[Bug 105301] The big SKQP bug

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105301

--- Comment #10 from Carlos Santa <carlos.santa at intel.com> ---
Hi,

Here are more details to the CTS issue we are trying to solve.

We are able to repro 100% in the Android container under Chrome OS running
Linux kernel 4.4 and Mesa 18. We can also repro under Celadon/NUC/drm tip
running kernel 4.19 and Mesa 18.

The code from the upper layer is here :
http://androidxref.com/9.0.0_r3/xref/external/skia/gm/mixedtextblobs.cpp#20

There are 3 main draw calls()

26    SkPaint paint(skPaint);
28    canvas->drawRect(clipRect, clipHairline);
30    canvas->drawTextBlob(blob, 0, 0, paint);
33    canvas->drawTextBlob(blob, 0, 0, paint);

We are still trying to see what these functions are in GL apis (more soon).

The IPHER, which points to the command that hung is at IPEHR: 0x78260000, and
that address point to 3DSTATE_BINDING_TABLE_POINTERS_VS

0xe60003ac:      0x784f0000: 3D UNKNOWN: 3d_965 opcode = 0x784f
0xe60003b0:      0x90000100: UNKNOWN
0xe60003b4:      0x78230000: 3D UNKNOWN: 3d_965 opcode = 0x7823
0xe60003b8:      0x00000140: MI_NOOP
0xe60003bc:      0x78260000: 3DSTATE_BINDING_TABLE_POINTERS_VS
0xe60003c0:      0x00000000:    dword 1
0xe60003c4:      0x78270000: 3DSTATE_BINDING_TABLE_POINTERS_HS
0xe60003c8:      0x00000000:    dword 1
0xe60003cc:      0x78280000: 3DSTATE_BINDING_TABLE_POINTERS_DS
0xe60003d0:      0x00000000:    dword 1
0xe60003d4:      0x78290000: 3DSTATE_BINDING_TABLE_POINTERS_GS
0xe60003d8:      0x00000000:    dword 1
0xe60003dc:      0x782a0000: 3DSTATE_BINDING_TABLE_POINTERS_PS
0xe60003e0:      0x00000160:    dword 1

The documentation says this: The 3DSTATE_BINDING_TABLE_POINTERS_VS command is
used to define the location of fixed functions'
BINDING_TABLE_STATE. Only some of the fixed functions utilize binding tables.

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