anv/formats: Use the real format for B4G4R4A4_UNORM_PACK16 on gen8

Because border color is handled pre-swizzle, when we move the alpha
channel around in the format, the OPAQUE_BLACK border colors don't work
correctly on B4G4R4A4_UNORM_PACK16 with the hack.  This fixes the
following Vulkan CTS tests on Broadwell:

dEQP-VK.pipeline.sampler.view_type.2d_array.format.b4g4r4a4_unorm_pack16.address_modes.all_mode_clamp_to_border_opaque_black
dEQP-VK.pipeline.sampler.view_type.1d_array.format.b4g4r4a4_unorm_pack16.address_modes.all_mode_clamp_to_border_opaque_black
dEQP-VK.pipeline.sampler.view_type.2d.format.b4g4r4a4_unorm_pack16.address_modes.all_mode_clamp_to_border_opaque_black
dEQP-VK.pipeline.sampler.view_type.1d.format.b4g4r4a4_unorm_pack16.address_modes.all_mode_clamp_to_border_opaque_black
dEQP-VK.pipeline.sampler.view_type.3d.format.b4g4r4a4_unorm_pack16.address_modes.all_mode_clamp_to_border_opaque_black

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>

diff --git a/src/intel/vulkan/anv_formats.c b/src/intel/vulkan/anv_formats.c
index 9ef998cfff2a22d860ab1f0cc6b9030f34eec565..1ee4d0fa191e1b1b47e6c5d4ff40e7d97cda2e77 100644 (file)
--- a/src/intel/vulkan/anv_formats.c
+++ b/src/intel/vulkan/anv_formats.c
@@ -295,10 +295,10 @@ anv_get_format(const struct gen_device_info *devinfo, VkFormat vk_format,
       }
    }
 
-   /* The B4G4R4A4 format isn't available prior to Sky Lake so we have to fall
+   /* The B4G4R4A4 format isn't available prior to Broadwell so we have to fall
     * back to a format with a more complex swizzle.
     */
-   if (vk_format == VK_FORMAT_B4G4R4A4_UNORM_PACK16 && devinfo->gen < 9) {
+   if (vk_format == VK_FORMAT_B4G4R4A4_UNORM_PACK16 && devinfo->gen < 8) {
       return (struct anv_format) {
          .isl_format = ISL_FORMAT_B4G4R4A4_UNORM,
          .swizzle = ISL_SWIZZLE(GREEN, RED, ALPHA, BLUE),