// SPDX-License-Identifier: MIT
#include <linux/export.h>
#include <drm/clients/drm_client_setup.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_print.h>
#include "drm_client_internal.h"
static char drm_client_default[16 ] = CONFIG_DRM_CLIENT_DEFAULT;
module_param_string(active, drm_client_default, sizeof (drm_client_default), 0444 );
MODULE_PARM_DESC(active,
"Choose which drm client to start, default is "
CONFIG_DRM_CLIENT_DEFAULT);
/**
* drm_client_setup ( ) - Setup in - kernel DRM clients
* @ dev : DRM device
* @ format : Preferred pixel format for the device . Use NULL , unless
* there is clearly a driver - preferred format .
*
* This function sets up the in - kernel DRM clients . Restore , hotplug
* events and teardown are all taken care of .
*
* Drivers should call drm_client_setup ( ) after registering the new
* DRM device with drm_dev_register ( ) . This function is safe to call
* even when there are no connectors present . Setup will be retried
* on the next hotplug event .
*
* The clients are destroyed by drm_dev_unregister ( ) .
*/
void drm_client_setup(struct drm_device *dev, const struct drm_format_info *format)
{
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
drm_dbg(dev, "driver does not support mode-setting, skipping DRM clients\n" );
return ;
}
#ifdef CONFIG_DRM_FBDEV_EMULATION
if (!strcmp(drm_client_default, "fbdev" )) {
int ret;
ret = drm_fbdev_client_setup(dev, format);
if (ret)
drm_warn(dev, "Failed to set up DRM client; error %d\n" , ret);
return ;
}
#endif
#ifdef CONFIG_DRM_CLIENT_LOG
if (!strcmp(drm_client_default, "log" )) {
drm_log_register(dev);
return ;
}
#endif
if (strcmp(drm_client_default, "" ))
drm_warn(dev, "Unknown DRM client %s\n" , drm_client_default);
}
EXPORT_SYMBOL(drm_client_setup);
/**
* drm_client_setup_with_fourcc ( ) - Setup in - kernel DRM clients for color mode
* @ dev : DRM device
* @ fourcc : Preferred pixel format as 4 CC code for the device
*
* This function sets up the in - kernel DRM clients . It is equivalent
* to drm_client_setup ( ) , but expects a 4 CC code as second argument .
*/
void drm_client_setup_with_fourcc(struct drm_device *dev, u32 fourcc)
{
drm_client_setup(dev, drm_format_info(fourcc));
}
EXPORT_SYMBOL(drm_client_setup_with_fourcc);
/**
* drm_client_setup_with_color_mode ( ) - Setup in - kernel DRM clients for color mode
* @ dev : DRM device
* @ color_mode : Preferred color mode for the device
*
* This function sets up the in - kernel DRM clients . It is equivalent
* to drm_client_setup ( ) , but expects a color mode as second argument .
*
* Do not use this function in new drivers . Prefer drm_client_setup ( ) with a
* format of NULL .
*/
void drm_client_setup_with_color_mode(struct drm_device *dev, unsigned int color_mode)
{
u32 fourcc = drm_driver_color_mode_format(dev, color_mode);
drm_client_setup_with_fourcc(dev, fourcc);
}
EXPORT_SYMBOL(drm_client_setup_with_color_mode);
MODULE_DESCRIPTION("In-kernel DRM clients" );
MODULE_LICENSE("GPL and additional rights" );
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