1 /* $NetBSD: nouveau_dispnv50_lut.c,v 1.3 2021/12/19 10:49:47 riastradh Exp $ */
2
3 /*
4 * Copyright 2018 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24 #include <sys/cdefs.h>
25 __KERNEL_RCSID(0, "$NetBSD: nouveau_dispnv50_lut.c,v 1.3 2021/12/19 10:49:47 riastradh Exp $");
26
27 #include "lut.h"
28 #include "disp.h"
29
30 #include <drm/drm_color_mgmt.h>
31 #include <drm/drm_mode.h>
32 #include <drm/drm_property.h>
33
34 #include <nvif/class.h>
35
36 #ifdef __NetBSD__
37 #define __iomem __lut_iomem
38 #define readw(p) atomic_load_relaxed((const __iomem uint16_t *)(p))
39 #define writew(v,p) atomic_store_relaxed((__iomem uint16_t *)(p), (v))
40 #endif
41
42 u32
nv50_lut_load(struct nv50_lut * lut,int buffer,struct drm_property_blob * blob,void (* load)(struct drm_color_lut *,int,void __iomem *))43 nv50_lut_load(struct nv50_lut *lut, int buffer, struct drm_property_blob *blob,
44 void (*load)(struct drm_color_lut *, int, void __iomem *))
45 {
46 struct drm_color_lut *in = blob ? blob->data : NULL;
47 void __iomem *mem = lut->mem[buffer].object.map.ptr;
48 const u32 addr = lut->mem[buffer].addr;
49 int i;
50
51 if (!in) {
52 in = kvmalloc_array(1024, sizeof(*in), GFP_KERNEL);
53 if (!WARN_ON(!in)) {
54 for (i = 0; i < 1024; i++) {
55 in[i].red =
56 in[i].green =
57 in[i].blue = (i << 16) >> 10;
58 }
59 load(in, 1024, mem);
60 kvfree(in);
61 }
62 } else {
63 load(in, drm_color_lut_size(blob), mem);
64 }
65
66 return addr;
67 }
68
69 void
nv50_lut_fini(struct nv50_lut * lut)70 nv50_lut_fini(struct nv50_lut *lut)
71 {
72 int i;
73 for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
74 nvif_mem_fini(&lut->mem[i]);
75 }
76
77 int
nv50_lut_init(struct nv50_disp * disp,struct nvif_mmu * mmu,struct nv50_lut * lut)78 nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu,
79 struct nv50_lut *lut)
80 {
81 const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025;
82 int i;
83 for (i = 0; i < ARRAY_SIZE(lut->mem); i++) {
84 int ret = nvif_mem_init_map(mmu, NVIF_MEM_VRAM, size * 8,
85 &lut->mem[i]);
86 if (ret)
87 return ret;
88 }
89 return 0;
90 }
91