Re: [PATCH] drm/panel: himax-hx83102: restore MODE_LPM after sending disable cmds

[Doug Anderson]

Hi,

On Sat, Apr 25, 2026 at 9:58 AM Icenowy Zheng <zhengxingda@xxxxxxxxxxx> wrote:
>
> When preparing the panel, it seems that it always expects commands to be
> transferred in LP mode. However, the disable function removes the
> MIPI_DSI_MODE_LPM flag, and no other function re-adds it.
>
> As the unprepare function contains no DSI commands, re-adding the flag
> just after disabling the panel should be safe. Add the code re-adding
> the flag after the two commands for disabling the panel are sent.
>
> This fixes screen unblanking (after blanking once) on
> mt8188-geralt-ciri-sku1 device.
>
> Cc: stable@xxxxxxxxxxxxxxx # 6.11+
> Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver")

This "Fixes" looks wrong. The bug was still there even before the
driver was broken out. ...and it looks like the driver that this was
broken out of (panel-boe-tv101wum-nl6.c) still has the same bug?

-Doug