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 }
80