| From 35a652a6591a16bdc6b86f48821f6de1f646f90e Mon Sep 17 00:00:00 2001 |
| From: =?UTF-8?q?Yannick=20Fertr=C3=A9?= <yannick.fertre@st.com> |
| Date: Thu, 21 Mar 2019 09:04:05 +0100 |
| Subject: drm/panel: otm8009a: Add delay at the end of initialization |
| MIME-Version: 1.0 |
| Content-Type: text/plain; charset=UTF-8 |
| Content-Transfer-Encoding: 8bit |
| |
| [ 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 |
| |
