drivers/media/platform/vsp1/vsp1_rpf.c

   1 /*
   2  * vsp1_rpf.c  --  R-Car VSP1 Read Pixel Formatter
   3  *
   4  * Copyright (C) 2013 Renesas 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         u32 pstride;
  51         u32 infmt;
  52
  53         if (!enable)
  54                 return 0;
  55
  56         /* Source size and stride. Cropping isn't supported yet. */
  57         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  58                        (format->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  59                        (format->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  60         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
  61                        (format->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  62                        (format->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
  63
  64         pstride = format->plane_fmt[0].bytesperline
  65                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
  66         if (format->num_planes > 1)
  67                 pstride |= format->plane_fmt[1].bytesperline
  68                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
  69
  70         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
  71
  72         /* Format */
  73         infmt = VI6_RPF_INFMT_CIPM
  74               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
  75
  76         if (fmtinfo->swap_yc)
  77                 infmt |= VI6_RPF_INFMT_SPYCS;
  78         if (fmtinfo->swap_uv)
  79                 infmt |= VI6_RPF_INFMT_SPUVS;
  80
  81         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
  82             rpf->entity.formats[RWPF_PAD_SOURCE].code)
  83                 infmt |= VI6_RPF_INFMT_CSC;
  84
  85         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
  86         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
  87
  88         /* Output location. Composing isn't supported yet. */
  89         vsp1_rpf_write(rpf, VI6_RPF_LOC, 0);
  90
  91         /* Disable alpha, mask and color key. Set the alpha channel to a fixed
  92          * value of 255.
  93          */
  94         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_ASEL_FIXED);
  95         vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
  96                        255 << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
  97         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
  98         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
  99
 100         return 0;
 101 }
 102
 103 /* -----------------------------------------------------------------------------
 104  * V4L2 Subdevice Operations
 105  */
 106
 107 static struct v4l2_subdev_video_ops rpf_video_ops = {
 108         .s_stream = rpf_s_stream,
 109 };
 110
 111 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 112         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 113         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 114         .get_fmt = vsp1_rwpf_get_format,
 115         .set_fmt = vsp1_rwpf_set_format,
 116 };
 117
 118 static struct v4l2_subdev_ops rpf_ops = {
 119         .video  = &rpf_video_ops,
 120         .pad    = &rpf_pad_ops,
 121 };
 122
 123 /* -----------------------------------------------------------------------------
 124  * Video Device Operations
 125  */
 126
 127 static void rpf_vdev_queue(struct vsp1_video *video,
 128                            struct vsp1_video_buffer *buf)
 129 {
 130         struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
 131
 132         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y, buf->addr[0]);
 133         if (buf->buf.num_planes > 1)
 134                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0, buf->addr[1]);
 135         if (buf->buf.num_planes > 2)
 136                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1, buf->addr[2]);
 137 }
 138
 139 static const struct vsp1_video_operations rpf_vdev_ops = {
 140         .queue = rpf_vdev_queue,
 141 };
 142
 143 /* -----------------------------------------------------------------------------
 144  * Initialization and Cleanup
 145  */
 146
 147 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 148 {
 149         struct v4l2_subdev *subdev;
 150         struct vsp1_video *video;
 151         struct vsp1_rwpf *rpf;
 152         int ret;
 153
 154         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 155         if (rpf == NULL)
 156                 return ERR_PTR(-ENOMEM);
 157
 158         rpf->max_width = RPF_MAX_WIDTH;
 159         rpf->max_height = RPF_MAX_HEIGHT;
 160
 161         rpf->entity.type = VSP1_ENTITY_RPF;
 162         rpf->entity.index = index;
 163         rpf->entity.id = VI6_DPR_NODE_RPF(index);
 164
 165         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 166         if (ret < 0)
 167                 return ERR_PTR(ret);
 168
 169         /* Initialize the V4L2 subdev. */
 170         subdev = &rpf->entity.subdev;
 171         v4l2_subdev_init(subdev, &rpf_ops);
 172
 173         subdev->entity.ops = &vsp1_media_ops;
 174         subdev->internal_ops = &vsp1_subdev_internal_ops;
 175         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 176                  dev_name(vsp1->dev), index);
 177         v4l2_set_subdevdata(subdev, rpf);
 178         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 179
 180         vsp1_entity_init_formats(subdev, NULL);
 181
 182         /* Initialize the video device. */
 183         video = &rpf->video;
 184
 185         video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 186         video->vsp1 = vsp1;
 187         video->ops = &rpf_vdev_ops;
 188
 189         ret = vsp1_video_init(video, &rpf->entity);
 190         if (ret < 0)
 191                 goto error_video;
 192
 193         /* Connect the video device to the RPF. */
 194         ret = media_entity_create_link(&rpf->video.video.entity, 0,
 195                                        &rpf->entity.subdev.entity,
 196                                        RWPF_PAD_SINK,
 197                                        MEDIA_LNK_FL_ENABLED |
 198                                        MEDIA_LNK_FL_IMMUTABLE);
 199         if (ret < 0)
 200                 goto error_link;
 201
 202         return rpf;
 203
 204 error_link:
 205         vsp1_video_cleanup(video);
 206 error_video:
 207         media_entity_cleanup(&rpf->entity.subdev.entity);
 208         return ERR_PTR(ret);
 209 }