// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_brx.c -- R-Car VSP1 Blend ROP Unit (BRU and BRS)
*
* Copyright (C) 2013 Renesas Corporation
*
* Contact: Laurent Pinchart ([email protected])
*/
#include <linux/device.h>
#include <linux/gfp.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_brx.h"
#include "vsp1_dl.h"
#include "vsp1_pipe.h"
#include "vsp1_rwpf.h"
#include "vsp1_video.h"
#define BRX_MIN_SIZE 1U
#define BRX_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline void vsp1_brx_write(struct vsp1_brx *brx,
struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, brx->base + reg, data);
}
/* -----------------------------------------------------------------------------
* Controls
*/
static int brx_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vsp1_brx *brx =
container_of(ctrl->handler, struct vsp1_brx, ctrls);
switch (ctrl->id) {
case V4L2_CID_BG_COLOR:
brx->bgcolor = ctrl->val;
break;
}
return 0;
}
static const struct v4l2_ctrl_ops brx_ctrl_ops = {
.s_ctrl = brx_s_ctrl,
};
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
/*
* The BRx can't perform format conversion, all sink and source formats must be
* identical. We pick the format on the first sink pad (pad 0) and propagate it
* to all other pads.
*/
static int brx_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
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, sd_state, code, codes,
ARRAY_SIZE(codes));
}
static int brx_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index)
return -EINVAL;
if (fse->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
fse->code != MEDIA_BUS_FMT_AYUV8_1X32)
return -EINVAL;
fse->min_width = BRX_MIN_SIZE;
fse->max_width = BRX_MAX_SIZE;
fse->min_height = BRX_MIN_SIZE;
fse->max_height = BRX_MAX_SIZE;
return 0;
}
static void brx_try_format(struct vsp1_brx *brx,
struct v4l2_subdev_state *sd_state,
unsigned int pad, struct v4l2_mbus_framefmt *fmt)
{
struct v4l2_mbus_framefmt *format;
switch (pad) {
case BRX_PAD_SINK(0):
/* 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;
break;
default:
/* The BRx can't perform format conversion. */
format = v4l2_subdev_state_get_format(sd_state,
BRX_PAD_SINK(0));
fmt->code = format->code;
break;
}
fmt->width = clamp(fmt->width, BRX_MIN_SIZE, BRX_MAX_SIZE);
fmt->height = clamp(fmt->height, BRX_MIN_SIZE, BRX_MAX_SIZE);
fmt->field = V4L2_FIELD_NONE;
fmt->colorspace = V4L2_COLORSPACE_SRGB;
}
static int brx_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct vsp1_brx *brx = to_brx(subdev);
struct v4l2_subdev_state *state;
struct v4l2_mbus_framefmt *format;
int ret = 0;
mutex_lock(&brx->entity.lock);
state = vsp1_entity_get_state(&brx->entity, sd_state, fmt->which);
if (!state) {
ret = -EINVAL;
goto done;
}
brx_try_format(brx, state, fmt->pad, &fmt->format);
format = v4l2_subdev_state_get_format(state, fmt->pad);
*format = fmt->format;
/* Reset the compose rectangle. */
if (fmt->pad != brx->entity.source_pad) {
struct v4l2_rect *compose;
compose = v4l2_subdev_state_get_compose(state, fmt->pad);
compose->left = 0;
compose->top = 0;
compose->width = format->width;
compose->height = format->height;
}
/* Propagate the format code to all pads. */
if (fmt->pad == BRX_PAD_SINK(0)) {
unsigned int i;
for (i = 0; i <= brx->entity.source_pad; ++i) {
format = v4l2_subdev_state_get_format(state, i);
format->code = fmt->format.code;
}
}
done:
mutex_unlock(&brx->entity.lock);
return ret;
}
static int brx_get_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vsp1_brx *brx = to_brx(subdev);
struct v4l2_subdev_state *state;
if (sel->pad == brx->entity.source_pad)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = BRX_MAX_SIZE;
sel->r.height = BRX_MAX_SIZE;
return 0;
case V4L2_SEL_TGT_COMPOSE:
state = vsp1_entity_get_state(&brx->entity, sd_state,
sel->which);
if (!state)
return -EINVAL;
mutex_lock(&brx->entity.lock);
sel->r = *v4l2_subdev_state_get_compose(state, sel->pad);
mutex_unlock(&brx->entity.lock);
return 0;
default:
return -EINVAL;
}
}
static int brx_set_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vsp1_brx *brx = to_brx(subdev);
struct v4l2_subdev_state *state;
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *compose;
int ret = 0;
if (sel->pad == brx->entity.source_pad)
return -EINVAL;
if (sel->target != V4L2_SEL_TGT_COMPOSE)
return -EINVAL;
mutex_lock(&brx->entity.lock);
state = vsp1_entity_get_state(&brx->entity, sd_state, sel->which);
if (!state) {
ret = -EINVAL;
goto done;
}
/*
* The compose rectangle top left corner must be inside the output
* frame.
