2 * Copyright 2015 Intel Corporation
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28 gen4_choose_msaa_layout(const struct isl_device
*dev
,
29 const struct isl_surf_init_info
*info
,
30 enum isl_tiling tiling
,
31 enum isl_msaa_layout
*msaa_layout
)
33 /* Gen4 and Gen5 do not support MSAA */
34 assert(info
->samples
>= 1);
36 *msaa_layout
= ISL_MSAA_LAYOUT_NONE
;
41 gen4_choose_lod_alignment_el(const struct isl_device
*dev
,
42 const struct isl_surf_init_info
*restrict info
,
43 enum isl_tiling tiling
,
44 enum isl_msaa_layout msaa_layout
,
45 struct isl_extent3d
*lod_align_el
)
47 assert(info
->samples
== 1);
48 assert(msaa_layout
== ISL_MSAA_LAYOUT_NONE
);
49 assert(!isl_tiling_is_std_y(tiling
));
51 /* Note that neither the surface's horizontal nor vertical image alignment
52 * is programmable on gen4 nor gen5.
54 * From the G35 PRM (2008-01), Volume 1 Graphics Core, Section 6.17.3.4
55 * Alignment Unit Size:
57 * Note that the compressed formats are padded to a full compression
60 * +------------------------+--------+--------+
61 * | format | halign | valign |
62 * +------------------------+--------+--------+
63 * | YUV 4:2:2 formats | 4 | 2 |
64 * | uncompressed formats | 4 | 2 |
65 * +------------------------+--------+--------+
68 if (isl_format_is_compressed(info
->format
)) {
69 *lod_align_el
= isl_extent3d(1, 1, 1);
73 *lod_align_el
= isl_extent3d(4, 2, 1);