[finger563]

Summary

tab5-emu's 64 KB video conversion tile needs one contiguous block of internal RAM. It was allocated in initialize_video(), after the BSP had already set up the display, audio DMA and USB.

With espp #738's proposed rotation tile (16–32 KB of internal RAM in the BSP), no 64 KB block was left. The tile then fell back to PSRAM (No internal RAM for the 65536 byte video tile; using PSRAM), which slows every game's video path.

initialize_tab5() now allocates the tile first. The call in initialize_video() stays and does nothing once the tile exists.

Testing

• On the Tab5 with espp #738 plus the rotation tile (16 KB): the tile is in internal RAM again and the fallback warning is gone.
• With the current espp BSP, the change has no effect: the 64 KB block was always available, just later.

🤖 Generated with Claude Code

[github-actions]

ESP-IDF Size Report for 'Tab5 Emu'

Metric	Base	PR	Delta
FLASH	0 bytes (0.00%)	0 bytes (0.00%)	0 bytes (0.00%)
DRAM	266,590 bytes (60.41%)	266,590 bytes (60.41%)	0 bytes (0.00%)
IRAM	0 bytes	0 bytes	0 bytes
RAM (DRAM+IRAM)	266,590 bytes	266,590 bytes	0 bytes (0.00%)

_{FLASH uses app .bin size or json2 flash sum. RAM sums DRAM+IRAM via idf_size. Percentages shown when totals are available.
DRAM/IRAM usage does not include memory used by the heap allocator at runtime.
This report was generated by esp-idf-size-delta.}