isl: Don't align phys_level0_sa by block dimension
Aligning phys_level0_sa by the compression block dimension prior to mipmap layout causes the layout of compressed surfaces to differ from the sampler's expectations in certain cases. The hardware docs agree: From the BDW PRM, Vol. 5, Compressed Mipmap Layout, The compressed mipmaps are stored in a similar fashion to uncompressed mipmaps [...] The following exceptions apply to the layout of compressed (vs. uncompressed) mipmaps: * [...] * The dimensions of the mip maps are first determined by applying the sizing algorithm presented in Non-Power-of-Two Mipmaps above. Then, if necessary, they are padded out to compression block boundaries. The last bullet indicates that alignment should not be done for calculating a miplevel's dimensions, but rather for determining miplevel placement/padding. Comply with this text by removing the extra alignment. Fixes some fbo-generatemipmap-formats piglit failures on all tested platforms (SNB-KBL). v2: - Note fixed platforms. - Update some consumers via a helper function. Cc: <mesa-stable@lists.freedesktop.org> Reviewed-by:Kenneth Graunke <kenneth@whitecape.org> (cherry picked from commit 02f6995d)