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_rect *crop = &wpf->crop;
  46         unsigned int i;
  47         u32 srcrpf = 0;
  48         u32 outfmt = 0;
  49
  50         vsp1_entity_set_streaming(&wpf->entity, enable);
  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         if (!pipe->lif) {
 100                 const struct vsp1_format_info *fmtinfo = wpf->fmtinfo;
 101
 102                 outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;
 103
 104                 if (fmtinfo->alpha)
 105                         outfmt |= VI6_WPF_OUTFMT_PXA;
 106                 if (fmtinfo->swap_yc)
 107                         outfmt |= VI6_WPF_OUTFMT_SPYCS;
 108                 if (fmtinfo->swap_uv)
 109                         outfmt |= VI6_WPF_OUTFMT_SPUVS;
 110
 111                 vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 112         }
 113
 114         if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 115             wpf->entity.formats[RWPF_PAD_SOURCE].code)
 116                 outfmt |= VI6_WPF_OUTFMT_CSC;
 117
 118         outfmt |= wpf->alpha << VI6_WPF_OUTFMT_PDV_SHIFT;
 119         vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 120
 121         vsp1_mod_write(&wpf->entity, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 122                        VI6_DPR_WPF_FPORCH_FP_WPFN);
 123
 124         vsp1_mod_write(&wpf->entity, VI6_WPF_WRBCK_CTRL, 0);
 125
 126         /* Enable interrupts */
 127         vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 128         vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 129                    VI6_WFP_IRQ_ENB_FREE);
 130
 131         return 0;
 132 }
 133
 134 /* -----------------------------------------------------------------------------
 135  * V4L2 Subdevice Operations
 136  */
 137
 138 static struct v4l2_subdev_video_ops wpf_video_ops = {
 139         .s_stream = wpf_s_stream,
 140 };
 141
 142 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 143         .enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 144         .enum_frame_size = vsp1_rwpf_enum_frame_size,
 145         .get_fmt = vsp1_rwpf_get_format,
 146         .set_fmt = vsp1_rwpf_set_format,
 147         .get_selection = vsp1_rwpf_get_selection,
 148         .set_selection = vsp1_rwpf_set_selection,
 149 };
 150
 151 static struct v4l2_subdev_ops wpf_ops = {
 152         .video  = &wpf_video_ops,
 153         .pad    = &wpf_pad_ops,
 154 };
 155
 156 /* -----------------------------------------------------------------------------
 157  * Video Device Operations
 158  */
 159
 160 static void wpf_set_memory(struct vsp1_rwpf *wpf, struct vsp1_rwpf_memory *mem)
 161 {
 162         vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, mem->addr[0]);
 163         if (mem->num_planes > 1)
 164                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, mem->addr[1]);
 165         if (mem->num_planes > 2)
 166                 vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, mem->addr[2]);
 167 }
 168
 169 static const struct vsp1_rwpf_operations wpf_vdev_ops = {
 170         .set_memory = wpf_set_memory,
 171 };
 172
 173 /* -----------------------------------------------------------------------------
 174  * Initialization and Cleanup
 175  */
 176
 177 static void vsp1_wpf_destroy(struct vsp1_entity *entity)
 178 {
 179         struct vsp1_rwpf *wpf = container_of(entity, struct vsp1_rwpf, entity);
 180
 181         vsp1_dlm_destroy(wpf->dlm);
 182 }
 183
 184 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 185 {
 186         struct v4l2_subdev *subdev;
 187         struct vsp1_rwpf *wpf;
 188         int ret;
 189
 190         wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 191         if (wpf == NULL)
 192                 return ERR_PTR(-ENOMEM);
 193
 194         wpf->ops = &wpf_vdev_ops;
 195
 196         wpf->max_width = WPF_MAX_WIDTH;
 197         wpf->max_height = WPF_MAX_HEIGHT;
 198
 199         wpf->entity.destroy = vsp1_wpf_destroy;
 200         wpf->entity.type = VSP1_ENTITY_WPF;
 201         wpf->entity.index = index;
 202
 203         ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 204         if (ret < 0)
 205                 return ERR_PTR(ret);
 206
 207         /* Initialize the display list manager if the WPF is used for display */
 208         if ((vsp1->info->features & VSP1_HAS_LIF) && index == 0) {
 209                 wpf->dlm = vsp1_dlm_create(vsp1, 4);
 210                 if (!wpf->dlm) {
 211                         ret = -ENOMEM;
 212                         goto error;
 213                 }
 214         }
 215
 216         /* Initialize the V4L2 subdev. */
 217         subdev = &wpf->entity.subdev;
 218         v4l2_subdev_init(subdev, &wpf_ops);
 219
 220         subdev->entity.ops = &vsp1->media_ops;
 221         subdev->internal_ops = &vsp1_subdev_internal_ops;
 222         snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 223                  dev_name(vsp1->dev), index);
 224         v4l2_set_subdevdata(subdev, wpf);
 225         subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 226
 227         vsp1_entity_init_formats(subdev, NULL);
 228
 229         /* Initialize the control handler. */
 230         ret = vsp1_rwpf_init_ctrls(wpf);
 231         if (ret < 0) {
 232                 dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 233                         index);
 234                 goto error;
 235         }
 236
 237         return wpf;
 238
 239 error:
 240         vsp1_entity_destroy(&wpf->entity);
 241         return ERR_PTR(ret);
 242 }