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_dma_addr(&buf->vb, 0);
 101         if (layer->fmt->num_subframes == 2) {
 102                 chroma_addr[0] = vb2_dma_contig_plane_dma_addr(&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 inline unsigned int do_center(unsigned int center,
 131         unsigned int size, unsigned int upper, unsigned int flags)
 132 {
 133         unsigned int lower;
 134
 135         if (flags & MXR_NO_OFFSET)
 136                 return 0;
 137
 138         lower = center - min(center, size / 2);
 139         return min(lower, upper - size);
 140 }
 141
 142 static void mxr_vp_fix_geometry(struct mxr_layer *layer,
 143         enum mxr_geometry_stage stage, unsigned long flags)
 144 {
 145         struct mxr_geometry *geo = &layer->geo;
 146         struct mxr_crop *src = &geo->src;
 147         struct mxr_crop *dst = &geo->dst;
 148         unsigned long x_center, y_center;
 149
 150         switch (stage) {
 151
 152         case MXR_GEOMETRY_SINK: /* nothing to be fixed here */
 153         case MXR_GEOMETRY_COMPOSE:
 154                 /* remember center of the area */
 155                 x_center = dst->x_offset + dst->width / 2;
 156                 y_center = dst->y_offset + dst->height / 2;
 157
 158                 /* ensure that compose is reachable using 16x scaling */
 159                 dst->width = clamp(dst->width, 8U, 16 * src->full_width);
 160                 dst->height = clamp(dst->height, 1U, 16 * src->full_height);
 161
 162                 /* setup offsets */
 163                 dst->x_offset = do_center(x_center, dst->width,
 164                         dst->full_width, flags);
 165                 dst->y_offset = do_center(y_center, dst->height,
 166                         dst->full_height, flags);
 167                 flags = 0; /* remove possible MXR_NO_OFFSET flag */
 168                 /* fall through */
 169         case MXR_GEOMETRY_CROP:
 170                 /* remember center of the area */
 171                 x_center = src->x_offset + src->width / 2;
 172                 y_center = src->y_offset + src->height / 2;
 173
 174                 /* ensure scaling is between 0.25x .. 16x */
 175                 src->width = clamp(src->width, round_up(dst->width / 16, 4),
 176                         dst->width * 4);
 177                 src->height = clamp(src->height, round_up(dst->height / 16, 4),
 178                         dst->height * 4);
 179
 180                 /* hardware limits */
 181                 src->width = clamp(src->width, 32U, 2047U);
 182                 src->height = clamp(src->height, 4U, 2047U);
 183
 184                 /* setup offsets */
 185                 src->x_offset = do_center(x_center, src->width,
 186                         src->full_width, flags);
 187                 src->y_offset = do_center(y_center, src->height,
 188                         src->full_height, flags);
 189
 190                 /* setting scaling ratio */
 191                 geo->x_ratio = (src->width << 16) / dst->width;
 192                 geo->y_ratio = (src->height << 16) / dst->height;
 193                 /* fall through */
 194
 195         case MXR_GEOMETRY_SOURCE:
 196                 src->full_width = clamp(src->full_width,
 197                         ALIGN(src->width + src->x_offset, 8), 8192U);
 198                 src->full_height = clamp(src->full_height,
 199                         src->height + src->y_offset, 8192U);
 200         };
 201 }
 202
 203 /* PUBLIC API */
 204
 205 struct mxr_layer *mxr_vp_layer_create(struct mxr_device *mdev, int idx)
 206 {
 207         struct mxr_layer *layer;
 208         int ret;
 209         struct mxr_layer_ops ops = {
 210                 .release = mxr_vp_layer_release,
 211                 .buffer_set = mxr_vp_buffer_set,
 212                 .stream_set = mxr_vp_stream_set,
 213                 .format_set = mxr_vp_format_set,
 214                 .fix_geometry = mxr_vp_fix_geometry,
 215         };
 216         char name[32];
 217
 218         sprintf(name, "video%d", idx);
 219
 220         layer = mxr_base_layer_create(mdev, idx, name, &ops);
 221         if (layer == NULL) {
 222                 mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
 223                 goto fail;
 224         }
 225
 226         layer->fmt_array = mxr_video_format;
 227         layer->fmt_array_size = ARRAY_SIZE(mxr_video_format);
 228
 229         ret = mxr_base_layer_register(layer);
 230         if (ret)
 231                 goto fail_layer;
 232
 233         return layer;
 234
 235 fail_layer:
 236         mxr_base_layer_release(layer);
 237
 238 fail:
 239         return NULL;
 240 }
 241