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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>
This commit is contained in:
Jernej Skrabec 2021-04-22 01:14:30 +01:00 committed by Anatolij Gustschin
parent a327feeef4
commit 935b5198ef
1 changed files with 6 additions and 28 deletions
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34
drivers/video/sunxi/sunxi_dw_hdmi.c
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@ -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);