*/
format = v4l2_subdev_state_get_format(state, brx->entity.source_pad);
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);
/*
* Scaling isn't supported, the compose rectangle size must be identical
* to the sink format size.
*/
format = v4l2_subdev_state_get_format(state, sel->pad);
sel->r.width = format->width;
sel->r.height = format->height;
compose = v4l2_subdev_state_get_compose(state, sel->pad);
*compose = sel->r;
done:
mutex_unlock(&brx->entity.lock);
return ret;
}
static const struct v4l2_subdev_pad_ops brx_pad_ops = {
.enum_mbus_code = brx_enum_mbus_code,
.enum_frame_size = brx_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = brx_set_format,
.get_selection = brx_get_selection,
.set_selection = brx_set_selection,
};
static const struct v4l2_subdev_ops brx_ops = {
.pad = &brx_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void brx_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_brx *brx = to_brx(&entity->subdev);
struct v4l2_mbus_framefmt *format;
unsigned int flags;
unsigned int i;
format = v4l2_subdev_state_get_format(state, brx->entity.source_pad);
/*
* The hardware is extremely flexible but we have no userspace API to
* expose all the parameters, nor is it clear whether we would have use
* cases for all the supported modes. Let's just hardcode the parameters
* to sane default values for now.
*/
/*
* Disable dithering and enable color data normalization unless the
* format at the pipeline output is premultiplied.
*/
flags = pipe->output ? pipe->output->format.flags : 0;
vsp1_brx_write(brx, dlb, VI6_BRU_INCTRL,
flags & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA ?
0 : VI6_BRU_INCTRL_NRM);
/*
* Set the background position to cover the whole output image and
* configure its color.
*/
vsp1_brx_write(brx, dlb, VI6_BRU_VIRRPF_SIZE,
(format->width << VI6_BRU_VIRRPF_SIZE_HSIZE_SHIFT) |
(format->height << VI6_BRU_VIRRPF_SIZE_VSIZE_SHIFT));
vsp1_brx_write(brx, dlb, VI6_BRU_VIRRPF_LOC, 0);
vsp1_brx_write(brx, dlb, VI6_BRU_VIRRPF_COL, brx->bgcolor |
(0xff << VI6_BRU_VIRRPF_COL_A_SHIFT));
/*
* Route BRU input 1 as SRC input to the ROP unit and configure the ROP
* unit with a NOP operation to make BRU input 1 available as the
* Blend/ROP unit B SRC input. Only needed for BRU, the BRS has no ROP
* unit.
*/
if (entity->type == VSP1_ENTITY_BRU)
vsp1_brx_write(brx, dlb, VI6_BRU_ROP,
VI6_BRU_ROP_DSTSEL_BRUIN(1) |
VI6_BRU_ROP_CROP(VI6_ROP_NOP) |
VI6_BRU_ROP_AROP(VI6_ROP_NOP));
for (i = 0; i < brx->entity.source_pad; ++i) {
bool premultiplied = false;
u32 ctrl = 0;
/*
* Configure all Blend/ROP units corresponding to an enabled BRx
* input for alpha blending. Blend/ROP units corresponding to
* disabled BRx inputs are used in ROP NOP mode to ignore the
* SRC input.
