linux-kernel - [PATCH 5.4 042/132] ALSA: hda: Fix 2 channel swapping for Tegra

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Message-Id: <20200915140646.228585358@linuxfoundation.org>
Date:   Tue, 15 Sep 2020 16:12:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mohan Kumar <mkumard@...dia.com>,
        Sameer Pujar <spujar@...dia.com>, Takashi Iwai <tiwai@...e.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 042/132] ALSA: hda: Fix 2 channel swapping for Tegra

From: Mohan Kumar <mkumard@...dia.com>

[ Upstream commit 216116eae43963c662eb84729507bad95214ca6b ]

The Tegra HDA codec HW implementation has an issue related to not
swapping the 2 channel Audio Sample Packet(ASP) channel mapping.
Whatever the FL and FR mapping specified the left channel always
comes out of left speaker and right channel on right speaker. So
add condition to disallow the swapping of FL,FR during the playback.

Signed-off-by: Mohan Kumar <mkumard@...dia.com>
Acked-by: Sameer Pujar <spujar@...dia.com>
Link: https://lore.kernel.org/r/20200825052415.20626-2-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/pci/hda/patch_hdmi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index a13bad262598d..e4e228c095f03 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -3678,6 +3678,7 @@ static int tegra_hdmi_build_pcms(struct hda_codec *codec)
 
 static int patch_tegra_hdmi(struct hda_codec *codec)
 {
+	struct hdmi_spec *spec;
 	int err;
 
 	err = patch_generic_hdmi(codec);
@@ -3685,6 +3686,10 @@ static int patch_tegra_hdmi(struct hda_codec *codec)
 		return err;
 
 	codec->patch_ops.build_pcms = tegra_hdmi_build_pcms;
+	spec = codec->spec;
+	spec->chmap.ops.chmap_cea_alloc_validate_get_type =
+		nvhdmi_chmap_cea_alloc_validate_get_type;
+	spec->chmap.ops.chmap_validate = nvhdmi_chmap_validate;
 
 	return 0;
 }
-- 
2.25.1