linux/drivers/gpu/drm/nouveau/dispnv50/lut.c

/*
 * 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, int buffer, struct drm_property_blob *blob,
	      void (*load)(struct drm_color_lut *, int, void __iomem *))
{
	struct drm_color_lut *in = blob ? blob->data : NULL;
	void __iomem *mem = lut->mem[buffer].object.map.ptr;
	const u32 addr = lut->mem[buffer].addr;
	int i;

	if (!in) {
		in = kvmalloc_array(1024, sizeof(*in), GFP_KERNEL);
		if (!WARN_ON(!in)) {
			for (i = 0; i < 1024; i++) {
				in[i].red   =
				in[i].green =
				in[i].blue  = (i << 16) >> 10;
			}
			load(in, 1024, mem);
			kvfree(in);
		}
	} else {
		load(in, drm_color_lut_size(blob), mem);
	}

	return addr;
}

void
nv50_lut_fini(struct nv50_lut *lut)
{
	int i;
	for (i = 0; i < ARRAY_SIZE(lut->mem); i++)
		nvif_mem_dtor(&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_ctor_map(mmu, "kmsLut", NVIF_MEM_VRAM,
					    size * 8, &lut->mem[i]);
		if (ret)
			return ret;
	}
	return 0;
}