drm/connector: hdmi: Create an HDMI sub-state

The next features we will need to share across drivers will need to
store some parameters for drivers to use, such as the selected output
format.

Let's create a new connector sub-state dedicated to HDMI controllers,
that will eventually store everything we need.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-3-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard 2024-05-27 15:57:52 +02:00
parent 68aaa74da5
commit 54cb39e229
No known key found for this signature in database
GPG Key ID: 275FCE19A23DBE76
5 changed files with 73 additions and 0 deletions

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@ -70,3 +70,10 @@ config DRM_DISPLAY_HDMI_HELPER
depends on DRM_DISPLAY_HELPER
help
DRM display helpers for HDMI.
config DRM_DISPLAY_HDMI_STATE_HELPER
bool
depends on DRM_DISPLAY_HELPER
depends on DRM_DISPLAY_HDMI_HELPER
help
DRM KMS state helpers for HDMI.

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@ -14,6 +14,8 @@ drm_display_helper-$(CONFIG_DRM_DISPLAY_HDCP_HELPER) += drm_hdcp_helper.o
drm_display_helper-$(CONFIG_DRM_DISPLAY_HDMI_HELPER) += \
drm_hdmi_helper.o \
drm_scdc_helper.o
drm_display_helper-$(CONFIG_DRM_DISPLAY_HDMI_STATE_HELPER) += \
drm_hdmi_state_helper.o
drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_AUX_CEC) += drm_dp_cec.o

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@ -0,0 +1,41 @@
// 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)
{
}
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)
{
return 0;
}
EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_check);

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@ -0,0 +1,16 @@
/* SPDX-License-Identifier: MIT */
#ifndef DRM_HDMI_STATE_HELPER_H_
#define DRM_HDMI_STATE_HELPER_H_
struct drm_atomic_state;
struct drm_connector;
struct drm_connector_state;
void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
struct drm_connector_state *new_conn_state);
int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
struct drm_atomic_state *state);
#endif // DRM_HDMI_STATE_HELPER_H_

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@ -1031,6 +1031,13 @@ struct drm_connector_state {
* DRM blob property for HDR output metadata
*/
struct drm_property_blob *hdr_output_metadata;
/**
* @hdmi: HDMI-related variable and properties. Filled by
* @drm_atomic_helper_connector_hdmi_check().
*/
struct {
} hdmi;
};
/**