[Fix] (Espryt): re-arm the packed16 probe on the allocation-scoped mirror the device actually has and let any mirrored level trigger the widening

MobileGL/MG_Util/SelfTest/DriverBugProbes.h

@@ -299,31 +299,34 @@ namespace MobileGL::MG_Util::SelfTest {
     const ImageCoherencyResidualMeasurement& ImageWriteReadCoherencyResidual(
         const MG_External::GLESFunctionsTable& gl);
 
-    // Copies one known GL_UNSIGNED_SHORT_5_5_5_1 word out of a GL_RGB5_A1 2D array's mip
-    // level 1 into a plain 2D image with glCopyImageSubData and reads the landed texel back.
-    // Returns true only when the level-1 copy delivers the word's 5_5_5_1 <-> 1_5_5_5_REV
-    // field-order mirror while the identical level-0 copy delivers the word itself.
+    // Copies one known GL_UNSIGNED_SHORT_5_5_5_1 word out of BOTH mip levels of a GL_RGB5_A1
+    // 2D array into plain 2D images with glCopyImageSubData and reads the landed texels back.
+    // Returns true only when a copy from EITHER level delivers the word's 5_5_5_1 <->
+    // 1_5_5_5_REV field-order mirror while both controls below hold.
     //
-    // The affected Mali stores 16-bit packed texels (RGB565 / RGB5_A1 / RGBA4) at a non-zero
-    // mip level of a 2D array in the *_REV field order every other image does NOT use.
-    // Uploads and readbacks decode that layout consistently, so nothing but a raw texel-block
-    // move can see it - which is exactly what glCopyImageSubData is defined to be, and why
-    // the whole KHR-GL4x.copy_image rgb5/rgb5_a1/rgba4 x *2d_array* matrix fails there while
-    // every other suite touching these formats passes. The textures reproduce the failing
-    // shape verbatim - THREE-level chains on both endpoints (30/15/7 x12 for the array,
-    // 7/3/1 for the plain 2D image), exactly the CTS's FUNCTIONAL_TEST_N_LEVELS = 3
-    // allocation - because a 14x14 base's level 1 measured clean on the same driver, so
-    // every deviation from the measured shape risks landing on the clean side of whatever
-    // allocation threshold picks the driver's layout, and a probe miss here is not a red
-    // test: it is the widening silently staying inert with all 18 bodies still failing.
+    // The affected Mali stores SOME 16-bit packed allocations (RGB565 / RGB5_A1 / RGBA4) with
+    // their fields packed from the other end of the word, and the mirrored layout is an
+    // ALLOCATION property, not a mip-level one: on the failing device this probe's 30x30x12
+    // three-level array delivers the mirror from level 0 and level 1 alike, which is what
+    // vetoed the first deployment's "level 0 is the clean control" design. Which allocations
+    // mirror depends on shape AND context history (a raw standalone context mirrors one- and
+    // two-level 30x30x12 arrays but not a fresh three-level one; MobileGL's live context
+    // mirrors the three-level one too), so the probe measures IN SITU - this context is the
+    // one the application's copies run in - on the CTS's own failing shape (three-level
+    // chains both endpoints: 30/15/7 x12 array, 7/3/1 plain, FUNCTIONAL_TEST_N_LEVELS = 3).
+    // Uploads and readbacks decode each image's own layout consistently, so nothing but a raw
+    // texel-block move can see the divergence - which is exactly what glCopyImageSubData is
+    // defined to be, and why the whole KHR-GL4x.copy_image rgb5/rgb5_a1/rgba4 x *2d_array*
+    // matrix fails there while every other suite touching these formats passes.
     //
-    // THE CONTROL is the identical copy out of mip level 0, which is clean on the affected
-    // driver too: it proves copy_image works between these images at all and that the
-    // upload/readback round trip is exact, so a driver that cannot host the shape reaches no
-    // verdict instead of being reported as this. The subject must also match the mirror
-    // PREDICTION, not merely differ from the expectation - a copy that delivered anything
-    // else is a different defect and reaches no verdict either. Restores every piece of GL
-    // state it touches.
+    // TWO CONTROLS. The machinery: an identical copy between two SAME-shape plain-2D images,
+    // which share a layout whatever it is, so it must deliver the word on any driver that can
+    // run copy_image on these formats - a driver that cannot reaches no verdict instead of
+    // being reported as this. And the array's own round trip: a direct FBO readback of its
+    // level 1 must answer the word, or the UPLOAD is what corrupts - a different defect. The
+    // subjects must also match the mirror PREDICTION, not merely differ from the word - a
+    // copy that delivered anything else is a different defect and reaches no verdict either.
+    // Restores every piece of GL state it touches.
     Bool ProbeCopyImageMirrorsPacked16FieldOrder(const MG_External::GLESFunctionsTable& gl);
 
     // ProbeCopyImageMirrorsPacked16FieldOrder(), evaluated at most once per process. The