drm/log: select CONFIG_FONT_SUPPORT

Without fonts, this fails to link:

drivers/gpu/drm/clients/drm_log.o: in function `drm_log_init_client':
drm_log.c:(.text+0x3d4): undefined reference to `get_def

drm/log: select CONFIG_FONT_SUPPORT

Without fonts, this fails to link:

drivers/gpu/drm/clients/drm_log.o: in function `drm_log_init_client':
drm_log.c:(.text+0x3d4): undefined reference to `get_default_font'

Select this, like the other users do.

Fixes: f7b42442c4ac ("drm/log: Introduce a new boot logger to draw the kmsg on the screen")
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Jocelyn Falempe <[email protected]>
Signed-off-by: Jocelyn Falempe <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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drm/client: Fix drm client endless Kconfig loop

if DRM_CLIENT_SELECTION is enabled, and none of the client is, the
"Default DRM Client" choice is empty, and this makes Kconfig goes
into an infinite

drm/client: Fix drm client endless Kconfig loop

if DRM_CLIENT_SELECTION is enabled, and none of the client is, the
"Default DRM Client" choice is empty, and this makes Kconfig goes
into an infinite loop of:

Default DRM Client
choice[1-0?]: 0
Default DRM Client
choice[1-0?]: 0
Default DRM Client
choice[1-0?]: 0
....

So only allow the choice if at least one of the client is selected.

Fixes: f7b42442c4ac ("drm/log: Introduce a new boot logger to draw the kmsg on the screen")
Reported-by: Dan Carpenter <[email protected]>
Closes: https://lore.kernel.org/dri-devel/[email protected]/T/#md78853bba8904fd7614073f280f721d13ab0b432
Signed-off-by: Jocelyn Falempe <[email protected]>
Tested-by: Dan Carpenter <[email protected]>
Acked-by: Simona Vetter <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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drm/log: Introduce a new boot logger to draw the kmsg on the screen

drm_log is a simple logger that uses the drm_client API to print the
kmsg boot log on the screen. This is not a full replacement t

drm/log: Introduce a new boot logger to draw the kmsg on the screen

drm_log is a simple logger that uses the drm_client API to print the
kmsg boot log on the screen. This is not a full replacement to fbcon,
as it will only print the kmsg. It will never handle user input, or a
terminal because this is better done in userspace.

Design decisions:
* It uses the drm_client API, so it should work on all drm drivers
from the start.
* It doesn't scroll the message, that way it doesn't need to redraw
the whole screen for each new message.
It also means it doesn't have to keep drawn messages in memory, to
redraw them when scrolling.
* It uses the new non-blocking console API, so it should work well
with PREEMPT_RT.

This patch also adds a Kconfig menu to select the drm client to use.
It can be overwritten on the kernel command line with:
drm_client_lib.active=log or drm_client_lib.active=fbdev

Signed-off-by: Jocelyn Falempe <[email protected]>
Reviewed-by: John Ogness <[email protected]> # console API
Reviewed-by: Thomas Zimmermann <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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drm: Move client code to clients/ subdirectory

Just move some files around to keep source code well organized. Plus
fix a type in the help text of CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM. No
functional chan

drm: Move client code to clients/ subdirectory

Just move some files around to keep source code well organized. Plus
fix a type in the help text of CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM. No
functional changes.

Signed-off-by: Thomas Zimmermann <[email protected]>
Reviewed-by: Jocelyn Falempe <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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