[PATCH] drm/bridge: tc358775: Do not soft reset i2c-slave controller

Teresa Remmet t.remmet at phytec.de
Thu Sep 1 13:19:51 UTC 2022


Soft reset during tc_bridge_enable() is triggered by setting all available
reset control bits in the SYSRST register.
But as noted in the data sheet resetting the i2c-slave controller should
be only done over DSI and is only useful for chip debugging.
So do not set RSTI2CS (bit0).

Signed-off-by: Teresa Remmet <t.remmet at phytec.de>
---
 drivers/gpu/drm/bridge/tc358775.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
index f1c6e62b0e1d..a5f5eae1e80f 100644
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -408,7 +408,7 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
 		 (val >> 8) & 0xFF, val & 0xFF);
 
 	d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
-		  SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
+		  SYS_RST_LCD | SYS_RST_I2CM);
 	usleep_range(30000, 40000);
 
 	d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
-- 
2.25.1



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