// SPDX-License-Identifier: GPL-2.0
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_kunit_helpers.h>
#include <drm/drm_managed.h>
#include <kunit/device.h>
#include <kunit/resource.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#define KUNIT_DEVICE_NAME "drm-kunit-mock-device"
static const struct drm_mode_config_funcs drm_mode_config_funcs = {
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
/**
* drm_kunit_helper_alloc_device - Allocate a mock device for a KUnit test
* @ test : The test context object
*
* This allocates a fake struct & device to create a mock for a KUnit
* test . The device will also be bound to a fake driver . It will thus be
* able to leverage the usual infrastructure and most notably the
* device - managed resources just like a " real " device .
*
* Resources will be cleaned up automatically , but the removal can be
* forced using @ drm_kunit_helper_free_device .
*
* Returns :
* A pointer to the new device , or an ERR_PTR ( ) otherwise .
*/
struct device *drm_kunit_helper_alloc_device(struct kunit *test)
{
return kunit_device_register(test, KUNIT_DEVICE_NAME);
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_alloc_device);
/**
* drm_kunit_helper_free_device - Frees a mock device
* @ test : The test context object
* @ dev : The device to free
*
* Frees a device allocated with drm_kunit_helper_alloc_device ( ) .
*/
void drm_kunit_helper_free_device(struct kunit *test, struct device *dev)
{
kunit_device_unregister(test, dev);
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_free_device);
struct drm_device *
__drm_kunit_helper_alloc_drm_device_with_driver(struct kunit *test,
struct device *dev,
size_t size, size_t offset,
const struct drm_driver *driver)
{
struct drm_device *drm;
void *container;
int ret;
container = __devm_drm_dev_alloc(dev, driver, size, offset);
if (IS_ERR(container))
return ERR_CAST(container);
drm = container + offset;
drm->mode_config.funcs = &drm_mode_config_funcs;
ret = drmm_mode_config_init(drm);
if (ret)
return ERR_PTR(ret);
return drm;
}
EXPORT_SYMBOL_GPL(__drm_kunit_helper_alloc_drm_device_with_driver);
static void kunit_action_drm_atomic_state_put(void *ptr)
{
struct drm_atomic_state *state = ptr;
drm_atomic_state_put(state);
}
/**
* drm_kunit_helper_atomic_state_alloc - Allocates an atomic state
* @ test : The test context object
* @ drm : The device to alloc the state for
* @ ctx : Locking context for that atomic update
*
* Allocates a empty atomic state .
*
* The state is tied to the kunit test context , so we must not call
* drm_atomic_state_put ( ) on it , it will be done so automatically .
*
* Returns :
* An ERR_PTR on error , a pointer to the newly allocated state otherwise
*/
struct drm_atomic_state *
drm_kunit_helper_atomic_state_alloc(struct kunit *test,
struct drm_device *drm,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_atomic_state *state;
int ret;
state = drm_atomic_state_alloc(drm);
if (!state)
return ERR_PTR(-ENOMEM);
ret = kunit_add_action_or_reset(test,
kunit_action_drm_atomic_state_put,
state);
if (ret)
return ERR_PTR(ret);
state->acquire_ctx = ctx;
return state;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_atomic_state_alloc);
static const uint32_t default_plane_formats[] = {
DRM_FORMAT_XRGB8888,
};
static const uint64_t default_plane_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
};
static const struct drm_plane_helper_funcs default_plane_helper_funcs = {
};
static const struct drm_plane_funcs default_plane_funcs = {
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.reset = drm_atomic_helper_plane_reset,
};
/**
* drm_kunit_helper_create_primary_plane - Creates a mock primary plane for a KUnit test
* @ test : The test context object
* @ drm : The device to alloc the plane for
* @ funcs : Callbacks for the new plane . Optional .
* @ helper_funcs : Helpers callbacks for the new plane . Optional .
* @ formats : array of supported formats ( DRM_FORMAT \ _ \ * ) . Optional .
* @ num_formats : number of elements in @ formats
* @ modifiers : array of struct drm_format modifiers terminated by
* DRM_FORMAT_MOD_INVALID . Optional .
*
* This allocates and initializes a mock struct & drm_plane meant to be
* part of a mock device for a KUnit test .
*
* Resources will be cleaned up automatically .
*
* @ funcs will default to the default helpers implementations .
* @ helper_funcs will default to an empty implementation . @ formats will
* default to XRGB8888 only . @ modifiers will default to a linear
* modifier only .
*
* Returns :
* A pointer to the new plane , or an ERR_PTR ( ) otherwise .
*/
struct drm_plane *
drm_kunit_helper_create_primary_plane(struct kunit *test,
struct drm_device *drm,
const struct drm_plane_funcs *funcs,
const struct drm_plane_helper_funcs *helper_funcs,
const uint32_t *formats,
unsigned int num_formats,
const uint64_t *modifiers)
{
struct drm_plane *plane;
if (!funcs)
funcs = &default_plane_funcs;
if (!helper_funcs)
helper_funcs = &default_plane_helper_funcs;
if (!formats || !num_formats) {
formats = default_plane_formats;
num_formats = ARRAY_SIZE(default_plane_formats);
}
if (!modifiers)
modifiers = default_plane_modifiers;
plane = __drmm_universal_plane_alloc(drm,
sizeof (struct drm_plane), 0 ,
0 ,
funcs,
formats,
num_formats,
default_plane_modifiers,
DRM_PLANE_TYPE_PRIMARY,
NULL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, plane);
drm_plane_helper_add(plane, helper_funcs);
return plane;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_create_primary_plane);
static const struct drm_crtc_helper_funcs default_crtc_helper_funcs = {
};
static const struct drm_crtc_funcs default_crtc_funcs = {
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.reset = drm_atomic_helper_crtc_reset,
};
/**
* drm_kunit_helper_create_crtc - Creates a mock CRTC for a KUnit test
* @ test : The test context object
* @ drm : The device to alloc the plane for
* @ primary : Primary plane for CRTC
* @ cursor : Cursor plane for CRTC . Optional .
