LXR linux/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
  31u32
  32nv50_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
  58void
  59nv50_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
  66int
  67nv50_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}
  80