Hi,
On Mon, Aug 18, 2025 at 4:50 AM Pin-yen Lin <treapking@xxxxxxxxxxxx> wrote:
>
> Some touch controllers have to be powered on after the panel's backlight
> is enabled. To support these controllers, introduce .panel_enabled() and
> .panel_disabling() to panel_follower_funcs and use them to power on the
> device after the panel and its backlight are enabled.
>
> Signed-off-by: Pin-yen Lin <treapking@xxxxxxxxxxxx>
>
> ---
>
> Changes in v3:
> - Update kernel-docs of drm_panel_add_follower() and drm_panel_remove_follower()
> - Fix the order of calling .panel_disabling() and .panel_unpreparing()
> - Add a blank line before the goto label
>
> Changes in v2:
> - Replace after_panel_enabled flag with enabled/disabling callbacks
>
> drivers/gpu/drm/drm_panel.c | 73 +++++++++++++++++++++++++++++++------
> include/drm/drm_panel.h | 14 +++++++
> 2 files changed, 76 insertions(+), 11 deletions(-)
Looks good to me now.
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
If there are no objections, I'll plan to apply patch #1 next week to
give people a little time to speak up. As per discussion in v2 [1],
unless we hear back an "Ack" from HID maintainers then patch #2 will
just need to wait a while before it can land in the HID tree.
Question for Jessica / Neil: what do you think about landing
${SUBJECT} patch in drm-misc-fixes instead of drm-misc-next? This is a
dependency for the next patch which is marked as a "Fix". It'll mean
that the patch can make it into mainline faster so the HID patch could
land faster. The patch is also pretty low risk...
[1] https://lore.kernel.org/r/CAD=FV=UV8_XGmxC=7Z18PEnj6wKz+yZQuV_4h+LJh_MNCqszvg@xxxxxxxxxxxxxx/
-Doug
