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

   1 From 709279f0925b7e17f64684a8cab44e1cb72ae56e Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 15 Apr 2021 16:18:16 +0100
   4 Subject: [PATCH] drm/vc4: Add correct stop condition to
   5  vc4_dsi_encoder_disable iteration
   6
   7 vc4_dsi_encoder_disable is partially an open coded version of
   8 drm_bridge_chain_disable, but it missed a termination condition
   9 in the loop for ->disable which meant that no post_disable
  10 calls were made.
  11
  12 Add in the termination clause.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_dsi.c | 3 +++
  17  1 file changed, 3 insertions(+)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_dsi.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_dsi.c
  21 @@ -803,6 +803,9 @@ static void vc4_dsi_encoder_disable(stru
  22         list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) {
  23                 if (iter->funcs->disable)
  24                         iter->funcs->disable(iter);
  25 +
  26 +               if (iter == dsi->bridge)
  27 +                       break;
  28         }
  29
  30         vc4_dsi_ulps(dsi, true);