- 根目录:
- drivers
- media
- platform
- vsp1
- vsp1_wpf.c
/*
* vsp1_wpf.c -- R-Car VSP1 Write Pixel Formatter
*
* Copyright (C) 2013-2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/device.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_rwpf.h"
#include "vsp1_video.h"
#define WPF_MAX_WIDTH 2048
#define WPF_MAX_HEIGHT 2048
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
{
return vsp1_read(wpf->entity.vsp1,
reg + wpf->entity.index * VI6_WPF_OFFSET);
}
static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
{
vsp1_write(wpf->entity.vsp1,
reg + wpf->entity.index * VI6_WPF_OFFSET, data);
}
/* -----------------------------------------------------------------------------
* Controls
*/
static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vsp1_rwpf *wpf =
container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
u32 value;
if (!vsp1_entity_is_streaming(&wpf->entity))
return 0;
switch (ctrl->id) {
case V4L2_CID_ALPHA_COMPONENT:
value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
value &= ~VI6_WPF_OUTFMT_PDV_MASK;
value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
break;
}
return 0;
}
static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
.s_ctrl = wpf_s_ctrl,
};
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Core Operations
*/
static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
struct vsp1_rwpf *wpf = to_rwpf(subdev);
struct vsp1_device *vsp1 = wpf->entity.vsp1;
const struct v4l2_rect *crop = &wpf->crop;
unsigned int i;
u32 srcrpf = 0;
u32 outfmt = 0;
int ret;
ret = vsp1_entity_set_streaming(&wpf->entity, enable);
if (ret < 0)
return ret;
if (!enable) {
vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
return 0;
}
/* Sources. If the pipeline has a single input configure it as the
* master layer. Otherwise configure all inputs as sub-layers and
* select the virtual RPF as the master layer.
*/
for (i = 0; i < pipe->num_inputs; ++i) {
struct vsp1_rwpf *input = pipe->inputs[i];
srcrpf |= pipe->num_inputs == 1
? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
: VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
}
if (pipe->num_inputs > 1)
srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
/* Destination stride. */
if (!pipe->lif) {
struct v4l2_pix_format_mplane *format = &wpf->video.format;
vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
format->plane_fmt[0].bytesperline);
if (format->num_planes > 1)
vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
format->plane_fmt[1].bytesperline);
}
vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
(crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
(crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
(crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
(crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
/* Format */
if (!pipe->lif) {
const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
if (fmtinfo->alpha)
outfmt |= VI6_WPF_OUTFMT_PXA;
if (fmtinfo->swap_yc)
outfmt |= VI6_WPF_OUTFMT_SPYCS;
if (fmtinfo->swap_uv)
outfmt |= VI6_WPF_OUTFMT_SPUVS;
vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
}
if (wpf->entity.formats[RWPF_PAD_SINK].code !=
wpf->entity.formats[RWPF_PAD_SOURCE].code)
outfmt |= VI6_WPF_OUTFMT_CSC;
/* Take the control handler lock to ensure that the PDV value won't be
* changed behind our back by a set control operation.
*/
mutex_lock(wpf->ctrls.lock);
outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
mutex_unlock(wpf->ctrls.lock);
vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
VI6_DPR_WPF_FPORCH_FP_WPFN);
vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
/* Enable interrupts */
vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
VI6_WFP_IRQ_ENB_FREE);
return 0;
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static struct v4l2_subdev_video_ops wpf_video_ops = {
.s_stream = wpf_s_stream,
};
static struct v4l2_subdev_pad_ops wpf_pad_ops = {
.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
.enum_frame_size = vsp1_rwpf_enum_frame_size,
.get_fmt = vsp1_rwpf_get_format,
.set_fmt = vsp1_rwpf_set_format,
.get_selection = vsp1_rwpf_get_selection,
.set_selection = vsp1_rwpf_set_selection,
};
static struct v4l2_subdev_ops wpf_ops = {
.video = &wpf_video_ops,
.pad = &wpf_pad_ops,
};
/* -----------------------------------------------------------------------------
* Video Device Operations
*/
static void wpf_vdev_queue(struct vsp1_video *video,
struct vsp1_video_buffer *buf)
{
struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
if (buf->buf.num_planes > 1)
vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
if (buf->buf.num_planes > 2)
vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
}
static const struct vsp1_video_operations wpf_vdev_ops = {
.queue = wpf_vdev_queue,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
{
struct v4l2_subdev *subdev;
struct vsp1_video *video;
struct vsp1_rwpf *wpf;
unsigned int flags;
int ret;
wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
if (wpf == NULL)
return ERR_PTR(-ENOMEM);
wpf->max_width = WPF_MAX_WIDTH;
wpf->max_height = WPF_MAX_HEIGHT;
wpf->entity.type = VSP1_ENTITY_WPF;
wpf->entity.index = index;
ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
if (ret < 0)
return ERR_PTR(ret);
/* Initialize the V4L2 subdev. */
subdev = &wpf->entity.subdev;
v4l2_subdev_init(subdev, &wpf_ops);
subdev->entity.ops = &vsp1_media_ops;
subdev->internal_ops = &vsp1_subdev_internal_ops;
snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
dev_name(vsp1->dev), index);
v4l2_set_subdevdata(subdev, wpf);
subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
vsp1_entity_init_formats(subdev, NULL);
/* Initialize the control handler. */
v4l2_ctrl_handler_init(&wpf->ctrls, 1);
v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
0, 255, 1, 255);
wpf->entity.subdev.ctrl_handler = &wpf->ctrls;
if (wpf->ctrls.error) {
dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
index);
ret = wpf->ctrls.error;
goto error;
}
/* Initialize the video device. */
video = &wpf->video;
video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
video->vsp1 = vsp1;
video->ops = &wpf_vdev_ops;
ret = vsp1_video_init(video, &wpf->entity);
if (ret < 0)
goto error;
wpf->entity.video = video;
/* Connect the video device to the WPF. All connections are immutable
* except for the WPF0 source link if a LIF is present.
*/
flags = MEDIA_LNK_FL_ENABLED;
if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
flags |= MEDIA_LNK_FL_IMMUTABLE;
ret = media_entity_create_link(&wpf->entity.subdev.entity,
RWPF_PAD_SOURCE,
&wpf->video.video.entity, 0, flags);
if (ret < 0)
goto error;
wpf->entity.sink = &wpf->video.video.entity;
return wpf;
error:
vsp1_entity_destroy(&wpf->entity);
return ERR_PTR(ret);
}