kernel/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  * Controls
  43  */
  44
  45 static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
  46 {
  47         struct vsp1_rwpf *wpf =
  48                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  49         u32 value;
  50
  51         if (!vsp1_entity_is_streaming(&wpf->entity))
  52                 return 0;
  53
  54         switch (ctrl->id) {
  55         case V4L2_CID_ALPHA_COMPONENT:
  56                 value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
  57                 value &= ~VI6_WPF_OUTFMT_PDV_MASK;
  58                 value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
  59                 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
  60                 break;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
  67         .s_ctrl = wpf_s_ctrl,
  68 };
  69
  70 /* -----------------------------------------------------------------------------
  71  * V4L2 Subdevice Core Operations
  72  */
  73
  74 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
  75 {
  76         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  77         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  78         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  79         const struct v4l2_rect *crop = &wpf->crop;
  80         unsigned int i;
  81         u32 srcrpf = 0;
  82         u32 outfmt = 0;
  83         int ret;
  84
  85         ret = vsp1_entity_set_streaming(&wpf->entity, enable);
  86         if (ret < 0)
  87                 return ret;
  88
  89         if (!enable) {
  90                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  91                 vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
  92                 return 0;
  93         }
  94
  95         /* Sources. If the pipeline has a single input and BRU is not used,
  96          * configure it as the master layer. Otherwise configure all
  97          * inputs as sub-layers and select the virtual RPF as the master
  98          * layer.
  99          */
 100         for (i = 0; i < pipe->num_inputs; ++i) {
 101                 struct vsp1_rwpf *input = pipe->inputs[i];
 102
 103                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 104                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 105                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 106         }
 107
 108         if (pipe->bru || pipe->num_inputs > 1)
 109                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 110
 111         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
 112
 113         /* Destination stride. */
 114         if (!pipe->lif) {
 115                 struct v4l2_pix_format_mplane *format = &wpf->video.format;
 116
 117                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
 118                                format->plane_fmt[0].bytesperline);
 119                 if (format->num_planes > 1)
 120                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
 121                                        format->plane_fmt[1].bytesperline);
 122         }
 123
 124         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 125                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 126                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 127         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 128                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 129                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 130
 131         /* Format */
 132         if (!pipe->lif) {
 133                 const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;
 134
 135                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 136
 137                 if (fmtinfo->alpha)
 138                         outfmt |= VI6_WPF_OUTFMT_PXA;
 139                 if (fmtinfo->swap_yc)
 140                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 141                 if (fmtinfo->swap_uv)
 142                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 143
 144                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 145         }
 146
 147         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 148             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 149                 outfmt |= VI6_WPF_OUTFMT_CSC;
 150
 151         /* Take the control handler lock to ensure that the PDV value won't be
 152          * changed behind our back by a set control operation.
 153          */
 154         mutex_lock(wpf->ctrls.lock);
 155         outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
 156         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 157         mutex_unlock(wpf->ctrls.lock);
 158
 159         vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 160                    VI6_DPR_WPF_FPORCH_FP_WPFN);
 161
 162         vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);
 163
 164         /* Enable interrupts */
 165         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 166         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 167                    VI6_WFP_IRQ_ENB_FREE);
 168
 169         return 0;
 170 }
 171
 172 /* -----------------------------------------------------------------------------
 173  * V4L2 Subdevice Operations
 174  */
 175
 176 static struct v4l2_subdev_video_ops wpf_video_ops = {
 177         .s_stream = wpf_s_stream,
 178 };
 179
 180 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 181         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 182         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 183         .get_fmt = vsp1_rwpf_get_format,
 184         .set_fmt = vsp1_rwpf_set_format,
 185         .get_selection = vsp1_rwpf_get_selection,
 186         .set_selection = vsp1_rwpf_set_selection,
 187 };
 188
 189 static struct v4l2_subdev_ops wpf_ops = {
 190         .video  = &wpf_video_ops,
 191         .pad    = &wpf_pad_ops,
 192 };
 193
 194 /* -----------------------------------------------------------------------------
 195  * Video Device Operations
 196  */
 197
 198 static void wpf_vdev_queue(struct vsp1_video *video,
 199                            struct vsp1_video_buffer *buf)
 200 {
 201         struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);
 202
 203         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
 204         if (buf->buf.num_planes > 1)
 205                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
 206         if (buf->buf.num_planes > 2)
 207                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
 208 }
 209
 210 static const struct vsp1_video_operations wpf_vdev_ops = {
 211         .queue = wpf_vdev_queue,
 212 };
 213
 214 /* -----------------------------------------------------------------------------
 215  * Initialization and Cleanup
 216  */
 217
 218 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 219 {
 220         struct v4l2_subdev *subdev;
 221         struct vsp1_video *video;
 222         struct vsp1_rwpf *wpf;
 223         unsigned int flags;
 224         int ret;
 225
 226         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 227         if (wpf == NULL)
 228                 return ERR_PTR(-ENOMEM);
 229
 230         wpf->max_width = WPF_MAX_WIDTH;
 231         wpf->max_height = WPF_MAX_HEIGHT;
 232
 233         wpf->entity.type = VSP1_ENTITY_WPF;
 234         wpf->entity.index = index;
 235
 236         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 237         if (ret < 0)
 238                 return ERR_PTR(ret);
 239
 240         /* Initialize the V4L2 subdev. */
 241         subdev = &wpf->entity.subdev;
 242         v4l2_subdev_init(subdev, &wpf_ops);
 243
 244         subdev->entity.ops = &vsp1_media_ops;
 245         subdev->internal_ops = &vsp1_subdev_internal_ops;
 246         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 247                  dev_name(vsp1->dev), index);
 248         v4l2_set_subdevdata(subdev, wpf);
 249         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 250
 251         vsp1_entity_init_formats(subdev, NULL);
 252
 253         /* Initialize the control handler. */
 254         v4l2_ctrl_handler_init(&wpf->ctrls, 1);
 255         v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
 256                           0, 255, 1, 255);
 257
 258         wpf->entity.subdev.ctrl_handler = &wpf->ctrls;
 259
 260         if (wpf->ctrls.error) {
 261                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 262                         index);
 263                 ret = wpf->ctrls.error;
 264                 goto error;
 265         }
 266
 267         /* Initialize the video device. */
 268         video = &wpf->video;
 269
 270         video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 271         video->vsp1 = vsp1;
 272         video->ops = &wpf_vdev_ops;
 273
 274         ret = vsp1_video_init(video, &wpf->entity);
 275         if (ret < 0)
 276                 goto error;
 277
 278         wpf->entity.video = video;
 279
 280         /* Connect the video device to the WPF. All connections are immutable
 281          * except for the WPF0 source link if a LIF is present.
 282          */
 283         flags = MEDIA_LNK_FL_ENABLED;
 284         if (!(vsp1->pdata.features & VSP1_HAS_LIF) || index != 0)
 285                 flags |= MEDIA_LNK_FL_IMMUTABLE;
 286
 287         ret = media_entity_create_link(&wpf->entity.subdev.entity,
 288                                        RWPF_PAD_SOURCE,
 289                                        &wpf->video.video.entity, 0, flags);
 290         if (ret < 0)
 291                 goto error;
 292
 293         wpf->entity.sink = &wpf->video.video.entity;
 294
 295         return wpf;
 296
 297 error:
 298         vsp1_entity_destroy(&wpf->entity);
 299         return ERR_PTR(ret);
 300 }