277 lines
7.5 KiB
C
277 lines
7.5 KiB
C
/*
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* vsp1_rpf.c -- R-Car VSP1 Read Pixel Formatter
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/device.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_rwpf.h"
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#include "vsp1_video.h"
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#define RPF_MAX_WIDTH 8190
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#define RPF_MAX_HEIGHT 8190
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
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{
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return vsp1_read(rpf->entity.vsp1,
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reg + rpf->entity.index * VI6_RPF_OFFSET);
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}
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static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
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{
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vsp1_write(rpf->entity.vsp1,
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reg + rpf->entity.index * VI6_RPF_OFFSET, data);
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}
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/* -----------------------------------------------------------------------------
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* Controls
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*/
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static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct vsp1_rwpf *rpf =
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container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
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struct vsp1_pipeline *pipe;
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if (!vsp1_entity_is_streaming(&rpf->entity))
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return 0;
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switch (ctrl->id) {
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case V4L2_CID_ALPHA_COMPONENT:
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vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
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ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
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pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
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vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
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break;
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}
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return 0;
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}
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static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
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.s_ctrl = rpf_s_ctrl,
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};
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Core Operations
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*/
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static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
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{
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struct vsp1_rwpf *rpf = to_rwpf(subdev);
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const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
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const struct v4l2_pix_format_mplane *format = &rpf->video.format;
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const struct v4l2_rect *crop = &rpf->crop;
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u32 pstride;
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u32 infmt;
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int ret;
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ret = vsp1_entity_set_streaming(&rpf->entity, enable);
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if (ret < 0)
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return ret;
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if (!enable)
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return 0;
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/* Source size, stride and crop offsets.
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*
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* The crop offsets correspond to the location of the crop rectangle top
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* left corner in the plane buffer. Only two offsets are needed, as
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* planes 2 and 3 always have identical strides.
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*/
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vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
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(crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
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(crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
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vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
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(crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
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(crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
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rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
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+ crop->left * fmtinfo->bpp[0] / 8;
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pstride = format->plane_fmt[0].bytesperline
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<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
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if (format->num_planes > 1) {
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rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
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+ crop->left * fmtinfo->bpp[1] / 8;
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pstride |= format->plane_fmt[1].bytesperline
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<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
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}
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vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
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/* Format */
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infmt = VI6_RPF_INFMT_CIPM
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| (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
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if (fmtinfo->swap_yc)
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infmt |= VI6_RPF_INFMT_SPYCS;
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if (fmtinfo->swap_uv)
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infmt |= VI6_RPF_INFMT_SPUVS;
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if (rpf->entity.formats[RWPF_PAD_SINK].code !=
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rpf->entity.formats[RWPF_PAD_SOURCE].code)
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infmt |= VI6_RPF_INFMT_CSC;
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vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
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vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
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/* Output location */
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vsp1_rpf_write(rpf, VI6_RPF_LOC,
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(rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
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(rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
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/* Use the alpha channel (extended to 8 bits) when available or an
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* alpha value set through the V4L2_CID_ALPHA_COMPONENT control
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* otherwise. Disable color keying.
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*/
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vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
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(fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
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: VI6_RPF_ALPH_SEL_ASEL_FIXED));
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vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
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vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
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return 0;
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Operations
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*/
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static struct v4l2_subdev_video_ops rpf_video_ops = {
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.s_stream = rpf_s_stream,
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};
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static struct v4l2_subdev_pad_ops rpf_pad_ops = {
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.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
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.enum_frame_size = vsp1_rwpf_enum_frame_size,
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.get_fmt = vsp1_rwpf_get_format,
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.set_fmt = vsp1_rwpf_set_format,
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.get_selection = vsp1_rwpf_get_selection,
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.set_selection = vsp1_rwpf_set_selection,
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};
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static struct v4l2_subdev_ops rpf_ops = {
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.video = &rpf_video_ops,
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.pad = &rpf_pad_ops,
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};
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/* -----------------------------------------------------------------------------
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* Video Device Operations
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*/
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static void rpf_vdev_queue(struct vsp1_video *video,
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struct vsp1_video_buffer *buf)
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{
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struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
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vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
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buf->addr[0] + rpf->offsets[0]);
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if (buf->buf.num_planes > 1)
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vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
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buf->addr[1] + rpf->offsets[1]);
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if (buf->buf.num_planes > 2)
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vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
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buf->addr[2] + rpf->offsets[1]);
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}
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static const struct vsp1_video_operations rpf_vdev_ops = {
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.queue = rpf_vdev_queue,
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};
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/* -----------------------------------------------------------------------------
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* Initialization and Cleanup
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*/
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struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
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{
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struct v4l2_subdev *subdev;
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struct vsp1_video *video;
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struct vsp1_rwpf *rpf;
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int ret;
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rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
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if (rpf == NULL)
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return ERR_PTR(-ENOMEM);
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rpf->max_width = RPF_MAX_WIDTH;
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rpf->max_height = RPF_MAX_HEIGHT;
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rpf->entity.type = VSP1_ENTITY_RPF;
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rpf->entity.index = index;
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ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
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if (ret < 0)
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return ERR_PTR(ret);
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/* Initialize the V4L2 subdev. */
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subdev = &rpf->entity.subdev;
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v4l2_subdev_init(subdev, &rpf_ops);
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subdev->entity.ops = &vsp1_media_ops;
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subdev->internal_ops = &vsp1_subdev_internal_ops;
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snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
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dev_name(vsp1->dev), index);
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v4l2_set_subdevdata(subdev, rpf);
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subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
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vsp1_entity_init_formats(subdev, NULL);
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/* Initialize the control handler. */
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v4l2_ctrl_handler_init(&rpf->ctrls, 1);
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v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
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0, 255, 1, 255);
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rpf->entity.subdev.ctrl_handler = &rpf->ctrls;
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if (rpf->ctrls.error) {
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dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
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index);
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ret = rpf->ctrls.error;
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goto error;
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}
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/* Initialize the video device. */
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video = &rpf->video;
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video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
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video->vsp1 = vsp1;
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video->ops = &rpf_vdev_ops;
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ret = vsp1_video_init(video, &rpf->entity);
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if (ret < 0)
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goto error;
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rpf->entity.video = video;
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/* Connect the video device to the RPF. */
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ret = media_entity_create_link(&rpf->video.video.entity, 0,
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&rpf->entity.subdev.entity,
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RWPF_PAD_SINK,
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MEDIA_LNK_FL_ENABLED |
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MEDIA_LNK_FL_IMMUTABLE);
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if (ret < 0)
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goto error;
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return rpf;
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error:
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vsp1_entity_destroy(&rpf->entity);
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return ERR_PTR(ret);
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}
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