Unverified Commit 8d87088e authored by Teresa Remmet's avatar Teresa Remmet Committed by Robert Foss
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drm/bridge: tc358775: Do not soft reset i2c-slave controller 



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: default avatarTeresa Remmet <t.remmet@phytec.de>
Reviewed-by: default avatarRobert Foss <robert.foss@linaro.org>
Signed-off-by: default avatarRobert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220901131951.1116512-1-t.remmet@phytec.de
parent 499143e5

drivers/gpu/drm/bridge/tc358775.c

+1 −1
Original line number Diff line number Diff line
@@ -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);