drivers/media/platform/vsp1/vsp1_wpf.c

   1 /*
   2  * vsp1_wpf.c  --  R-Car VSP1 Write 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 WPF_MAX_WIDTH                           2048
  23 #define WPF_MAX_HEIGHT                          2048
  24
  25 /* -----------------------------------------------------------------------------
  26  * Device Access
  27  */
  28
  29 static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
  30 {
  31         return vsp1_read(wpf->entity.vsp1,
  32                          reg + wpf->entity.index * VI6_WPF_OFFSET);
  33 }
  34
  35 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
  36 {
  37         vsp1_write(wpf->entity.vsp1,
  38                    reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  39 }
  40
  41 /* -----------------------------------------------------------------------------
  42  * V4L2 Subdevice Core Operations
  43  */
  44
  45 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
  46 {
  47         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  48         struct vsp1_pipeline *pipe =
  49                 to_vsp1_pipeline(&wpf->entity.subdev.entity);
  50         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  51         const struct v4l2_rect *crop = &wpf->crop;
  52         unsigned int i;
  53         u32 srcrpf = 0;
  54         u32 outfmt = 0;
  55
  56         if (!enable) {
  57                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  58                 return 0;
  59         }
  60
  61         /* Sources */
  62         for (i = 0; i < pipe->num_inputs; ++i) {
  63                 struct vsp1_rwpf *input = pipe->inputs[i];
  64
  65                 srcrpf |= VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index);
  66         }
  67
  68         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
  69
  70         /* Destination stride. */
  71         if (!pipe->lif) {
  72                 struct v4l2_pix_format_mplane *format = &wpf->video.format;
  73
  74                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
  75                                format->plane_fmt[0].bytesperline);
  76                 if (format->num_planes > 1)
  77                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
  78                                        format->plane_fmt[1].bytesperline);
  79         }
  80
  81         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
  82                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
  83                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
  84         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
  85                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
  86                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
  87
  88         /* Format */
  89         if (!pipe->lif) {
  90                 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
  91
  92                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
  93
  94                 if (fmtinfo->swap_yc)
  95                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
  96                 if (fmtinfo->swap_uv)
  97                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
  98
  99                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 100         }
 101
 102         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 103             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 104                 outfmt |= VI6_WPF_OUTFMT_CSC;
 105
 106         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 107
 108         vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 109                    VI6_DPR_WPF_FPORCH_FP_WPFN);
 110
 111         vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
 112
 113         /* Enable interrupts */
 114         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 115         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 116                    VI6_WFP_IRQ_ENB_FREE);
 117
 118         return 0;
 119 }
 120
 121 /* -----------------------------------------------------------------------------
 122  * V4L2 Subdevice Operations
 123  */
 124
 125 static struct v4l2_subdev_video_ops wpf_video_ops = {
 126         .s_stream = wpf_s_stream,
 127 };
 128
 129 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 130         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 131         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 132         .get_fmt = vsp1_rwpf_get_format,
 133         .set_fmt = vsp1_rwpf_set_format,
 134         .get_selection = vsp1_rwpf_get_selection,
 135         .set_selection = vsp1_rwpf_set_selection,
 136 };
 137
 138 static struct v4l2_subdev_ops wpf_ops = {
 139         .video  = &wpf_video_ops,
 140         .pad    = &wpf_pad_ops,
 141 };
 142
 143 /* -----------------------------------------------------------------------------
 144  * Video Device Operations
 145  */
 146
 147 static void wpf_vdev_queue(struct vsp1_video *video,
 148                            struct vsp1_video_buffer *buf)
 149 {
 150         struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
 151
 152         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
 153         if (buf->buf.num_planes > 1)
 154                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
 155         if (buf->buf.num_planes > 2)
 156                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
 157 }
 158
 159 static const struct vsp1_video_operations wpf_vdev_ops = {
 160         .queue = wpf_vdev_queue,
 161 };
 162
 163 /* -----------------------------------------------------------------------------
 164  * Initialization and Cleanup
 165  */
 166
 167 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 168 {
 169         struct v4l2_subdev *subdev;
 170         struct vsp1_video *video;
 171         struct vsp1_rwpf *wpf;
 172         unsigned int flags;
 173         int ret;
 174
 175         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 176         if (wpf == NULL)
 177                 return ERR_PTR(-ENOMEM);
 178
 179         wpf->max_width = WPF_MAX_WIDTH;
 180         wpf->max_height = WPF_MAX_HEIGHT;
 181
 182         wpf->entity.type = VSP1_ENTITY_WPF;
 183         wpf->entity.index = index;
 184         wpf->entity.id = VI6_DPR_NODE_WPF(index);
 185
 186         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 187         if (ret < 0)
 188                 return ERR_PTR(ret);
 189
 190         /* Initialize the V4L2 subdev. */
 191         subdev = &wpf->entity.subdev;
 192         v4l2_subdev_init(subdev, &wpf_ops);
 193
 194         subdev->entity.ops = &vsp1_media_ops;
 195         subdev->internal_ops = &vsp1_subdev_internal_ops;
 196         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 197                  dev_name(vsp1->dev), index);
 198         v4l2_set_subdevdata(subdev, wpf);
 199         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 200
 201         vsp1_entity_init_formats(subdev, NULL);
 202
 203         /* Initialize the video device. */
 204         video = &wpf->video;
 205
 206         video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 207         video->vsp1 = vsp1;
 208         video->ops = &wpf_vdev_ops;
 209
 210         ret = vsp1_video_init(video, &wpf->entity);
 211         if (ret < 0)
 212                 goto error_video;
 213
 214         /* Connect the video device to the WPF. All connections are immutable
 215          * except for the WPF0 source link if a LIF is present.
 216          */
 217         flags = MEDIA_LNK_FL_ENABLED;
 218         if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
 219                 flags |= MEDIA_LNK_FL_IMMUTABLE;
 220
 221         ret = media_entity_create_link(&wpf->entity.subdev.entity,
 222                                        RWPF_PAD_SOURCE,
 223                                        &wpf->video.video.entity, 0, flags);
 224         if (ret < 0)
 225                 goto error_link;
 226
 227         wpf->entity.sink = &wpf->video.video.entity;
 228
 229         return wpf;
 230
 231 error_link:
 232         vsp1_video_cleanup(video);
 233 error_video:
 234         media_entity_cleanup(&wpf->entity.subdev.entity);
 235         return ERR_PTR(ret);
 236 }