Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates
 216.228.112.32 as permitted sender) receiver=protection.outlook.com;
 client-ip=216.228.112.32; helo=mail.nvidia.com;
From:   Sameer Pujar <spujar@nvidia.com>
To:     <broonie@kernel.org>, <lgirdwood@gmail.com>, <robh+dt@kernel.org>,
        <thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
        <catalin.marinas@arm.com>, <will@kernel.org>, <perex@perex.cz>,
        <tiwai@suse.com>, <kuninori.morimoto.gx@renesas.com>
CC:     <sharadg@nvidia.com>, <alsa-devel@alsa-project.org>,
        <devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        Sameer Pujar <spujar@nvidia.com>
Subject: [PATCH 03/13] ASoC: audio-graph: Fixup CPU endpoint hw_params in a BE<->BE link
Date:   Fri, 27 Aug 2021 15:03:49 +0530
Message-ID: <1630056839-6562-4-git-send-email-spujar@nvidia.com>
In-Reply-To: <1630056839-6562-1-git-send-email-spujar@nvidia.com>
References: <1630056839-6562-1-git-send-email-spujar@nvidia.com>
MIME-Version: 1.0
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Aug 2021 09:38:17.9595
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: c1c775c8-bcfd-40e1-c488-08d9693e66a5
X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.32];Helo=[mail.nvidia.com]
X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT034.eop-nam11.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4497
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

When multiple components are connected back to back in an audio path,
hw_param fixup may be required for CPU or Codec endpoint of BE<->BE
DAI links. Currently fixup support is available for Codec and this
commit adds similar feature for CPU endpoint of a BE<->BE link.

For example a resampler component can be plugged into an audio path.
  [ FE -> BE1 -> ... -> resampler -> ... BEn ]

The resampler DAI links can be:
  BEx (CPU)              -> resampler input (Codec)
  resampler output (CPU) -> BEy (Codec)

Thus input and output sample rate parameters for resampler can be
fixed up as per the resample requirement.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/generic/audio-graph-card.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 5e71382..7439122 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -309,8 +309,10 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 		 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
 		 * there are 'n' BE components in the path.
 		 */
-		if (card->component_chaining && !soc_component_is_pcm(cpus))
+		if (card->component_chaining && !soc_component_is_pcm(cpus)) {
 			dai_link->no_pcm = 1;
+			dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
+		}
 
 		asoc_simple_canonicalize_cpu(cpus, is_single_links);
 	} else {
-- 
2.7.4