video: sunxi: dw-hdmi: Use DM for HVCC regulator

The HDMI PHY depends on the HVCC supply being enabled. So far we have
relied on it being enabled by an earlier firmware stage (SPL or TF-A).
Attempt to enable the regulator here, so we can remove that dependency.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>

diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c
index ef18d1f..0324a05 100644 (file)
--- a/drivers/video/sunxi/sunxi_dw_hdmi.c
+++ b/drivers/video/sunxi/sunxi_dw_hdmi.c
@@ -19,11 +19,13 @@
 #include <asm/arch/lcdc.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
+#include <power/regulator.h>
 
 struct sunxi_dw_hdmi_priv {
        struct dw_hdmi hdmi;
        struct reset_ctl_bulk resets;
        struct clk_bulk clocks;
+       struct udevice *hvcc;
 };
 
 struct sunxi_hdmi_phy {
@@ -333,6 +335,9 @@ static int sunxi_dw_hdmi_probe(struct udevice *dev)
                (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
        int ret;
 
+       if (priv->hvcc)
+               regulator_set_enable(priv->hvcc, true);
+
        /* Set pll3 to 297 MHz */
        clock_set_pll3(297000000);
 
@@ -384,6 +389,10 @@ static int sunxi_dw_hdmi_of_to_plat(struct udevice *dev)
        if (ret)
                return ret;
 
+       ret = device_get_supply_regulator(dev, "hvcc-supply", &priv->hvcc);
+       if (ret)
+               priv->hvcc = NULL;
+
        return 0;
 }