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/*
* Copyright 2018 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "lut.h"
#include "disp.h"
#include <drm/drm_color_mgmt.h>
#include <drm/drm_mode.h>
#include <drm/drm_property.h>
#include <nvif/class.h>
u32
nv50_lut_load(struct nv50_lut *lut, bool legacy, int buffer,
struct drm_property_blob *blob)
{
struct drm_color_lut *in = (struct drm_color_lut *)blob->data;
void __iomem *mem = lut->mem[buffer].object.map.ptr;
const int size = blob->length / sizeof(*in);
int bits, shift, i;
u16 zero, r, g, b;
u32 addr = lut->mem[buffer].addr;
/* This can't happen.. But it shuts the compiler up. */
if (WARN_ON(size != 256))
return 0;
if (legacy) {
bits = 11;
shift = 3;
zero = 0x0000;
} else {
bits = 14;
shift = 0;
zero = 0x6000;
}
for (i = 0; i < size; i++) {
r = (drm_color_lut_extract(in[i]. red, bits) + zero) << shift;
g = (drm_color_lut_extract(in[i].green, bits) + zero) << shift;
b = (drm_color_lut_extract(in[i]. blue, bits) + zero) << shift;
writew(r, mem + (i * 0x08) + 0);
writew(g, mem + (i * 0x08) + 2);
writew(b, mem + (i * 0x08) + 4);
}
/* INTERPOLATE modes require a "next" entry to interpolate with,
* so we replicate the last entry to deal with this for now.
*/
writew(r, mem + (i * 0x08) + 0);
writew(g, mem + (i * 0x08) + 2);
writew(b, mem + (i * 0x08) + 4);
return addr;
}
void
nv50_lut_fini(struct nv50_lut *lut)
{
int i;
for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
nvif_mem_fini(&lut->mem[i]);
}
int
nv50_lut_init(struct nv50_disp *disp, struct nvif_mmu *mmu,
struct nv50_lut *lut)
{
const u32 size = disp->disp->object.oclass < GF110_DISP ? 257 : 1025;
int i;
for (i = 0; i < ARRAY_SIZE(lut->mem); i++) {
int ret = nvif_mem_init_map(mmu, NVIF_MEM_VRAM, size * 8,
&lut->mem[i]);
if (ret)
return ret;
}
return 0;
}
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