drivers/gpu/drm/nouveau/dispnv50/lut.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 "lut.h"
  23 #include "disp.h"
  24
  25 #include <drm/drm_color_mgmt.h>
  26 #include <drm/drm_mode.h>
  27 #include <drm/drm_property.h>
  28
  29 #include <nvif/class.h>
  30
  31 u32
  32 nv50_lut_load(struct nv50_lut *lut, int buffer, struct drm_property_blob *blob,
  33               void (*load)(struct drm_color_lut *, int, void __iomem *))
  34 {
  35         struct drm_color_lut *in = blob ? blob->data : NULL;
  36         void __iomem *mem = lut->mem[buffer].object.map.ptr;
  37         const u32 addr = lut->mem[buffer].addr;
  38         int i;
  39
  40         if (!in) {
  41                 in = kvmalloc_array(1024, sizeof(*in), GFP_KERNEL);
  42                 if (!WARN_ON(!in)) {
  43                         for (i = 0; i < 1024; i++) {
  44                                 in[i].red   =
  45                                 in[i].green =
  46                                 in[i].blue  = (i << 16) >> 10;
  47                         }
  48                         load(in, 1024, mem);
  49                         kvfree(in);
  50                 }
  51         } else {
  52                 load(in, drm_color_lut_size(blob), mem);
  53         }
  54
  55         return addr;
  56 }
  57
  58 void
  59 nv50_lut_fini(struct nv50_lut *lut)
  60 {
  61         int i;
  62         for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
  63                 nvif_mem_dtor(&lut->mem[i]);
  64 }
  65
  66 int
  67 nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu,
  68               struct nv50_lut *lut)
  69 {
  70         const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025;
  71         int i;
  72         for (i = 0; i < ARRAY_SIZE(lut->mem); i++) {
  73                 int ret = nvif_mem_ctor_map(mmu, "kmsLut", NVIF_MEM_VRAM,
  74                                             size * 8, &lut->mem[i]);
  75                 if (ret)
  76                         return ret;
  77         }
  78         return 0;
  79 }