target/linux/bcm27xx/patches-6.1/950-1068-drm-vc4-Drop-WARN-for-HVS-FIFOs-not-being-empty.patch

   1 From 31c4c359aa2dbb1a7c095f0a6ef4e13cd46cfd14 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 26 Oct 2023 18:05:09 +0100
   4 Subject: [PATCH] drm/vc4: Drop WARN for HVS FIFOs not being empty
   5
   6 The reset condition for the EMPTY flag in DISPSTATx is 0,
   7 so seeing as we've just reset the pipeline there is no
   8 guarantee that the flag will denote empty if it hasn't been
   9 enabled.
  10
  11 Drop the WARN.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  14 ---
  15  drivers/gpu/drm/vc4/vc4_hvs.c | 4 ----
  16  1 file changed, 4 deletions(-)
  17
  18 --- a/drivers/gpu/drm/vc4/vc4_hvs.c
  19 +++ b/drivers/gpu/drm/vc4/vc4_hvs.c
  20 @@ -1005,10 +1005,6 @@ static void __vc4_hvs_stop_channel(struc
  21                                    SCALER_DISPSTATX_MODE) !=
  22                      SCALER_DISPSTATX_MODE_DISABLED);
  23
  24 -       WARN_ON_ONCE((HVS_READ(SCALER_DISPSTATX(chan)) &
  25 -                     (SCALER_DISPSTATX_FULL | SCALER_DISPSTATX_EMPTY)) !=
  26 -                    SCALER_DISPSTATX_EMPTY);
  27 -
  28  out:
  29         drm_dev_exit(idx);
  30  }