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drm/simple_kms_helper: add drmm_simple_encoder_alloc()

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Add an alternative to drm_simple_encoder_init() that allocates and
initializes a simple encoder and registers drm_encoder_cleanup() with
drmm_add_action_or_reset().

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Philipp Zabel 2020-12-10 16:38:29 +01:00
parent ca5092d04d
commit 59abba48c4
2 changed files with 36 additions and 2 deletions
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14
drivers/gpu/drm/drm_simple_kms_helper.c
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@ -9,6 +9,7 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_managed.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
@ -55,8 +56,9 @@ static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
* stored in the device structure. Free the encoder's memory as part of
* the device release function.
*
* FIXME: Later improvements to DRM's resource management may allow for
* an automated kfree() of the encoder's memory.
* Note: consider using drmm_simple_encoder_alloc() instead of
* drm_simple_encoder_init() to let the DRM managed resource infrastructure
* take care of cleanup and deallocation.
*
* Returns:
* Zero on success, error code on failure.
@ -71,6 +73,14 @@ int drm_simple_encoder_init(struct drm_device *dev,
}
EXPORT_SYMBOL(drm_simple_encoder_init);
void *__drmm_simple_encoder_alloc(struct drm_device *dev, size_t size,
size_t offset, int encoder_type)
{
return __drmm_encoder_alloc(dev, size, offset, NULL, encoder_type,
NULL);
}
EXPORT_SYMBOL(__drmm_simple_encoder_alloc);
static enum drm_mode_status
drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
const struct drm_display_mode *mode)

24
include/drm/drm_simple_kms_helper.h
View File

@ -185,4 +185,28 @@ int drm_simple_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
int encoder_type);
void *__drmm_simple_encoder_alloc(struct drm_device *dev, size_t size,
size_t offset, int encoder_type);
/**
* drmm_simple_encoder_alloc - Allocate and initialize an encoder with basic
* functionality.
* @dev: drm device
* @type: the type of the struct which contains struct &drm_encoder
* @member: the name of the &drm_encoder within @type.
* @encoder_type: user visible type of the encoder
*
* Allocates and initializes an encoder that has no further functionality.
* Settings for possible CRTC and clones are left to their initial values.
* Cleanup is automatically handled through registering drm_encoder_cleanup()
* with drmm_add_action().
*
* Returns:
* Pointer to new encoder, or ERR_PTR on failure.
*/
#define drmm_simple_encoder_alloc(dev, type, member, encoder_type) \
((type *)__drmm_simple_encoder_alloc(dev, sizeof(type), \
offsetof(type, member), \
encoder_type))
#endif /* __LINUX_DRM_SIMPLE_KMS_HELPER_H */