From: Ruben Ortlam <redacted>
Date: Mon, 12 Jan 2026 06:29:35 +0000 (+0100)
Subject: vulkan: Disable large coopmat matmul configuration on proprietary AMD driver (#18763)
X-Git-Tag: upstream/0.0.7721~12
X-Git-Url: https://git.djapps.eu/?a=commitdiff_plain;h=1051ecd28907d2ca0a15c135f190fe415d0a3d1b;p=pkg%2Fggml%2Fsources%2Fllama.cpp

vulkan: Disable large coopmat matmul configuration on proprietary AMD driver (#18763)

* vulkan: Disable large coopmat matmul configuration on proprietary AMD driver

* Also disable the large tile size
---

diff --git a/ggml/src/ggml-vulkan/ggml-vulkan.cpp b/ggml/src/ggml-vulkan/ggml-vulkan.cpp
index 0d658575..ba5252b8 100644
--- a/ggml/src/ggml-vulkan/ggml-vulkan.cpp
+++ b/ggml/src/ggml-vulkan/ggml-vulkan.cpp
@@ -3002,7 +3002,7 @@ static void ggml_vk_load_shaders(vk_device& device) {
         if ((device->architecture == AMD_GCN) && (device->driver_id != vk::DriverId::eAmdProprietary)) {
             m_warptile_mmq = m_warptile_mmq_int = { 256, 64, 64, 32, 16, 16, 2, 2, 2, 1, 16 };
             m_warptile_mmqid = m_warptile_mmqid_int = { 256, 64, 64, 32, 16, 16, 2, 2, 2, 1, 16 };
-        } else if (device->vendor_id == VK_VENDOR_ID_AMD && device->coopmat_support) {
+        } else if (device->vendor_id == VK_VENDOR_ID_AMD && device->coopmat_support && device->driver_id != vk::DriverId::eAmdProprietary) {
             // This is intentionally using tx_m values, slight performance increase
             l_warptile = { 256, 128, 128, 16, subgroup_size_8, 64, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
             l_warptile_mmq = l_warptile_mmq_int = { 256, 128, 128, 32, subgroup_size_8, 64, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
@@ -5083,7 +5083,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
             switch (device->vendor_id) {
 #ifndef GGML_VULKAN_RUN_TESTS
             case VK_VENDOR_ID_AMD:
-                device->mul_mat_l[i]    = device->coopmat_support;
+                device->mul_mat_l[i]    = device->coopmat_support && device->driver_id != vk::DriverId::eAmdProprietary;
                 device->mul_mat_m[i]    = true;
                 device->mul_mat_s[i]    = true;
                 device->mul_mat_id_l[i] = false;