George Hotz | Programming | writing a Qualcomm GPU driver | Freedreno | Mesa for compute | part 2

Date of the stream 16 Dec 2023. from $1250 buy https://comma.ai/shop/comma-3x & best ADAS system in the world https://openpilot.comma.ai Live-stream chat added as Subtitles/CC - English (Twitch Chat) - at the bottom - Show Transcript Sources: - https://github.com/tinygrad tinygrad bounties: - https://docs.google.com/spreadsheets/d/1WKHbT-7KOgjEawq5h5Ic1qUWzpfAzuD_J06N1JwOCGs/ Hardware: - Plugable BT-KEY3 - Samsung Galaxy Z Fold5 Follow for notifications: - https://twitch.tv/georgehotz Support George: - https://twitch.tv/subs/georgehotz Pre-order tinybox: - https://buy.stripe.com/5kAaGL6lk9uX9nW144 (https://tinygrad.org/) Chapters: 00:00:00 intro 00:01:02 writing a GPU driver 00:01:54 ssh to the phone, code server, vs code server 00:02:22 user space GPU driver, graphics kernel 00:05:10 asking Quentin, Perplexity 00:13:00 regex pattern allow spaces 00:21:30 parsing struct 00:25:45 GPU driver, how long in C 00:31:05 tinygrad import Tensor 00:35:40 init, GPU not controlled in kernel space, single layer pointers 00:36:55 replay this GPU command 00:38:10 TinyJit, tinygrad prints 00:44:30 kgsl_gpu_command, msm_kgsl.py 00:49:10 Galaxy Z Fold5 00:49:45 who knows that green is executable +x 00:50:18 linux dma-fence.h 00:53:00 offset gpuaddr size flags id 00:58:20 struct_kgsl_command_object 01:06:25 building a driver before building a chip 01:07:00 jobs creation, comma lesson 01:08:25 thneed openpilot, mmap64 01:12:30 gpu command, parsing the command buffer 01:19:45 freedreno driver, freedreno cffdump 01:23:05 Perplexity hallucinating 01:25:40 rnndb database 404 link 01:28:25 real command buffer 01:31:00 PM4 01:35:20 pkt_is_type7 01:41:44 alloc memoryview writable 01:46:55 type 7 and type 4 packets 01:48:40 very cool freedreno people 01:49:05 qualcomm switching to opensource driver 01:50:00 writing registers, opcode 01:52:40 number of globals, and total number 01:54:40 adreno_pm4_type3,7_packets, 7 commands, 4 write registers 01:56:50 python format string add 0x to hex 01:57