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// SPDX-License-Identifier: MIT
#include <drm/drm_atomic.h>
#include <drm/drm_connector.h>
#include <drm/display/drm_hdmi_state_helper.h>
/**
* __drm_atomic_helper_connector_hdmi_reset() - Initializes all HDMI @drm_connector_state resources
* @connector: DRM connector
* @new_conn_state: connector state to reset
*
* Initializes all HDMI resources from a @drm_connector_state without
* actually allocating it. This is useful for HDMI drivers, in
* combination with __drm_atomic_helper_connector_reset() or
* drm_atomic_helper_connector_reset().
*/
void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
struct drm_connector_state *new_conn_state)
{
unsigned int max_bpc = connector->max_bpc;
new_conn_state->max_bpc = max_bpc;
new_conn_state->max_requested_bpc = max_bpc;
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_hdmi_reset);
/**
* drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state
* @connector: DRM Connector
* @state: the DRM State object
*
* Provides a default connector state check handler for HDMI connectors.
* Checks that a desired connector update is valid, and updates various
* fields of derived state.
*
* RETURNS:
* Zero on success, or an errno code otherwise.
*/
int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
struct drm_atomic_state *state)
{
struct drm_connector_state *old_conn_state =
drm_atomic_get_old_connector_state(state, connector);
struct drm_connector_state *new_conn_state =
drm_atomic_get_new_connector_state(state, connector);
if (old_conn_state->hdmi.output_bpc != new_conn_state->hdmi.output_bpc) {
struct drm_crtc *crtc = new_conn_state->crtc;
struct drm_crtc_state *crtc_state;
crtc_state = drm_atomic_get_crtc_state(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
crtc_state->mode_changed = true;
}
return 0;
}
EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_check);
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