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_pipe.h"
  21 #include "vsp1_rwpf.h"
  22 #include "vsp1_video.h"
  23
  24 #define WPF_GEN2_MAX_WIDTH                      2048U
  25 #define WPF_GEN2_MAX_HEIGHT                     2048U
  26 #define WPF_GEN3_MAX_WIDTH                      8190U
  27 #define WPF_GEN3_MAX_HEIGHT                     8190U
  28
  29 /* -----------------------------------------------------------------------------
  30  * Device Access
  31  */
  32
  33 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf,
  34                                   struct vsp1_dl_list *dl, u32 reg, u32 data)
  35 {
  36         vsp1_dl_list_write(dl, reg + wpf->entity.index * VI6_WPF_OFFSET, data);
  37 }
  38
  39 /* -----------------------------------------------------------------------------
  40  * V4L2 Subdevice Core Operations
  41  */
  42
  43 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
  44 {
  45         struct vsp1_rwpf *wpf = to_rwpf(subdev);
  46         struct vsp1_device *vsp1 = wpf->entity.vsp1;
  47
  48         if (enable)
  49                 return 0;
  50
  51         /* Write to registers directly when stopping the stream as there will be
  52          * no pipeline run to apply the display list.
  53          */
  54         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
  55         vsp1_write(vsp1, wpf->entity.index * VI6_WPF_OFFSET +
  56                    VI6_WPF_SRCRPF, 0);
  57
  58         return 0;
  59 }
  60
  61 /* -----------------------------------------------------------------------------
  62  * V4L2 Subdevice Operations
  63  */
  64
  65 static const struct v4l2_subdev_video_ops wpf_video_ops = {
  66         .s_stream = wpf_s_stream,
  67 };
  68
  69 static const struct v4l2_subdev_ops wpf_ops = {
  70         .video  = &wpf_video_ops,
  71         .pad    = &vsp1_rwpf_pad_ops,
  72 };
  73
  74 /* -----------------------------------------------------------------------------
  75  * VSP1 Entity Operations
  76  */
  77
  78 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
  79 {
  80         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
  81
  82         vsp1_dlm_destroy(wpf->dlm);
  83 }
  84
  85 static void wpf_set_memory(struct vsp1_entity *entity, struct vsp1_dl_list *dl)
  86 {
  87         struct vsp1_rwpf *wpf = entity_to_rwpf(entity);
  88
  89         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_Y, wpf->mem.addr[0]);
  90         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C0, wpf->mem.addr[1]);
  91         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_ADDR_C1, wpf->mem.addr[2]);
  92 }
  93
  94 static void wpf_configure(struct vsp1_entity *entity,
  95                           struct vsp1_pipeline *pipe,
  96                           struct vsp1_dl_list *dl, bool full)
  97 {
  98         struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
  99         struct vsp1_device *vsp1 = wpf->entity.vsp1;
 100         const struct v4l2_mbus_framefmt *source_format;
 101         const struct v4l2_mbus_framefmt *sink_format;
 102         const struct v4l2_rect *crop;
 103         unsigned int i;
 104         u32 outfmt = 0;
 105         u32 srcrpf = 0;
 106
 107         if (!full)
 108                 return;
 109
 110         /* Cropping */
 111         crop = vsp1_rwpf_get_crop(wpf, wpf->entity.config);
 112
 113         vsp1_wpf_write(wpf, dl, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 114                        (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 115                        (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 116         vsp1_wpf_write(wpf, dl, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 117                        (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 118                        (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));
 119
 120         /* Format */
 121         sink_format = vsp1_entity_get_pad_format(&wpf->entity,
 122                                                  wpf->entity.config,
 123                                                  RWPF_PAD_SINK);
 124         source_format = vsp1_entity_get_pad_format(&wpf->entity,
 125                                                    wpf->entity.config,
 126                                                    RWPF_PAD_SOURCE);
 127
 128         if (!pipe->lif) {
 129                 const struct v4l2_pix_format_mplane *format = &wpf->format;
 130                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 131
 132                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 133
 134                 if (fmtinfo->alpha)
 135                         outfmt |= VI6_WPF_OUTFMT_PXA;
 136                 if (fmtinfo->swap_yc)
 137                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 138                 if (fmtinfo->swap_uv)
 139                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 140
 141                 /* Destination stride and byte swapping. */
 142                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_Y,
 143                                format->plane_fmt[0].bytesperline);
 144                 if (format->num_planes > 1)
 145                         vsp1_wpf_write(wpf, dl, VI6_WPF_DSTM_STRIDE_C,
 146                                        format->plane_fmt[1].bytesperline);
 147
 148                 vsp1_wpf_write(wpf, dl, VI6_WPF_DSWAP, fmtinfo->swap);
 149         }
 150
 151         if (sink_format->code != source_format->code)
 152                 outfmt |= VI6_WPF_OUTFMT_CSC;
 153
 154         outfmt |= wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT;
 155         vsp1_wpf_write(wpf, dl, VI6_WPF_OUTFMT, outfmt);
 156
 157         vsp1_dl_list_write(dl, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 158                            VI6_DPR_WPF_FPORCH_FP_WPFN);
 159
 160         vsp1_dl_list_write(dl, VI6_WPF_WRBCK_CTRL, 0);
 161
 162         /* Sources. If the pipeline has a single input and BRU is not used,
 163          * configure it as the master layer. Otherwise configure all
 164          * inputs as sub-layers and select the virtual RPF as the master
 165          * layer.
 166          */
 167         for (i = 0; i < vsp1->info->rpf_count; ++i) {
 168                 struct vsp1_rwpf *input = pipe->inputs[i];
 169
 170                 if (!input)
 171                         continue;
 172
 173                 srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 174                         ? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 175                         : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 176         }
 177
 178         if (pipe->bru || pipe->num_inputs > 1)
 179                 srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;
 180
 181         vsp1_wpf_write(wpf, dl, VI6_WPF_SRCRPF, srcrpf);
 182
 183         /* Enable interrupts */
 184         vsp1_dl_list_write(dl, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 185         vsp1_dl_list_write(dl, VI6_WPF_IRQ_ENB(wpf->entity.index),
 186                            VI6_WFP_IRQ_ENB_FREE);
 187 }
 188
 189 static const struct vsp1_entity_operations wpf_entity_ops = {
 190         .destroy = vsp1_wpf_destroy,
 191         .set_memory = wpf_set_memory,
 192         .configure = wpf_configure,
 193 };
 194
 195 /* -----------------------------------------------------------------------------
 196  * Initialization and Cleanup
 197  */
 198
 199 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 200 {
 201         struct vsp1_rwpf *wpf;
 202         char name[6];
 203         int ret;
 204
 205         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 206         if (wpf == NULL)
 207                 return ERR_PTR(-ENOMEM);
 208
 209         if (vsp1->info->gen == 2) {
 210                 wpf->max_width = WPF_GEN2_MAX_WIDTH;
 211                 wpf->max_height = WPF_GEN2_MAX_HEIGHT;
 212         } else {
 213                 wpf->max_width = WPF_GEN3_MAX_WIDTH;
 214                 wpf->max_height = WPF_GEN3_MAX_HEIGHT;
 215         }
 216
 217         wpf->entity.ops = &wpf_entity_ops;
 218         wpf->entity.type = VSP1_ENTITY_WPF;
 219         wpf->entity.index = index;
 220
 221         sprintf(name, "wpf.%u", index);
 222         ret = vsp1_entity_init(vsp1, &wpf->entity, name, 2, &wpf_ops,
 223                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 224         if (ret < 0)
 225                 return ERR_PTR(ret);
 226
 227         /* Initialize the display list manager. */
 228         wpf->dlm = vsp1_dlm_create(vsp1, index, 4);
 229         if (!wpf->dlm) {
 230                 ret = -ENOMEM;
 231                 goto error;
 232         }
 233
 234         /* Initialize the control handler. */
 235         ret = vsp1_rwpf_init_ctrls(wpf);
 236         if (ret < 0) {
 237                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 238                         index);
 239                 goto error;
 240         }
 241
 242         return wpf;
 243
 244 error:
 245         vsp1_entity_destroy(&wpf->entity);
 246         return ERR_PTR(ret);
 247 }