+		.icndmr = ICnDMR_YCMODE_UYVY,
+		.yuv = true,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SBGGR8_1X8,
+		},
+		.format = V4L2_PIX_FMT_SBGGR8,
+		.datatype = MIPI_CSI2_DT_RAW8,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SGBRG8_1X8,
+		},
+		.format = V4L2_PIX_FMT_SGBRG8,
+		.datatype = MIPI_CSI2_DT_RAW8,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SGRBG8_1X8,
+		},
+		.format = V4L2_PIX_FMT_SGRBG8,
+		.datatype = MIPI_CSI2_DT_RAW8,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SRGGB8_1X8,
+		},
+		.format = V4L2_PIX_FMT_SRGGB8,
+		.datatype = MIPI_CSI2_DT_RAW8,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SBGGR10_1X10,
+			MEDIA_BUS_FMT_SGBRG10_1X10,
+			MEDIA_BUS_FMT_SGRBG10_1X10,
+			MEDIA_BUS_FMT_SRGGB10_1X10
+		},
+		.format = V4L2_PIX_FMT_RAW_CRU10,
+		.datatype = MIPI_CSI2_DT_RAW10,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SBGGR12_1X12,
+			MEDIA_BUS_FMT_SGBRG12_1X12,
+			MEDIA_BUS_FMT_SGRBG12_1X12,
+			MEDIA_BUS_FMT_SRGGB12_1X12
+		},
+		.format = V4L2_PIX_FMT_RAW_CRU12,
+		.datatype = MIPI_CSI2_DT_RAW12,
+		.icndmr = 0,
+		.yuv = false,
+	},
+	{
+		.codes = {
+			MEDIA_BUS_FMT_SBGGR14_1X14,
+			MEDIA_BUS_FMT_SGBRG14_1X14,
+			MEDIA_BUS_FMT_SGRBG14_1X14,
+			MEDIA_BUS_FMT_SRGGB14_1X14
+		},
+		.format = V4L2_PIX_FMT_RAW_CRU14,
+		.datatype = MIPI_CSI2_DT_RAW14,
+		.icndmr = 0,
+		.yuv = false,
+	},
+};
+
+const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code)
+{
+	unsigned int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(rzg2l_cru_ip_formats); i++) {
+		for (j = 0; j < ARRAY_SIZE(rzg2l_cru_ip_formats[i].codes); j++) {
+			if (rzg2l_cru_ip_formats[i].codes[j] == code)
+				return &rzg2l_cru_ip_formats[i];
+		}
+	}
+
+	return NULL;
+}
+
+const struct rzg2l_cru_ip_format *rzg2l_cru_ip_format_to_fmt(u32 format)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(rzg2l_cru_ip_formats); i++) {
+		if (rzg2l_cru_ip_formats[i].format == format)
+			return &rzg2l_cru_ip_formats[i];
+	}
+
+	return NULL;
+}
+
+const struct rzg2l_cru_ip_format *rzg2l_cru_ip_index_to_fmt(u32 index)
+{
+	if (index >= ARRAY_SIZE(rzg2l_cru_ip_formats))
+		return NULL;
+
+	return &rzg2l_cru_ip_formats[index];
+}
+
+bool rzg2l_cru_ip_fmt_supports_mbus_code(const struct rzg2l_cru_ip_format *fmt,
+					 unsigned int code)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(fmt->codes); i++)
+		if (fmt->codes[i] == code)
+			return true;
+
+	return false;
+}
+struct v4l2_mbus_framefmt *rzg2l_cru_ip_get_src_fmt(struct rzg2l_cru_dev *cru)
+{
+	struct v4l2_subdev_state *state;
+	struct v4l2_mbus_framefmt *fmt;
+
+	state = v4l2_subdev_lock_and_get_active_state(&cru->ip.subdev);
+	fmt = v4l2_subdev_state_get_format(state, 1);
+	v4l2_subdev_unlock_state(state);
+
+	return fmt;
+}
+
+static int rzg2l_cru_ip_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct rzg2l_cru_dev *cru;
+	int s_stream_ret = 0;
+	int ret;
+
+	cru = v4l2_get_subdevdata(sd);
+
+	if (!enable) {
+		ret = v4l2_subdev_call(cru->ip.remote, video, s_stream, enable);
+		if (ret)
