Contributors: 5
Author Tokens Token Proportion Commits Commit Proportion
Laurent Pinchart 945 96.43% 23 82.14%
Kieran Bingham 16 1.63% 2 7.14%
Tomi Valkeinen 9 0.92% 1 3.57%
Boris Brezillon 7 0.71% 1 3.57%
Takashi Saito 3 0.31% 1 3.57%
Total 980 28 


// SPDX-License-Identifier: GPL-2.0+
/*
 * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
 *
 * Copyright (C) 2013 Renesas Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 */

#include <linux/device.h>
#include <linux/gfp.h>
#include <linux/mutex.h>

#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_hsit.h"

#define HSIT_MIN_SIZE				4U
#define HSIT_MAX_SIZE				8190U

/* -----------------------------------------------------------------------------
 * Device Access
 */

static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
				   struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
	vsp1_dl_body_write(dlb, reg, data);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Operations
 */

static const unsigned int hsit_codes[] = {
	MEDIA_BUS_FMT_ARGB8888_1X32,
	MEDIA_BUS_FMT_AHSV8888_1X32,
};

static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_mbus_code_enum *code)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	if (code->index > 0)
		return -EINVAL;

	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
	    (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
		code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
	else
		code->code = MEDIA_BUS_FMT_AHSV8888_1X32;

	return 0;
}

static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
				struct v4l2_subdev_state *sd_state,
				struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_entity *entity = to_vsp1_entity(subdev);
	struct vsp1_hsit *hsit = to_hsit(subdev);
	u32 code;

	if (fse->index)
		return -EINVAL;

	if ((fse->pad == HSIT_PAD_SINK && !hsit->inverse) |
	    (fse->pad == HSIT_PAD_SOURCE && hsit->inverse))
		code = MEDIA_BUS_FMT_ARGB8888_1X32;
	else
		code = MEDIA_BUS_FMT_AHSV8888_1X32;

	if (fse->code != code)
		return -EINVAL;

	if (fse->pad == 0) {
		fse->min_width = entity->min_width;
		fse->max_width = entity->max_width;
		fse->min_height = entity->min_height;
		fse->max_height = entity->max_height;
	} else {
		struct v4l2_subdev_state *state;
		struct v4l2_mbus_framefmt *format;

		state = vsp1_entity_get_state(entity, sd_state, fse->which);
		if (!state)
			return -EINVAL;

		/*
		 * The size on the source pad is fixed and always identical to
		 * the sink pad.
		 */
		format = v4l2_subdev_state_get_format(state, HSIT_PAD_SINK);

		guard(mutex)(&entity->lock);

		fse->min_width = format->width;
		fse->max_width = format->width;
		fse->min_height = format->height;
		fse->max_height = format->height;
	}

	return 0;
}

static int hsit_set_format(struct v4l2_subdev *subdev,
			   struct v4l2_subdev_state *sd_state,
			   struct v4l2_subdev_format *fmt)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);
	struct v4l2_subdev_state *state;
	struct v4l2_mbus_framefmt *format;
	int ret = 0;

	mutex_lock(&hsit->entity.lock);

	state = vsp1_entity_get_state(&hsit->entity, sd_state, fmt->which);
	if (!state) {
		ret = -EINVAL;
		goto done;
	}

	format = v4l2_subdev_state_get_format(state, fmt->pad);

	if (fmt->pad == HSIT_PAD_SOURCE) {
		/*
		 * The HST and HSI output format code and resolution can't be
		 * modified.
		 */
		fmt->format = *format;
		goto done;
	}

	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
		     : MEDIA_BUS_FMT_ARGB8888_1X32;
	format->width = clamp_t(unsigned int, fmt->format.width,
				HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	format->field = V4L2_FIELD_NONE;

	format->colorspace = fmt->format.colorspace;
	format->xfer_func = fmt->format.xfer_func;
	format->ycbcr_enc = fmt->format.ycbcr_enc;
	format->quantization = fmt->format.quantization;

	vsp1_entity_adjust_color_space(format);

	fmt->format = *format;

	/* Propagate the format to the source pad. */
	format = v4l2_subdev_state_get_format(state, HSIT_PAD_SOURCE);
	*format = fmt->format;
	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
		     : MEDIA_BUS_FMT_AHSV8888_1X32;

	vsp1_entity_adjust_color_space(format);

done:
	mutex_unlock(&hsit->entity.lock);
	return ret;
}

static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
	.enum_mbus_code = hsit_enum_mbus_code,
	.enum_frame_size = hsit_enum_frame_size,
	.get_fmt = vsp1_subdev_get_pad_format,
	.set_fmt = hsit_set_format,
};

static const struct v4l2_subdev_ops hsit_ops = {
	.pad    = &hsit_pad_ops,
};

/* -----------------------------------------------------------------------------
 * VSP1 Entity Operations
 */

static void hsit_configure_stream(struct vsp1_entity *entity,
				  struct v4l2_subdev_state *state,
				  struct vsp1_pipeline *pipe,
				  struct vsp1_dl_list *dl,
				  struct vsp1_dl_body *dlb)
{
	struct vsp1_hsit *hsit = to_hsit(&entity->subdev);

	if (hsit->inverse)
		vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
	else
		vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
}

static const struct vsp1_entity_operations hsit_entity_ops = {
	.configure_stream = hsit_configure_stream,
};

/* -----------------------------------------------------------------------------
 * Initialization and Cleanup
 */

struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
{
	struct vsp1_hsit *hsit;
	int ret;

	hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
	if (hsit == NULL)
		return ERR_PTR(-ENOMEM);

	hsit->inverse = inverse;

	hsit->entity.ops = &hsit_entity_ops;

	if (inverse)
		hsit->entity.type = VSP1_ENTITY_HSI;
	else
		hsit->entity.type = VSP1_ENTITY_HST;

	hsit->entity.codes = hsit_codes;
	hsit->entity.num_codes = ARRAY_SIZE(hsit_codes);
	hsit->entity.min_width = HSIT_MIN_SIZE;
	hsit->entity.min_height = HSIT_MIN_SIZE;
	hsit->entity.max_width = HSIT_MAX_SIZE;
	hsit->entity.max_height = HSIT_MAX_SIZE;

	ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
			       2, &hsit_ops,
			       MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
	if (ret < 0)
		return ERR_PTR(ret);

	return hsit;
}