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vc4: Drop maximum number of varyings down to 8.

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There are only 32 bits in the flatshade flags (which are 1 bit per
component), the simulator crashes when you use more than about this many
varyings, and the original Broadcom code drop only exposed 8 as well.

Fixes 26 piglit tests in the varying-packing group, and makes many others
go from crash to fail (due to not checking their varying counts and
treating link failures as failures).  Regresses ARB_fp/minmax (due to 8
varyings instead of 10).
This commit is contained in:
Eric Anholt 2014-09-23 17:25:43 -07:00
parent 45b104e0a2
commit bf4aecfb2a
1 changed files with 4 additions and 1 deletions
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5
src/gallium/drivers/vc4/vc4_screen.c
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@ -276,7 +276,10 @@ vc4_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
return 0;
case PIPE_SHADER_CAP_MAX_INPUTS:
return 16;
if (shader == PIPE_SHADER_FRAGMENT)
return 8;
else
return 16;
case PIPE_SHADER_CAP_MAX_TEMPS:
return 256; /* GL_MAX_PROGRAM_TEMPORARIES_ARB */
case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE: