bcm27xx: add kernel 5.10 support

[openwrt/openwrt.git] / target / linux / bcm27xx / patches-5.10 / 950-0568-drm-vc4-Add-correct-stop-condition-to-vc4_dsi_encode.patch

diff --git a/target/linux/bcm27xx/patches-5.10/950-0568-drm-vc4-Add-correct-stop-condition-to-vc4_dsi_encode.patch b/target/linux/bcm27xx/patches-5.10/950-0568-drm-vc4-Add-correct-stop-condition-to-vc4_dsi_encode.patch
new file mode 100644 (file)
index 0000000..c678689
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0568-drm-vc4-Add-correct-stop-condition-to-vc4_dsi_encode.patch
@@ -0,0 +1,30 @@
+From 709279f0925b7e17f64684a8cab44e1cb72ae56e Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Thu, 15 Apr 2021 16:18:16 +0100
+Subject: [PATCH] drm/vc4: Add correct stop condition to
+ vc4_dsi_encoder_disable iteration
+
+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.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_dsi.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- 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(stru
+       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);