acquire_i2c_hw_engine() opens the DDC pins before setting up the hardware engine. If setup_engine() fails, the error path releases the engine but leaves the DDC pins open and the engine's DDC pointer set.
Subsequent attempts to open the pins then return GPIO_RESULT_ALREADY_OPENED, preventing further I2C transfers, EDID reads and hotplug detection on that port until reboot. Mirror the normal teardown path by closing the DDC pins and clearing the pointer after releasing the engine. Assisted-by: Codex:gpt-5 Signed-off-by: NepNep7601 <[email protected]> --- drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c index 05892ab4529f..e7a05494abab 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c @@ -485,6 +485,8 @@ struct dce_i2c_hw *acquire_i2c_hw_engine( if (!setup_engine(dce_i2c_hw)) { release_engine(dce_i2c_hw); + dal_ddc_close(dce_i2c_hw->ddc); + dce_i2c_hw->ddc = NULL; return NULL; } -- 2.47.3
