drivers/media/video/s5p-tv/mixer_vp_layer.c

   1 /*
   2  * Samsung TV Mixer driver
   3  *
   4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   5  *
   6  * Tomasz Stanislawski, <t.stanislaws@samsung.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
  10  * by the Free Software Foundiation. either version 2 of the License,
  11  * or (at your option) any later version
  12  */
  13
  14 #include "mixer.h"
  15
  16 #include "regs-vp.h"
  17
  18 #include <media/videobuf2-dma-contig.h>
  19
  20 /* FORMAT DEFINITIONS */
  21 static const struct mxr_format mxr_fmt_nv12 = {
  22         .name = "NV12",
  23         .fourcc = V4L2_PIX_FMT_NV12,
  24         .colorspace = V4L2_COLORSPACE_JPEG,
  25         .num_planes = 2,
  26         .plane = {
  27                 { .width = 1, .height = 1, .size = 1 },
  28                 { .width = 2, .height = 2, .size = 2 },
  29         },
  30         .num_subframes = 1,
  31         .cookie = VP_MODE_NV12 | VP_MODE_MEM_LINEAR,
  32 };
  33
  34 static const struct mxr_format mxr_fmt_nv21 = {
  35         .name = "NV21",
  36         .fourcc = V4L2_PIX_FMT_NV21,
  37         .colorspace = V4L2_COLORSPACE_JPEG,
  38         .num_planes = 2,
  39         .plane = {
  40                 { .width = 1, .height = 1, .size = 1 },
  41                 { .width = 2, .height = 2, .size = 2 },
  42         },
  43         .num_subframes = 1,
  44         .cookie = VP_MODE_NV21 | VP_MODE_MEM_LINEAR,
  45 };
  46
  47 static const struct mxr_format mxr_fmt_nv12m = {
  48         .name = "NV12 (mplane)",
  49         .fourcc = V4L2_PIX_FMT_NV12M,
  50         .colorspace = V4L2_COLORSPACE_JPEG,
  51         .num_planes = 2,
  52         .plane = {
  53                 { .width = 1, .height = 1, .size = 1 },
  54                 { .width = 2, .height = 2, .size = 2 },
  55         },
  56         .num_subframes = 2,
  57         .plane2subframe = {0, 1},
  58         .cookie = VP_MODE_NV12 | VP_MODE_MEM_LINEAR,
  59 };
  60
  61 static const struct mxr_format mxr_fmt_nv12mt = {
  62         .name = "NV12 tiled (mplane)",
  63         .fourcc = V4L2_PIX_FMT_NV12MT,
  64         .colorspace = V4L2_COLORSPACE_JPEG,
  65         .num_planes = 2,
  66         .plane = {
  67                 { .width = 128, .height = 32, .size = 4096 },
  68                 { .width = 128, .height = 32, .size = 2048 },
  69         },
  70         .num_subframes = 2,
  71         .plane2subframe = {0, 1},
  72         .cookie = VP_MODE_NV12 | VP_MODE_MEM_TILED,
  73 };
  74
  75 static const struct mxr_format *mxr_video_format[] = {
  76         &mxr_fmt_nv12,
  77         &mxr_fmt_nv21,
  78         &mxr_fmt_nv12m,
  79         &mxr_fmt_nv12mt,
  80 };
  81
  82 /* AUXILIARY CALLBACKS */
  83
  84 static void mxr_vp_layer_release(struct mxr_layer *layer)
  85 {
  86         mxr_base_layer_unregister(layer);
  87         mxr_base_layer_release(layer);
  88 }
  89
  90 static void mxr_vp_buffer_set(struct mxr_layer *layer,
  91         struct mxr_buffer *buf)
  92 {
  93         dma_addr_t luma_addr[2] = {0, 0};
  94         dma_addr_t chroma_addr[2] = {0, 0};
  95
  96         if (buf == NULL) {
  97                 mxr_reg_vp_buffer(layer->mdev, luma_addr, chroma_addr);
  98                 return;
  99         }
 100         luma_addr[0] = vb2_dma_contig_plane_paddr(&buf->vb, 0);
 101         if (layer->fmt->num_subframes == 2) {
 102                 chroma_addr[0] = vb2_dma_contig_plane_paddr(&buf->vb, 1);
 103         } else {
 104                 /* FIXME: mxr_get_plane_size compute integer division,
 105                  * which is slow and should not be performed in interrupt */
 106                 chroma_addr[0] = luma_addr[0] + mxr_get_plane_size(
 107                         &layer->fmt->plane[0], layer->geo.src.full_width,
 108                         layer->geo.src.full_height);
 109         }
 110         if (layer->fmt->cookie & VP_MODE_MEM_TILED) {
 111                 luma_addr[1] = luma_addr[0] + 0x40;
