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Date: Thu, 10 Dec 2020 18:25:25 -0600 From: Bjorn Andersson <bjorn.andersson@...aro.org> To: Robert Foss <robert.foss@...aro.org> Cc: a.hajda@...sung.com, narmstrong@...libre.com, Laurent.pinchart@...asonboard.com, jonas@...boo.se, jernej.skrabec@...l.net, airlied@...ux.ie, daniel@...ll.ch, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, John Stultz <john.stultz@...aro.org>, Peter Collingbourne <pcc@...gle.com>, Alistair Delva <adelva@...gle.com>, Vinod Koul <vinod.koul@...aro.org>, Anibal Limon <anibal.limon@...aro.org> Subject: Re: [PATCH v1] drm/bridge: lt9611: Fix handling of 4k panels On Mon 23 Nov 04:46 CST 2020, Robert Foss wrote: > 4k requires two dsi pipes, so don't report MODE_OK when only a > single pipe is configured. But rather report MODE_PANEL to > signal that requirements of the panel are not being met. > > Reported-by: Peter Collingbourne <pcc@...gle.com> > Suggested-by: Peter Collingbourne <pcc@...gle.com> > Signed-off-by: Robert Foss <robert.foss@...aro.org> > Tested-by: John Stultz <john.stultz@...aro.org> This looks very similar to what I had in the early revisions of the driver. Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org> Regards, Bjorn > --- > drivers/gpu/drm/bridge/lontium-lt9611.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c > index d734d9402c35..e8eb8deb444b 100644 > --- a/drivers/gpu/drm/bridge/lontium-lt9611.c > +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c > @@ -867,8 +867,14 @@ static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge, > const struct drm_display_mode *mode) > { > struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > > - return lt9611_mode ? MODE_OK : MODE_BAD; > + if (!lt9611_mode) > + return MODE_BAD; > + else if (lt9611_mode->intfs > 1 && !lt9611->dsi1) > + return MODE_PANEL; > + else > + return MODE_OK; > } > > static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) > -- > 2.27.0 >
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