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-rw-r--r--linux-core/nv50_lut.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/linux-core/nv50_lut.c b/linux-core/nv50_lut.c
new file mode 100644
index 00000000..7982a926
--- /dev/null
+++ b/linux-core/nv50_lut.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2008 Maarten Maathuis.
+ * All Rights Reserved.
+ *
+ * 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 (including the
+ * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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 "nv50_lut.h"
+#include "nv50_fb.h"
+#include "nv50_crtc.h"
+#include "nv50_display.h"
+
+static int nv50_lut_alloc(struct nv50_crtc *crtc)
+{
+ struct mem_block *block;
+ struct drm_file *file_priv = kzalloc(sizeof(struct drm_file), GFP_KERNEL);
+ uint32_t flags = NOUVEAU_MEM_FB | NOUVEAU_MEM_MAPPED;
+ int rval = 0;
+
+ NV50_DEBUG("\n");
+
+ if (!file_priv)
+ return -ENOMEM;
+
+ /* Any file_priv should do as it's pointer is used as identification. */
+ block = nouveau_mem_alloc(crtc->dev, 0, 4096, flags, file_priv);
+
+ if (!block) {
+ rval = -ENOMEM;
+ goto out;
+ }
+
+ crtc->lut->block = block;
+
+ return 0;
+
+out:
+ if (file_priv)
+ kfree(file_priv);
+
+ return rval;
+}
+
+static int nv50_lut_free(struct nv50_crtc *crtc)
+{
+ struct drm_file *file_priv = crtc->lut->block->file_priv;
+
+ NV50_DEBUG("\n");
+
+ nouveau_mem_free(crtc->dev, crtc->lut->block);
+
+ kfree(file_priv);
+
+ return 0;
+}
+
+#define NV50_LUT_INDEX(val, w) ((val << (8 - w)) | (val >> ((w << 1) - 8)))
+static int nv50_lut_set(struct nv50_crtc *crtc, uint16_t *red, uint16_t *green, uint16_t *blue)
+{
+ uint32_t index = 0, i;
+ struct drm_nouveau_private *dev_priv = crtc->dev->dev_private;
+ void __iomem *lut = NULL;
+
+ NV50_DEBUG("\n");
+
+ if (!crtc->lut || !crtc->lut->block) {
+ DRM_ERROR("Something wrong with the LUT\n");
+ return -EINVAL;
+ }
+
+ /* 16 bits, red, green, blue, unused, total of 64 bits per index */
+ /* maybe switch to ioremap_wc once it becomes available. */
+ lut = ioremap(dev_priv->fb_phys + crtc->lut->block->start, crtc->lut->block->size);
+ if (!lut) {
+ DRM_ERROR("ioremap failed on LUT\n");
+ return -EINVAL;
+ }
+
+ /* 10 bits lut, with 14 bits values. */
+ switch (crtc->fb->depth) {
+ case 15:
+ /* R5G5B5 */
+ for (i = 0; i < 32; i++) {
+ index = NV50_LUT_INDEX(i, 5);
+ writew(red[i] >> 2, lut + 8*index + 0);
+ writew(green[i] >> 2, lut + 8*index + 2);
+ writew(blue[i] >> 2, lut + 8*index + 4);
+ }
+ break;
+ case 16:
+ /* R5G6B5 */
+ for (i = 0; i < 32; i++) {
+ index = NV50_LUT_INDEX(i, 5);
+ writew(red[i] >> 2, lut + 8*index + 0);
+ writew(blue[i] >> 2, lut + 8*index + 4);
+ }
+
+ /* Green has an extra bit. */
+ for (i = 0; i < 64; i++) {
+ index = NV50_LUT_INDEX(i, 6);
+ writew(green[i] >> 2, lut + 8*index + 2);
+ }
+ break;
+ default:
+ /* R8G8B8 */
+ for (i = 0; i < 256; i++) {
+ writew(red[i] >> 2, lut + 8*i + 0);
+ writew(green[i] >> 2, lut + 8*i + 2);
+ writew(blue[i] >> 2, lut + 8*i + 4);
+ }
+ break;
+ }
+
+ crtc->lut->depth = crtc->fb->depth;
+
+ /* Cleaning time. */
+ iounmap(lut);
+
+ return 0;
+}
+
+int nv50_lut_create(struct nv50_crtc *crtc)
+{
+ int rval = 0;
+
+ NV50_DEBUG("\n");
+
+ if (!crtc)
+ return -EINVAL;
+
+ crtc->lut = kzalloc(sizeof(struct nv50_lut), GFP_KERNEL);
+
+ if (!crtc->lut)
+ return -ENOMEM;
+
+ rval = nv50_lut_alloc(crtc);
+ if (rval != 0) {
+ goto out;
+ }
+
+ /* lut will be inited when fb is bound */
+ crtc->lut->depth = 0;
+
+ /* function pointers */
+ crtc->lut->set = nv50_lut_set;
+
+ return 0;
+
+out:
+ if (crtc->lut)
+ kfree(crtc->lut);
+
+ return rval;
+}
+
+int nv50_lut_destroy(struct nv50_crtc *crtc)
+{
+ int rval = 0;
+
+ NV50_DEBUG("\n");
+
+ if (!crtc)
+ return -EINVAL;
+
+ rval = nv50_lut_free(crtc);
+
+ kfree(crtc->lut);
+ crtc->lut = NULL;
+
+ if (rval != 0)
+ return rval;
+
+ return 0;
+}