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  * Controls
  43  */
  44
  45 static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
  46 {
  47         struct vsp1_rwpf *rpf =
  48                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  49         struct vsp1_pipeline *pipe;
  50
  51         if (!vsp1_entity_is_streaming(&rpf->entity))
  52                 return 0;
  53
  54         switch (ctrl->id) {
  55         case V4L2_CID_ALPHA_COMPONENT:
  56                 vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
  57                                ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
  58
  59                 pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
  60                 vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
  61                 break;
  62         }
  63
  64         return 0;
  65 }
  66
  67 static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
  68         .s_ctrl = rpf_s_ctrl,
  69 };
  70
  71 /* -----------------------------------------------------------------------------
  72  * V4L2 Subdevice Core Operations
  73  */
  74
  75 static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
  76 {
  77         struct vsp1_rwpf *rpf = to_rwpf(subdev);
  78         const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
  79         const struct v4l2_pix_format_mplane *format = &rpf->video.format;
  80         const struct v4l2_rect *crop = &rpf->crop;
  81         u32 pstride;
  82         u32 infmt;
  83         int ret;
  84
  85         ret = vsp1_entity_set_streaming(&rpf->entity, enable);
  86         if (ret < 0)
  87                 return ret;
  88
  89         if (!enable)
  90                 return 0;
  91
  92         /* Source size, stride and crop offsets.
  93          *
  94          * The crop offsets correspond to the location of the crop rectangle top
  95          * left corner in the plane buffer. Only two offsets are needed, as
  96          * planes 2 and 3 always have identical strides.
  97          */
  98         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  99                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
 100                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
 101         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
 102                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
 103                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
 104
 105         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
 106                         + crop->left * fmtinfo->bpp[0] / 8;
 107         pstride = format->plane_fmt[0].bytesperline
 108                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
 109         if (format->num_planes > 1) {
 110                 rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
 111                                 + crop->left * fmtinfo->bpp[1] / 8;
 112                 pstride |= format->plane_fmt[1].bytesperline
 113                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
 114         }
 115
 116         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
 117
 118         /* Format */
 119         infmt = VI6_RPF_INFMT_CIPM
 120               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
 121
 122         if (fmtinfo->swap_yc)
 123                 infmt |= VI6_RPF_INFMT_SPYCS;
 124         if (fmtinfo->swap_uv)
 125                 infmt |= VI6_RPF_INFMT_SPUVS;
 126
 127         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
 128             rpf->entity.formats[RWPF_PAD_SOURCE].code)
 129                 infmt |= VI6_RPF_INFMT_CSC;
 130
 131         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
 132         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
 133
 134         /* Output location */
 135         vsp1_rpf_write(rpf, VI6_RPF_LOC,
 136                        (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 137                        (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 138
 139         /* Use the alpha channel (extended to 8 bits) when available or an
 140          * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 141          * otherwise. Disable color keying.
 142          */
 143         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 144                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 145                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 146         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 147         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
 148
 149         return 0;
 150 }
 151
 152 /* -----------------------------------------------------------------------------
 153  * V4L2 Subdevice Operations
 154  */
 155
 156 static struct v4l2_subdev_video_ops rpf_video_ops = {
 157         .s_stream = rpf_s_stream,
 158 };
 159
 160 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 161         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 162         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 163         .get_fmt = vsp1_rwpf_get_format,
 164         .set_fmt = vsp1_rwpf_set_format,
 165         .get_selection = vsp1_rwpf_get_selection,
 166         .set_selection = vsp1_rwpf_set_selection,
 167 };
 168
 169 static struct v4l2_subdev_ops rpf_ops = {
 170         .video  = &rpf_video_ops,
 171         .pad    = &rpf_pad_ops,
 172 };
 173
 174 /* -----------------------------------------------------------------------------
 175  * Video Device Operations
 176  */
 177
 178 static void rpf_vdev_queue(struct vsp1_video *video,
 179                            struct vsp1_video_buffer *buf)
 180 {
 181         struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
 182
 183         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 184                        buf->addr[0] + rpf->offsets[0]);
 185         if (buf->buf.num_planes > 1)
 186                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 187                                buf->addr[1] + rpf->offsets[1]);
 188         if (buf->buf.num_planes > 2)
 189                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 190                                buf->addr[2] + rpf->offsets[1]);
 191 }
 192
 193 static const struct vsp1_video_operations rpf_vdev_ops = {
 194         .queue = rpf_vdev_queue,
 195 };
 196
 197 /* -----------------------------------------------------------------------------
 198  * Initialization and Cleanup
 199  */
 200
 201 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 202 {
 203         struct v4l2_subdev *subdev;
 204         struct vsp1_video *video;
 205         struct vsp1_rwpf *rpf;
 206         int ret;
 207
 208         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 209         if (rpf == NULL)
 210                 return ERR_PTR(-ENOMEM);
 211
 212         rpf->max_width = RPF_MAX_WIDTH;
 213         rpf->max_height = RPF_MAX_HEIGHT;
 214
 215         rpf->entity.type = VSP1_ENTITY_RPF;
 216         rpf->entity.index = index;
 217
 218         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 219         if (ret < 0)
 220                 return ERR_PTR(ret);
 221
 222         /* Initialize the V4L2 subdev. */
 223         subdev = &rpf->entity.subdev;
 224         v4l2_subdev_init(subdev, &rpf_ops);
 225
 226         subdev->entity.ops = &vsp1_media_ops;
 227         subdev->internal_ops = &vsp1_subdev_internal_ops;
 228         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 229                  dev_name(vsp1->dev), index);
 230         v4l2_set_subdevdata(subdev, rpf);
 231         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 232
 233         vsp1_entity_init_formats(subdev, NULL);
 234
 235         /* Initialize the control handler. */
 236         v4l2_ctrl_handler_init(&rpf->ctrls, 1);
 237         v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
 238                           0, 255, 1, 255);
 239
 240         rpf->entity.subdev.ctrl_handler = &rpf->ctrls;
 241
 242         if (rpf->ctrls.error) {
 243                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 244                         index);
 245                 ret = rpf->ctrls.error;
 246                 goto error;
 247         }
 248
 249         /* Initialize the video device. */
 250         video = &rpf->video;
 251
 252         video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 253         video->vsp1 = vsp1;
 254         video->ops = &rpf_vdev_ops;
 255
 256         ret = vsp1_video_init(video, &rpf->entity);
 257         if (ret < 0)
 258                 goto error;
 259
 260         rpf->entity.video = video;
 261
 262         /* Connect the video device to the RPF. */
 263         ret = media_entity_create_link(&rpf->video.video.entity, 0,
 264                                        &rpf->entity.subdev.entity,
 265                                        RWPF_PAD_SINK,
 266                                        MEDIA_LNK_FL_ENABLED |
 267                                        MEDIA_LNK_FL_IMMUTABLE);
 268         if (ret < 0)
 269                 goto error;
 270
 271         return rpf;
 272
 273 error:
 274         vsp1_entity_destroy(&rpf->entity);
 275         return ERR_PTR(ret);
 276 }