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// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_lif.c -- R-Car VSP1 LCD Controller Interface
*
* Copyright (C) 2013-2014 Renesas Electronics 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_lif.h"
#define LIF_MIN_SIZE 2U
#define LIF_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline void vsp1_lif_write(struct vsp1_lif *lif,
struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, reg + lif->entity.index * VI6_LIF_OFFSET,
data);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static const unsigned int lif_codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
static int lif_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, lif_codes,
ARRAY_SIZE(lif_codes));
}
static int lif_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, LIF_MIN_SIZE,
LIF_MIN_SIZE, LIF_MAX_SIZE,
LIF_MAX_SIZE);
}
static int lif_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, lif_codes,
ARRAY_SIZE(lif_codes),
LIF_MIN_SIZE, LIF_MIN_SIZE,
LIF_MAX_SIZE, LIF_MAX_SIZE);
}
static const struct v4l2_subdev_pad_ops lif_pad_ops = {
.init_cfg = vsp1_entity_init_cfg,
.enum_mbus_code = lif_enum_mbus_code,
.enum_frame_size = lif_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = lif_set_format,
};
static const struct v4l2_subdev_ops lif_ops = {
.pad = &lif_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void lif_configure_stream(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_body *dlb)
{
const struct v4l2_mbus_framefmt *format;
struct vsp1_lif *lif = to_lif(&entity->subdev);
unsigned int hbth = 1300;
unsigned int obth = 400;
unsigned int lbth = 200;
format = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config,
LIF_PAD_SOURCE);
obth = min(obth, (format->width + 1) / 2 * format->height - 4);
vsp1_lif_write(lif, dlb, VI6_LIF_CSBTH,
(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) |
(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));
vsp1_lif_write(lif, dlb, VI6_LIF_CTRL,
(obth << VI6_LIF_CTRL_OBTH_SHIFT) |
(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |
VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);
/*
* On R-Car V3M the LIF0 buffer attribute register has to be set to a
* non-default value to guarantee proper operation (otherwise artifacts
* may appear on the output). The value required by the manual is not
* explained but is likely a buffer size or threshold.
*/
if ((entity->vsp1->version & VI6_IP_VERSION_MASK) ==
(VI6_IP_VERSION_MODEL_VSPD_V3 | VI6_IP_VERSION_SOC_V3M))
vsp1_lif_write(lif, dlb, VI6_LIF_LBA,
VI6_LIF_LBA_LBA0 |
(1536 << VI6_LIF_LBA_LBA1_SHIFT));
}
static const struct vsp1_entity_operations lif_entity_ops = {
.configure_stream = lif_configure_stream,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1, unsigned int index)
{
struct vsp1_lif *lif;
int ret;
lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);
if (lif == NULL)
return ERR_PTR(-ENOMEM);
lif->entity.ops = &lif_entity_ops;
lif->entity.type = VSP1_ENTITY_LIF;
lif->entity.index = index;
/*
* The LIF is never exposed to userspace, but media entity registration
* requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
* avoid triggering a WARN_ON(), the value won't be seen anywhere.
*/
ret = vsp1_entity_init(vsp1, &lif->entity, "lif", 2, &lif_ops,
MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
if (ret < 0)
return ERR_PTR(ret);
return lif;
}
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