diff options
Diffstat (limited to 'drivers/media/platform/vsp1/vsp1_rpf.c')
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_rpf.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_rpf.c b/drivers/media/platform/vsp1/vsp1_rpf.c new file mode 100644 index 00000000000..c3d98642a4a --- /dev/null +++ b/drivers/media/platform/vsp1/vsp1_rpf.c @@ -0,0 +1,226 @@ +/* + * vsp1_rpf.c -- R-Car VSP1 Read 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 RPF_MAX_WIDTH 8190 +#define RPF_MAX_HEIGHT 8190 + +/* ----------------------------------------------------------------------------- + * Device Access + */ + +static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg) +{ + return vsp1_read(rpf->entity.vsp1, + reg + rpf->entity.index * VI6_RPF_OFFSET); +} + +static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data) +{ + vsp1_write(rpf->entity.vsp1, + reg + rpf->entity.index * VI6_RPF_OFFSET, data); +} + +/* ----------------------------------------------------------------------------- + * V4L2 Subdevice Core Operations + */ + +static int rpf_s_stream(struct v4l2_subdev *subdev, int enable) +{ + struct vsp1_rwpf *rpf = to_rwpf(subdev); + const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo; + const struct v4l2_pix_format_mplane *format = &rpf->video.format; + const struct v4l2_rect *crop = &rpf->crop; + u32 pstride; + u32 infmt; + + if (!enable) + return 0; + + /* Source size, stride and crop offsets. + * + * The crop offsets correspond to the location of the crop rectangle top + * left corner in the plane buffer. Only two offsets are needed, as + * planes 2 and 3 always have identical strides. + */ + vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE, + (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) | + (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT)); + vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE, + (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) | + (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT)); + + rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline + + crop->left * fmtinfo->bpp[0] / 8; + pstride = format->plane_fmt[0].bytesperline + << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT; + if (format->num_planes > 1) { + rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline + + crop->left * fmtinfo->bpp[1] / 8; + pstride |= format->plane_fmt[1].bytesperline + << VI6_RPF_SRCM_PSTRIDE_C_SHIFT; + } + + vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride); + + /* Format */ + infmt = VI6_RPF_INFMT_CIPM + | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT); + + if (fmtinfo->swap_yc) + infmt |= VI6_RPF_INFMT_SPYCS; + if (fmtinfo->swap_uv) + infmt |= VI6_RPF_INFMT_SPUVS; + + if (rpf->entity.formats[RWPF_PAD_SINK].code != + rpf->entity.formats[RWPF_PAD_SOURCE].code) + infmt |= VI6_RPF_INFMT_CSC; + + vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt); + vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap); + + /* Output location */ + vsp1_rpf_write(rpf, VI6_RPF_LOC, + (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) | + (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT)); + + /* Disable alpha, mask and color key. Set the alpha channel to a fixed + * value of 255. + */ + vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_ASEL_FIXED); + vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET, + 255 << VI6_RPF_VRTCOL_SET_LAYA_SHIFT); + vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0); + vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0); + + return 0; +} + +/* ----------------------------------------------------------------------------- + * V4L2 Subdevice Operations + */ + +static struct v4l2_subdev_video_ops rpf_video_ops = { + .s_stream = rpf_s_stream, +}; + +static struct v4l2_subdev_pad_ops rpf_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 rpf_ops = { + .video = &rpf_video_ops, + .pad = &rpf_pad_ops, +}; + +/* ----------------------------------------------------------------------------- + * Video Device Operations + */ + +static void rpf_vdev_queue(struct vsp1_video *video, + struct vsp1_video_buffer *buf) +{ + struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video); + + vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y, + buf->addr[0] + rpf->offsets[0]); + if (buf->buf.num_planes > 1) + vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0, + buf->addr[1] + rpf->offsets[1]); + if (buf->buf.num_planes > 2) + vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1, + buf->addr[2] + rpf->offsets[1]); +} + +static const struct vsp1_video_operations rpf_vdev_ops = { + .queue = rpf_vdev_queue, +}; + +/* ----------------------------------------------------------------------------- + * Initialization and Cleanup + */ + +struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index) +{ + struct v4l2_subdev *subdev; + struct vsp1_video *video; + struct vsp1_rwpf *rpf; + int ret; + + rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL); + if (rpf == NULL) + return ERR_PTR(-ENOMEM); + + rpf->max_width = RPF_MAX_WIDTH; + rpf->max_height = RPF_MAX_HEIGHT; + + rpf->entity.type = VSP1_ENTITY_RPF; + rpf->entity.index = index; + + ret = vsp1_entity_init(vsp1, &rpf->entity, 2); + if (ret < 0) + return ERR_PTR(ret); + + /* Initialize the V4L2 subdev. */ + subdev = &rpf->entity.subdev; + v4l2_subdev_init(subdev, &rpf_ops); + + subdev->entity.ops = &vsp1_media_ops; + subdev->internal_ops = &vsp1_subdev_internal_ops; + snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u", + dev_name(vsp1->dev), index); + v4l2_set_subdevdata(subdev, rpf); + subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + vsp1_entity_init_formats(subdev, NULL); + + /* Initialize the video device. */ + video = &rpf->video; + + video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + video->vsp1 = vsp1; + video->ops = &rpf_vdev_ops; + + ret = vsp1_video_init(video, &rpf->entity); + if (ret < 0) + goto error_video; + + /* Connect the video device to the RPF. */ + ret = media_entity_create_link(&rpf->video.video.entity, 0, + &rpf->entity.subdev.entity, + RWPF_PAD_SINK, + MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); + if (ret < 0) + goto error_link; + + return rpf; + +error_link: + vsp1_video_cleanup(video); +error_video: + media_entity_cleanup(&rpf->entity.subdev.entity); + return ERR_PTR(ret); +} |