diff options
Diffstat (limited to 'linux-core/nv50_lut.c')
| -rw-r--r-- | linux-core/nv50_lut.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/linux-core/nv50_lut.c b/linux-core/nv50_lut.c new file mode 100644 index 00000000..570900ba --- /dev/null +++ b/linux-core/nv50_lut.c @@ -0,0 +1,171 @@ +/* + * 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_INTERNAL | NOUVEAU_MEM_FB | NOUVEAU_MEM_MAPPED; + + NV50_DEBUG("\n"); + + /* 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) + return -ENOMEM; + + crtc->lut->block = block; + + return 0; +} + +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); + + rval = nv50_lut_alloc(crtc); + if (rval != 0) + return rval; + + /* lut will be inited when fb is bound */ + crtc->lut->depth = 0; + + /* function pointers */ + crtc->lut->set = nv50_lut_set; + + return 0; +} + +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; +} |