Re: [PATCH v3 1/1] drm: bridge: ti-sn65dsi83: Fix DSI mode flags for stable LVDS output

[Francesco Dolcini]

Hello Luca, Ernest,

On Wed, Sep 09, 2026 at 03:30:53PM +0200, Luca Ceresoli wrote:
> On Fri Sep 4, 2026 at 2:02 PM CEST, Ernest Van Hoecke wrote:
> >> > Also, from our testing, when using:
> >> >
> >> > dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> >> >           MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET;
> >> >
> >> > we are not able to get display output.
> >>
> >> This is the case for the panel I worked on as well. In the practice we both
> >> observe that non-burst mode is what fixes the panel, but there is no clear
> >> explanation of the reason in the docs (that's what I hope to discover from
> >> TI).
> >>
> > I am testing a DSI panel on our Verdin iMX8MP module, and noticed that
> > this caused a regression.

[...]

> > I think we'll need to either revert this and later apply both together
> > when ready, or apply the second patch now as well. Right now, it broke
> > the DSI panel behind a TI sn65dsi83 bridge on v7.3-rc1.
> 
> Reverting is surely the last resort. If you can answer the above questions
> it would be good, maybe we find out reverting is not necessary, and worst
> case we'll revert with better understanding on what went wrong, and maybe
> come up with a new fix that doesn't regress.

What's the status of this regression?

Francesco