drivers/media/platform/vsp1/vsp1_wpf.c

   1 /*
   2  * vsp1_wpf.c  --  R-Car VSP1 Write 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 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_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  48         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  49         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  50         const struct v4l2_rect *crop = &wpf->crop;
  51         unsigned int i;
  52         u32 srcrpf = 0;
  53         u32 outfmt = 0;
  54
  55         if (!enable) {
  56                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  57                 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
  58                 return 0;
  59         }
  60
  61         /* Sources. If the pipeline has a single input configure it as the
  62          * master layer. Otherwise configure all inputs as sub-layers and
  63          * select the virtual RPF as the master layer.
  64          */
  65         for (i = 0; i < pipe->num_inputs; ++i) {
  66                 struct vsp1_rwpf *input = pipe->inputs[i];
  67
  68                 srcrpf |= pipe->num_inputs == 1
  69                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
  70                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
  71         }
  72
  73         if (pipe->num_inputs > 1)
  74                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
  75
  76         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
  77
  78         /* Destination stride. */
  79         if (!pipe->lif) {
  80                 struct v4l2_pix_format_mplane *format = &wpf->video.format;
  81
  82                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
  83                                format->plane_fmt[0].bytesperline);
  84                 if (format->num_planes > 1)
  85                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
  86                                        format->plane_fmt[1].bytesperline);
  87         }
  88
  89         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
  90                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
  91                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
  92         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
  93                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
  94                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
  95
  96         /* Format */
  97         if (!pipe->lif) {
  98                 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
  99
 100                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 101
 102                 if (fmtinfo->swap_yc)
 103                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 104                 if (fmtinfo->swap_uv)
 105                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 106
 107                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 108         }
 109
 110         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 111             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 112                 outfmt |= VI6_WPF_OUTFMT_CSC;
 113
 114         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 115
 116         vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 117                    VI6_DPR_WPF_FPORCH_FP_WPFN);
 118
 119         vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
 120
 121         /* Enable interrupts */
 122         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 123         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 124                    VI6_WFP_IRQ_ENB_FREE);
 125
 126         return 0;
 127 }
 128
 129 /* -----------------------------------------------------------------------------
 130  * V4L2 Subdevice Operations
 131  */
 132
 133 static struct v4l2_subdev_video_ops wpf_video_ops = {
 134         .s_stream = wpf_s_stream,
 135 };
 136
 137 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 138         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 139         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 140         .get_fmt = vsp1_rwpf_get_format,
 141         .set_fmt = vsp1_rwpf_set_format,
 142         .get_selection = vsp1_rwpf_get_selection,
 143         .set_selection = vsp1_rwpf_set_selection,
 144 };
 145
 146 static struct v4l2_subdev_ops wpf_ops = {
 147         .video  = &wpf_video_ops,
 148         .pad    = &wpf_pad_ops,
 149 };
 150
 151 /* -----------------------------------------------------------------------------
 152  * Video Device Operations
 153  */
 154
 155 static void wpf_vdev_queue(struct vsp1_video *video,
 156                            struct vsp1_video_buffer *buf)
 157 {
 158         struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
 159
 160         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
 161         if (buf->buf.num_planes > 1)
 162                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
 163         if (buf->buf.num_planes > 2)
 164                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
 165 }
 166
 167 static const struct vsp1_video_operations wpf_vdev_ops = {
 168         .queue = wpf_vdev_queue,
 169 };
 170
 171 /* -----------------------------------------------------------------------------
 172  * Initialization and Cleanup
 173  */
 174
 175 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 176 {
 177         struct v4l2_subdev *subdev;
 178         struct vsp1_video *video;
 179         struct vsp1_rwpf *wpf;
 180         unsigned int flags;
 181         int ret;
 182
 183         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 184         if (wpf == NULL)
 185                 return ERR_PTR(-ENOMEM);
 186
 187         wpf->max_width = WPF_MAX_WIDTH;
 188         wpf->max_height = WPF_MAX_HEIGHT;
 189
 190         wpf->entity.type = VSP1_ENTITY_WPF;
 191         wpf->entity.index = index;
 192
 193         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 194         if (ret < 0)
 195                 return ERR_PTR(ret);
 196
 197         /* Initialize the V4L2 subdev. */
 198         subdev = &wpf->entity.subdev;
 199         v4l2_subdev_init(subdev, &wpf_ops);
 200
 201         subdev->entity.ops = &vsp1_media_ops;
 202         subdev->internal_ops = &vsp1_subdev_internal_ops;
 203         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 204                  dev_name(vsp1->dev), index);
 205         v4l2_set_subdevdata(subdev, wpf);
 206         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 207
 208         vsp1_entity_init_formats(subdev, NULL);
 209
 210         /* Initialize the video device. */
 211         video = &wpf->video;
 212
 213         video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 214         video->vsp1 = vsp1;
 215         video->ops = &wpf_vdev_ops;
 216
 217         ret = vsp1_video_init(video, &wpf->entity);
 218         if (ret < 0)
 219                 goto error;
 220
 221         wpf->entity.video = video;
 222
 223         /* Connect the video device to the WPF. All connections are immutable
 224          * except for the WPF0 source link if a LIF is present.
 225          */
 226         flags = MEDIA_LNK_FL_ENABLED;
 227         if (!(vsp1->pdata->features & VSP1_HAS_LIF) || index != 0)
 228                 flags |= MEDIA_LNK_FL_IMMUTABLE;
 229
 230         ret = media_entity_create_link(&wpf->entity.subdev.entity,
 231                                        RWPF_PAD_SOURCE,
 232                                        &wpf->video.video.entity, 0, flags);
 233         if (ret < 0)
 234                 goto error;
 235
 236         wpf->entity.sink = &wpf->video.video.entity;
 237
 238         return wpf;
 239
 240 error:
 241         vsp1_entity_destroy(&wpf->entity);
 242         return ERR_PTR(ret);
 243 }