* @ funcs : Callbacks for the new plane . Optional .
* @ helper_funcs : Helpers callbacks for the new plane . Optional .
*
* This allocates and initializes a mock struct & drm_crtc meant to be
* part of a mock device for a KUnit test .
*
* Resources will be cleaned up automatically .
*
* @ funcs will default to the default helpers implementations .
* @ helper_funcs will default to an empty implementation .
*
* Returns :
* A pointer to the new CRTC , or an ERR_PTR ( ) otherwise .
*/
struct drm_crtc *
drm_kunit_helper_create_crtc(struct kunit *test,
struct drm_device *drm,
struct drm_plane *primary,
struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs,
const struct drm_crtc_helper_funcs *helper_funcs)
{
struct drm_crtc *crtc;
int ret;
if (!funcs)
funcs = &default_crtc_funcs;
if (!helper_funcs)
helper_funcs = &default_crtc_helper_funcs;
crtc = drmm_kzalloc(drm, sizeof (*crtc), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, crtc);
ret = drmm_crtc_init_with_planes(drm, crtc,
primary,
cursor,
funcs,
NULL);
KUNIT_ASSERT_EQ(test, ret, 0 );
drm_crtc_helper_add(crtc, helper_funcs);
return crtc;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_create_crtc);
/**
* drm_kunit_helper_enable_crtc_connector - Enables a CRTC - > Connector output
* @ test : The test context object
* @ drm : The device to alloc the plane for
* @ crtc : The CRTC to enable
* @ connector : The Connector to enable
* @ mode : The display mode to configure the CRTC with
* @ ctx : Locking context
*
* This function creates an atomic update to enable the route from @ crtc
* to @ connector , with the given @ mode .
*
* Returns :
*
* A pointer to the new CRTC , or an ERR_PTR ( ) otherwise . If the error
* returned is EDEADLK , the entire atomic sequence must be restarted .
*/
int drm_kunit_helper_enable_crtc_connector(struct kunit *test,
struct drm_device *drm,
struct drm_crtc *crtc,
struct drm_connector *connector,
const struct drm_display_mode *mode,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_atomic_state *state;
struct drm_connector_state *conn_state;
struct drm_crtc_state *crtc_state;
int ret;
state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
if (IS_ERR(state))
return PTR_ERR(state);
conn_state = drm_atomic_get_connector_state(state, connector);
if (IS_ERR(conn_state))
return PTR_ERR(conn_state);
ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
if (ret)
return ret;
crtc_state = drm_atomic_get_crtc_state(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
if (ret)
return ret;
crtc_state->enable = true ;
crtc_state->active = true ;
ret = drm_atomic_commit(state);
if (ret)
return ret;
return 0 ;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_enable_crtc_connector);
static void kunit_action_drm_mode_destroy(void *ptr)
{
struct drm_display_mode *mode = ptr;
drm_mode_destroy(NULL, mode);
}
/**
* drm_kunit_add_mode_destroy_action ( ) - Add a drm_destroy_mode kunit action
* @ test : The test context object
* @ mode : The drm_display_mode to destroy eventually
*
* Registers a kunit action that will destroy the drm_display_mode at
* the end of the test .
*
* If an error occurs , the drm_display_mode will be destroyed .
*
* Returns :
* 0 on success , an error code otherwise .
*/
int drm_kunit_add_mode_destroy_action(struct kunit *test,
struct drm_display_mode *mode)
{
return kunit_add_action_or_reset(test,
kunit_action_drm_mode_destroy,
mode);
}
EXPORT_SYMBOL_GPL(drm_kunit_add_mode_destroy_action);
/**
* drm_kunit_display_mode_from_cea_vic ( ) - return a mode for CEA VIC for a KUnit test
* @ test : The test context object
* @ dev : DRM device
* @ video_code : CEA VIC of the mode
*
* Creates a new mode matching the specified CEA VIC for a KUnit test .
*
* Resources will be cleaned up automatically .
*
* Returns : A new drm_display_mode on success or NULL on failure
*/
struct drm_display_mode *
drm_kunit_display_mode_from_cea_vic(struct kunit *test, struct drm_device *dev,
u8 video_code)
{
struct drm_display_mode *mode;
int ret;
mode = drm_display_mode_from_cea_vic(dev, video_code);
if (!mode)
return NULL;
ret = kunit_add_action_or_reset(test,
kunit_action_drm_mode_destroy,
mode);
if (ret)
return NULL;
return mode;
}
EXPORT_SYMBOL_GPL(drm_kunit_display_mode_from_cea_vic);
MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>" );
MODULE_DESCRIPTION("KUnit test suite helper functions" );
MODULE_LICENSE("GPL" );
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