drivers/media/platform/coda/coda-gdi.c

   1 /*
   2  * Coda multi-standard codec IP
   3  *
   4  * Copyright (C) 2014 Philipp Zabel, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/bitops.h>
  13 #include "coda.h"
  14
  15 #define XY2_INVERT      BIT(7)
  16 #define XY2_ZERO        BIT(6)
  17 #define XY2_TB_XOR      BIT(5)
  18 #define XY2_XYSEL       BIT(4)
  19 #define XY2_Y           (1 << 4)
  20 #define XY2_X           (0 << 4)
  21
  22 #define XY2(luma_sel, luma_bit, chroma_sel, chroma_bit) \
  23         (((XY2_##luma_sel) | (luma_bit)) << 8 | \
  24          (XY2_##chroma_sel) | (chroma_bit))
  25
  26 static const u16 xy2ca_zero_map[16] = {
  27         XY2(ZERO, 0, ZERO, 0),
  28         XY2(ZERO, 0, ZERO, 0),
  29         XY2(ZERO, 0, ZERO, 0),
  30         XY2(ZERO, 0, ZERO, 0),
  31         XY2(ZERO, 0, ZERO, 0),
  32         XY2(ZERO, 0, ZERO, 0),
  33         XY2(ZERO, 0, ZERO, 0),
  34         XY2(ZERO, 0, ZERO, 0),
  35         XY2(ZERO, 0, ZERO, 0),
  36         XY2(ZERO, 0, ZERO, 0),
  37         XY2(ZERO, 0, ZERO, 0),
  38         XY2(ZERO, 0, ZERO, 0),
  39         XY2(ZERO, 0, ZERO, 0),
  40         XY2(ZERO, 0, ZERO, 0),
  41         XY2(ZERO, 0, ZERO, 0),
  42         XY2(ZERO, 0, ZERO, 0),
  43 };
  44
  45 static const u16 xy2ca_tiled_map[16] = {
  46         XY2(Y,    0, Y,    0),
  47         XY2(Y,    1, Y,    1),
  48         XY2(Y,    2, Y,    2),
  49         XY2(Y,    3, X,    3),
  50         XY2(X,    3, ZERO, 0),
  51         XY2(ZERO, 0, ZERO, 0),
  52         XY2(ZERO, 0, ZERO, 0),
  53         XY2(ZERO, 0, ZERO, 0),
  54         XY2(ZERO, 0, ZERO, 0),
  55         XY2(ZERO, 0, ZERO, 0),
  56         XY2(ZERO, 0, ZERO, 0),
  57         XY2(ZERO, 0, ZERO, 0),
  58         XY2(ZERO, 0, ZERO, 0),
  59         XY2(ZERO, 0, ZERO, 0),
  60         XY2(ZERO, 0, ZERO, 0),
  61         XY2(ZERO, 0, ZERO, 0),
  62 };
  63
  64 /*
  65  * RA[15:0], CA[15:8] are hardwired to contain the 24-bit macroblock
  66  * start offset (macroblock size is 16x16 for luma, 16x8 for chroma).
  67  * Bits CA[4:0] are set using XY2CA above. BA[3:0] seems to be unused.
  68  */
  69
  70 #define RBC_CA          (0 << 4)
  71 #define RBC_BA          (1 << 4)
  72 #define RBC_RA          (2 << 4)
  73 #define RBC_ZERO        (3 << 4)
  74
  75 #define RBC(luma_sel, luma_bit, chroma_sel, chroma_bit) \
  76         (((RBC_##luma_sel) | (luma_bit)) << 6 | \
  77          (RBC_##chroma_sel) | (chroma_bit))
  78
  79 static const u16 rbc2axi_tiled_map[32] = {
  80         RBC(ZERO, 0, ZERO, 0),
  81         RBC(ZERO, 0, ZERO, 0),
  82         RBC(ZERO, 0, ZERO, 0),
  83         RBC(CA,   0, CA,   0),
  84         RBC(CA,   1, CA,   1),
  85         RBC(CA,   2, CA,   2),
  86         RBC(CA,   3, CA,   3),
  87         RBC(CA,   4, CA,   8),
  88         RBC(CA,   8, CA,   9),
  89         RBC(CA,   9, CA,  10),
  90         RBC(CA,  10, CA,  11),
  91         RBC(CA,  11, CA,  12),
  92         RBC(CA,  12, CA,  13),
  93         RBC(CA,  13, CA,  14),
  94         RBC(CA,  14, CA,  15),
  95         RBC(CA,  15, RA,   0),
  96         RBC(RA,   0, RA,   1),
  97         RBC(RA,   1, RA,   2),
  98         RBC(RA,   2, RA,   3),
  99         RBC(RA,   3, RA,   4),
 100         RBC(RA,   4, RA,   5),
 101         RBC(RA,   5, RA,   6),
 102         RBC(RA,   6, RA,   7),
 103         RBC(RA,   7, RA,   8),
 104         RBC(RA,   8, RA,   9),
 105         RBC(RA,   9, RA,  10),
 106         RBC(RA,  10, RA,  11),
 107         RBC(RA,  11, RA,  12),
 108         RBC(RA,  12, RA,  13),
 109         RBC(RA,  13, RA,  14),
 110         RBC(RA,  14, RA,  15),
 111         RBC(RA,  15, ZERO, 0),
 112 };
 113
 114 void coda_set_gdi_regs(struct coda_ctx *ctx)
 115 {
 116         struct coda_dev *dev = ctx->dev;
 117         const u16 *xy2ca_map;
 118         u32 xy2rbc_config;
 119         int i;
 120
 121         switch (ctx->tiled_map_type) {
 122         case GDI_LINEAR_FRAME_MAP:
 123         default:
 124                 xy2ca_map = xy2ca_zero_map;
 125                 xy2rbc_config = 0;
 126                 break;
 127         case GDI_TILED_FRAME_MB_RASTER_MAP:
 128                 xy2ca_map = xy2ca_tiled_map;
 129                 xy2rbc_config = CODA9_XY2RBC_TILED_MAP |
 130                                 CODA9_XY2RBC_CA_INC_HOR |
 131                                 (16 - 1) << 12 | (8 - 1) << 4;
 132                 break;
 133         }
 134
 135         for (i = 0; i < 16; i++)
 136                 coda_write(dev, xy2ca_map[i],
 137                                 CODA9_GDI_XY2_CAS_0 + 4 * i);
 138         for (i = 0; i < 4; i++)
 139                 coda_write(dev, XY2(ZERO, 0, ZERO, 0),
 140                                 CODA9_GDI_XY2_BA_0 + 4 * i);
 141         for (i = 0; i < 16; i++)
 142                 coda_write(dev, XY2(ZERO, 0, ZERO, 0),
 143                                 CODA9_GDI_XY2_RAS_0 + 4 * i);
 144         coda_write(dev, xy2rbc_config, CODA9_GDI_XY2_RBC_CONFIG);
 145         if (xy2rbc_config) {
 146                 for (i = 0; i < 32; i++)
 147                         coda_write(dev, rbc2axi_tiled_map[i],
 148                                         CODA9_GDI_RBC2_AXI_0 + 4 * i);
 149         }
 150 }