[RFC,15/17] drm: bridge: samsung-dsim: Move DSI init in bridge enable

Commit Message

Jagan Teki July 4, 2021, 9:02 a.m. UTC

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 based 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 <[e-mail]>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index bc845ae100d4..54767cbf231c 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -1437,6 +1437,13 @@  static void samsung_dsim_bridge_enable(struct drm_bridge *bridge)
 
 	dsi->state |= DSIM_STATE_ENABLED;
 
+	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
+		ret = samsung_dsim_init(dsi);
+		if (ret)
+			return;
+		dsi->state |= DSIM_STATE_INITIALIZED;
+	}
+
 	samsung_dsim_set_display_mode(dsi);
 	samsung_dsim_set_display_enable(dsi, true);
 
@@ -1602,13 +1609,6 @@  static ssize_t samsung_dsim_host_transfer(struct mipi_dsi_host *host,
 	if (!(dsi->state & DSIM_STATE_ENABLED))
 		return -EINVAL;
 
-	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
-		ret = samsung_dsim_init(dsi);
-		if (ret)
-			return ret;
-		dsi->state |= DSIM_STATE_INITIALIZED;
-	}
-
 	ret = mipi_dsi_create_packet(&xfer.packet, msg);
 	if (ret < 0)
 		return ret;