1 files changed, 388 insertions, 0 deletions

diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c
new file mode 100644
index 000000000..04e4e05af
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_sru.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * vsp1_sru.c  --  R-Car VSP1 Super Resolution Unit
+ *
+ * Copyright (C) 2013 Renesas Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/device.h>
+#include <linux/gfp.h>
+
+#include <media/v4l2-subdev.h>
+
+#include "vsp1.h"
+#include "vsp1_dl.h"
+#include "vsp1_pipe.h"
+#include "vsp1_sru.h"
+
+#define SRU_MIN_SIZE				4U
+#define SRU_MAX_SIZE				8190U
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline void vsp1_sru_write(struct vsp1_sru *sru,
+				  struct vsp1_dl_body *dlb, u32 reg, u32 data)
+{
+	vsp1_dl_body_write(dlb, reg, data);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+#define V4L2_CID_VSP1_SRU_INTENSITY		(V4L2_CID_USER_BASE | 0x1001)
+
+struct vsp1_sru_param {
+	u32 ctrl0;
+	u32 ctrl2;
+};
+
+#define VI6_SRU_CTRL0_PARAMS(p0, p1)			\
+	(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) |		\
+	 ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
+
+#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8)		\
+	(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) |		\
+	 ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) |		\
+	 ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
+
+static const struct vsp1_sru_param vsp1_sru_params[] = {
+	{
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
+	}, {
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
+	}, {
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
+	}, {
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
+	}, {
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
+	}, {
+		.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
+		.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
+	},
+};
+
+static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct vsp1_sru *sru =
+		container_of(ctrl->handler, struct vsp1_sru, ctrls);
+
+	switch (ctrl->id) {
+	case V4L2_CID_VSP1_SRU_INTENSITY:
+		sru->intensity = ctrl->val;
+		break;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops sru_ctrl_ops = {
+	.s_ctrl = sru_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config sru_intensity_control = {
+	.ops = &sru_ctrl_ops,
+	.id = V4L2_CID_VSP1_SRU_INTENSITY,
+	.name = "Intensity",
+	.type = V4L2_CTRL_TYPE_INTEGER,
+	.min = 1,
+	.max = 6,
+	.def = 1,
+	.step = 1,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
+			      struct v4l2_subdev_pad_config *cfg,
+			      struct v4l2_subdev_mbus_code_enum *code)
+{
+	static const unsigned int codes[] = {
+		MEDIA_BUS_FMT_ARGB8888_1X32,
+		MEDIA_BUS_FMT_AYUV8_1X32,
+	};
+
+	return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
+					  ARRAY_SIZE(codes));
+}
+
+static int sru_enum_frame_size(struct v4l2_subdev *subdev,
+			       struct v4l2_subdev_pad_config *cfg,
+			       struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct vsp1_sru *sru = to_sru(subdev);
+	struct v4l2_subdev_pad_config *config;
+	struct v4l2_mbus_framefmt *format;
+	int ret = 0;
+
+	config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
+	if (!config)
+		return -EINVAL;
+
+	format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
+
+	mutex_lock(&sru->entity.lock);
+
+	if (fse->index || fse->code != format->code) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	if (fse->pad == SRU_PAD_SINK) {
+		fse->min_width = SRU_MIN_SIZE;
+		fse->max_width = SRU_MAX_SIZE;
+		fse->min_height = SRU_MIN_SIZE;
+		fse->max_height = SRU_MAX_SIZE;
+	} else {
+		fse->min_width = format->width;
+		fse->min_height = format->height;
+		if (format->width <= SRU_MAX_SIZE / 2 &&
+		    format->height <= SRU_MAX_SIZE / 2) {
+			fse->max_width = format->width * 2;
+			fse->max_height = format->height * 2;
+		} else {
+			fse->max_width = format->width;
+			fse->max_height = format->height;
+		}
+	}
+
+done:
+	mutex_unlock(&sru->entity.lock);
+	return ret;
+}
+
+static void sru_try_format(struct vsp1_sru *sru,
+			   struct v4l2_subdev_pad_config *config,
+			   unsigned int pad, struct v4l2_mbus_framefmt *fmt)
+{
+	struct v4l2_mbus_framefmt *format;
+	unsigned int input_area;
+	unsigned int output_area;
+
+	switch (pad) {
+	case SRU_PAD_SINK:
+		/* Default to YUV if the requested format is not supported. */
+		if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
+		    fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
+			fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
+
+		fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
+		fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
+		break;
+
+	case SRU_PAD_SOURCE:
+		/* The SRU can't perform format conversion. */
+		format = vsp1_entity_get_pad_format(&sru->entity, config,
+						    SRU_PAD_SINK);
+		fmt->code = format->code;
+
+		/*
+		 * We can upscale by 2 in both direction, but not independently.
+		 * Compare the input and output rectangles areas (avoiding
+		 * integer overflows on the output): if the requested output
+		 * area is larger than 1.5^2 the input area upscale by two,
+		 * otherwise don't scale.
