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Date: Mon, 1 Nov 2021 11:02:09 -0700 From: Doug Anderson <dianders@...omium.org> To: Philip Chen <philipchen@...omium.org> Cc: LKML <linux-kernel@...r.kernel.org>, Stephen Boyd <swboyd@...omium.org>, Rob Clark <robdclark@...omium.org>, Abhinav Kumar <abhinavk@...eaurora.org>, Bernard Zhao <bernard@...o.com>, Dan Carpenter <dan.carpenter@...cle.com>, Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Jonathan Marek <jonathan@...ek.ca>, Nicolas Boichat <drinkcat@...omium.org>, Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>, Viresh Kumar <viresh.kumar@...aro.org>, Yangtao Li <tiny.windzz@...il.com>, dri-devel <dri-devel@...ts.freedesktop.org>, freedreno <freedreno@...ts.freedesktop.org>, linux-arm-msm <linux-arm-msm@...r.kernel.org> Subject: Re: [PATCH] drm/msm/dsi: set default num_data_lanes Hi, On Sat, Oct 30, 2021 at 10:08 AM Philip Chen <philipchen@...omium.org> wrote: > > If "data_lanes" property of the dsi output endpoint is missing in > the DT, num_data_lanes would be 0 by default, which could cause > dsi_host_attach() to fail if dsi->lanes is set to a non-zero value > by the bridge driver. > > According to the binding document of msm dsi controller, the > input/output endpoint of the controller is expected to have 4 lanes. > So let's set num_data_lanes to 4 by default. > > Signed-off-by: Philip Chen <philipchen@...omium.org> > --- > > drivers/gpu/drm/msm/dsi/dsi_host.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Douglas Anderson <dianders@...omium.org>
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