[PATCH v4 6/6] drm: exynos: dsi: Move DSI init in bridge enable

[Jagan Teki]

Host transfer in DSI master will invoke only when the DSI commands
sent from DSI devices like DSI Panel or DSI bridges and this host
transfer wouldn't invoke I2C based DSI bridge drivers.

Handling DSI host initialization in transfer calls might miss the
controller setup for I2C configured DSI bridges.

So, move the DSI initialization from transfer to bridge enable as
the bridge enable API as it is common across all classes of DSI
device drivers.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Changes for v4:
- none
Changes for v3:
- new patch

 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 774ca265ed3b..d853dd8d1271 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1397,6 +1397,14 @@ static void exynos_dsi_atomic_enable(struct drm_bridge *bridge,
 				    struct drm_bridge_state *old_bridge_state)
 {
 	struct exynos_dsi *dsi = bridge_to_dsi(bridge);
+	int ret;
+
+	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
+		ret = exynos_dsi_init(dsi);
+		if (ret)
+			return;
+		dsi->state |= DSIM_STATE_INITIALIZED;
+	}
 
 	exynos_dsi_set_display_mode(dsi);
 	exynos_dsi_set_display_enable(dsi, true);
@@ -1539,13 +1547,6 @@ static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
 	if (!(dsi->state & DSIM_STATE_ENABLED))
 		return -EINVAL;
 
-	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
-		ret = exynos_dsi_init(dsi);
-		if (ret)
-			return ret;
-		dsi->state |= DSIM_STATE_INITIALIZED;
-	}
-
 	ret = mipi_dsi_create_packet(&xfer.packet, msg);
 	if (ret < 0)
 		return ret;
-- 
2.25.1