linux-kernel - [PATCH v4 09/15] drm: bridge/dw_hdmi: enable audio support for No-CEA display resolutions

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Date:	Sat, 28 Feb 2015 21:47:35 -0500
From:	Yakir Yang <ykk@...k-chips.com>
To:	djkurtz@...omium.org, dianders@...omium.org,
	linux-rockchip@...ts.infradead.org
Cc:	David Airlie <airlied@...ux.ie>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Yakir Yang <ykk@...k-chips.com>,
	Andy Yan <andy.yan@...k-chips.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	mmind00@...glemail.com, marcheu@...omium.org,
	mark.yao@...k-chips.com
Subject: [PATCH v4 09/15] drm: bridge/dw_hdmi: enable audio support for No-CEA display resolutions

If the monitor support audio, so we should support audio for it, even if
the display resolution is No-CEA mode.

Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
Changes in v4:
- Add hdmi audio support when monitor support audio

Changes in v3: None
Changes in v2:
- Enable audio support for No-CEA display mode

 drivers/gpu/drm/bridge/dw_hdmi.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index b34ae80..8894e48 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -98,6 +98,7 @@ struct hdmi_id {
 
 struct hdmi_vmode {
 	bool mdvi;
+	bool has_audio;
 	bool mhsyncpolarity;
 	bool mvsyncpolarity;
 	bool minterlaced;
@@ -1267,13 +1268,10 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 
 	hdmi->vic = drm_match_cea_mode(mode);
 
-	if (!hdmi->vic) {
+	if (!hdmi->vic)
 		dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
-		hdmi->hdmi_data.video_mode.mdvi = true;
-	} else {
+	else
 		dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
-		hdmi->hdmi_data.video_mode.mdvi = false;
-	}
 
 	if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
 	    (hdmi->vic == 21) || (hdmi->vic == 22) ||
@@ -1319,10 +1317,10 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	dw_hdmi_enable_video_path(hdmi);
 
 	/* not for DVI mode */
-	if (hdmi->hdmi_data.video_mode.mdvi) {
-		dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
+	if (!hdmi->hdmi_data.video_mode.has_audio) {
+		dev_info(hdmi->dev, "monitor does not support audio\n");
 	} else {
-		dev_dbg(hdmi->dev, "%s CEA mode\n", __func__);
+		dev_dbg(hdmi->dev, "monitor support audio\n");
 
 		/* HDMI Initialization Step E - Configure audio */
 		hdmi_clk_regenerator_update_pixel_clock(hdmi);
@@ -1541,6 +1539,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 {
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
 					     connector);
+	struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
 	struct edid *edid;
 	int ret;
 
@@ -1552,6 +1551,9 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
 			edid->width_cm, edid->height_cm);
 
+		vmode->mdvi = !drm_detect_hdmi_monitor(edid);
+		vmode->has_audio = drm_detect_monitor_audio(edid);
+
 		drm_mode_connector_update_edid_property(connector, edid);
 		ret = drm_add_edid_modes(connector, edid);
 		kfree(edid);
-- 
2.1.2


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