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_dl.h"
  20 #include "vsp1_rwpf.h"
  21 #include "vsp1_video.h"
  22
  23 #define RPF_MAX_WIDTH                           8190
  24 #define RPF_MAX_HEIGHT                          8190
  25
  26 /* -----------------------------------------------------------------------------
  27  * Device Access
  28  */
  29
  30 static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf,
  31                                   struct vsp1_dl_list *dl, u32 reg, u32 data)
  32 {
  33         vsp1_dl_list_write(dl, reg + rpf->entity.index * VI6_RPF_OFFSET, data);
  34 }
  35
  36 /* -----------------------------------------------------------------------------
  37  * V4L2 Subdevice Operations
  38  */
  39
  40 static struct v4l2_subdev_ops rpf_ops = {
  41         .pad    = &vsp1_rwpf_pad_ops,
  42 };
  43
  44 /* -----------------------------------------------------------------------------
  45  * VSP1 Entity Operations
  46  */
  47
  48 static void rpf_set_memory(struct vsp1_entity *entity, struct vsp1_dl_list *dl)
  49 {
  50         struct vsp1_rwpf *rpf = entity_to_rwpf(entity);
  51
  52         vsp1_rpf_write(rpf, dl, VI6_RPF_SRCM_ADDR_Y,
  53                        rpf->mem.addr[0] + rpf->offsets[0]);
  54         vsp1_rpf_write(rpf, dl, VI6_RPF_SRCM_ADDR_C0,
  55                        rpf->mem.addr[1] + rpf->offsets[1]);
  56         vsp1_rpf_write(rpf, dl, VI6_RPF_SRCM_ADDR_C1,
  57                        rpf->mem.addr[2] + rpf->offsets[1]);
  58 }
  59
  60 static void rpf_configure(struct vsp1_entity *entity,
  61                           struct vsp1_pipeline *pipe,
  62                           struct vsp1_dl_list *dl)
  63 {
  64         struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
  65         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
  66         const struct v4l2_pix_format_mplane *format = &rpf->format;
  67         const struct v4l2_mbus_framefmt *source_format;
  68         const struct v4l2_mbus_framefmt *sink_format;
  69         const struct v4l2_rect *crop;
  70         unsigned int left = 0;
  71         unsigned int top = 0;
  72         u32 pstride;
  73         u32 infmt;
  74
  75         /* Source size, stride and crop offsets.
  76          *
  77          * The crop offsets correspond to the location of the crop rectangle top
  78          * left corner in the plane buffer. Only two offsets are needed, as
  79          * planes 2 and 3 always have identical strides.
  80          */
  81         crop = vsp1_rwpf_get_crop(rpf, rpf->entity.config);
  82
  83         vsp1_rpf_write(rpf, dl, VI6_RPF_SRC_BSIZE,
  84                        (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
  85                        (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
  86         vsp1_rpf_write(rpf, dl, VI6_RPF_SRC_ESIZE,
  87                        (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
  88                        (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
  89
  90         rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
  91                         + crop->left * fmtinfo->bpp[0] / 8;
  92         pstride = format->plane_fmt[0].bytesperline
  93                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
  94
  95         if (format->num_planes > 1) {
  96                 rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
  97                                 + crop->left * fmtinfo->bpp[1] / 8;
  98                 pstride |= format->plane_fmt[1].bytesperline
  99                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
 100         } else {
 101                 rpf->offsets[1] = 0;
 102         }
 103
 104         vsp1_rpf_write(rpf, dl, VI6_RPF_SRCM_PSTRIDE, pstride);
 105
 106         /* Format */
 107         sink_format = vsp1_entity_get_pad_format(&rpf->entity,
 108                                                  rpf->entity.config,
 109                                                  RWPF_PAD_SINK);
 110         source_format = vsp1_entity_get_pad_format(&rpf->entity,
 111                                                    rpf->entity.config,
 112                                                    RWPF_PAD_SOURCE);
 113
 114         infmt = VI6_RPF_INFMT_CIPM
 115               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
 116
 117         if (fmtinfo->swap_yc)
 118                 infmt |= VI6_RPF_INFMT_SPYCS;
 119         if (fmtinfo->swap_uv)
 120                 infmt |= VI6_RPF_INFMT_SPUVS;
 121
 122         if (sink_format->code != source_format->code)
 123                 infmt |= VI6_RPF_INFMT_CSC;
 124
 125         vsp1_rpf_write(rpf, dl, VI6_RPF_INFMT, infmt);
 126         vsp1_rpf_write(rpf, dl, VI6_RPF_DSWAP, fmtinfo->swap);
 127
 128         /* Output location */
 129         if (pipe->bru) {
 130                 const struct v4l2_rect *compose;
 131
 132                 compose = vsp1_entity_get_pad_compose(pipe->bru,
 133                                                       pipe->bru->config,
 134                                                       rpf->bru_input);
 135                 left = compose->left;
 136                 top = compose->top;
 137         }
 138
 139         vsp1_rpf_write(rpf, dl, VI6_RPF_LOC,
 140                        (left << VI6_RPF_LOC_HCOORD_SHIFT) |
 141                        (top << VI6_RPF_LOC_VCOORD_SHIFT));
 142
 143         /* Use the alpha channel (extended to 8 bits) when available or an
 144          * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 145          * otherwise. Disable color keying.
 146          */
 147         vsp1_rpf_write(rpf, dl, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 148                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 149                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 150
 151         vsp1_rpf_write(rpf, dl, VI6_RPF_VRTCOL_SET,
 152                        rpf->alpha << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 153
 154         vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, dl, rpf->alpha);
 155
 156         vsp1_rpf_write(rpf, dl, VI6_RPF_MSK_CTRL, 0);
 157         vsp1_rpf_write(rpf, dl, VI6_RPF_CKEY_CTRL, 0);
 158 }
 159
 160 static const struct vsp1_entity_operations rpf_entity_ops = {
 161         .set_memory = rpf_set_memory,
 162         .configure = rpf_configure,
 163 };
 164
 165 /* -----------------------------------------------------------------------------
 166  * Initialization and Cleanup
 167  */
 168
 169 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 170 {
 171         struct vsp1_rwpf *rpf;
 172         char name[6];
 173         int ret;
 174
 175         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 176         if (rpf == NULL)
 177                 return ERR_PTR(-ENOMEM);
 178
 179         rpf->max_width = RPF_MAX_WIDTH;
 180         rpf->max_height = RPF_MAX_HEIGHT;
 181
 182         rpf->entity.ops = &rpf_entity_ops;
 183         rpf->entity.type = VSP1_ENTITY_RPF;
 184         rpf->entity.index = index;
 185
 186         sprintf(name, "rpf.%u", index);
 187         ret = vsp1_entity_init(vsp1, &rpf->entity, name, 2, &rpf_ops);
 188         if (ret < 0)
 189                 return ERR_PTR(ret);
 190
 191         /* Initialize the control handler. */
 192         ret = vsp1_rwpf_init_ctrls(rpf);
 193         if (ret < 0) {
 194                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 195                         index);
 196                 goto error;
 197         }
 198
 199         return rpf;
 200
 201 error:
 202         vsp1_entity_destroy(&rpf->entity);
 203         return ERR_PTR(ret);
 204 }