drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c

   1 /*
   2  * Copyright 2018 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22 #include "wndw.h"
  23 #include "atom.h"
  24
  25 #include <drm/drm_atomic_helper.h>
  26 #include <drm/drm_plane_helper.h>
  27 #include <nouveau_bo.h>
  28
  29 #include <nvif/clc37e.h>
  30
  31 static void
  32 wndwc57e_ilut_clr(struct nv50_wndw *wndw)
  33 {
  34         u32 *push;
  35         if ((push = evo_wait(&wndw->wndw, 2))) {
  36                 evo_mthd(push, 0x0444, 1);
  37                 evo_data(push, 0x00000000);
  38                 evo_kick(push, &wndw->wndw);
  39         }
  40 }
  41
  42 static void
  43 wndwc57e_ilut_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
  44 {
  45         u32 *push;
  46         if ((push = evo_wait(&wndw->wndw, 4))) {
  47                 evo_mthd(push, 0x0440, 3);
  48                 evo_data(push, asyw->xlut.i.size << 8 |
  49                                asyw->xlut.i.mode << 2 |
  50                                asyw->xlut.i.output_mode);
  51                 evo_data(push, asyw->xlut.handle);
  52                 evo_data(push, asyw->xlut.i.offset >> 8);
  53                 evo_kick(push, &wndw->wndw);
  54         }
  55 }
  56
  57 static u16
  58 fixedU0_16_FP16(u16 fixed)
  59 {
  60         int sign = 0, exp = 0, man = 0;
  61         if (fixed) {
  62                 while (--exp && !(fixed & 0x8000))
  63                         fixed <<= 1;
  64                 man = ((fixed << 1) & 0xffc0) >> 6;
  65                 exp += 15;
  66         }
  67         return (sign << 15) | (exp << 10) | man;
  68 }
  69
  70 static void
  71 wndwc57e_ilut_load(struct drm_color_lut *in, int size, void __iomem *mem)
  72 {
  73         memset_io(mem, 0x00, 0x20); /* VSS header. */
  74         mem += 0x20;
  75
  76         for (; size--; in++, mem += 0x08) {
  77                 u16 r = fixedU0_16_FP16(drm_color_lut_extract(in->  red, 16));
  78                 u16 g = fixedU0_16_FP16(drm_color_lut_extract(in->green, 16));
  79                 u16 b = fixedU0_16_FP16(drm_color_lut_extract(in-> blue, 16));
  80                 writew(r, mem + 0);
  81                 writew(g, mem + 2);
  82                 writew(b, mem + 4);
  83         }
  84
  85         /* INTERPOLATE modes require a "next" entry to interpolate with,
  86          * so we replicate the last entry to deal with this for now.
  87          */
  88         writew(readw(mem - 8), mem + 0);
  89         writew(readw(mem - 6), mem + 2);
  90         writew(readw(mem - 4), mem + 4);
  91 }
  92
  93 static void
  94 wndwc57e_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
  95 {
  96         u16 size = asyw->ilut->length / sizeof(struct drm_color_lut);
  97         if (size == 256) {
  98                 asyw->xlut.i.mode = 1; /* DIRECT8. */
  99         } else {
 100                 asyw->xlut.i.mode = 2; /* DIRECT10. */
 101                 size = 1024;
 102         }
 103         asyw->xlut.i.size = 4 /* VSS header. */ + size + 1 /* Entries. */;
 104         asyw->xlut.i.output_mode = 0; /* INTERPOLATE_DISABLE. */
 105         asyw->xlut.i.load = wndwc57e_ilut_load;
 106 }
 107
 108 static const struct nv50_wndw_func
 109 wndwc57e = {
 110         .acquire = wndwc37e_acquire,
 111         .release = wndwc37e_release,
 112         .sema_set = wndwc37e_sema_set,
 113         .sema_clr = wndwc37e_sema_clr,
 114         .ntfy_set = wndwc37e_ntfy_set,
 115         .ntfy_clr = wndwc37e_ntfy_clr,
 116         .ntfy_reset = corec37d_ntfy_init,
 117         .ntfy_wait_begun = base507c_ntfy_wait_begun,
 118         .ilut = wndwc57e_ilut,
 119         .ilut_identity = true,
 120         .xlut_set = wndwc57e_ilut_set,
 121         .xlut_clr = wndwc57e_ilut_clr,
 122         .image_set = wndwc37e_image_set,
 123         .image_clr = wndwc37e_image_clr,
 124         .update = wndwc37e_update,
 125 };
 126
 127 int
 128 wndwc57e_new(struct nouveau_drm *drm, enum drm_plane_type type, int index,
 129              s32 oclass, struct nv50_wndw **pwndw)
 130 {
 131         return wndwc37e_new_(&wndwc57e, drm, type, index, oclass,
 132                              BIT(index >> 1), pwndw);
 133 }