initial seed: retrofit campaign lineage from local working trees

panvk-bifrost campaigns (r1..r4 Vulkan compositor + r5.video1 Vulkan
video decode) shipped before this repo existed; the deliverable
patches live in marfrit-packages, but the reasoning chain, phase docs,
and source-state evidence lived only in local working trees on the
development host.

This retrofit imports:
- mesa-panvk-bifrost/   — r1..r4 era phase docs (iter1..iter18)
                          (libmali stub blobs at iter18/blob/ excluded
                          — 109MB of RE artifacts replaced with a README
                          pointer)
- mesa-panvk-bifrost-video/ — sibling campaign phase docs + probe
- evidence/             — frozen .tgz source snapshots at each milestone
                          (basis for the 0005 patch diff generation)

Future iterations should branch off here from day one, so each iter is
a commit rather than a snapshot. See [[feedback-session-local-process-pins]]
for the process drift this retrofit closes.

Total: 1.9 MB across 124 files.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

mesa-panvk-bifrost/phase0_evidence/iter1_compute_probe_run.txt

@@ -0,0 +1,83 @@
+iter1 minimal compute probe — captured 2026-05-19 on ohm
+(PineTab2 v2.0, RK3566, Mali-G52 r1 MC1, Mesa 26.0.6, kernel 7.0.0-danctnix1-6)
+
+Source: panvk-bifrost/iter1/{probe_compute.c, probe_compute.comp, Makefile}
+Deployed to: /tmp/panvk-iter1/
+Build: clean (no warnings with -Wall -Wextra)
+Binary: 260592 bytes
+SPV:    560 bytes
+
+===== RUN #1 (no validation layer) =====
+$ PAN_I_WANT_A_BROKEN_VULKAN_DRIVER=1 ./probe_compute
+
+[step] vkCreateInstance
+[step] vkEnumeratePhysicalDevices
+WARNING: panvk is not a conformant Vulkan implementation, testing use only.
+[info] gpu='Mali-G52 r1 MC1' apiVersion=1.0.335 driverVersion=109051910
+[step] vkGetPhysicalDeviceQueueFamilyProperties
+[info] using queue family 0 (flags=0x7)
+[step] vkCreateDevice
+[step] vkCreateBuffer (storage, host-visible)
+[info] buffer memReq size=64 alignment=64 typeBits=0x7
+[step] vkAllocateMemory
+[step] vkMapMemory (pre-write 0xDEADBEEF sentinel)
+[step] vkCreateDescriptorSetLayout
+[step] vkCreateDescriptorPool
+[step] vkAllocateDescriptorSets
+[step] vkUpdateDescriptorSets
+[step] vkCreateShaderModule (from probe_compute.spv)
+[step] vkCreatePipelineLayout
+[step] vkCreateComputePipelines
+[step] vkCreateCommandPool
+[step] vkAllocateCommandBuffers
+[step] vkBeginCommandBuffer + record dispatch
+[step] vkCreateFence
+[step] vkQueueSubmit
+[step] vkWaitForFences (5s timeout)
+[step] vkInvalidateMappedMemoryRanges + readback
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+===== RC=0 =====
+
+===== RUN #2 (VK_LAYER_KHRONOS_validation enabled) =====
+$ PAN_I_WANT_A_BROKEN_VULKAN_DRIVER=1 \
+  VK_INSTANCE_LAYERS=VK_LAYER_KHRONOS_validation ./probe_compute
+
+[same step trace as above]
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+===== RC=0 =====
+
+No validation-layer warnings or errors emitted. (vkCreateInstance succeeded
+with the layer string in VK_INSTANCE_LAYERS, which implies the loader found
+and activated the layer; otherwise it would return VK_ERROR_LAYER_NOT_PRESENT.)
+
+===== STABILITY: 5 consecutive reruns =====
+$ for i in 1 2 3 4 5; do PAN_I_WANT_A_BROKEN_VULKAN_DRIVER=1 ./probe_compute; done
+
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+[info] buffer[0] = 0xcafebabe (expected 0xcafebabe)
+[PASS] PanVk-Bifrost compute dispatch wrote the expected pattern.
+
+6/6 runs PASS.
+
+===== DMESG (panfrost-related, full boot tail) =====
+[    5.331157] panfrost fde60000.gpu: clock rate = 594000000
+[    5.331201] panfrost fde60000.gpu: bus_clock rate = 500000000
+[    5.336259] panfrost fde60000.gpu: [drm:panfrost_devfreq_init [panfrost]] Failed to register cooling device
+[    5.336430] panfrost fde60000.gpu: mali-g52 id 0x7402 major 0x1 minor 0x0 status 0x0
+[    5.336443] panfrost fde60000.gpu: features: 00000000,00000df7, issues: 00000000,00000400
+[    5.336450] panfrost fde60000.gpu: Features: L2:0x07110206 Shader:0x00000002 Tiler:0x00000209 Mem:0x1 MMU:0x00002823 AS:0xff JS:0x7
+[    5.336458] panfrost fde60000.gpu: shader_present=0x1 l2_present=0x1
+[    5.344566] panfrost fde60000.gpu: [drm] Using Transparent Hugepage
+[    5.347277] [drm] Initialized panfrost 1.6.0 for fde60000.gpu on minor 1
+
+No GPU faults, no MMU faults, no kernel-side panfrost warnings after running
+the probe 6 times.