/* * 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"base.h"
staticinline u32
csc_drm_to_base(u64 in)
{ /* base takes a 19-bit 2's complement value in S3.16 format */ bool sign = in & BIT_ULL(63);
u32 integer = (in >> 32) & 0x7fffffff;
u32 fraction = in & 0xffffffff;
if (integer >= 4) { return (1 << 18) - (sign ? 0 : 1);
} else {
u32 ret = (integer << 16) | (fraction >> 16); if (sign)
ret = -ret; return ret & GENMASK(18, 0);
}
}
void
base907c_csc(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, conststruct drm_color_ctm *ctm)
{ int i, j;
for (j = 0; j < 3; j++) { for (i = 0; i < 4; i++) {
u32 *val = &asyw->csc.matrix[j * 4 + i]; /* DRM does not support constant offset, while
* HW CSC does. Skip it. */ if (i == 3) {
*val = 0;
} else {
*val = csc_drm_to_base(ctm->matrix[j * 3 + i]);
}
}
}
}
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