+			s_stream_ret = ret;
+
+		ret = v4l2_subdev_call(cru->ip.remote, video, post_streamoff);
+		if (ret == -ENOIOCTLCMD)
+			ret = 0;
+		if (ret && !s_stream_ret)
+			s_stream_ret = ret;
+		rzg2l_cru_stop_image_processing(cru);
+	} else {
+		ret = v4l2_subdev_call(cru->ip.remote, video, pre_streamon, 0);
+		if (ret == -ENOIOCTLCMD)
+			ret = 0;
+		if (ret)
+			return ret;
+
+		fsleep(1000);
+
+		ret = rzg2l_cru_start_image_processing(cru);
+		if (ret) {
+			v4l2_subdev_call(cru->ip.remote, video, post_streamoff);
+			return ret;
+		}
+
+		ret = v4l2_subdev_call(cru->ip.remote, video, s_stream, enable);
+		if (!ret || ret == -ENOIOCTLCMD)
+			return 0;
+
+		s_stream_ret = ret;
+
+		v4l2_subdev_call(cru->ip.remote, video, post_streamoff);
+		rzg2l_cru_stop_image_processing(cru);
+	}
+
+	return s_stream_ret;
+}
+
+static int rzg2l_cru_ip_set_format(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state,
+				   struct v4l2_subdev_format *fmt)
+{
+	struct rzg2l_cru_dev *cru = v4l2_get_subdevdata(sd);
+	const struct rzg2l_cru_info *info = cru->info;
+	struct v4l2_mbus_framefmt *src_format;
+	struct v4l2_mbus_framefmt *sink_format;
+
+	src_format = v4l2_subdev_state_get_format(state, RZG2L_CRU_IP_SOURCE);
+	if (fmt->pad == RZG2L_CRU_IP_SOURCE) {
+		fmt->format = *src_format;
+		return 0;
+	}
+
+	sink_format = v4l2_subdev_state_get_format(state, fmt->pad);
+
+	if (!rzg2l_cru_ip_code_to_fmt(fmt->format.code))
+		sink_format->code = rzg2l_cru_ip_formats[0].codes[0];
+	else
+		sink_format->code = fmt->format.code;
+
+	sink_format->field = V4L2_FIELD_NONE;
+	sink_format->colorspace = fmt->format.colorspace;
+	sink_format->xfer_func = fmt->format.xfer_func;
+	sink_format->ycbcr_enc = fmt->format.ycbcr_enc;
+	sink_format->quantization = fmt->format.quantization;
+	sink_format->width = clamp_t(u32, fmt->format.width,
+				     RZG2L_CRU_MIN_INPUT_WIDTH, info->max_width);
+	sink_format->height = clamp_t(u32, fmt->format.height,
+				      RZG2L_CRU_MIN_INPUT_HEIGHT, info->max_height);
+
+	fmt->format = *sink_format;
+
+	/* propagate format to source pad */
+	*src_format = *sink_format;
+
+	return 0;
+}
+
+static int rzg2l_cru_ip_enum_mbus_code(struct v4l2_subdev *sd,
+				       struct v4l2_subdev_state *state,
+				       struct v4l2_subdev_mbus_code_enum *code)
+{
+	unsigned int index = code->index;
+	unsigned int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(rzg2l_cru_ip_formats); i++) {
+		const struct rzg2l_cru_ip_format *fmt = &rzg2l_cru_ip_formats[i];
+
+		for (j = 0; j < ARRAY_SIZE(fmt->codes); j++) {
+			if (!fmt->codes[j])
+				continue;
+
+			if (!index) {
+				code->code = fmt->codes[j];
+				return 0;
+			}
+
+			index--;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int rzg2l_cru_ip_enum_frame_size(struct v4l2_subdev *sd,
+					struct v4l2_subdev_state *state,
+					struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct rzg2l_cru_dev *cru = v4l2_get_subdevdata(sd);
+	const struct rzg2l_cru_info *info = cru->info;
+
+	if (fse->index != 0)
+		return -EINVAL;
+
