printk: Rename console_start to console_resume

The intent of console_start was to resume a previously suspended console,
so rename it accordingly.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@su

printk: Rename console_start to console_resume

The intent of console_start was to resume a previously suspended console,
so rename it accordingly.

Signed-off-by: Marcos Paulo de Souza <[email protected]>
Reviewed-by: Petr Mladek <[email protected]>
Reviewed-by: John Ogness <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: Fixed typo in the commit message. Updated also new drm_log.c.]
Signed-off-by: Petr Mladek <[email protected]>

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printk: Rename console_stop to console_suspend

The intent of console_stop was in fact to suspend it, so rename the
function accordingly.

Signed-off-by: Marcos Paulo de Souza <[email protected]>
Re

printk: Rename console_stop to console_suspend

The intent of console_stop was in fact to suspend it, so rename the
function accordingly.

Signed-off-by: Marcos Paulo de Souza <[email protected]>
Reviewed-by: Petr Mladek <[email protected]>
Reviewed-by: John Ogness <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: Fixed typo in the commit message. Updated also new drm_log.c]
Signed-off-by: Petr Mladek <[email protected]>

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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: Add integer scaling support

Add a module parameter, to increase the font size for HiDPI screen.
Even with CONFIG_FONT_TER16x32, it can still be a bit small to read.
In this case, adding drm

drm/log: Add integer scaling support

Add a module parameter, to increase the font size for HiDPI screen.
Even with CONFIG_FONT_TER16x32, it can still be a bit small to read.
In this case, adding drm_log.scale=2 to your kernel command line will
double the character size.

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

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drm/log: Implement suspend/resume

Normally the console is already suspended when the graphic driver
suspend callback is called, but if the parameter no_console_suspend
is set, it might still be acti

drm/log: Implement suspend/resume

Normally the console is already suspended when the graphic driver
suspend callback is called, but if the parameter no_console_suspend
is set, it might still be active.
So call console_stop()/console_start() in the suspend/resume
callbacks, to make sure it won't try to write to the framebuffer
while the graphic driver is suspended.

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

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drm/log: Color the timestamp, to improve readability

Color the timesamp prefix, similar to dmesg.

Signed-off-by: Jocelyn Falempe <[email protected]>
Reviewed-by: Thomas Zimmermann <tzimmermann@su

drm/log: Color the timestamp, to improve readability

Color the timesamp prefix, similar to dmesg.

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

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drm/log: Do not draw if drm_master is taken

When userspace takes drm_master, the drm_client buffer is no more
visible, so drm_log shouldn't waste CPU cycle to draw on it.

Signed-off-by: Jocelyn Fal

drm/log: Do not draw if drm_master is taken

When userspace takes drm_master, the drm_client buffer is no more
visible, so drm_log shouldn't waste CPU cycle to draw on it.

Signed-off-by: Jocelyn Falempe <[email protected]>
Reviewed-by: Thomas Zimmermann <[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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