diff options
| author | Jernej Skrabec <jernej.skrabec@siol.net> | 2021-04-22 01:14:30 +0100 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2021-04-24 13:44:49 +0200 |
| commit | 935b5198ef51c2985ec05dc45bdd8144e940b2ce (patch) | |
| tree | 155ca3c49d714eebddd418db31750e1a7f42294c | |
| parent | a327feeef44108000c171ea2d74f4ab33c09bad7 (diff) | |
| download | u-boot-935b5198ef51c2985ec05dc45bdd8144e940b2ce.zip u-boot-935b5198ef51c2985ec05dc45bdd8144e940b2ce.tar.gz u-boot-935b5198ef51c2985ec05dc45bdd8144e940b2ce.tar.bz2 | |
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>
| -rw-r--r-- | drivers/video/sunxi/sunxi_dw_hdmi.c | 34 |
1 files changed, 6 insertions, 28 deletions
diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c index e3811a2..37e78ff 100644 --- 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); |