This is a note to let you know that I've just added the patch titled
drm/kmb: Remove clearing DPHY regs
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-kmb-remove-clearing-dphy-regs.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 04cd526408addd0aae6d99bd1c6baa0c5bc64b01
Author: Edmund Dea <edmund.j.dea@xxxxxxxxx>
Date: Tue Apr 20 15:31:53 2021 -0700
drm/kmb: Remove clearing DPHY regs
[ Upstream commit 13047a092c6d3f23b7d684b5b3fe46b2b50423b9 ]
Don't clear the shared DPHY registers common to MIPI Rx and MIPI Tx during
DSI initialization since this was causing MIPI Rx reset. Rest of the
writes are bitwise, so will not affect Mipi Rx side.
Fixes: 98521f4d4b4c ("drm/kmb: Mipi DSI part of the display driver")
Signed-off-by: Edmund Dea <edmund.j.dea@xxxxxxxxx>
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@xxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20211013233632.471892-3-anitha.chrisanthus@xxxxxxxxx
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
index 7e2371ffcb18..5bc6c84073a3 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.c
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -1393,11 +1393,6 @@ int kmb_dsi_mode_set(struct kmb_dsi *kmb_dsi, struct drm_display_mode *mode,
mipi_tx_init_cfg.lane_rate_mbps = data_rate;
}
- kmb_write_mipi(kmb_dsi, DPHY_ENABLE, 0);
- kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL0, 0);
- kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL1, 0);
- kmb_write_mipi(kmb_dsi, DPHY_INIT_CTRL2, 0);
-
/* Initialize mipi controller */
mipi_tx_init_cntrl(kmb_dsi, &mipi_tx_init_cfg);
