drivers/media/platform/vsp1/vsp1_rpf.c

   1 /*
   2  * vsp1_rpf.c  --  R-Car VSP1 Read Pixel Formatter
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/device.h>
  15
  16 #include <media/v4l2-subdev.h>
  17
  18 #include "vsp1.h"
  19 #include "vsp1_rwpf.h"
  20 #include "vsp1_video.h"
  21
  22 #define RPF_MAX_WIDTH                           8190
  23 #define RPF_MAX_HEIGHT                          8190
  24
  25 /* -----------------------------------------------------------------------------
  26  * Device Access
  27  */
  28
  29 static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
  30 {
  31         return vsp1_read(rpf->entity.vsp1,
  32                          reg + rpf->entity.index * VI6_RPF_OFFSET);
  33 }
  34
  35 static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
  36 {
  37         vsp1_write(rpf->entity.vsp1,
  38                    reg + rpf->entity.index * VI6_RPF_OFFSET, data);
  39 }
  40
  41 /* -----------------------------------------------------------------------------
  42  * V4L2 Subdevice Core Operations
  43  */
  44
  45 static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
  46 {
  47         struct vsp1_rwpf *rpf = to_rwpf(subdev);
  48         const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
  49         const struct v4l2_pix_format_mplane *format = &rpf->video.format;
  50         const struct v4l2_rect *crop = &rpf->crop;
  51         u32 pstride;
  52         u32 infmt;
  53
  54         if (!enable)
  55                 return 0;
  56
  57         /* Source size, stride and crop offsets.
  58          *
  59          * The crop offsets correspond to the location of the crop rectangle top
  60          * left corner in the plane buffer. Only two offsets are needed, as
  61          * planes 2 and 3 always have identical strides.
  62          */
  63         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  64                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  65                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  66         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
  67                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  68                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
  69
  70         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
  71                         + crop->left * fmtinfo->bpp[0] / 8;
  72         pstride = format->plane_fmt[0].bytesperline
  73                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
  74         if (format->num_planes > 1) {
  75                 rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
  76                                 + crop->left * fmtinfo->bpp[1] / 8;
  77                 pstride |= format->plane_fmt[1].bytesperline
  78                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
  79         }
  80
  81         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
  82
  83         /* Format */
  84         infmt = VI6_RPF_INFMT_CIPM
  85               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
  86
  87         if (fmtinfo->swap_yc)
  88                 infmt |= VI6_RPF_INFMT_SPYCS;
  89         if (fmtinfo->swap_uv)
  90                 infmt |= VI6_RPF_INFMT_SPUVS;
  91
  92         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
  93             rpf->entity.formats[RWPF_PAD_SOURCE].code)
  94                 infmt |= VI6_RPF_INFMT_CSC;
  95
  96         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
  97         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
  98
  99         /* Output location */
 100         vsp1_rpf_write(rpf, VI6_RPF_LOC,
 101                        (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 102                        (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 103
 104         /* Disable alpha, mask and color key. Set the alpha channel to a fixed
 105          * value of 255.
 106          */
 107         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_ASEL_FIXED);
 108         vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
 109                        255 << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 110         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 111         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
 112
 113         return 0;
 114 }
 115
 116 /* -----------------------------------------------------------------------------
 117  * V4L2 Subdevice Operations
 118  */
 119
 120 static struct v4l2_subdev_video_ops rpf_video_ops = {
 121         .s_stream = rpf_s_stream,
 122 };
 123
 124 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 125         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 126         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 127         .get_fmt = vsp1_rwpf_get_format,
 128         .set_fmt = vsp1_rwpf_set_format,
 129         .get_selection = vsp1_rwpf_get_selection,
 130         .set_selection = vsp1_rwpf_set_selection,
 131 };
 132
 133 static struct v4l2_subdev_ops rpf_ops = {
 134         .video  = &rpf_video_ops,
 135         .pad    = &rpf_pad_ops,
 136 };
 137
 138 /* -----------------------------------------------------------------------------
 139  * Video Device Operations
 140  */
 141
 142 static void rpf_vdev_queue(struct vsp1_video *video,
 143                            struct vsp1_video_buffer *buf)
 144 {
 145         struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
 146
 147         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 148                        buf->addr[0] + rpf->offsets[0]);
 149         if (buf->buf.num_planes > 1)
 150                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 151                                buf->addr[1] + rpf->offsets[1]);
 152         if (buf->buf.num_planes > 2)
 153                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 154                                buf->addr[2] + rpf->offsets[1]);
 155 }
 156
 157 static const struct vsp1_video_operations rpf_vdev_ops = {
 158         .queue = rpf_vdev_queue,
 159 };
 160
 161 /* -----------------------------------------------------------------------------
 162  * Initialization and Cleanup
 163  */
 164
 165 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 166 {
 167         struct v4l2_subdev *subdev;
 168         struct vsp1_video *video;
 169         struct vsp1_rwpf *rpf;
 170         int ret;
 171
 172         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 173         if (rpf == NULL)
 174                 return ERR_PTR(-ENOMEM);
 175
 176         rpf->max_width = RPF_MAX_WIDTH;
 177         rpf->max_height = RPF_MAX_HEIGHT;
 178
 179         rpf->entity.type = VSP1_ENTITY_RPF;
 180         rpf->entity.index = index;
 181
 182         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 183         if (ret < 0)
 184                 return ERR_PTR(ret);
 185
 186         /* Initialize the V4L2 subdev. */
 187         subdev = &rpf->entity.subdev;
 188         v4l2_subdev_init(subdev, &rpf_ops);
 189
 190         subdev->entity.ops = &vsp1_media_ops;
 191         subdev->internal_ops = &vsp1_subdev_internal_ops;
 192         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 193                  dev_name(vsp1->dev), index);
 194         v4l2_set_subdevdata(subdev, rpf);
 195         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 196
 197         vsp1_entity_init_formats(subdev, NULL);
 198
 199         /* Initialize the video device. */
 200         video = &rpf->video;
 201
 202         video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 203         video->vsp1 = vsp1;
 204         video->ops = &rpf_vdev_ops;
 205
 206         ret = vsp1_video_init(video, &rpf->entity);
 207         if (ret < 0)
 208                 goto error;
 209
 210         rpf->entity.video = video;
 211
 212         /* Connect the video device to the RPF. */
 213         ret = media_entity_create_link(&rpf->video.video.entity, 0,
 214                                        &rpf->entity.subdev.entity,
 215                                        RWPF_PAD_SINK,
 216                                        MEDIA_LNK_FL_ENABLED |
 217                                        MEDIA_LNK_FL_IMMUTABLE);
 218         if (ret < 0)
 219                 goto error;
 220
 221         return rpf;
 222
 223 error:
 224         vsp1_entity_destroy(&rpf->entity);
 225         return ERR_PTR(ret);
 226 }