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| author | Troy Mitchell <troy.mitchell@linux.spacemit.com> | 2025-09-25 10:02:27 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2025-09-25 23:48:58 +0200 |
| commit | 11f40684ccd84e792eced110f0a5d3d6adbdf90d (patch) | |
| tree | e20c39a14b5066abd464faf9b7de55937e1b0a34 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | 445522fe7aad6131b2747ae8c76f77266054cd84 (diff) | |
i2c: spacemit: disable SDA glitch fix to avoid restart delay
The K1 I2C controller has an SDA glitch fix that introduces a small
delay on restart signals. While this feature can suppress glitches
on SDA when SCL = 0, it also delays the restart signal, which may
cause unexpected behavior in some transfers.
The glitch itself does not affect normal I2C operation, because
the I2C specification allows SDA to change while SCL is low.
To ensure correct transmission for every message, we disable the
SDA glitch fix by setting the RCR.SDA_GLITCH_NOFIX bit during
initialization.
This guarantees that restarts are issued promptly without
unintended delays.
Fixes: 5ea558473fa31 ("i2c: spacemit: add support for SpacemiT K1 SoC")
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions