Allocate intel_ddi_buf_trans buffer per port if requested. Request is considered invalid if .use_vbt_vswing field is unset and VBT version is less than 218. Do not allocate buffer if not requested or request is invalid.
Deallocate buffer for each requesting port on driver removal. v2->v3 - change kzalloc() into kzalloc_obj() - remove null pointer check before kfree() Signed-off-by: Michał Grzelak <[email protected]> --- drivers/gpu/drm/i915/display/intel_bios.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index a3f0334c3a582..fa9f21c5c6134 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2659,7 +2659,15 @@ static void sanitize_hdmi_level_shift(struct intel_bios_encoder_data *devdata, static void override_vswing_preemph(struct intel_bios_encoder_data *devdata) { + struct intel_ddi_buf_trans *buf_trans; + devdata->buf_trans = NULL; + + if (devdata->display->vbt.version < 218 || !devdata->child.use_vbt_vswing) + return; + + buf_trans = kzalloc_obj(*buf_trans); + devdata->buf_trans = buf_trans; } static bool @@ -3398,6 +3406,8 @@ void intel_bios_driver_remove(struct intel_display *display) node) { list_del(&devdata->node); kfree(devdata->dsc); + kfree(devdata->buf_trans); + kfree(devdata); } -- 2.45.2
