nouveau/dispnv50/lut.c

0001 /*
0002  * Copyright 2018 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  */
0022 #include "lut.h"
0023 #include "disp.h"
0024
0025 #include <drm/drm_color_mgmt.h>
0026 #include <drm/drm_mode.h>
0027 #include <drm/drm_property.h>
0028
0029 #include <nvif/class.h>
0030
0031 u32
0032 nv50_lut_load(struct nv50_lut *lut, int buffer, struct drm_property_blob *blob,
0033           void (*load)(struct drm_color_lut *, int, void __iomem *))
0034 {
0035     struct drm_color_lut *in = blob ? blob->data : NULL;
0036     void __iomem *mem = lut->mem[buffer].object.map.ptr;
0037     const u32 addr = lut->mem[buffer].addr;
0038     int i;
0039
0040     if (!in) {
0041         in = kvmalloc_array(1024, sizeof(*in), GFP_KERNEL);
0042         if (!WARN_ON(!in)) {
0043             for (i = 0; i < 1024; i++) {
0044                 in[i].red   =
0045                 in[i].green =
0046                 in[i].blue  = (i << 16) >> 10;
0047             }
0048             load(in, 1024, mem);
0049             kvfree(in);
0050         }
0051     } else {
0052         load(in, drm_color_lut_size(blob), mem);
0053     }
0054
0055     return addr;
0056 }
0057
0058 void
0059 nv50_lut_fini(struct nv50_lut *lut)
0060 {
0061     int i;
0062     for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
0063         nvif_mem_dtor(&lut->mem[i]);
0064 }
0065
0066 int
0067 nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu,
0068           struct nv50_lut *lut)
0069 {
0070     const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025;
0071     int i;
0072     for (i = 0; i < ARRAY_SIZE(lut->mem); i++) {
0073         int ret = nvif_mem_ctor_map(mmu, "kmsLut", NVIF_MEM_VRAM,
0074                         size * 8, &lut->mem[i]);
0075         if (ret)
0076             return ret;
0077     }
0078     return 0;
0079 }