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  * V4L2 Subdevice Core Operations
  37  */
  38
  39 static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
  40 {
  41         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  42         struct vsp1_rwpf *rpf = to_rwpf(subdev);
  43         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
  44         const struct v4l2_pix_format_mplane *format = &rpf->format;
  45         const struct v4l2_rect *crop = &rpf->crop;
  46         u32 pstride;
  47         u32 infmt;
  48
  49         if (!enable)
  50                 return 0;
  51
  52         /* Source size, stride and crop offsets.
  53          *
  54          * The crop offsets correspond to the location of the crop rectangle top
  55          * left corner in the plane buffer. Only two offsets are needed, as
  56          * planes 2 and 3 always have identical strides.
  57          */
  58         vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
  59                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  60                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  61         vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
  62                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  63                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
  64
  65         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
  66                         + crop->left * fmtinfo->bpp[0] / 8;
  67         pstride = format->plane_fmt[0].bytesperline
  68                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
  69
  70         if (format->num_planes > 1) {
  71                 rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
  72                                 + crop->left * fmtinfo->bpp[1] / 8;
  73                 pstride |= format->plane_fmt[1].bytesperline
  74                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
  75         } else {
  76                 rpf->offsets[1] = 0;
  77         }
  78
  79         vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);
  80
  81         /* Now that the offsets have been computed program the DMA addresses. */
  82         rpf->ops->set_memory(rpf);
  83
  84         /* Format */
  85         infmt = VI6_RPF_INFMT_CIPM
  86               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
  87
  88         if (fmtinfo->swap_yc)
  89                 infmt |= VI6_RPF_INFMT_SPYCS;
  90         if (fmtinfo->swap_uv)
  91                 infmt |= VI6_RPF_INFMT_SPUVS;
  92
  93         if (rpf->entity.formats[RWPF_PAD_SINK].code !=
  94             rpf->entity.formats[RWPF_PAD_SOURCE].code)
  95                 infmt |= VI6_RPF_INFMT_CSC;
  96
  97         vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
  98         vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);
  99
 100         /* Output location */
 101         vsp1_rpf_write(rpf, VI6_RPF_LOC,
 102                        (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 103                        (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));
 104
 105         /* Use the alpha channel (extended to 8 bits) when available or an
 106          * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 107          * otherwise. Disable color keying.
 108          */
 109         vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 110                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 111                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 112
 113         vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
 114                        rpf->alpha << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 115
 116         vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, rpf->alpha);
 117
 118         vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 119         vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);
 120
 121         return 0;
 122 }
 123
 124 /* -----------------------------------------------------------------------------
 125  * V4L2 Subdevice Operations
 126  */
 127
 128 static struct v4l2_subdev_video_ops rpf_video_ops = {
 129         .s_stream = rpf_s_stream,
 130 };
 131
 132 static struct v4l2_subdev_pad_ops rpf_pad_ops = {
 133         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 134         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 135         .get_fmt = vsp1_rwpf_get_format,
 136         .set_fmt = vsp1_rwpf_set_format,
 137         .get_selection = vsp1_rwpf_get_selection,
 138         .set_selection = vsp1_rwpf_set_selection,
 139 };
 140
 141 static struct v4l2_subdev_ops rpf_ops = {
 142         .video  = &rpf_video_ops,
 143         .pad    = &rpf_pad_ops,
 144 };
 145
 146 /* -----------------------------------------------------------------------------
 147  * Video Device Operations
 148  */
 149
 150 static void rpf_set_memory(struct vsp1_rwpf *rpf)
 151 {
 152         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 153                        rpf->buf_addr[0] + rpf->offsets[0]);
 154         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 155                        rpf->buf_addr[1] + rpf->offsets[1]);
 156         vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 157                        rpf->buf_addr[2] + rpf->offsets[1]);
 158 }
 159
 160 static const struct vsp1_rwpf_operations rpf_vdev_ops = {
 161         .set_memory = rpf_set_memory,
 162 };
 163
 164 /* -----------------------------------------------------------------------------
 165  * Initialization and Cleanup
 166  */
 167
 168 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 169 {
 170         struct v4l2_subdev *subdev;
 171         struct vsp1_rwpf *rpf;
 172         int ret;
 173
 174         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 175         if (rpf == NULL)
 176                 return ERR_PTR(-ENOMEM);
 177
 178         rpf->ops = &rpf_vdev_ops;
 179
 180         rpf->max_width = RPF_MAX_WIDTH;
 181         rpf->max_height = RPF_MAX_HEIGHT;
 182
 183         rpf->entity.type = VSP1_ENTITY_RPF;
 184         rpf->entity.index = index;
 185
 186         ret = vsp1_entity_init(vsp1, &rpf->entity, 2);
 187         if (ret < 0)
 188                 return ERR_PTR(ret);
 189
 190         /* Initialize the V4L2 subdev. */
 191         subdev = &rpf->entity.subdev;
 192         v4l2_subdev_init(subdev, &rpf_ops);
 193
 194         subdev->entity.ops = &vsp1->media_ops;
 195         subdev->internal_ops = &vsp1_subdev_internal_ops;
 196         snprintf(subdev->name, sizeof(subdev->name), "%s rpf.%u",
 197                  dev_name(vsp1->dev), index);
 198         v4l2_set_subdevdata(subdev, rpf);
 199         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 200
 201         vsp1_entity_init_formats(subdev, NULL);
 202
 203         /* Initialize the control handler. */
 204         ret = vsp1_rwpf_init_ctrls(rpf);
 205         if (ret < 0) {
 206                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 207                         index);
 208                 goto error;
 209         }
 210
 211         return rpf;
 212
 213 error:
 214         vsp1_entity_destroy(&rpf->entity);
 215         return ERR_PTR(ret);
 216 }