[PATCH 17/27] drm/rockchip: dw-mipi-dsi: ensure PHY is reset

[John Keeping]

Also don't power up the DSI host at this point since this is not
necessary in order to configure the PHY and we do so later when
selecting video or command mode.

Signed-off-by: John Keeping <john at metanate.com>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index e621b66b9617..e310c3d81bb8 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -398,7 +398,10 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
 		return testdin;
 	}
 
-	dsi_write(dsi, DSI_PWR_UP, POWERUP);
+	/* Start by clearing PHY state */
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
 
 	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
 					 VCO_RANGE_CON_SEL(vco) |
-- 
2.10.0.278.g4f427b1.dirty