Re: [PATCH v2 0/7] drm/bridge: tc358768: Long command support

[Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>]

Hi all,

On 11/03/2026 09:48, Tomi Valkeinen wrote:
> This series makes some small improvements to the tc358768 driver, and
> then adds support for long commands, commands that have more than 8
> bytes of payload.
> 
> This has been tested on Toradex Verdin AM62 board, with a ST7703 based
> DSI panel which requires initial configuration using commands that have
> 8+ bytes.
> 
> I tested the following combinations, by observing the panel visually and
> the DSI lanes with an oscilloscope:
> 
> - HS command transfer, continuous clock
> - HS command transfer, non-continuous clock
> - LP command transfer, continuous clock
> - LP command transfer, non-continuous clock
> 
> All except LP + continuous clock work fine. While observing the lanes
> with normal oscilloscope is a very high level and vague view of what
> exactly is going on the lanes, it still looks good to me: initial
> commands are sent in LP, and then video data is being sent in HS, and
> clock lane is continuous. However, the panel stays black, so something
> is not quite right.
> 
> As it doesn't make sense to send commands in LP during initial
> configuration, especially with longer commands, I will leave that
> particular combination unresolved. I'd be interested to hear if it works
> on some other panel.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
> ---
> Changes in v2:
> - Add reviewed-by & tested-by tags
> - Rebase on v7.0-rc2
> - Link to v1: https://lore.kernel.org/r/20251021-tc358768-v1-0-d590dc6a1a0c@ideasonboard.com
Any further comments from anyone? I don't see a specific maintainer for 
this bridge chip, so if there are no comments I'll push this to drm-misc 
in the coming days.

  Tomi