Make hdmi core get its phy by parsing the qcom,hdmi-phy phandle. The core
will use this phy reference to enable/disable phy. The driver defers probe
until phy isn't available.
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/hdmi/hdmi.c | 40 ++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/msm/hdmi/hdmi.h | 2 ++
2 files changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 0fe5411..61b191d 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -81,12 +81,46 @@ static void hdmi_destroy(struct hdmi *hdmi)
if (phy)
phy->funcs->destroy(phy);
+ if (hdmi->phy_dev) {
+ put_device(hdmi->phy_dev);
+ hdmi->phy = NULL;
+ hdmi->phy_dev = NULL;
+ }
+
if (hdmi->i2c)
hdmi_i2c_destroy(hdmi->i2c);
platform_set_drvdata(hdmi->pdev, NULL);
}
+static int hdmi_get_phy(struct hdmi *hdmi)
+{
+ struct platform_device *pdev = hdmi->pdev;
+ struct platform_device *phy_pdev;
+ struct device_node *phy_node;
+
+ phy_node = of_parse_phandle(pdev->dev.of_node, "qcom,hdmi-phy", 0);
+ if (!phy_node) {
+ dev_err(&pdev->dev, "cannot find phy device\n");
+ return -ENXIO;
+ }
+
+ phy_pdev = of_find_device_by_node(phy_node);
+ if (phy_pdev)
+ hdmi->phy = platform_get_drvdata(phy_pdev);
+
+ of_node_put(phy_node);
+
+ if (!phy_pdev || !hdmi->phy) {
+ dev_err(&pdev->dev, "phy driver is not ready\n");
+ return -EPROBE_DEFER;
+ }
+
+ hdmi->phy_dev = get_device(&phy_pdev->dev);
+
+ return 0;
+}
+
/* construct hdmi at bind/probe time, grab all the resources. If
* we are to EPROBE_DEFER we want to do it here, rather than later
* at modeset_init() time
@@ -230,6 +264,12 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
goto fail;
}
+ ret = hdmi_get_phy(hdmi);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get phy\n");
+ goto fail;
+ }
+
hdmi->hdcp_ctrl = hdmi_hdcp_init(hdmi);
if (IS_ERR(hdmi->hdcp_ctrl)) {
dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 3404235..45347d5 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -70,6 +70,8 @@ struct hdmi {
struct clk **pwr_clks;
struct hdmi_phy *phy;
+ struct device *phy_dev;
+
struct i2c_adapter *i2c;
struct drm_connector *connector;
struct drm_bridge *bridge;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
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