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// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_uif.c -- R-Car VSP1 User Logic Interface
*
* Copyright (C) 2017-2018 Laurent Pinchart
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <linux/device.h>
#include <linux/gfp.h>
#include <linux/sys_soc.h>
#include <media/media-entity.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_uif.h"
#define UIF_MIN_SIZE 4U
#define UIF_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline u32 vsp1_uif_read(struct vsp1_uif *uif, u32 reg)
{
return vsp1_read(uif->entity.vsp1,
uif->entity.index * VI6_UIF_OFFSET + reg);
}
static inline void vsp1_uif_write(struct vsp1_uif *uif,
struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, reg + uif->entity.index * VI6_UIF_OFFSET, data);
}
u32 vsp1_uif_get_crc(struct vsp1_uif *uif)
{
return vsp1_uif_read(uif, VI6_UIF_DISCOM_DOCMCCRCR);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Pad Operations
*/
static const unsigned int uif_codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AHSV8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
static int uif_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, uif_codes,
ARRAY_SIZE(uif_codes));
}
static int uif_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, UIF_MIN_SIZE,
UIF_MIN_SIZE, UIF_MAX_SIZE,
UIF_MAX_SIZE);
}
static int uif_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, uif_codes,
ARRAY_SIZE(uif_codes),
UIF_MIN_SIZE, UIF_MIN_SIZE,
UIF_MAX_SIZE, UIF_MAX_SIZE);
}
static int uif_get_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct vsp1_uif *uif = to_uif(subdev);
struct v4l2_subdev_pad_config *config;
struct v4l2_mbus_framefmt *format;
int ret = 0;
if (sel->pad != UIF_PAD_SINK)
return -EINVAL;
mutex_lock(&uif->entity.lock);
config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
if (!config) {
ret = -EINVAL;
goto done;
}
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP_DEFAULT:
format = vsp1_entity_get_pad_format(&uif->entity, config,
UIF_PAD_SINK);
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = format->width;
sel->r.height = format->height;
break;
case V4L2_SEL_TGT_CROP:
sel->r = *vsp1_entity_get_pad_selection(&uif->entity, config,
sel->pad, sel->target);
break;
default:
ret = -EINVAL;
break;
}
done:
mutex_unlock(&uif->entity.lock);
return ret;
}
static int uif_set_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct vsp1_uif *uif = to_uif(subdev);
struct v4l2_subdev_pad_config *config;
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *selection;
int ret = 0;
if (sel->pad != UIF_PAD_SINK ||
sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
mutex_lock(&uif->entity.lock);
config = vsp1_entity_get_pad_config(&uif->entity, cfg, sel->which);
if (!config) {
ret = -EINVAL;
goto done;
}
/* The crop rectangle must be inside the input frame. */
format = vsp1_entity_get_pad_format(&uif->entity, config, UIF_PAD_SINK);
sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE,
format->width - sel->r.left);
sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE,
format->height - sel->r.top);
/* Store the crop rectangle. */
selection = vsp1_entity_get_pad_selection(&uif->entity, config,
sel->pad, V4L2_SEL_TGT_CROP);
*selection = sel->r;
done:
mutex_unlock(&uif->entity.lock);
return ret;
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static const struct v4l2_subdev_pad_ops uif_pad_ops = {
.init_cfg = vsp1_entity_init_cfg,
.enum_mbus_code = uif_enum_mbus_code,
.enum_frame_size = uif_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = uif_set_format,
.get_selection = uif_get_selection,
.set_selection = uif_set_selection,
};
static const struct v4l2_subdev_ops uif_ops = {
.pad = &uif_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void uif_configure_stream(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_body *dlb)
{
struct vsp1_uif *uif = to_uif(&entity->subdev);
const struct v4l2_rect *crop;
unsigned int left;
unsigned int width;
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR,
VI6_UIF_DISCOM_DOCMPMR_SEL(9));
crop = vsp1_entity_get_pad_selection(entity, entity->config,
UIF_PAD_SINK, V4L2_SEL_TGT_CROP);
left = crop->left;
width = crop->width;
/* On M3-W the horizontal coordinates are twice the register value. */
if (uif->m3w_quirk) {
left /= 2;
width /= 2;
}
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, left);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, crop->height);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR,
VI6_UIF_DISCOM_DOCMCR_CMPR);
}
static const struct vsp1_entity_operations uif_entity_ops = {
.configure_stream = uif_configure_stream,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
static const struct soc_device_attribute vsp1_r8a7796[] = {
{ .soc_id = "r8a7796" },
{ /* sentinel */ }
};
struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index)
{
struct vsp1_uif *uif;
char name[6];
int ret;
uif = devm_kzalloc(vsp1->dev, sizeof(*uif), GFP_KERNEL);
if (!uif)
return ERR_PTR(-ENOMEM);
if (soc_device_match(vsp1_r8a7796))
uif->m3w_quirk = true;
uif->entity.ops = &uif_entity_ops;
uif->entity.type = VSP1_ENTITY_UIF;
uif->entity.index = index;
/* The datasheet names the two UIF instances UIF4 and UIF5. */
sprintf(name, "uif.%u", index + 4);
ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops,
MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
if (ret < 0)
return ERR_PTR(ret);
return uif;
}
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