[PATCH v1 0/4] staging: fbtft: reduce stack usage by avoiding large write_reg() varargs

[Sun Jian <sun.jian.kdev@gmail.com>]

Hi,

This series fixes clang `-Wframe-larger-than=1024` warnings in the fbtft
staging drivers.

The warnings are triggered by very large `write_reg()`/`write_register()`
varargs calls, which result in excessive stack usage.

Switch the affected paths to send a u8 command byte followed by the u8
payload using `fbtft_write_buf_dc()`. The register values and ordering are
kept unchanged; only the transfer method is updated.

Patches:
  1/4 staging: fbtft: core: avoid large stack usage in DT init parsing
  2/4 staging: fbtft: ssd1351: send gamma table via fbtft_write_buf_dc()
  3/4 staging: fbtft: ssd1331: send gamma table via fbtft_write_buf_dc()
  4/4 staging: fbtft: hx8353d: send LUT via buffer to reduce stack usage

Thanks,
Sun Jian

--
Sun Jian (4):
  staging: fbtft: core: avoid large stack usage in DT init parsing
  staging: fbtft: ssd1351: send gamma table via fbtft_write_buf_dc()
  staging: fbtft: ssd1331: send gamma table via fbtft_write_buf_dc()
  staging: fbtft: hx8353d: send LUT via buffer to reduce stack usage

 drivers/staging/fbtft/fb_hx8353d.c | 38 ++++++++++++++++++++++--------
 drivers/staging/fbtft/fb_ssd1331.c | 29 ++++++++++++-----------
 drivers/staging/fbtft/fb_ssd1351.c | 35 ++++++++++++---------------
 drivers/staging/fbtft/fbtft-core.c | 32 ++++++++++---------------
 4 files changed, 71 insertions(+), 63 deletions(-)

-- 
2.43.0