[PATCH v2 15/26] 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>
---
Unchanged in v2
---
 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 c2e0ba96e0a0..5b3068e9e8db 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -397,7 +397,10 @@ 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) |
-- 
2.11.0.197.gb556de5.dirty