diff mbox series

[v2,4/4] drm/mediatek: Add pull-down MIPI operation in mtk_dsi_poweroff function

Message ID 1646388956-8033-5-git-send-email-xinlei.lee@mediatek.com (mailing list archive)
State New, archived
Headers show
Series Cooperate with DSI RX devices to modify dsi funcs and delay mipi high to cooperate with panel sequence | expand

Commit Message

Xinlei Lee (李昕磊) March 4, 2022, 10:15 a.m. UTC 
From: Xinlei Lee <xinlei.lee@mediatek.com>

In the dsi_enable function, mtk_dsi_rxtx_control is to
pull up the MIPI signal operation. Before dsi_disable,
MIPI should also be pulled down by writing a register instead of disabling dsi.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 62aa646602bb..17a5270f6c56 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -676,6 +676,8 @@  static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
 	mtk_dsi_reset_engine(dsi);
 	mtk_dsi_lane0_ulp_mode_enter(dsi);
 	mtk_dsi_clk_ulp_mode_enter(dsi);
+	/* set the lane number as 0 */
+	writel(0, dsi->regs + DSI_TXRX_CTRL);
 
 	mtk_dsi_disable(dsi);