linux-kernel - [PATCH 2/2] drm/bridge: anx7625: add audio codec .get

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Message-Id: <20211109024237.3354741-2-xji@analogixsemi.com>
Date:   Tue,  9 Nov 2021 10:42:37 +0800
From:   Xin Ji <xji@...logixsemi.com>
To:     a.hajda@...sung.com, narmstrong@...libre.com,
        dan.carpenter@...cle.com, robert.foss@...aro.org,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...il.com, airlied@...ux.ie, daniel@...ll.ch,
        sam@...nborg.org, pihsun@...omium.org, tzungbi@...gle.com,
        maxime@...no.tech, drinkcat@...gle.com, hsinyi@...omium.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        bliang@...logixsemi.com, qwen@...logixsemi.com
Cc:     Xin Ji <xji@...logixsemi.com>
Subject: [PATCH 2/2] drm/bridge: anx7625: add audio codec .get_eld support

Provide .get_eld interface in hdmi_codec_ops for hdmi-codec driver.

Signed-off-by: Xin Ji <xji@...logixsemi.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 6d93026c2999..67a87d21b0ba 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1821,9 +1821,27 @@ static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data,
 	return 0;
 }
 
+static int anx7625_audio_get_eld(struct device *dev, void *data,
+				 u8 *buf, size_t len)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->connector) {
+		DRM_DEV_DEBUG_DRIVER(dev, "connector not initial\n");
+		return -EINVAL;
+	}
+
+	DRM_DEV_DEBUG_DRIVER(dev, "audio copy eld\n");
+	memcpy(buf, ctx->connector->eld,
+	       min(sizeof(ctx->connector->eld), len));
+
+	return 0;
+}
+
 static const struct hdmi_codec_ops anx7625_codec_ops = {
 	.hw_params	= anx7625_audio_hw_params,
 	.audio_shutdown = anx7625_audio_shutdown,
+	.get_eld	= anx7625_audio_get_eld,
 	.get_dai_id	= anx7625_hdmi_i2s_get_dai_id,
 	.hook_plugged_cb = anx7625_audio_hook_plugged_cb,
 };
-- 
2.25.1