linux-kernel - [PATCH 11/11] ARM: dts: bcm2711: Tune DMA parameters for HDMI audio

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Date:   Fri,  7 May 2021 16:03:34 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        dri-devel@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org, bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org,
        Maxime Ripard <mripard@...nel.org>,
        linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Dom Cobley <dom@...pberrypi.com>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-rpi-kernel@...ts.infradead.org,
        Eric Anholt <eric@...olt.net>,
        Dom Cobley <popcornmix@...il.com>
Subject: [PATCH 11/11] ARM: dts: bcm2711: Tune DMA parameters for HDMI audio

From: Dom Cobley <popcornmix@...il.com>

Enable NO_WAIT_RESP, DMA_WIDE_SOURCE, DMA_WIDE_DEST, and bump the DMA
panic and AXI priorities to avoid any DMA transfer error with HBR audio
(8 channel, 192Hz).

Signed-off-by: Dom Cobley <popcornmix@...il.com>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 arch/arm/boot/dts/bcm2711.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 462b1dfb0385..8a7350cfcd9c 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -352,7 +352,7 @@ hdmi0: hdmi@...00700 {
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
 			ddc = <&ddc0>;
-			dmas = <&dma 10>;
+			dmas = <&dma (10 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};
@@ -395,7 +395,7 @@ hdmi1: hdmi@...05700 {
 				     <9>, <10>, <11>;
 			interrupt-names = "cec-tx", "cec-rx", "cec-low",
 					  "wakeup", "hpd-connected", "hpd-removed";
-			dmas = <&dma 17>;
+			dmas = <&dma (17 | (1 << 27) | (1 << 24)| (15 << 20) | (10 << 16))>;
 			dma-names = "audio-rx";
 			status = "disabled";
 		};
-- 
2.31.1