linux-kernel - [PATCH 2/6] drm: bridge/bridge: add support for rk3288 hdmi-audio

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Message-Id: <1418609494-15820-3-git-send-email-ykk@rock-chips.com>
Date:	Mon, 15 Dec 2014 10:11:30 +0800
From:	Yakir Yang <ykk@...k-chips.com>
To:	Yakir Yang <ykk@...k-chips.com>
Cc:	Philipp Zabel <p.zabel@...gutronix.de>, Zubair.Kakakhel@...tec.com,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Heiko Stuebner <heiko@...ech.de>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Sonny Rao <sonnyrao@...omium.org>,
	Dylan Reid <dgreid@...omium.org>,
	Xu Jianqun <jay.xu@...k-chips.com>,
	Stéphane Marchesin <marcheu@...omium.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Brian Austin <brian.austin@...rus.com>,
	Bard Liao <bardliao@...ltek.com>,
	Max Filippov <jcmvbkbc@...il.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	David Airlie <airlied@...ux.ie>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 2/6] drm: bridge/bridge: add support for rk3288 hdmi-audio

In rk3288 dw-hdmi, AUD_CTS3 register's BIT(4) is CTS_manual. If "CTS_manual"
set to 0b, AUD_CTS3 contains “audCTS[19:0]” generated by the Cycle time counter
according to specified timing. If “CTS_manual” bit equals 1b, AUD_CTS3 should
be configured with the “audCTS[7:0]” value that should be outputted by the Audio
Packetizer.

Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---

 drivers/gpu/drm/bridge/dw_hdmi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 9ba96de..0c19276 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -191,8 +191,10 @@ static void hdmi_set_clock_regenerator_n(struct dw_hdmi *hdmi,
 
 static void hdmi_regenerate_cts(struct dw_hdmi *hdmi, unsigned int cts)
 {
+	int val = (hdmi->dev_type == RK3288_HDMI) ? 0x10 : 0x00;
+
 	/* Must be set/cleared first */
-	hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
+	hdmi_modb(hdmi, val, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
 
 	hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
 	hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
-- 
2.1.2


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