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, bool legacy, int buffer, 33 struct drm_property_blob *blob) 34 { 35 struct drm_color_lut *in = (struct drm_color_lut *)blob->data; 36 void __iomem *mem = lut->mem[buffer].object.map.ptr; 37 const int size = blob->length / sizeof(*in); 38 int bits, shift, i; 39 u16 zero, r, g, b; 40 u32 addr = lut->mem[buffer].addr; 41 42 /* This can't happen.. But it shuts the compiler up. */ 43 if (WARN_ON(size != 256)) 44 return 0; 45 46 if (legacy) { 47 bits = 11; 48 shift = 3; 49 zero = 0x0000; 50 } else { 51 bits = 14; 52 shift = 0; 53 zero = 0x6000; 54 } 55 56 for (i = 0; i < size; i++) { 57 r = (drm_color_lut_extract(in[i]. red, bits) + zero) << shift; 58 g = (drm_color_lut_extract(in[i].green, bits) + zero) << shift; 59 b = (drm_color_lut_extract(in[i]. blue, bits) + zero) << shift; 60 writew(r, mem + (i * 0x08) + 0); 61 writew(g, mem + (i * 0x08) + 2); 62 writew(b, mem + (i * 0x08) + 4); 63 } 64 65 /* INTERPOLATE modes require a "next" entry to interpolate with, 66 * so we replicate the last entry to deal with this for now. 67 */ 68 writew(r, mem + (i * 0x08) + 0); 69 writew(g, mem + (i * 0x08) + 2); 70 writew(b, mem + (i * 0x08) + 4); 71 return addr; 72 } 73 74 void 75 nv50_lut_fini(struct nv50_lut *lut) 76 { 77 int i; 78 for (i = 0; i < ARRAY_SIZE(lut->mem); i++) 79 nvif_mem_fini(&lut->mem[i]); 80 } 81 82 int 83 nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu, 84 struct nv50_lut *lut) 85 { 86 const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025; 87 int i; 88 for (i = 0; i < ARRAY_SIZE(lut->mem); i++) { 89 int ret = nvif_mem_init_map(mmu, NVIF_MEM_VRAM, size * 8, 90 &lut->mem[i]); 91 if (ret) 92 return ret; 93 } 94 return 0; 95 } 96