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dadd28d414
Add drm_client_lib.ko to contain DRM's built-in client. Move the existing client for fbdev emulation into the new module. Protect the new module behind CONFIG_DRM_CLIENT_LIB. The Kconfig rules separate the DRM drivers from the DRM clients. A driver can opt into the default clients, but the user configures each client individually. To do so, DRM drivers still select DRM_CLIENT_SELECTION. The option is now a tristate that further selects all dependencies of the enabled DRM clients. There's a menu option for each client. Enabling at least one client also selects DRM_CLIENT_SETUP, so that drivers call drm_client_setup(). New DRM clients should depend on DRM_CLIENT_SELECTION. There are existing kernel options in drm_fb_helper.o, so leave this file in the KMS-helper module for now. v5: - leave fbdev helpers in drm_kms_helper.ko for now v3: - fix commit changelog v2: - keep client code in core - protect lib with DRM_CLIENT_LIB - remove duplicate line from Makefile (Jocelyn) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241014085740.582287-13-tzimmermann@suse.de
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
// SPDX-License-Identifier: MIT
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#include <drm/drm_client_setup.h>
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#include <drm/drm_device.h>
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#include <drm/drm_fbdev_client.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_print.h>
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/**
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* drm_client_setup() - Setup in-kernel DRM clients
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* @dev: DRM device
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* @format: Preferred pixel format for the device. Use NULL, unless
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* there is clearly a driver-preferred format.
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*
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* This function sets up the in-kernel DRM clients. Restore, hotplug
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* events and teardown are all taken care of.
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*
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* Drivers should call drm_client_setup() after registering the new
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* DRM device with drm_dev_register(). This function is safe to call
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* even when there are no connectors present. Setup will be retried
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* on the next hotplug event.
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*
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* The clients are destroyed by drm_dev_unregister().
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*/
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void drm_client_setup(struct drm_device *dev, const struct drm_format_info *format)
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{
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int ret;
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ret = drm_fbdev_client_setup(dev, format);
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if (ret)
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drm_warn(dev, "Failed to set up DRM client; error %d\n", ret);
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}
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EXPORT_SYMBOL(drm_client_setup);
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/**
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* drm_client_setup_with_fourcc() - Setup in-kernel DRM clients for color mode
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* @dev: DRM device
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* @fourcc: Preferred pixel format as 4CC code for the device
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*
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* This function sets up the in-kernel DRM clients. It is equivalent
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* to drm_client_setup(), but expects a 4CC code as second argument.
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*/
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void drm_client_setup_with_fourcc(struct drm_device *dev, u32 fourcc)
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{
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drm_client_setup(dev, drm_format_info(fourcc));
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}
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EXPORT_SYMBOL(drm_client_setup_with_fourcc);
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/**
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* drm_client_setup_with_color_mode() - Setup in-kernel DRM clients for color mode
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* @dev: DRM device
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* @color_mode: Preferred color mode for the device
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*
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* This function sets up the in-kernel DRM clients. It is equivalent
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* to drm_client_setup(), but expects a color mode as second argument.
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*
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* Do not use this function in new drivers. Prefer drm_client_setup() with a
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* format of NULL.
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*/
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void drm_client_setup_with_color_mode(struct drm_device *dev, unsigned int color_mode)
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{
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u32 fourcc = drm_driver_color_mode_format(dev, color_mode);
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drm_client_setup_with_fourcc(dev, fourcc);
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}
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EXPORT_SYMBOL(drm_client_setup_with_color_mode);
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MODULE_DESCRIPTION("In-kernel DRM clients");
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MODULE_LICENSE("GPL and additional rights");
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