radv: Fix rasterization precision bits.

Note that these limits are exact, not a "precision is at least x",
as texel coords also get snapped to a multiple of this step size
before filtering.

This fixes CTS tests

dEQP-VK.texture.explicit_lod.2d.sizes.31x55_nearest_linear_mipmap_nearest_repeat
dEQP-VK.texture.explicit_lod.2d.sizes.57x35_nearest_linear_mipmap_nearest_repeat

Fixes: f4e499ec791 "radv: add initial non-conformant radv vulkan driver"
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109151
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 814b5cc..a1199c6 100644 (file)
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -939,9 +939,9 @@ void radv_GetPhysicalDeviceProperties(
                        2048,
                        2048
                },
-               .subPixelPrecisionBits                    = 4 /* FIXME */,
-               .subTexelPrecisionBits                    = 4 /* FIXME */,
-               .mipmapPrecisionBits                      = 4 /* FIXME */,
+               .subPixelPrecisionBits                    = 8,
+               .subTexelPrecisionBits                    = 8,
+               .mipmapPrecisionBits                      = 8,
                .maxDrawIndexedIndexValue                 = UINT32_MAX,
                .maxDrawIndirectCount                     = UINT32_MAX,
                .maxSamplerLodBias                        = 16,