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drm: writeback: Create drmm variants for drm_writeback_connector initialization

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To allows driver to only use drmm objects, add helper to create
drm_writeback_connectors with automated lifetime management.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250116-google-vkms-managed-v9-7-3e4ae1bd05a0@bootlin.com
Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
This commit is contained in:
Louis Chauvet 2025-01-16 18:47:19 +01:00
parent 2f3f4a7363
commit 1914ba2b91
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GPG key ID: 20AD2EC65B102CE2
2 changed files with 80 additions and 0 deletions
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74
drivers/gpu/drm/drm_writeback.c
View file

@ -340,6 +340,80 @@ int drm_writeback_connector_init_with_encoder(struct drm_device *dev,
}
EXPORT_SYMBOL(drm_writeback_connector_init_with_encoder);
/**
* drm_writeback_connector_cleanup - Cleanup the writeback connector
* @dev: DRM device
* @wb_connector: Pointer to the writeback connector to clean up
*
* This will decrement the reference counter of blobs and destroy properties. It
* will also clean the remaining jobs in this writeback connector. Caution: This helper will not
* clean up the attached encoder and the drm_connector.
*/
static void drm_writeback_connector_cleanup(struct drm_device *dev,
struct drm_writeback_connector *wb_connector)
{
unsigned long flags;
struct drm_writeback_job *pos, *n;
delete_writeback_properties(dev);
drm_property_blob_put(wb_connector->pixel_formats_blob_ptr);
spin_lock_irqsave(&wb_connector->job_lock, flags);
list_for_each_entry_safe(pos, n, &wb_connector->job_queue, list_entry) {
drm_writeback_cleanup_job(pos);
list_del(&pos->list_entry);
}
spin_unlock_irqrestore(&wb_connector->job_lock, flags);
}
/**
* drmm_writeback_connector_init - Initialize a writeback connector with
* a custom encoder
*
* @dev: DRM device
* @wb_connector: Writeback connector to initialize
* @con_funcs: Connector funcs vtable
* @enc: Encoder to connect this writeback connector
* @formats: Array of supported pixel formats for the writeback engine
* @n_formats: Length of the formats array
*
* This function initialize a writeback connector and register its cleanup.
*
* This function creates the writeback-connector-specific properties if they
* have not been already created, initializes the connector as
* type DRM_MODE_CONNECTOR_WRITEBACK, and correctly initializes the property
* values.
*
* Returns: 0 on success, or a negative error code
*/
int drmm_writeback_connector_init(struct drm_device *dev,
struct drm_writeback_connector *wb_connector,
const struct drm_connector_funcs *con_funcs,
struct drm_encoder *enc,
const u32 *formats, int n_formats)
{
struct drm_connector *connector = &wb_connector->base;
int ret;
ret = drmm_connector_init(dev, connector, con_funcs,
DRM_MODE_CONNECTOR_WRITEBACK, NULL);
if (ret)
return ret;
ret = __drm_writeback_connector_init(dev, wb_connector, enc, formats,
n_formats);
if (ret)
return ret;
ret = drmm_add_action_or_reset(dev, (void *)drm_writeback_connector_cleanup,
wb_connector);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL(drmm_writeback_connector_init);
int drm_writeback_set_fb(struct drm_connector_state *conn_state,
struct drm_framebuffer *fb)
{

6
include/drm/drm_writeback.h
View file

@ -161,6 +161,12 @@ int drm_writeback_connector_init_with_encoder(struct drm_device *dev,
const struct drm_connector_funcs *con_funcs, const u32 *formats,
int n_formats);
int drmm_writeback_connector_init(struct drm_device *dev,
struct drm_writeback_connector *wb_connector,
const struct drm_connector_funcs *con_funcs,
struct drm_encoder *enc,
const u32 *formats, int n_formats);
int drm_writeback_set_fb(struct drm_connector_state *conn_state,
struct drm_framebuffer *fb);