+	if (!rzg2l_cru_ip_code_to_fmt(fse->code))
+		return -EINVAL;
+
+	fse->min_width = RZG2L_CRU_MIN_INPUT_WIDTH;
+	fse->min_height = RZG2L_CRU_MIN_INPUT_HEIGHT;
+	fse->max_width = info->max_width;
+	fse->max_height = info->max_height;
+
+	return 0;
+}
+
+static int rzg2l_cru_ip_init_state(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *sd_state)
+{
+	struct v4l2_subdev_format fmt = { .pad = RZG2L_CRU_IP_SINK, };
+
+	fmt.format.width = RZG2L_CRU_MIN_INPUT_WIDTH;
+	fmt.format.height = RZG2L_CRU_MIN_INPUT_HEIGHT;
+	fmt.format.field = V4L2_FIELD_NONE;
+	fmt.format.code = MEDIA_BUS_FMT_UYVY8_1X16;
+	fmt.format.colorspace = V4L2_COLORSPACE_SRGB;
+	fmt.format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+	fmt.format.quantization = V4L2_QUANTIZATION_DEFAULT;
+	fmt.format.xfer_func = V4L2_XFER_FUNC_DEFAULT;
+
+	return rzg2l_cru_ip_set_format(sd, sd_state, &fmt);
+}
+
+static const struct v4l2_subdev_video_ops rzg2l_cru_ip_video_ops = {
+	.s_stream = rzg2l_cru_ip_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops rzg2l_cru_ip_pad_ops = {
+	.enum_mbus_code = rzg2l_cru_ip_enum_mbus_code,
+	.enum_frame_size = rzg2l_cru_ip_enum_frame_size,
+	.get_fmt = v4l2_subdev_get_fmt,
+	.set_fmt = rzg2l_cru_ip_set_format,
+};
+
+static const struct v4l2_subdev_ops rzg2l_cru_ip_subdev_ops = {
+	.video = &rzg2l_cru_ip_video_ops,
+	.pad = &rzg2l_cru_ip_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops rzg2l_cru_ip_internal_ops = {
+	.init_state = rzg2l_cru_ip_init_state,
+};
+
+static const struct media_entity_operations rzg2l_cru_ip_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+int rzg2l_cru_ip_subdev_register(struct rzg2l_cru_dev *cru)
+{
+	struct rzg2l_cru_ip *ip = &cru->ip;
+	int ret;
+
+	ip->subdev.dev = cru->dev;
+	v4l2_subdev_init(&ip->subdev, &rzg2l_cru_ip_subdev_ops);
+	ip->subdev.internal_ops = &rzg2l_cru_ip_internal_ops;
+	v4l2_set_subdevdata(&ip->subdev, cru);
+	snprintf(ip->subdev.name, sizeof(ip->subdev.name),
+		 "cru-ip-%s", dev_name(cru->dev));
+	ip->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+	ip->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
+	ip->subdev.entity.ops = &rzg2l_cru_ip_entity_ops;
+
+	ip->pads[RZG2L_CRU_IP_SINK].flags = MEDIA_PAD_FL_SINK |
+					    MEDIA_PAD_FL_MUST_CONNECT;
+	ip->pads[RZG2L_CRU_IP_SOURCE].flags = MEDIA_PAD_FL_SOURCE |
+					      MEDIA_PAD_FL_MUST_CONNECT;
+
+	ret = media_entity_pads_init(&ip->subdev.entity, 2, ip->pads);
+	if (ret)
+		return ret;
+
+	ret = v4l2_subdev_init_finalize(&ip->subdev);
+	if (ret < 0)
+		goto entity_cleanup;
+
+	ret = v4l2_device_register_subdev(&cru->v4l2_dev, &ip->subdev);
+	if (ret < 0)
+		goto error_subdev;
+
+	return 0;
+error_subdev:
+	v4l2_subdev_cleanup(&ip->subdev);
+entity_cleanup:
+	media_entity_cleanup(&ip->subdev.entity);
+
+	return ret;
+}
+
+void rzg2l_cru_ip_subdev_unregister(struct rzg2l_cru_dev *cru)
+{
+	struct rzg2l_cru_ip *ip = &cru->ip;
+
+	media_entity_cleanup(&ip->subdev.entity);
+	v4l2_subdev_cleanup(&ip->subdev);
+	v4l2_device_unregister_subdev(&ip->subdev);
+}