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_mbus_framefmt *format =
  52                 &wpf->entity.formats[RWPF_PAD_SOURCE];
  53         unsigned int i;
  54         u32 srcrpf = 0;
  55         u32 outfmt = 0;
  56
  57         if (!enable) {
  58                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  59                 return 0;
  60         }
  61
  62         /* Sources */
  63         for (i = 0; i < pipe->num_inputs; ++i) {
  64                 struct vsp1_rwpf *input = pipe->inputs[i];
  65
  66                 srcrpf |= VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index);
  67         }
  68
  69         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
  70
  71         /* Destination stride. Cropping isn't supported yet. */
  72         if (!pipe->lif) {
  73                 struct v4l2_pix_format_mplane *format = &wpf->video.format;
  74
  75                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
  76                                format->plane_fmt[0].bytesperline);
  77                 if (format->num_planes > 1)
  78                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
  79                                        format->plane_fmt[1].bytesperline);
  80         }
  81
  82         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP,
  83                        format->width << VI6_WPF_SZCLIP_SIZE_SHIFT);
  84         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP,
  85                        format->height << VI6_WPF_SZCLIP_SIZE_SHIFT);
  86
  87         /* Format */
  88         if (!pipe->lif) {
  89                 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
  90
  91                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
  92
  93                 if (fmtinfo->swap_yc)
  94                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
  95                 if (fmtinfo->swap_uv)
  96                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
  97
  98                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
  99         }
 100
 101         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 102             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 103                 outfmt |= VI6_WPF_OUTFMT_CSC;
 104
 105         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 106
 107         vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 108                    VI6_DPR_WPF_FPORCH_FP_WPFN);
 109
 110         vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
 111
 112         /* Enable interrupts */
 113         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 114         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 115                    VI6_WFP_IRQ_ENB_FREE);
 116
 117         return 0;
 118 }
 119
 120 /* -----------------------------------------------------------------------------
 121  * V4L2 Subdevice Operations
 122  */
 123
 124 static struct v4l2_subdev_video_ops wpf_video_ops = {
 125         .s_stream = wpf_s_stream,
 126 };
 127
 128 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 129         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 130         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 131         .get_fmt = vsp1_rwpf_get_format,
 132         .set_fmt = vsp1_rwpf_set_format,
 133 };
 134
 135 static struct v4l2_subdev_ops wpf_ops = {
 136         .video  = &wpf_video_ops,
 137         .pad    = &wpf_pad_ops,
 138 };
 139
 140 /* -----------------------------------------------------------------------------
 141  * Video Device Operations
 142  */
 143
 144 static void wpf_vdev_queue(struct vsp1_video *video,
 145                            struct vsp1_video_buffer *buf)
 146 {
 147         struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
 148
 149         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
 150         if (buf->buf.num_planes > 1)
 151                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
 152         if (buf->buf.num_planes > 2)
 153                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
 154 }
 155
 156 static const struct vsp1_video_operations wpf_vdev_ops = {
 157         .queue = wpf_vdev_queue,
 158 };
 159
 160 /* -----------------------------------------------------------------------------
 161  * Initialization and Cleanup
 162  */
 163
 164 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 165 {
 166         struct v4l2_subdev *subdev;
 167         struct vsp1_video *video;
 168         struct vsp1_rwpf *wpf;
 169         unsigned int flags;
 170         int ret;
 171
 172         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 173         if (wpf == NULL)
 174                 return ERR_PTR(-ENOMEM);
 175
 176         wpf->max_width = WPF_MAX_WIDTH;
 177         wpf->max_height = WPF_MAX_HEIGHT;
 178
 179         wpf->entity.type = VSP1_ENTITY_WPF;
 180         wpf->entity.index = index;
 181         wpf->entity.id = VI6_DPR_NODE_WPF(index);
 182
 183         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 184         if (ret < 0)
 185                 return ERR_PTR(ret);
 186
 187         /* Initialize the V4L2 subdev. */
 188         subdev = &wpf->entity.subdev;
 189         v4l2_subdev_init(subdev, &wpf_ops);
 190
 191         subdev->entity.ops = &vsp1_media_ops;
 192         subdev->internal_ops = &vsp1_subdev_internal_ops;
 193         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 194                  dev_name(vsp1->dev), index);
 195         v4l2_set_subdevdata(subdev, wpf);
 196         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 197
 198         vsp1_entity_init_formats(subdev, NULL);
 199
 200         /* Initialize the video device. */
 201         video = &wpf->video;
 202
 203         video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 204         video->vsp1 = vsp1;
 205         video->ops = &wpf_vdev_ops;
 206
 207         ret = vsp1_video_init(video, &wpf->entity);
 208         if (ret < 0)
 209                 goto error_video;
 210
 211         /* Connect the video device to the WPF. All connections are immutable
 212          * except for the WPF0 source link if a LIF is present.
 213          */
 214         flags = MEDIA_LNK_FL_ENABLED;
 215         if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
 216                 flags |= MEDIA_LNK_FL_IMMUTABLE;
 217
 218         ret = media_entity_create_link(&wpf->entity.subdev.entity,
 219                                        RWPF_PAD_SOURCE,
 220                                        &wpf->video.video.entity, 0, flags);
 221         if (ret < 0)
 222                 goto error_link;
 223
 224         wpf->entity.sink = &wpf->video.video.entity;
 225
 226         return wpf;
 227
 228 error_link:
 229         vsp1_video_cleanup(video);
 230 error_video:
 231         media_entity_cleanup(&wpf->entity.subdev.entity);
 232         return ERR_PTR(ret);
 233 }