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_write(rpf->entity.vsp1,
  32                    reg + rpf->entity.index * VI6_RPF_OFFSET, 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_rwpf *rpf = to_rwpf(subdev);
  72         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
  73         const struct v4l2_pix_format_mplane *format = &rpf->format;
  74         const struct v4l2_rect *crop = &rpf->crop;
  75         u32 pstride;
  76         u32 infmt;
  77         int ret;
  78
  79         ret = vsp1_entity_set_streaming(&rpf->entity, enable);
  80         if (ret < 0)
  81                 return ret;
  82
  83         if (!enable)
  84                 return 0;
  85
  86         /* Source size, stride and crop offsets.
  87          *
  88          * The crop offsets correspond to the location of the crop rectangle top
  89          * left corner in the plane buffer. Only two offsets are needed, as
  90          * planes 2 and 3 always have identical strides.
  91          */
  92         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  93                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  94                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  95         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
  96                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  97                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
  98
  99         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
 100                         + crop->left * fmtinfo->bpp[0] / 8;
 101         pstride = format->plane_fmt[0].bytesperline
 102                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
 103
 104         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 105                        rpf->buf_addr[0] + rpf->offsets[0]);
 106
 107         if (format->num_planes > 1) {
 108                 rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
 109                                 + crop->left * fmtinfo->bpp[1] / 8;
 110                 pstride |= format->plane_fmt[1].bytesperline
 111                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
 112
 113                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 114                                rpf->buf_addr[1] + rpf->offsets[1]);
 115
 116                 if (format->num_planes > 2)
 117                         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 118                                        rpf->buf_addr[2] + rpf->offsets[1]);
 119         }
 120
 121         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
 122
 123         /* Format */
 124         infmt = VI6_RPF_INFMT_CIPM
 125               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
 126
 127         if (fmtinfo->swap_yc)
 128                 infmt |= VI6_RPF_INFMT_SPYCS;
 129         if (fmtinfo->swap_uv)
 130                 infmt |= VI6_RPF_INFMT_SPUVS;
 131
 132         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
 133             rpf->entity.formats[RWPF_PAD_SOURCE].code)
 134                 infmt |= VI6_RPF_INFMT_CSC;
 135
 136         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
 137         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
 138
 139         /* Output location */
 140         vsp1_rpf_write(rpf, VI6_RPF_LOC,
 141                        (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 142                        (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 143
 144         /* Use the alpha channel (extended to 8 bits) when available or an
 145          * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 146          * otherwise. Disable color keying.
 147          */
 148         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 149                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 150                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 151         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 152         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
 153
 154         return 0;
 155 }
 156
 157 /* -----------------------------------------------------------------------------
 158  * V4L2 Subdevice Operations
 159  */
 160
 161 static struct v4l2_subdev_video_ops rpf_video_ops = {
 162         .s_stream = rpf_s_stream,
 163 };
 164
 165 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 166         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 167         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 168         .get_fmt = vsp1_rwpf_get_format,
 169         .set_fmt = vsp1_rwpf_set_format,
 170         .get_selection = vsp1_rwpf_get_selection,
 171         .set_selection = vsp1_rwpf_set_selection,
 172 };
 173
 174 static struct v4l2_subdev_ops rpf_ops = {
 175         .video  = &rpf_video_ops,
 176         .pad    = &rpf_pad_ops,
 177 };
 178
 179 /* -----------------------------------------------------------------------------
 180  * Video Device Operations
 181  */
 182
 183 static void rpf_set_memory(struct vsp1_rwpf *rpf, struct vsp1_rwpf_memory *mem)
 184 {
 185         unsigned int i;
 186
 187         for (i = 0; i < 3; ++i)
 188                 rpf->buf_addr[i] = mem->addr[i];
 189
 190         if (!vsp1_entity_is_streaming(&rpf->entity))
 191                 return;
 192
 193         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 194                        mem->addr[0] + rpf->offsets[0]);
 195         if (mem->num_planes > 1)
 196                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 197                                mem->addr[1] + rpf->offsets[1]);
 198         if (mem->num_planes > 2)
 199                 vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 200                                mem->addr[2] + rpf->offsets[1]);
 201 }
 202
 203 static const struct vsp1_rwpf_operations rpf_vdev_ops = {
 204         .set_memory = rpf_set_memory,
 205 };
 206
 207 /* -----------------------------------------------------------------------------
 208  * Initialization and Cleanup
 209  */
 210
 211 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 212 {
 213         struct v4l2_subdev *subdev;
 214         struct vsp1_rwpf *rpf;
 215         int ret;
 216
 217         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 218         if (rpf == NULL)
 219                 return ERR_PTR(-ENOMEM);
 220
 221         rpf->ops = &rpf_vdev_ops;
 222
 223         rpf->max_width = RPF_MAX_WIDTH;
 224         rpf->max_height = RPF_MAX_HEIGHT;
 225
 226         rpf->entity.type = VSP1_ENTITY_RPF;
 227         rpf->entity.index = index;
 228
 229         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 230         if (ret < 0)
 231                 return ERR_PTR(ret);
 232
 233         /* Initialize the V4L2 subdev. */
 234         subdev = &rpf->entity.subdev;
 235         v4l2_subdev_init(subdev, &rpf_ops);
 236
 237         subdev->entity.ops = &vsp1_media_ops;
 238         subdev->internal_ops = &vsp1_subdev_internal_ops;
 239         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 240                  dev_name(vsp1->dev), index);
 241         v4l2_set_subdevdata(subdev, rpf);
 242         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 243
 244         vsp1_entity_init_formats(subdev, NULL);
 245
 246         /* Initialize the control handler. */
 247         v4l2_ctrl_handler_init(&rpf->ctrls, 1);
 248         v4l2_ctrl_new_std(&rpf->ctrls, &rpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
 249                           0, 255, 1, 255);
 250
 251         rpf->entity.subdev.ctrl_handler = &rpf->ctrls;
 252
 253         if (rpf->ctrls.error) {
 254                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 255                         index);
 256                 ret = rpf->ctrls.error;
 257                 goto error;
 258         }
 259
 260         return rpf;
 261
 262 error:
 263         vsp1_entity_destroy(&rpf->entity);
 264         return ERR_PTR(ret);
 265 }