openwrt/target/linux/bcm27xx/patches-6.6/950-0599-drm-vc4-Fix-dlist-debug-not-resetting-the-next-entry.patch

From d64998e5fc5894eb37f142b7259fa3bec091abbc Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 24 Aug 2023 15:36:21 +0100
Subject: [PATCH 0599/1085] drm/vc4: Fix dlist debug not resetting the next
 entry pointer

The debug function to display the dlists didn't reset next_entry_start
when starting each display, so resulting in not stopping the
list at the correct place.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -110,7 +110,7 @@ static int vc4_hvs_debugfs_dlist(struct
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_hvs *hvs = vc4->hvs;
 	struct drm_printer p = drm_seq_file_printer(m);
-	unsigned int next_entry_start = 0;
+	unsigned int next_entry_start;
 	unsigned int i, j;
 	u32 dlist_word, dispstat;
 
@@ -124,6 +124,7 @@ static int vc4_hvs_debugfs_dlist(struct
 		}
 
 		drm_printf(&p, "HVS chan %u:\n", i);
+		next_entry_start = 0;
 
 		for (j = HVS_READ(SCALER_DISPLISTX(i)); j < 256; j++) {
 			dlist_word = readl((u32 __iomem *)vc4->hvs->dlist + j);