[Bug 90138] minor font corruption on baytrail since sna: Enable blitting with Y-tiled surfaces

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90138

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
I hope

commit 4fdd3a714d380afd3d6425aedbbf2ae20180638b
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Apr 22 14:08:17 2015 +0100

    sna/gen6+: Discourage use of the BLT with Y-tiling

    Somewhere, somehow the first glyph character upload into the Y-tiled
    glyph cache is corrupt since

    commit 75d87762471e195dddd73056fc6a06e17db1c8b0
    Author: Chris Wilson <chris at chris-wilson.co.uk>
    Date:   Fri Apr 17 10:29:28 2015 +0100

        sna: Enable blitting with Y-tiled surfaces

    I have not spotted whether it is a missing magic bit or a bad GTT path,
    but ideally we don't want to switch to BLT along that path anyway (since
    we are in the middle of rendering with the other engine).

    Reported-by: Andy Furniss <adf.lists at gmail.com>
    References: https://bugs.freedesktop.org/show_bug.cgi?id=90138
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

sweeps it back under the carpet.

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