1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/dispnv50/lut.c b/drivers/gpu/drm/nouveau/dispnv50/lut.c
new file mode 100644
index 000000000000..a6b96ae2a22f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/dispnv50/lut.c
@@ -0,0 +1,95 @@
+/*
+ * 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;
+}