linux-stable.git/drivers/gpu/drm/drm_client_setup.c, branch linux-6.13.y Linux kernel stable tree drm/client: Add client-lib module 2024-10-18T07:25:51+00:00 Thomas Zimmermann tzimmermann@suse.de 2024-10-14T08:55:26+00:00 dadd28d4142f9ad39eefb7b45ee7518bd4d2459c 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 
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
drm: Add client-agnostic setup helper 2024-09-26T06:27:52+00:00 Thomas Zimmermann tzimmermann@suse.de 2024-09-24T07:12:02+00:00 d07fdf9225922d3e36ebd13ccab3df62b1ccdab3 DRM may support multiple in-kernel clients that run as soon as a DRM driver has been registered. To select the client(s) in a single place, introduce drm_client_setup(). Drivers that call the new helper automatically instantiate the kernel's configured default clients. Only fbdev emulation is currently supported. Later versions can add support for DRM-based logging, a boot logo or even a console. Some drivers handle the color mode for clients internally. Provide the helper drm_client_setup_with_color_mode() for them. Using the new interface requires the driver to select DRM_CLIENT_SELECTION in its Kconfig. For now this only enables the client-setup helpers if the fbdev client has been configured by the user. A future patchset will further modularize client support and rework DRM_CLIENT_SELECTION to select the correct dependencies for all its clients. v5: - add CONFIG_DRM_CLIENT_SELECTION und DRM_CLIENT_SETUP v4: - fix docs for drm_client_setup_with_fourcc() (Geert) v3: - fix build error v2: - add drm_client_setup_with_fourcc() (Laurent) - push default-format handling into actual clients Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-5-tzimmermann@suse.de 
DRM may support multiple in-kernel clients that run as soon as a DRM
driver has been registered. To select the client(s) in a single place,
introduce drm_client_setup().

Drivers that call the new helper automatically instantiate the kernel's
configured default clients. Only fbdev emulation is currently supported.
Later versions can add support for DRM-based logging, a boot logo or even
a console.

Some drivers handle the color mode for clients internally. Provide the
helper drm_client_setup_with_color_mode() for them.

Using the new interface requires the driver to select
DRM_CLIENT_SELECTION in its Kconfig. For now this only enables the
client-setup helpers if the fbdev client has been configured by the
user. A future patchset will further modularize client support and
rework DRM_CLIENT_SELECTION to select the correct dependencies for
all its clients.

v5:
- add CONFIG_DRM_CLIENT_SELECTION und DRM_CLIENT_SETUP
v4:
- fix docs for drm_client_setup_with_fourcc() (Geert)
v3:
- fix build error
v2:
- add drm_client_setup_with_fourcc() (Laurent)
- push default-format handling into actual clients

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-5-tzimmermann@suse.de