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,
  31                                   struct vsp1_dl_list *dl, u32 reg, u32 data)
  32 {
  33         vsp1_dl_list_write(dl, 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_rwpf *wpf = to_rwpf(subdev);
  43         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  44
  45         if (enable)
  46                 return 0;
  47
  48         /* Write to registers directly when stopping the stream as there will be
  49          * no pipeline run to apply the display list.
  50          */
  51         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  52         vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
  53                    VI6_WPF_SRCRPF, 0);
  54
  55         return 0;
  56 }
  57
  58 /* -----------------------------------------------------------------------------
  59  * V4L2 Subdevice Operations
  60  */
  61
  62 static struct v4l2_subdev_video_ops wpf_video_ops = {
  63         .s_stream = wpf_s_stream,
  64 };
  65
  66 static struct v4l2_subdev_ops wpf_ops = {
  67         .video  = &wpf_video_ops,
  68         .pad    = &vsp1_rwpf_pad_ops,
  69 };
  70
  71 /* -----------------------------------------------------------------------------
  72  * VSP1 Entity Operations
  73  */
  74
  75 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
  76 {
  77         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
  78
  79         vsp1_dlm_destroy(wpf->dlm);
  80 }
  81
  82 static void wpf_set_memory(struct vsp1_entity *entity, struct vsp1_dl_list *dl)
  83 {
  84         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
  85
  86         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_Y, wpf->mem.addr[0]);
  87         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C0, wpf->mem.addr[1]);
  88         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C1, wpf->mem.addr[2]);
  89 }
  90
  91 static void wpf_configure(struct vsp1_entity *entity, struct vsp1_dl_list *dl)
  92 {
  93         struct vsp1_pipeline *pipe = to_vsp1_pipeline(&entity->subdev.entity);
  94         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
  95         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  96         const struct v4l2_mbus_framefmt *source_format;
  97         const struct v4l2_mbus_framefmt *sink_format;
  98         const struct v4l2_rect *crop;
  99         unsigned int i;
 100         u32 outfmt = 0;
 101         u32 srcrpf = 0;
 102
 103         /* Cropping */
 104         crop = vsp1_rwpf_get_crop(wpf, wpf->entity.config);
 105
 106         vsp1_wpf_write(wpf, dl, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 107                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 108                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 109         vsp1_wpf_write(wpf, dl, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 110                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 111                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 112
 113         /* Format */
 114         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 115                                                  wpf->entity.config,
 116                                                  RWPF_PAD_SINK);
 117         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 118                                                    wpf->entity.config,
 119                                                    RWPF_PAD_SOURCE);
 120
 121         if (!pipe->lif) {
 122                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 123                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 124
 125                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 126
 127                 if (fmtinfo->alpha)
 128                         outfmt |= VI6_WPF_OUTFMT_PXA;
 129                 if (fmtinfo->swap_yc)
 130                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 131                 if (fmtinfo->swap_uv)
 132                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 133
 134                 /* Destination stride and byte swapping. */
 135                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_Y,
 136                                format->plane_fmt[0].bytesperline);
 137                 if (format->num_planes > 1)
 138                         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_C,
 139                                        format->plane_fmt[1].bytesperline);
 140
 141                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSWAP, fmtinfo->swap);
 142         }
 143
 144         if (sink_format->code != source_format->code)
 145                 outfmt |= VI6_WPF_OUTFMT_CSC;
 146
 147         outfmt |= wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT;
 148         vsp1_wpf_write(wpf, dl, VI6_WPF_OUTFMT, outfmt);
 149
 150         vsp1_dl_list_write(dl, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 151                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 152
 153         vsp1_dl_list_write(dl, VI6_WPF_WRBCK_CTRL, 0);
 154
 155         /* Sources. If the pipeline has a single input and BRU is not used,
 156          * configure it as the master layer. Otherwise configure all
 157          * inputs as sub-layers and select the virtual RPF as the master
 158          * layer.
 159          */
 160         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 161                 struct vsp1_rwpf *input = pipe->inputs[i];
 162
 163                 if (!input)
 164                         continue;
 165
 166                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 167                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 168                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 169         }
 170
 171         if (pipe->bru || pipe->num_inputs > 1)
 172                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 173
 174         vsp1_wpf_write(wpf, dl, VI6_WPF_SRCRPF, srcrpf);
 175
 176         /* Enable interrupts */
 177         vsp1_dl_list_write(dl, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 178         vsp1_dl_list_write(dl, VI6_WPF_IRQ_ENB(wpf->entity.index),
 179                            VI6_WFP_IRQ_ENB_FREE);
 180 }
 181
 182 static const struct vsp1_entity_operations wpf_entity_ops = {
 183         .destroy = vsp1_wpf_destroy,
 184         .set_memory = wpf_set_memory,
 185         .configure = wpf_configure,
 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 }