[ 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-em... 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; }