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/*
* Copyright 2015 Intel Corporation
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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 "isl_gen4.h"
#include "isl_priv.h"
bool
gen4_choose_msaa_layout(const struct isl_device *dev,
const struct isl_surf_init_info *info,
enum isl_tiling tiling,
enum isl_msaa_layout *msaa_layout)
{
/* Gen4 and Gen5 do not support MSAA */
assert(info->samples >= 1);
*msaa_layout = ISL_MSAA_LAYOUT_NONE;
return true;
}
void
gen4_choose_lod_alignment_el(const struct isl_device *dev,
const struct isl_surf_init_info *restrict info,
enum isl_tiling tiling,
enum isl_msaa_layout msaa_layout,
struct isl_extent3d *lod_align_el)
{
assert(info->samples == 1);
assert(msaa_layout == ISL_MSAA_LAYOUT_NONE);
assert(!isl_tiling_is_std_y(tiling));
/* Note that neither the surface's horizontal nor vertical image alignment
* is programmable on gen4 nor gen5.
*
* From the G35 PRM (2008-01), Volume 1 Graphics Core, Section 6.17.3.4
* Alignment Unit Size:
*
* Note that the compressed formats are padded to a full compression
* cell.
*
* +------------------------+--------+--------+
* | format | halign | valign |
* +------------------------+--------+--------+
* | YUV 4:2:2 formats | 4 | 2 |
* | uncompressed formats | 4 | 2 |
* +------------------------+--------+--------+
*/
if (isl_format_is_compressed(info->format)) {
*lod_align_el = isl_extent3d(1, 1, 1);
return;
}
*lod_align_el = isl_extent3d(4, 2, 1);
}
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