*/
if (brx->inputs[i].rpf) {
ctrl |= VI6_BRU_CTRL_RBC;
premultiplied = brx->inputs[i].rpf->format.flags
& V4L2_PIX_FMT_FLAG_PREMUL_ALPHA;
} else {
ctrl |= VI6_BRU_CTRL_CROP(VI6_ROP_NOP)
| VI6_BRU_CTRL_AROP(VI6_ROP_NOP);
}
/*
* Select the virtual RPF as the Blend/ROP unit A DST input to
* serve as a background color.
*/
if (i == 0)
ctrl |= VI6_BRU_CTRL_DSTSEL_VRPF;
/*
* Route inputs 0 to 3 as SRC inputs to Blend/ROP units A to D
* in that order. In the BRU the Blend/ROP unit B SRC is
* hardwired to the ROP unit output, the corresponding register
* bits must be set to 0. The BRS has no ROP unit and doesn't
* need any special processing.
*/
if (!(entity->type == VSP1_ENTITY_BRU && i == 1))
ctrl |= VI6_BRU_CTRL_SRCSEL_BRUIN(i);
vsp1_brx_write(brx, dlb, VI6_BRU_CTRL(i), ctrl);
/*
* Hardcode the blending formula to
*
* DSTc = DSTc * (1 - SRCa) + SRCc * SRCa
* DSTa = DSTa * (1 - SRCa) + SRCa
*
* when the SRC input isn't premultiplied, and to
*
* DSTc = DSTc * (1 - SRCa) + SRCc
* DSTa = DSTa * (1 - SRCa) + SRCa
*
* otherwise.
*/
vsp1_brx_write(brx, dlb, VI6_BRU_BLD(i),
VI6_BRU_BLD_CCMDX_255_SRC_A |
(premultiplied ? VI6_BRU_BLD_CCMDY_COEFY :
VI6_BRU_BLD_CCMDY_SRC_A) |
VI6_BRU_BLD_ACMDX_255_SRC_A |
VI6_BRU_BLD_ACMDY_COEFY |
(0xff << VI6_BRU_BLD_COEFY_SHIFT));
}
}
static const struct vsp1_entity_operations brx_entity_ops = {
.configure_stream = brx_configure_stream,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_brx *vsp1_brx_create(struct vsp1_device *vsp1,
enum vsp1_entity_type type)
{
struct vsp1_brx *brx;
unsigned int num_pads;
const char *name;
int ret;
brx = devm_kzalloc(vsp1->dev, sizeof(*brx), GFP_KERNEL);
if (brx == NULL)
return ERR_PTR(-ENOMEM);
brx->base = type == VSP1_ENTITY_BRU ? VI6_BRU_BASE : VI6_BRS_BASE;
brx->entity.ops = &brx_entity_ops;
brx->entity.type = type;
if (type == VSP1_ENTITY_BRU) {
num_pads = vsp1->info->num_bru_inputs + 1;
name = "bru";
} else {
num_pads = 3;
name = "brs";
}
ret = vsp1_entity_init(vsp1, &brx->entity, name, num_pads, &brx_ops,
MEDIA_ENT_F_PROC_VIDEO_COMPOSER);
if (ret < 0)
return ERR_PTR(ret);
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&brx->ctrls, 1);
v4l2_ctrl_new_std(&brx->ctrls, &brx_ctrl_ops, V4L2_CID_BG_COLOR,
0, 0xffffff, 1, 0);
brx->bgcolor = 0;
brx->entity.subdev.ctrl_handler = &brx->ctrls;
if (brx->ctrls.error) {
dev_err(vsp1->dev, "%s: failed to initialize controls\n", name);
ret = brx->ctrls.error;
vsp1_entity_destroy(&brx->entity);
return ERR_PTR(ret);
}
return brx;
}
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