From 7bcb9c8d0bc9f3cab8ac2634b056c2e6b63945ca Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Mon, 13 Jun 2022 16:47:43 +0200
Subject: [PATCH] drm/vc4: dsi: Add correct stop condition to vc4_dsi_encoder_disable iteration
Git-commit: 7bcb9c8d0bc9f3cab8ac2634b056c2e6b63945ca
Patch-mainline: v6.0-rc1
References: git-fixes

vc4_dsi_encoder_disable is partially an open coded version of
drm_bridge_chain_disable, but it missed a termination condition
in the loop for ->disable which meant that no post_disable
calls were made.

Add in the termination clause.

Fixes: 033bfe7538a1 ("drm/vc4: dsi: Fix bridge chain handling")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://lore.kernel.org/r/20220613144800.326124-17-maxime@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/vc4/vc4_dsi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 333ea96fcde4..b7b2c76770dc 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -803,6 +803,9 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder)
 	list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) {
 		if (iter->funcs->disable)
 			iter->funcs->disable(iter);
+
+		if (iter == dsi->bridge)
+			break;
 	}
 
 	vc4_dsi_ulps(dsi, true);
-- 
2.35.3