linux-kernel - [PATCH] ALSA: hda: Fix tegra hda dp infoframe struct

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Message-ID: <20220913034410.17502-1-mkumard@nvidia.com>
Date:   Tue, 13 Sep 2022 09:14:10 +0530
From:   Mohan Kumar <mkumard@...dia.com>
To:     <tiwai@...e.com>, <perex@...ex.cz>, <thierry.reding@...il.com>
CC:     <jonathanh@...dia.com>, <linux-tegra@...r.kernel.org>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        Mohan Kumar <mkumard@...dia.com>
Subject: [PATCH] ALSA: hda: Fix tegra hda dp infoframe struct

Tegra HDA HW expects infoframe data bytes order same for both
HDMI and DP i.e infoframe data starts from 5th bytes offset.
This hw behavior mandates to have dummy bytes for dp infoframe
structure for Tegra.

Signed-off-by: Mohan Kumar <mkumard@...dia.com>
---
 sound/pci/hda/patch_hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 6c209cd26c0c..a52e764db2e0 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -218,6 +218,9 @@ struct dp_audio_infoframe {
 	u8 type; /* 0x84 */
 	u8 len;  /* 0x1b */
 	u8 ver;  /* 0x11 << 2 */
+#if IS_ENABLED(CONFIG_SND_HDA_TEGRA)
+	u8 checksum; /* Tegra HW expects infoframe bytes from 5th offset */
+#endif
 
 	u8 CC02_CT47;	/* match with HDMI infoframe from this on */
 	u8 SS01_SF24;
-- 
2.17.1