openwrt/target/linux/bcm27xx/patches-5.15/950-0619-drm-vc4-hvs-Remove-dlist-setup-duplication.patch

From 5fa4e656501eed725b9151a38e5b55a45571bf31 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Mon, 6 Dec 2021 16:17:56 +0100
Subject: [PATCH] drm/vc4: hvs: Remove dlist setup duplication

Setting the DISPLISTx register needs to occur in every case, and we
don't need to protect the register using the event_lock, so we can just
move it after the if branches and simplify a bit the function.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -639,15 +639,12 @@ static void vc4_hvs_update_dlist(struct
 			crtc->state->event = NULL;
 		}
 
-		HVS_WRITE(SCALER_DISPLISTX(vc4_state->assigned_channel),
-			  vc4_state->mm.start);
-
 		spin_unlock_irqrestore(&dev->event_lock, flags);
-	} else {
-		HVS_WRITE(SCALER_DISPLISTX(vc4_state->assigned_channel),
-			  vc4_state->mm.start);
 	}
 
+	HVS_WRITE(SCALER_DISPLISTX(vc4_state->assigned_channel),
+		  vc4_state->mm.start);
+
 	spin_lock_irqsave(&vc4_crtc->irq_lock, flags);
 	vc4_crtc->current_dlist = vc4_state->mm.start;
 	spin_unlock_irqrestore(&vc4_crtc->irq_lock, flags);