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 void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
  30 {
  31         vsp1_mod_write(&rpf->entity, reg + rpf->entity.index * VI6_RPF_OFFSET,
  32                        data);
  33 }
  34
  35 /* -----------------------------------------------------------------------------
  36  * Controls
  37  */
  38
  39 static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
  40 {
  41         struct vsp1_rwpf *rpf =
  42                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  43         struct vsp1_pipeline *pipe;
  44
  45         if (!vsp1_entity_is_streaming(&rpf->entity))
  46                 return 0;
  47
  48         switch (ctrl->id) {
  49         case V4L2_CID_ALPHA_COMPONENT:
  50                 vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
  51                                ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
  52
  53                 pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
  54                 vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
  55                 break;
  56         }
  57
  58         return 0;
  59 }
  60
  61 static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
  62         .s_ctrl = rpf_s_ctrl,
  63 };
  64
  65 /* -----------------------------------------------------------------------------
  66  * V4L2 Subdevice Core Operations
  67  */
  68
  69 static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
  70 {
  71         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  72         struct vsp1_rwpf *rpf = to_rwpf(subdev);
  73         struct vsp1_device *vsp1 = rpf->entity.vsp1;
  74         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
  75         const struct v4l2_pix_format_mplane *format = &rpf->format;
  76         const struct v4l2_rect *crop = &rpf->crop;
  77         u32 pstride;
  78         u32 infmt;
  79         int ret;
  80
  81         ret = vsp1_entity_set_streaming(&rpf->entity, enable);
  82         if (ret < 0)
  83                 return ret;
  84
  85         if (!enable)
  86                 return 0;
  87
  88         /* Source size, stride and crop offsets.
  89          *
  90          * The crop offsets correspond to the location of the crop rectangle top
  91          * left corner in the plane buffer. Only two offsets are needed, as
  92          * planes 2 and 3 always have identical strides.
  93          */
  94         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  95                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  96                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  97         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
  98                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  99                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
 100
 101         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
 102                         + crop->left * fmtinfo->bpp[0] / 8;
 103         pstride = format->plane_fmt[0].bytesperline
 104                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
 105
 106         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 107                        rpf->buf_addr[0] + rpf->offsets[0]);
 108
 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                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 116                                rpf->buf_addr[1] + rpf->offsets[1]);
 117
 118                 if (format->num_planes > 2)
 119                         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 120                                        rpf->buf_addr[2] + rpf->offsets[1]);
 121         }
 122
 123         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
 124
 125         /* Format */
 126         infmt = VI6_RPF_INFMT_CIPM
 127               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
 128
 129         if (fmtinfo->swap_yc)
 130                 infmt |= VI6_RPF_INFMT_SPYCS;
 131         if (fmtinfo->swap_uv)
 132                 infmt |= VI6_RPF_INFMT_SPUVS;
 133
 134         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
 135             rpf->entity.formats[RWPF_PAD_SOURCE].code)
 136                 infmt |= VI6_RPF_INFMT_CSC;
 137
 138         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
 139         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
 140
 141         /* Output location */
 142         vsp1_rpf_write(rpf, VI6_RPF_LOC,
 143                        (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 144                        (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 145
 146         /* Use the alpha channel (extended to 8 bits) when available or an
 147          * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 148          * otherwise. Disable color keying.
 149          */
 150         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 151                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 152                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 153
 154         if (vsp1->info->uapi)
 155                 mutex_lock(rpf->ctrls.lock);
 156         vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
 157                        rpf->alpha->cur.val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 158         vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, rpf->alpha->cur.val);
 159         if (vsp1->info->uapi)
 160                 mutex_unlock(rpf->ctrls.lock);
 161
 162         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 163         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
 164
 165         return 0;
 166 }
 167
 168 /* -----------------------------------------------------------------------------
 169  * V4L2 Subdevice Operations
 170  */
 171
 172 static struct v4l2_subdev_video_ops rpf_video_ops = {
 173         .s_stream = rpf_s_stream,
 174 };
 175
 176 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 177         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 178         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 179         .get_fmt = vsp1_rwpf_get_format,
 180         .set_fmt = vsp1_rwpf_set_format,
 181         .get_selection = vsp1_rwpf_get_selection,
 182         .set_selection = vsp1_rwpf_set_selection,
 183 };
 184
 185 static struct v4l2_subdev_ops rpf_ops = {
 186         .video  = &rpf_video_ops,
 187         .pad    = &rpf_pad_ops,
 188 };
 189
 190 /* -----------------------------------------------------------------------------
 191  * Video Device Operations
 192  */
 193
 194 static void rpf_set_memory(struct vsp1_rwpf *rpf, struct vsp1_rwpf_memory *mem)
 195 {
 196         unsigned int i;
 197
 198         for (i = 0; i < 3; ++i)
 199                 rpf->buf_addr[i] = mem->addr[i];
 200
 201         if (!vsp1_entity_is_streaming(&rpf->entity))
 202                 return;
 203
 204         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 205                        mem->addr[0] + rpf->offsets[0]);
 206         if (mem->num_planes > 1)
 207                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 208                                mem->addr[1] + rpf->offsets[1]);
 209         if (mem->num_planes > 2)
 210                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 211                                mem->addr[2] + rpf->offsets[1]);
 212 }
 213
 214 static const struct vsp1_rwpf_operations rpf_vdev_ops = {
 215         .set_memory = rpf_set_memory,
 216 };
 217
 218 /* -----------------------------------------------------------------------------
 219  * Initialization and Cleanup
 220  */
 221
 222 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 223 {
 224         struct v4l2_subdev *subdev;
 225         struct vsp1_rwpf *rpf;
 226         int ret;
 227
 228         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 229         if (rpf == NULL)
 230                 return ERR_PTR(-ENOMEM);
 231
 232         rpf->ops = &rpf_vdev_ops;
 233
 234         rpf->max_width = RPF_MAX_WIDTH;
 235         rpf->max_height = RPF_MAX_HEIGHT;
 236
 237         rpf->entity.type = VSP1_ENTITY_RPF;
 238         rpf->entity.index = index;
 239
 240         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 241         if (ret < 0)
 242                 return ERR_PTR(ret);
 243
 244         /* Initialize the V4L2 subdev. */
 245         subdev = &rpf->entity.subdev;
 246         v4l2_subdev_init(subdev, &rpf_ops);
 247
 248         subdev->entity.ops = &vsp1->media_ops;
 249         subdev->internal_ops = &vsp1_subdev_internal_ops;
 250         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 251                  dev_name(vsp1->dev), index);
 252         v4l2_set_subdevdata(subdev, rpf);
 253         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 254
 255         vsp1_entity_init_formats(subdev, NULL);
 256
 257         /* Initialize the control handler. */
 258         v4l2_ctrl_handler_init(&rpf->ctrls, 1);
 259         rpf->alpha = v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops,
 260                                        V4L2_CID_ALPHA_COMPONENT,
 261                                        0, 255, 1, 255);
 262
 263         rpf->entity.subdev.ctrl_handler = &rpf->ctrls;
 264
 265         if (rpf->ctrls.error) {
 266                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 267                         index);
 268                 ret = rpf->ctrls.error;
 269                 goto error;
 270         }
 271
 272         return rpf;
 273
 274 error:
 275         vsp1_entity_destroy(&rpf->entity);
 276         return ERR_PTR(ret);
 277 }