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drm/connector: Introduce an HDMI connector initialization function

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A lot of the various HDMI drivers duplicate some logic that depends on
the HDMI spec itself and not really a particular hardware
implementation.

Output BPC or format selection, infoframe generation are good examples
of such areas.

This creates a lot of boilerplate, with a lot of variations, which makes
it hard for userspace to rely on, and makes it difficult to get it right
for drivers.

In the next patches, we'll add a lot of infrastructure around the
drm_connector and drm_connector_state structures, which will allow to
abstract away the duplicated logic. This infrastructure comes with a few
requirements though, and thus we need a new initialization function.

Hopefully, this will make drivers simpler to handle, and their behaviour
more consistent.

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-v15-1-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard
2024-05-27 15:57:50 +02:00
parent 40f98db5c0
commit 582d79f343
2 changed files with 44 additions and 0 deletions
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39
drivers/gpu/drm/drm_connector.c
View File

@@ -452,6 +452,45 @@ int drmm_connector_init(struct drm_device *dev,
}
EXPORT_SYMBOL(drmm_connector_init);
/**
* drmm_connector_hdmi_init - Init a preallocated HDMI connector
* @dev: DRM device
* @connector: A pointer to the HDMI connector to init
* @funcs: callbacks for this connector
* @connector_type: user visible type of the connector
* @ddc: optional pointer to the associated ddc adapter
*
* Initialises a preallocated HDMI connector. Connectors can be
* subclassed as part of driver connector objects.
*
* Cleanup is automatically handled with a call to
* drm_connector_cleanup() in a DRM-managed action.
*
* The connector structure should be allocated with drmm_kzalloc().
*
* Returns:
* Zero on success, error code on failure.
*/
int drmm_connector_hdmi_init(struct drm_device *dev,
struct drm_connector *connector,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc)
{
int ret;
if (!(connector_type == DRM_MODE_CONNECTOR_HDMIA ||
connector_type == DRM_MODE_CONNECTOR_HDMIB))
return -EINVAL;
ret = drmm_connector_init(dev, connector, funcs, connector_type, ddc);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL(drmm_connector_hdmi_init);
/**
* drm_connector_attach_edid_property - attach edid property.
* @connector: the connector

5
include/drm/drm_connector.h
View File

@@ -1908,6 +1908,11 @@ int drmm_connector_init(struct drm_device *dev,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc);
int drmm_connector_hdmi_init(struct drm_device *dev,
struct drm_connector *connector,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc);
void drm_connector_attach_edid_property(struct drm_connector *connector);
int drm_connector_register(struct drm_connector *connector);
void drm_connector_unregister(struct drm_connector *connector);