From e00012b256d402efe5cd1c17571524be645af6e4 Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Thu, 25 Feb 2016 11:22:40 +0530 Subject: [PATCH] drm/msm/hdmi: Make HDMI core get its PHY Make HDMI core get its PHY by parsing the "phys" phandle. The core will use this PHY reference to enable/disable PHY. The driver defers probe until PHY isn't available. The DT bindings used here is the same as the one used for PHYs using the common PHY framework bindings. Signed-off-by: Archit Taneja Signed-off-by: Rob Clark --- 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 0fe5411c5c3e..043a70c17f98 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, "phys", 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 1beace8bcb4b..f8122cf099b1 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; -- 2.39.5