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_dl.h"
  20 #include "vsp1_rwpf.h"
  21 #include "vsp1_video.h"
  22
  23 #define WPF_MAX_WIDTH                           2048
  24 #define WPF_MAX_HEIGHT                          2048
  25
  26 /* -----------------------------------------------------------------------------
  27  * Device Access
  28  */
  29
  30 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
  31 {
  32         vsp1_mod_write(&wpf->entity,
  33                        reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  34 }
  35
  36 /* -----------------------------------------------------------------------------
  37  * V4L2 Subdevice Core Operations
  38  */
  39
  40 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
  41 {
  42         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  43         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  44         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  45         const struct v4l2_mbus_framefmt *source_format;
  46         const struct v4l2_mbus_framefmt *sink_format;
  47         const struct v4l2_rect *crop = &wpf->crop;
  48         unsigned int i;
  49         u32 srcrpf = 0;
  50         u32 outfmt = 0;
  51
  52         if (!enable) {
  53                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  54                 vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
  55                            VI6_WPF_SRCRPF, 0);
  56                 return 0;
  57         }
  58
  59         /* Sources. If the pipeline has a single input and BRU is not used,
  60          * configure it as the master layer. Otherwise configure all
  61          * inputs as sub-layers and select the virtual RPF as the master
  62          * layer.
  63          */
  64         for (i = 0; i < vsp1->info->rpf_count; ++i) {
  65                 struct vsp1_rwpf *input = pipe->inputs[i];
  66
  67                 if (!input)
  68                         continue;
  69
  70                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
  71                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
  72                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
  73         }
  74
  75         if (pipe->bru || pipe->num_inputs > 1)
  76                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
  77
  78         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
  79
  80         /* Destination stride. */
  81         if (!pipe->lif) {
  82                 struct v4l2_pix_format_mplane *format = &wpf->format;
  83
  84                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
  85                                format->plane_fmt[0].bytesperline);
  86                 if (format->num_planes > 1)
  87                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
  88                                        format->plane_fmt[1].bytesperline);
  89         }
  90
  91         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
  92                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
  93                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
  94         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
  95                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
  96                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
  97
  98         /* Format */
  99         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 100                                                  wpf->entity.config,
 101                                                  RWPF_PAD_SINK);
 102         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 103                                                    wpf->entity.config,
 104                                                    RWPF_PAD_SOURCE);
 105
 106         if (!pipe->lif) {
 107                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 108
 109                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 110
 111                 if (fmtinfo->alpha)
 112                         outfmt |= VI6_WPF_OUTFMT_PXA;
 113                 if (fmtinfo->swap_yc)
 114                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 115                 if (fmtinfo->swap_uv)
 116                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 117
 118                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 119         }
 120
 121         if (sink_format->code != source_format->code)
 122                 outfmt |= VI6_WPF_OUTFMT_CSC;
 123
 124         outfmt |= wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT;
 125         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 126
 127         vsp1_mod_write(&wpf->entity, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 128                        VI6_DPR_WPF_FPORCH_FP_WPFN);
 129
 130         vsp1_mod_write(&wpf->entity, VI6_WPF_WRBCK_CTRL, 0);
 131
 132         /* Enable interrupts */
 133         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 134         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 135                    VI6_WFP_IRQ_ENB_FREE);
 136
 137         return 0;
 138 }
 139
 140 /* -----------------------------------------------------------------------------
 141  * V4L2 Subdevice Operations
 142  */
 143
 144 static struct v4l2_subdev_video_ops wpf_video_ops = {
 145         .s_stream = wpf_s_stream,
 146 };
 147
 148 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 149         .init_cfg = vsp1_entity_init_cfg,
 150         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 151         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 152         .get_fmt = vsp1_rwpf_get_format,
 153         .set_fmt = vsp1_rwpf_set_format,
 154         .get_selection = vsp1_rwpf_get_selection,
 155         .set_selection = vsp1_rwpf_set_selection,
 156 };
 157
 158 static struct v4l2_subdev_ops wpf_ops = {
 159         .video  = &wpf_video_ops,
 160         .pad    = &wpf_pad_ops,
 161 };
 162
 163 /* -----------------------------------------------------------------------------
 164  * VSP1 Entity Operations
 165  */
 166
 167 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
 168 {
 169         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 170
 171         vsp1_dlm_destroy(wpf->dlm);
 172 }
 173
 174 static void wpf_set_memory(struct vsp1_entity *entity)
 175 {
 176         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
 177
 178         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, wpf->mem.addr[0]);
 179         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, wpf->mem.addr[1]);
 180         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, wpf->mem.addr[2]);
 181 }
 182
 183 static const struct vsp1_entity_operations wpf_entity_ops = {
 184         .destroy = vsp1_wpf_destroy,
 185         .set_memory = wpf_set_memory,
 186 };
 187
 188 /* -----------------------------------------------------------------------------
 189  * Initialization and Cleanup
 190  */
 191
 192 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 193 {
 194         struct vsp1_rwpf *wpf;
 195         char name[6];
 196         int ret;
 197
 198         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 199         if (wpf == NULL)
 200                 return ERR_PTR(-ENOMEM);
 201
 202         wpf->max_width = WPF_MAX_WIDTH;
 203         wpf->max_height = WPF_MAX_HEIGHT;
 204
 205         wpf->entity.ops = &wpf_entity_ops;
 206         wpf->entity.type = VSP1_ENTITY_WPF;
 207         wpf->entity.index = index;
 208
 209         sprintf(name, "wpf.%u", index);
 210         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops);
 211         if (ret < 0)
 212                 return ERR_PTR(ret);
 213
 214         /* Initialize the display list manager. */
 215         wpf->dlm = vsp1_dlm_create(vsp1, index, 4);
 216         if (!wpf->dlm) {
 217                 ret = -ENOMEM;
 218                 goto error;
 219         }
 220
 221         /* Initialize the control handler. */
 222         ret = vsp1_rwpf_init_ctrls(wpf);
 223         if (ret < 0) {
 224                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 225                         index);
 226                 goto error;
 227         }
 228
 229         return wpf;
 230
 231 error:
 232         vsp1_entity_destroy(&wpf->entity);
 233         return ERR_PTR(ret);
 234 }