+		 */
+		input_area = format->width * format->height;
+		output_area = min(fmt->width, SRU_MAX_SIZE)
+			    * min(fmt->height, SRU_MAX_SIZE);
+
+		if (fmt->width <= SRU_MAX_SIZE / 2 &&
+		    fmt->height <= SRU_MAX_SIZE / 2 &&
+		    output_area > input_area * 9 / 4) {
+			fmt->width = format->width * 2;
+			fmt->height = format->height * 2;
+		} else {
+			fmt->width = format->width;
+			fmt->height = format->height;
+		}
+		break;
+	}
+
+	fmt->field = V4L2_FIELD_NONE;
+	fmt->colorspace = V4L2_COLORSPACE_SRGB;
+}
+
+static int sru_set_format(struct v4l2_subdev *subdev,
+			  struct v4l2_subdev_pad_config *cfg,
+			  struct v4l2_subdev_format *fmt)
+{
+	struct vsp1_sru *sru = to_sru(subdev);
+	struct v4l2_subdev_pad_config *config;
+	struct v4l2_mbus_framefmt *format;
+	int ret = 0;
+
+	mutex_lock(&sru->entity.lock);
+
+	config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which);
+	if (!config) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	sru_try_format(sru, config, fmt->pad, &fmt->format);
+
+	format = vsp1_entity_get_pad_format(&sru->entity, config, fmt->pad);
+	*format = fmt->format;
+
+	if (fmt->pad == SRU_PAD_SINK) {
+		/* Propagate the format to the source pad. */
+		format = vsp1_entity_get_pad_format(&sru->entity, config,
+						    SRU_PAD_SOURCE);
+		*format = fmt->format;
+
+		sru_try_format(sru, config, SRU_PAD_SOURCE, format);
+	}
+
+done:
+	mutex_unlock(&sru->entity.lock);
+	return ret;
+}
+
+static const struct v4l2_subdev_pad_ops sru_pad_ops = {
+	.init_cfg = vsp1_entity_init_cfg,
+	.enum_mbus_code = sru_enum_mbus_code,
+	.enum_frame_size = sru_enum_frame_size,
+	.get_fmt = vsp1_subdev_get_pad_format,
+	.set_fmt = sru_set_format,
+};
+
+static const struct v4l2_subdev_ops sru_ops = {
+	.pad    = &sru_pad_ops,
+};
+
+/* -----------------------------------------------------------------------------
+ * VSP1 Entity Operations
+ */
+
+static void sru_configure_stream(struct vsp1_entity *entity,
+				 struct vsp1_pipeline *pipe,
+				 struct vsp1_dl_body *dlb)
+{
+	const struct vsp1_sru_param *param;
+	struct vsp1_sru *sru = to_sru(&entity->subdev);
+	struct v4l2_mbus_framefmt *input;
+	struct v4l2_mbus_framefmt *output;
+	u32 ctrl0;
+
+	input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					   SRU_PAD_SINK);
+	output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					    SRU_PAD_SOURCE);
+
+	if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
+		ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
+		      | VI6_SRU_CTRL0_PARAM4;
+	else
+		ctrl0 = VI6_SRU_CTRL0_PARAM3;
+
+	if (input->width != output->width)
+		ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;
+
+	param = &vsp1_sru_params[sru->intensity - 1];
+
+	ctrl0 |= param->ctrl0;
+
+	vsp1_sru_write(sru, dlb, VI6_SRU_CTRL0, ctrl0);
+	vsp1_sru_write(sru, dlb, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
+	vsp1_sru_write(sru, dlb, VI6_SRU_CTRL2, param->ctrl2);
+}
+
+static unsigned int sru_max_width(struct vsp1_entity *entity,
+				  struct vsp1_pipeline *pipe)
+{
+	struct vsp1_sru *sru = to_sru(&entity->subdev);
+	struct v4l2_mbus_framefmt *input;
+	struct v4l2_mbus_framefmt *output;
+
+	input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					   SRU_PAD_SINK);
+	output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					    SRU_PAD_SOURCE);
+
+	if (input->width != output->width)
+		return 512;
+	else
+		return 256;
+}
+
+static void sru_partition(struct vsp1_entity *entity,
+			  struct vsp1_pipeline *pipe,
+			  struct vsp1_partition *partition,
+			  unsigned int partition_idx,
+			  struct vsp1_partition_window *window)
+{
+	struct vsp1_sru *sru = to_sru(&entity->subdev);
+	struct v4l2_mbus_framefmt *input;
+	struct v4l2_mbus_framefmt *output;
+
+	input = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					   SRU_PAD_SINK);
+	output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
+					    SRU_PAD_SOURCE);
+
+	/* Adapt if SRUx2 is enabled */
+	if (input->width != output->width) {
+		window->width /= 2;
+		window->left /= 2;
+	}
+
+	partition->sru = *window;
+}
+
+static const struct vsp1_entity_operations sru_entity_ops = {
+	.configure_stream = sru_configure_stream,
+	.max_width = sru_max_width,
+	.partition = sru_partition,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
+{
+	struct vsp1_sru *sru;
+	int ret;
+
+	sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
+	if (sru == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	sru->entity.ops = &sru_entity_ops;
+	sru->entity.type = VSP1_ENTITY_SRU;
+
+	ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops,
+			       MEDIA_ENT_F_PROC_VIDEO_SCALER);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	/* Initialize the control handler. */
+	v4l2_ctrl_handler_init(&sru->ctrls, 1);
+	v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
+
+	sru->intensity = 1;
+
+	sru->entity.subdev.ctrl_handler = &sru->ctrls;
+
+	if (sru->ctrls.error) {
+		dev_err(vsp1->dev, "sru: failed to initialize controls\n");
+		ret = sru->ctrls.error;
+		vsp1_entity_destroy(&sru->entity);
+		return ERR_PTR(ret);
+	}
+
+	return sru;
+}