openwrt/target/linux/bcm27xx/patches-6.6/950-0709-drm-vc4-Drop-WARN-for-HVS-FIFOs-not-being-empty.patch

From 9afe724a18da7c0136d9118e178f8f53c4a164cf Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 26 Oct 2023 18:05:09 +0100
Subject: [PATCH 0709/1085] drm/vc4: Drop WARN for HVS FIFOs not being empty

The reset condition for the EMPTY flag in DISPSTATx is 0,
so seeing as we've just reset the pipeline there is no
guarantee that the flag will denote empty if it hasn't been
enabled.

Drop the WARN.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -1005,10 +1005,6 @@ static void __vc4_hvs_stop_channel(struc
 				   SCALER_DISPSTATX_MODE) !=
 		     SCALER_DISPSTATX_MODE_DISABLED);
 
-	WARN_ON_ONCE((HVS_READ(SCALER_DISPSTATX(chan)) &
-		      (SCALER_DISPSTATX_FULL | SCALER_DISPSTATX_EMPTY)) !=
-		     SCALER_DISPSTATX_EMPTY);
-
 out:
 	drm_dev_exit(idx);
 }