From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Przywara Date: Sun, 7 Mar 2021 01:30:04 +0000 Subject: [PATCH v2 06/19] video: sunxi: Use DW-HDMI hpd function In-Reply-To: <20210306195437.9740-7-jernej.skrabec@siol.net> References: <20210306195437.9740-1-jernej.skrabec@siol.net> <20210306195437.9740-7-jernej.skrabec@siol.net> Message-ID: <20210307013004.2db47271@slackpad.fritz.box> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Sat, 6 Mar 2021 20:54:24 +0100 Jernej Skrabec wrote: > 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 method are equally good as far > as we know. > > Use standard method in order to reduce amount of custom code. Thanks for the clarification! > Signed-off-by: Jernej Skrabec Reviewed-by: Andre Przywara > --- > 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 e3811a2ec15f..37e78ff24111 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); >