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freedreno/a6xx: document some unknown bits

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Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3814>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3814>
This commit is contained in:
Jonathan Marek
2020-02-11 21:08:58 -05:00
parent 75fbe089a6
commit 946eacbafb
3 changed files with 12 additions and 4 deletions
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src/freedreno/registers/a6xx.xml
+9 -1
View File
@@ -1767,7 +1767,15 @@ to upconvert to 32b float internally?
<!-- always 0x03200000 ? -->
<reg32 offset="0x0e12" name="UCHE_UNKNOWN_0E12"/>
<reg32 offset="0x8000" name="GRAS_UNKNOWN_8000"/>
<reg32 offset="0x8000" name="GRAS_DISABLE_CNTL">
<!-- likely something clip-disable related -->
<bitfield name="UNK0" pos="0" type="boolean"/>
<!-- guess based on a3xx and meaning of bits 8 and 9
if the guess is right then this is related to point sprite clipping -->
<bitfield name="VP_CLIP_CODE_IGNORE" pos="7" type="boolean"/>
<bitfield name="VP_XFORM_DISABLE" pos="8" type="boolean"/>
<bitfield name="PERSP_DIVISION_DISABLE" pos="9" type="boolean"/>
</reg32>
<reg32 offset="0x8001" name="GRAS_UNKNOWN_8001"/>
<reg32 offset="0x8002" name="GRAS_UNKNOWN_8002"/>
<reg32 offset="0x8003" name="GRAS_UNKNOWN_8003"/>
src/freedreno/vulkan/tu_pipeline.c
+2 -2
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@@ -1223,8 +1223,8 @@ tu6_emit_scissor(struct tu_cs *cs, const VkRect2D *scissor)
static void
tu6_emit_gras_unknowns(struct tu_cs *cs)
{
tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_UNKNOWN_8000, 1);
tu_cs_emit(cs, 0x80);
tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_DISABLE_CNTL, 1);
tu_cs_emit(cs, A6XX_GRAS_DISABLE_CNTL_VP_CLIP_CODE_IGNORE);
tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_UNKNOWN_8001, 1);
tu_cs_emit(cs, 0x0);
tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_LAYER_CNTL, 1);
src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c
+1 -1
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@@ -52,7 +52,7 @@ __fd6_setup_rasterizer_stateobj(struct fd_context *ctx,
}
OUT_REG(ring,
A6XX_GRAS_UNKNOWN_8000(.unknown = 0x80),
A6XX_GRAS_DISABLE_CNTL(.vp_clip_code_ignore = 1),
A6XX_GRAS_UNKNOWN_8001());
OUT_REG(ring,