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_rwpf.h"
  20 #include "vsp1_video.h"
  21
  22 #define WPF_MAX_WIDTH                           2048
  23 #define WPF_MAX_HEIGHT                          2048
  24
  25 /* -----------------------------------------------------------------------------
  26  * Device Access
  27  */
  28
  29 static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
  30 {
  31         return vsp1_read(wpf->entity.vsp1,
  32                          reg + wpf->entity.index * VI6_WPF_OFFSET);
  33 }
  34
  35 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
  36 {
  37         vsp1_mod_write(&wpf->entity,
  38                        reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  39 }
  40
  41 /* -----------------------------------------------------------------------------
  42  * Controls
  43  */
  44
  45 static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
  46 {
  47         struct vsp1_rwpf *wpf =
  48                 container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
  49         u32 value;
  50
  51         if (!vsp1_entity_is_streaming(&wpf->entity))
  52                 return 0;
  53
  54         switch (ctrl->id) {
  55         case V4L2_CID_ALPHA_COMPONENT:
  56                 value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
  57                 value &= ~VI6_WPF_OUTFMT_PDV_MASK;
  58                 value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
  59                 vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
  60                 break;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
  67         .s_ctrl = wpf_s_ctrl,
  68 };
  69
  70 /* -----------------------------------------------------------------------------
  71  * V4L2 Subdevice Core Operations
  72  */
  73
  74 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
  75 {
  76         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
  77         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  78         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  79         const struct v4l2_rect *crop = &wpf->crop;
  80         unsigned int i;
  81         u32 srcrpf = 0;
  82         u32 outfmt = 0;
  83         int ret;
  84
  85         ret = vsp1_entity_set_streaming(&wpf->entity, enable);
  86         if (ret < 0)
  87                 return ret;
  88
  89         if (!enable) {
  90                 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  91                 vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
  92                            VI6_WPF_SRCRPF, 0);
  93                 return 0;
  94         }
  95
  96         /* Sources. If the pipeline has a single input and BRU is not used,
  97          * configure it as the master layer. Otherwise configure all
  98          * inputs as sub-layers and select the virtual RPF as the master
  99          * layer.
 100          */
 101         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 102                 struct vsp1_rwpf *input = pipe->inputs[i];
 103
 104                 if (!input)
 105                         continue;
 106
 107                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 108                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 109                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 110         }
 111
 112         if (pipe->bru || pipe->num_inputs > 1)
 113                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 114
 115         vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);
 116
 117         /* Destination stride. */
 118         if (!pipe->lif) {
 119                 struct v4l2_pix_format_mplane *format = &wpf->format;
 120
 121                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
 122                                format->plane_fmt[0].bytesperline);
 123                 if (format->num_planes > 1)
 124                         vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
 125                                        format->plane_fmt[1].bytesperline);
 126         }
 127
 128         vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 129                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 130                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 131         vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 132                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 133                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 134
 135         /* Format */
 136         if (!pipe->lif) {
 137                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 138
 139                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 140
 141                 if (fmtinfo->alpha)
 142                         outfmt |= VI6_WPF_OUTFMT_PXA;
 143                 if (fmtinfo->swap_yc)
 144                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 145                 if (fmtinfo->swap_uv)
 146                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 147
 148                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 149         }
 150
 151         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 152             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 153                 outfmt |= VI6_WPF_OUTFMT_CSC;
 154
 155         /* Take the control handler lock to ensure that the PDV value won't be
 156          * changed behind our back by a set control operation.
 157          */
 158         if (vsp1->info->uapi)
 159                 mutex_lock(wpf->ctrls.lock);
 160         outfmt |= wpf->alpha->cur.val << VI6_WPF_OUTFMT_PDV_SHIFT;
 161         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 162         if (vsp1->info->uapi)
 163                 mutex_unlock(wpf->ctrls.lock);
 164
 165         vsp1_mod_write(&wpf->entity, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 166                        VI6_DPR_WPF_FPORCH_FP_WPFN);
 167
 168         vsp1_mod_write(&wpf->entity, VI6_WPF_WRBCK_CTRL, 0);
 169
 170         /* Enable interrupts */
 171         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 172         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 173                    VI6_WFP_IRQ_ENB_FREE);
 174
 175         return 0;
 176 }
 177
 178 /* -----------------------------------------------------------------------------
 179  * V4L2 Subdevice Operations
 180  */
 181
 182 static struct v4l2_subdev_video_ops wpf_video_ops = {
 183         .s_stream = wpf_s_stream,
 184 };
 185
 186 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 187         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 188         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 189         .get_fmt = vsp1_rwpf_get_format,
 190         .set_fmt = vsp1_rwpf_set_format,
 191         .get_selection = vsp1_rwpf_get_selection,
 192         .set_selection = vsp1_rwpf_set_selection,
 193 };
 194
 195 static struct v4l2_subdev_ops wpf_ops = {
 196         .video  = &wpf_video_ops,
 197         .pad    = &wpf_pad_ops,
 198 };
 199
 200 /* -----------------------------------------------------------------------------
 201  * Video Device Operations
 202  */
 203
 204 static void wpf_set_memory(struct vsp1_rwpf *wpf, struct vsp1_rwpf_memory *mem)
 205 {
 206         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, mem->addr[0]);
 207         if (mem->num_planes > 1)
 208                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, mem->addr[1]);
 209         if (mem->num_planes > 2)
 210                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, mem->addr[2]);
 211 }
 212
 213 static const struct vsp1_rwpf_operations wpf_vdev_ops = {
 214         .set_memory = wpf_set_memory,
 215 };
 216
 217 /* -----------------------------------------------------------------------------
 218  * Initialization and Cleanup
 219  */
 220
 221 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 222 {
 223         struct v4l2_subdev *subdev;
 224         struct vsp1_rwpf *wpf;
 225         int ret;
 226
 227         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 228         if (wpf == NULL)
 229                 return ERR_PTR(-ENOMEM);
 230
 231         wpf->ops = &wpf_vdev_ops;
 232
 233         wpf->max_width = WPF_MAX_WIDTH;
 234         wpf->max_height = WPF_MAX_HEIGHT;
 235
 236         wpf->entity.type = VSP1_ENTITY_WPF;
 237         wpf->entity.index = index;
 238
 239         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 240         if (ret < 0)
 241                 return ERR_PTR(ret);
 242
 243         /* Initialize the V4L2 subdev. */
 244         subdev = &wpf->entity.subdev;
 245         v4l2_subdev_init(subdev, &wpf_ops);
 246
 247         subdev->entity.ops = &vsp1->media_ops;
 248         subdev->internal_ops = &vsp1_subdev_internal_ops;
 249         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 250                  dev_name(vsp1->dev), index);
 251         v4l2_set_subdevdata(subdev, wpf);
 252         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 253
 254         vsp1_entity_init_formats(subdev, NULL);
 255
 256         /* Initialize the control handler. */
 257         v4l2_ctrl_handler_init(&wpf->ctrls, 1);
 258         wpf->alpha = v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops,
 259                                        V4L2_CID_ALPHA_COMPONENT,
 260                                        0, 255, 1, 255);
 261
 262         wpf->entity.subdev.ctrl_handler = &wpf->ctrls;
 263
 264         if (wpf->ctrls.error) {
 265                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 266                         index);
 267                 ret = wpf->ctrls.error;
 268                 goto error;
 269         }
 270
 271         return wpf;
 272
 273 error:
 274         vsp1_entity_destroy(&wpf->entity);
 275         return ERR_PTR(ret);
 276 }