[PATCH v2 3/5] drm/sysfb: simpledrm: Add support for interconnect paths

[Luca Weiss]

Hi Dmitry,

On Sun Jul 6, 2025 at 1:14 PM CEST, Dmitry Baryshkov wrote:
> On Mon, Jun 23, 2025 at 08:44:47AM +0200, Luca Weiss wrote:
>> Some devices might require keeping an interconnect path alive so that
>> the framebuffer continues working. Add support for that by setting the
>> bandwidth requirements appropriately for all provided interconnect
>> paths.
>> 
>> Reviewed-by: Thomas Zimmermann <tzimmermann at suse.de>
>> Signed-off-by: Luca Weiss <luca.weiss at fairphone.com>
>> ---
>>  drivers/gpu/drm/sysfb/simpledrm.c | 83 +++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 83 insertions(+)
>
> If simpledrm is being replaced by a proper DRM driver (thus removing
> those extra votes), will it prevent ICC device from reaching the sync
> state?

How can I try this out? On Milos I don't have MDSS yet but I can add an
interconnect path on another device to try it.

Are there some prints I can enable, or check sysfs/debugfs to see if it
reached sync state?

I only recall seeing sync_state pending warnings in some instances, but
never that it's synced.

Regards
Luca