 112                 chroma_addr[1] = chroma_addr[0] + 0x40;
 113         } else {
 114                 luma_addr[1] = luma_addr[0] + layer->geo.src.full_width;
 115                 chroma_addr[1] = chroma_addr[0];
 116         }
 117         mxr_reg_vp_buffer(layer->mdev, luma_addr, chroma_addr);
 118 }
 119
 120 static void mxr_vp_stream_set(struct mxr_layer *layer, int en)
 121 {
 122         mxr_reg_vp_layer_stream(layer->mdev, en);
 123 }
 124
 125 static void mxr_vp_format_set(struct mxr_layer *layer)
 126 {
 127         mxr_reg_vp_format(layer->mdev, layer->fmt, &layer->geo);
 128 }
 129
 130 static void mxr_vp_fix_geometry(struct mxr_layer *layer)
 131 {
 132         struct mxr_geometry *geo = &layer->geo;
 133
 134         /* align horizontal size to 8 pixels */
 135         geo->src.full_width = ALIGN(geo->src.full_width, 8);
 136         /* limit to boundary size */
 137         geo->src.full_width = clamp_val(geo->src.full_width, 8, 8192);
 138         geo->src.full_height = clamp_val(geo->src.full_height, 1, 8192);
 139         geo->src.width = clamp_val(geo->src.width, 32, geo->src.full_width);
 140         geo->src.width = min(geo->src.width, 2047U);
 141         geo->src.height = clamp_val(geo->src.height, 4, geo->src.full_height);
 142         geo->src.height = min(geo->src.height, 2047U);
 143
 144         /* setting size of output window */
 145         geo->dst.width = clamp_val(geo->dst.width, 8, geo->dst.full_width);
 146         geo->dst.height = clamp_val(geo->dst.height, 1, geo->dst.full_height);
 147
 148         /* ensure that scaling is in range 1/4x to 16x */
 149         if (geo->src.width >= 4 * geo->dst.width)
 150                 geo->src.width = 4 * geo->dst.width;
 151         if (geo->dst.width >= 16 * geo->src.width)
 152                 geo->dst.width = 16 * geo->src.width;
 153         if (geo->src.height >= 4 * geo->dst.height)
 154                 geo->src.height = 4 * geo->dst.height;
 155         if (geo->dst.height >= 16 * geo->src.height)
 156                 geo->dst.height = 16 * geo->src.height;
 157
 158         /* setting scaling ratio */
 159         geo->x_ratio = (geo->src.width << 16) / geo->dst.width;
 160         geo->y_ratio = (geo->src.height << 16) / geo->dst.height;
 161
 162         /* adjust offsets */
 163         geo->src.x_offset = min(geo->src.x_offset,
 164                 geo->src.full_width - geo->src.width);
 165         geo->src.y_offset = min(geo->src.y_offset,
 166                 geo->src.full_height - geo->src.height);
 167         geo->dst.x_offset = min(geo->dst.x_offset,
 168                 geo->dst.full_width - geo->dst.width);
 169         geo->dst.y_offset = min(geo->dst.y_offset,
 170                 geo->dst.full_height - geo->dst.height);
 171 }
 172
 173 /* PUBLIC API */
 174
 175 struct mxr_layer *mxr_vp_layer_create(struct mxr_device *mdev, int idx)
 176 {
 177         struct mxr_layer *layer;
 178         int ret;
 179         struct mxr_layer_ops ops = {
 180                 .release = mxr_vp_layer_release,
 181                 .buffer_set = mxr_vp_buffer_set,
 182                 .stream_set = mxr_vp_stream_set,
 183                 .format_set = mxr_vp_format_set,
 184                 .fix_geometry = mxr_vp_fix_geometry,
 185         };
 186         char name[32];
 187
 188         sprintf(name, "video%d", idx);
 189
 190         layer = mxr_base_layer_create(mdev, idx, name, &ops);
 191         if (layer == NULL) {
 192                 mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
 193                 goto fail;
 194         }
 195
 196         layer->fmt_array = mxr_video_format;
 197         layer->fmt_array_size = ARRAY_SIZE(mxr_video_format);
 198
 199         ret = mxr_base_layer_register(layer);
 200         if (ret)
 201                 goto fail_layer;
 202
 203         return layer;
 204
 205 fail_layer:
 206         mxr_base_layer_release(layer);
 207
 208 fail:
 209         return NULL;
 210 }
 211