linux-kernel - [PATCH 5.16 005/121] ARM: boot: dts: bcm2711: Fix HVS register range

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Date:   Mon, 14 Mar 2022 12:53:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Maxime Ripard <maxime@...no.tech>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 005/121] ARM: boot: dts: bcm2711: Fix HVS register range

From: Maxime Ripard <maxime@...no.tech>

[ Upstream commit 515415d316168c6521d74ea8280287e28d7303e6 ]

While the HVS has the same context memory size in the BCM2711 than in
the previous SoCs, the range allocated to the registers doubled and it
now takes 16k + 16k, compared to 8k + 16k before.

The KMS driver will use the whole context RAM though, eventually
resulting in a pointer dereference error when we access the higher half
of the context memory since it hasn't been mapped.

Fixes: 4564363351e2 ("ARM: dts: bcm2711: Enable the display pipeline")
Signed-off-by: Maxime Ripard <maxime@...no.tech>
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/bcm2711.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index dff18fc9a906..21294f775a20 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -290,6 +290,7 @@ pixelvalve4: pixelvalve@...16000 {
 
 		hvs: hvs@...00000 {
 			compatible = "brcm,bcm2711-hvs";
+			reg = <0x7e400000 0x8000>;
 			interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
-- 
2.34.1