If a mipfilter is not set, it's legal to have an incomplete mipmap; we
should handle this accordingly. An "easy way out" is to rig the LOD
clamps.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzw...@collabora.com>
---
src/gallium/drivers/panfrost/pan_context.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/gallium/drivers/panfrost/pan_context.c
b/src/gallium/drivers/panfrost/pan_context.c
index ceea48c401a..c4ea7175033 100644
--- a/src/gallium/drivers/panfrost/pan_context.c
+++ b/src/gallium/drivers/panfrost/pan_context.c
@@ -1776,6 +1776,22 @@ panfrost_create_sampler_state(
.unknown2 = 1,
};
+ /* If necessary, we disable mipmapping in the sampler descriptor by
+ * clamping the LOD as tight as possible (from 0 to epsilon,
+ * essentially -- remember these are fixed point numbers, so
+ * epsilon=1/256) */
+
+ if (cso->min_mip_filter == PIPE_TEX_MIPFILTER_NONE)
+ sampler_descriptor.max_lod = sampler_descriptor.min_lod;
+
+ /* Enforce that there is something in the middle by adding epsilon*/
+
+ if (sampler_descriptor.min_lod == sampler_descriptor.max_lod)
+ sampler_descriptor.max_lod++;
+
+ /* Sanity check */
+ assert(sampler_descriptor.max_lod > sampler_descriptor.min_lod);
+
so->hw = sampler_descriptor;
return so;
--
2.20.1
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