1 files changed, 79 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 000000000..6b2ad1e6e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/dispnv50/lut.c
@@ -0,0 +1,79 @@
+/*
+ * 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;
+}