[PATCH v3 5/9] video: sunxi: Use DW-HDMI hpd function
Andre Przywara
andre.przywara at arm.com
Thu Apr 22 02:14:30 CEST 2021
From: Jernej Skrabec <jernej.skrabec at siol.net>
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 at arm.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
drivers/video/sunxi/sunxi_dw_hdmi.c | 34 +++++------------------------
1 file changed, 6 insertions(+), 28 deletions(-)
diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c
index e3811a2ec15..37e78ff2411 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);
--
2.17.5
More information about the U-Boot
mailing list