From: Cheng-Yi Chiang <cychiang@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: alsa-devel@alsa-project.org, tzungbi@chromium.org,
zhengxing@rock-chips.com, kuninori.morimoto.gx@renesas.com,
a.hajda@samsung.com, airlied@linux.ie, jeffy.chen@rock-chips.com,
dianders@chromium.org, dri-devel@lists.freedesktop.org,
cain.cai@rock-chips.com, linux-rockchip@lists.infradead.org,
Jonas Karlman <jonas@kwiboo.se>,
eddie.cai@rock-chips.com, Laurent.pinchart@ideasonboard.com,
daniel@ffwll.ch, enric.balletbo@collabora.com,
dgreid@chromium.org, sam@ravnborg.org,
linux-arm-kernel@lists.infradead.org, cychiang@chromium.org
Subject: [PATCH v2] drm: dw-hdmi-i2s: enable audio clock in audio_startup
Date: Mon, 2 Sep 2019 11:54:35 +0800 [thread overview]
Message-ID: <20190902035435.44463-1-cychiang@chromium.org> (raw)
In the designware databook, the sequence of enabling audio clock and
setting format is not clearly specified.
Currently, audio clock is enabled in the end of hw_param ops after
setting format.
On some monitors, there is a possibility that audio does not come out.
Fix this by enabling audio clock in audio_startup ops
before hw_param ops setting format.
Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Tested-by: Douglas Anderson <dianders@chromium.org>
---
Changes from v1:
1. Move audio_startup to the front of audio_shutdown.
2. Fix the indentation of audio_startup equal sign using tab.
3. Rebase the patch on linux-next/master.
4. Add Reviewed-by and Tested-by fields from dianders@chromium.org.
5. Add Reviewed-by field from jonas@kwiboo.se.
drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
index 1d15cf9b6821..34d8e837555f 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
@@ -109,6 +109,14 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
hdmi_write(audio, conf0, HDMI_AUD_CONF0);
hdmi_write(audio, conf1, HDMI_AUD_CONF1);
+ return 0;
+}
+
+static int dw_hdmi_i2s_audio_startup(struct device *dev, void *data)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+
dw_hdmi_audio_enable(hdmi);
return 0;
@@ -153,6 +161,7 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
.hw_params = dw_hdmi_i2s_hw_params,
+ .audio_startup = dw_hdmi_i2s_audio_startup,
.audio_shutdown = dw_hdmi_i2s_audio_shutdown,
.get_eld = dw_hdmi_i2s_get_eld,
.get_dai_id = dw_hdmi_i2s_get_dai_id,
--
2.23.0.187.g17f5b7556c-goog
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next reply other threads:[~2019-09-02 3:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 3:54 Cheng-Yi Chiang [this message]
2019-09-02 9:42 ` [PATCH v2] drm: dw-hdmi-i2s: enable audio clock in audio_startup Neil Armstrong
2019-09-02 10:32 ` Jonas Karlman
2019-09-02 11:57 ` Neil Armstrong
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