video: sunxi: Use DW-HDMI hpd function

It turns out that there are two ways how hot plug detection can be done.
One is standard way for DW HDMI controller - checking bit 2 in 0x3004
register. Another way is applicable only to Allwinner custom PHY - by
checking bit 19 in register 0x10038. Both methods are equally good as
far as we know.

Use standard method in order to reduce amount of custom code.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c
index e3811a2..37e78ff 100644 (file)
--- a/drivers/video/sunxi/sunxi_dw_hdmi.c
+++ b/drivers/video/sunxi/sunxi_dw_hdmi.c
@@ -114,28 +114,6 @@ static void sunxi_dw_hdmi_phy_init(void)
        writel(0x42494E47, &phy->unscramble);
 }
 
-static int sunxi_dw_hdmi_get_plug_in_status(void)
-{
-       struct sunxi_hdmi_phy * const phy =
-               (struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
-
-       return !!(readl(&phy->status) & (1 << 19));
-}
-
-static int sunxi_dw_hdmi_wait_for_hpd(void)
-{
-       ulong start;
-
-       start = get_timer(0);
-       do {
-               if (sunxi_dw_hdmi_get_plug_in_status())
-                       return 0;
-               udelay(100);
-       } while (get_timer(start) < 300);
-
-       return -1;
-}
-
 static void sunxi_dw_hdmi_phy_set(uint clock, int phy_div)
 {
        struct sunxi_hdmi_phy * const phy =
@@ -370,12 +348,6 @@ static int sunxi_dw_hdmi_probe(struct udevice *dev)
 
        sunxi_dw_hdmi_phy_init();
 
-       ret = sunxi_dw_hdmi_wait_for_hpd();
-       if (ret < 0) {
-               debug("hdmi can not get hpd signal\n");
-               return -1;
-       }
-
        priv->hdmi.ioaddr = SUNXI_HDMI_BASE;
        priv->hdmi.i2c_clk_high = 0xd8;
        priv->hdmi.i2c_clk_low = 0xfe;
@@ -383,6 +355,12 @@ static int sunxi_dw_hdmi_probe(struct udevice *dev)
        priv->hdmi.phy_set = sunxi_dw_hdmi_phy_cfg;
        priv->mux = uc_plat->source_id;
 
+       ret = dw_hdmi_phy_wait_for_hpd(&priv->hdmi);
+       if (ret < 0) {
+               debug("hdmi can not get hpd signal\n");
+               return -1;
+       }
+
        uclass_get_device_by_phandle(UCLASS_I2C, dev, "ddc-i2c-bus",
                                     &priv->hdmi.ddc_bus);