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radv: fix setting CB_SHADER_MASK for dual source blending

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CB_SHADER_MASK was computed without the second color buffer
format which looks totally wrong to me.

While we are at it, copy a comment from RadeonSI.

Cc: 19.0 19.1 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-By: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset
2019-06-06 14:46:47 +02:00
parent 50ffaaff3b
commit e9316fdfd4
1 changed files with 5 additions and 2 deletions
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7
src/amd/vulkan/radv_pipeline.c
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@@ -541,10 +541,13 @@ radv_pipeline_compute_spi_color_formats(struct radv_pipeline *pipeline,
}
}
blend->cb_shader_mask = ac_get_cb_shader_mask(col_format);
/* The output for dual source blending should have the same format as
* the first output.
*/
if (blend->mrt0_is_dual_src)
col_format |= (col_format & 0xf) << 4;
blend->cb_shader_mask = ac_get_cb_shader_mask(col_format);
blend->spi_shader_col_format = col_format;
}