radv: set some dcc parameters depending on if texture will be sampled

This is ported from amdvlk which sets the independent 64b blocks
only for image which will sample dcc.

I'm not sure how to port this to radeonsi.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 24219d6..788252c 100644 (file)
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -3163,6 +3163,8 @@ radv_initialise_color_surface(struct radv_device *device,
        if (device->physical_device->rad_info.chip_class >= VI) {
                unsigned max_uncompressed_block_size = V_028C78_MAX_BLOCK_SIZE_256B;
                unsigned min_compressed_block_size = V_028C78_MIN_BLOCK_SIZE_32B;
+               unsigned independent_64b_blocks = 0;
+               unsigned max_compressed_block_size;
 
                /* amdvlk: [min-compressed-block-size] should be set to 32 for dGPU and
                   64 for APU because all of our APUs to date use DIMMs which have
@@ -3178,9 +3180,16 @@ radv_initialise_color_surface(struct radv_device *device,
                                max_uncompressed_block_size = V_028C78_MAX_BLOCK_SIZE_128B;
                }
 
+               if (iview->image->usage & (VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT)) {
+                       independent_64b_blocks = 1;
+                       max_compressed_block_size = V_028C78_MAX_BLOCK_SIZE_64B;
+               } else
+                       max_compressed_block_size = max_uncompressed_block_size;
+
                cb->cb_dcc_control = S_028C78_MAX_UNCOMPRESSED_BLOCK_SIZE(max_uncompressed_block_size) |
+                       S_028C78_MAX_COMPRESSED_BLOCK_SIZE(max_compressed_block_size) |
                        S_028C78_MIN_COMPRESSED_BLOCK_SIZE(min_compressed_block_size) |
-                       S_028C78_INDEPENDENT_64B_BLOCKS(1);
+                       S_028C78_INDEPENDENT_64B_BLOCKS(independent_64b_blocks);
        }
 
        /* This must be set for fast clear to work without FMASK. */