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    Subject[PATCH 5.1 260/405] drm/panel: otm8009a: Add delay at the end of initialization
    Date
    [ Upstream commit 0084c3c71126fc878c6dab8a6ab8ecc484c2be02 ]

    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>
    Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
    Tested-by: Philippe Cornu <philippe.cornu@st.com>
    Signed-off-by: Thierry Reding <treding@nvidia.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/1553155445-13407-1-git-send-email-yannick.fertre@st.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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 87fa316e1d7b0..58ccf648b70fb 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;
    }

    --
    2.20.1


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