Messages in this thread Patch in this message | | | From | Philippe CORNU <> | Subject | Re: [PATCH] drm/panel: otm8009a: add delay at the end of initialization | Date | Tue, 26 Mar 2019 12:48:24 +0000 |
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Dear Yannick, Many thanks for your patch.
Reviewed-by: Philippe Cornu <philippe.cornu@st.com> Tested-by: Philippe Cornu <philippe.cornu@st.com>
Best regards, Philippe
On 3/21/19 9:04 AM, Yannick Fertré wrote: > At the end of initialization, a delay is required by the panel. > Without this delay, the panel could received a frame early & > generate a crash of panel (black screen). > > Signed-off-by: Yannick Fertré <yannick.fertre@st.com> > --- > drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c > index 87fa316..58ccf64 100644 > --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c > +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c > @@ -248,6 +248,9 @@ static int otm8009a_init_sequence(struct otm8009a *ctx) > /* Send Command GRAM memory write (no parameters) */ > dcs_write_seq(ctx, MIPI_DCS_WRITE_MEMORY_START); > > + /* Wait a short while to let the panel be ready before the 1st frame */ > + mdelay(10); > + > return 0; > } > > | |