Am Montag, 24. Juni 2024, 09:45:13 CEST schrieb Alexander Stein:
> Hi,
>
> Am Sonntag, 23. Juni 2024, 16:38:36 CEST schrieb Marek Vasut:
> > The MIPI_DSI_CLOCK_NON_CONTINUOUS causes visible artifacts in high
> > resolution modes, disable it. Namely, in DSI->DP mode 1920x1200 24
> > bpp 59.95 Hz, with DSI bus at maximum 1 Gbps per lane setting, the
> > image contains jittering empty lines.
> >
> > Signed-off-by: Marek Vasut <marex@xxxxxxx>
>
> I can't see these artifacts in 1920x1200 24bpp, but still looks good to me
> Acked-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
I have to retract that. After checking for those mentioned artifacts
I noticed that the DP output was running without any issues.
There is something more going on here. Reverting this patch there wasn't
a single output problem.
This changes actually breaks my DSI connection randomly.
Sometimes it works, sometimes not. I also noticed that there wasn't even
a single DP link training failure, so I assume the DSI clock somehow
affected the internal state machine which even affected DP link training.
Until we know what's going on, NAK form me.
Best regards,
Alexander
> > ---
> > Cc: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
> > Cc: Daniel Vetter <daniel@xxxxxxxx>
> > Cc: David Airlie <airlied@xxxxxxxxx>
> > Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
> > Cc: Jonas Karlman <jonas@xxxxxxxxx>
> > Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
> > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> > Cc: Maxime Ripard <mripard@xxxxxxxxxx>
> > Cc: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> > Cc: Robert Foss <rfoss@xxxxxxxxxx>
> > Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
> > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > Cc: kernel@xxxxxxxxxxxxxxxxxx
> > ---
> > V2: No change
> > V3: No change
> > ---
> > drivers/gpu/drm/bridge/tc358767.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
> > index c4e2455ad95e4..a48454fe2f634 100644
> > --- a/drivers/gpu/drm/bridge/tc358767.c
> > +++ b/drivers/gpu/drm/bridge/tc358767.c
> > @@ -2303,7 +2303,7 @@ static int tc_mipi_dsi_host_attach(struct tc_data *tc)
> > dsi->lanes = dsi_lanes;
> > dsi->format = MIPI_DSI_FMT_RGB888;
> > dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> > - MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
> > + MIPI_DSI_MODE_LPM;
> >
> > ret = devm_mipi_dsi_attach(dev, dsi);
> > if (ret < 0) {
> >
>
>
>
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