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// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_lut.c -- R-Car VSP1 Look-Up Table
*
* 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_lut.h"
#define LUT_MIN_SIZE 4U
#define LUT_MAX_SIZE 8190U
#define LUT_SIZE 256
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline void vsp1_lut_write(struct vsp1_lut *lut,
struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, reg, data);
}
/* -----------------------------------------------------------------------------
* Controls
*/
#define V4L2_CID_VSP1_LUT_TABLE (V4L2_CID_USER_BASE | 0x1001)
static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl)
{
struct vsp1_dl_body *dlb;
unsigned int i;
dlb = vsp1_dl_body_get(lut->pool);
if (!dlb)
return -ENOMEM;
for (i = 0; i < LUT_SIZE; ++i)
vsp1_dl_body_write(dlb, VI6_LUT_TABLE + 4 * i,
ctrl->p_new.p_u32[i]);
spin_lock_irq(&lut->lock);
swap(lut->lut, dlb);
spin_unlock_irq(&lut->lock);
vsp1_dl_body_put(dlb);
return 0;
}
static int lut_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vsp1_lut *lut =
container_of(ctrl->handler, struct vsp1_lut, ctrls);
switch (ctrl->id) {
case V4L2_CID_VSP1_LUT_TABLE:
lut_set_table(lut, ctrl);
break;
}
return 0;
}
static const struct v4l2_ctrl_ops lut_ctrl_ops = {
.s_ctrl = lut_s_ctrl,
};
static const struct v4l2_ctrl_config lut_table_control = {
.ops = &lut_ctrl_ops,
.id = V4L2_CID_VSP1_LUT_TABLE,
.name = "Look-Up Table",
.type = V4L2_CTRL_TYPE_U32,
.min = 0x00000000,
.max = 0x00ffffff,
.step = 1,
.def = 0,
.dims = { LUT_SIZE },
};
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Pad Operations
*/
static const unsigned int lut_codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AHSV8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
static int lut_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lut_codes,
ARRAY_SIZE(lut_codes));
}
static int lut_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
return vsp1_subdev_enum_frame_size(subdev, cfg, fse, LUT_MIN_SIZE,
LUT_MIN_SIZE, LUT_MAX_SIZE,
LUT_MAX_SIZE);
}
static int lut_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lut_codes,
ARRAY_SIZE(lut_codes),
LUT_MIN_SIZE, LUT_MIN_SIZE,
LUT_MAX_SIZE, LUT_MAX_SIZE);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static const struct v4l2_subdev_pad_ops lut_pad_ops = {
.init_cfg = vsp1_entity_init_cfg,
.enum_mbus_code = lut_enum_mbus_code,
.enum_frame_size = lut_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = lut_set_format,
};
static const struct v4l2_subdev_ops lut_ops = {
.pad = &lut_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void lut_configure_stream(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_body *dlb)
{
struct vsp1_lut *lut = to_lut(&entity->subdev);
vsp1_lut_write(lut, dlb, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);
}
static void lut_configure_frame(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_list *dl,
struct vsp1_dl_body *dlb)
{
struct vsp1_lut *lut = to_lut(&entity->subdev);
struct vsp1_dl_body *lut_dlb;
unsigned long flags;
spin_lock_irqsave(&lut->lock, flags);
lut_dlb = lut->lut;
lut->lut = NULL;
spin_unlock_irqrestore(&lut->lock, flags);
if (lut_dlb) {
vsp1_dl_list_add_body(dl, lut_dlb);
/* Release our local reference. */
vsp1_dl_body_put(lut_dlb);
}
}
static void lut_destroy(struct vsp1_entity *entity)
{
struct vsp1_lut *lut = to_lut(&entity->subdev);
vsp1_dl_body_pool_destroy(lut->pool);
}
static const struct vsp1_entity_operations lut_entity_ops = {
.configure_stream = lut_configure_stream,
.configure_frame = lut_configure_frame,
.destroy = lut_destroy,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)
{
struct vsp1_lut *lut;
int ret;
lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
if (lut == NULL)
return ERR_PTR(-ENOMEM);
spin_lock_init(&lut->lock);
lut->entity.ops = &lut_entity_ops;
lut->entity.type = VSP1_ENTITY_LUT;
ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops,
MEDIA_ENT_F_PROC_VIDEO_LUT);
if (ret < 0)
return ERR_PTR(ret);
/*
* Pre-allocate a body pool, with 3 bodies allowing a userspace update
* before the hardware has committed a previous set of tables, handling
* both the queued and pending dl entries.
*/
lut->pool = vsp1_dl_body_pool_create(vsp1, 3, LUT_SIZE, 0);
if (!lut->pool)
return ERR_PTR(-ENOMEM);
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&lut->ctrls, 1);
v4l2_ctrl_new_custom(&lut->ctrls, &lut_table_control, NULL);
lut->entity.subdev.ctrl_handler = &lut->ctrls;
if (lut->ctrls.error) {
dev_err(vsp1->dev, "lut: failed to initialize controls\n");
ret = lut->ctrls.error;
vsp1_entity_destroy(&lut->entity);
return ERR_PTR(ret);
}
v4l2_ctrl_handler_setup(&lut->ctrls);
return lut;
}
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