gate the mockdsp behind MOCKDSP=1 [pr] (#10486)

.github/workflows/test.yml

@@ -544,6 +544,8 @@ jobs:
         tags: qemu-hexagon:latest
         cache-from: type=gha
         cache-to: type=gha,mode=min
+    - name: Set MOCKDSP env
+      run: printf "MOCKDSP=1" >> $GITHUB_ENV
     - name: Run test_tiny on DSP
       run: DEBUG=2 DSP=1 python test/test_tiny.py
     - name: Test transcendentals

tinygrad/runtime/ops_dsp.py

@@ -130,7 +130,9 @@ class ClangCompiler(Compiler):
 class DSPDevice(Compiled):
   def __init__(self, device:str=""):
     compiler_args = ["--target=hexagon", "-mcpu=hexagonv65", "-fuse-ld=lld", "-nostdlib",  "-mhvx=v65", "-mhvx-length=128b"]
-    try:
+    if getenv("MOCKDSP"):
+      super().__init__(device, MallocAllocator, MockDSPRenderer(), ClangCompiler(None, ["-static"] + compiler_args, 'llvm-objdump'), MockDSPProgram)
+    else:
       self.ion_fd = os.open('/dev/ion', os.O_RDONLY)
       # Generate link script to pass into clang. Aligning all used sections to 4k fixes invoke problem.
       sections = ['text', 'rela.plt', 'rela.dyn', 'plt', 'data', 'bss', 'hash', 'dynamic',
@@ -150,8 +152,6 @@ class DSPDevice(Compiled):
 
       self.init_dsp()
       RPCListener(self).start()
-    except FileNotFoundError:
-      super().__init__(device, MallocAllocator, MockDSPRenderer(), ClangCompiler(None, ["-static"] + compiler_args, 'llvm-objdump'), MockDSPProgram)
 
   def open_lib(self, lib):
     self.binded_lib, self.binded_lib_off = lib, 0