drm/rockchip: cdn-dp: remove the DP phy switch

There are 2 Type-c PHYs in RK3399, but only one DP controller. Hence
only one PHY can connect to DP controller at one time, the other should
be disconnected. The GRF_SOC_CON26 register has a switch bit to do it,
set this bit means enable PHY 1, clear this bit means enable PHY 0.

If the board has 2 Type-C ports, the DP driver get the phy id from
devm_of_phy_get_by_index, and then control this switch according to
this id. But some others board only has one Type-C port, it may be PHY 0
or PHY 1. The dts node id can not tell us the correct PHY id. Hence move
this switch to PHY driver, the PHY driver can distinguish between PHY 0
and PHY 1, and then write the correct register bit.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
[The phy-changes are in the phy-tree now and the cdn-dp wasn't
 enabled at all so far, so this change can go through drm-misc
 alone without causing issues when testing drm-misc]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20180216120956.19034-6-enric.balletbo@collabora.com

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index ec999d9..c6fbdcd 100644 (file)
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -43,8 +43,6 @@
 #define GRF_SOC_CON9           0x6224
 #define DP_SEL_VOP_LIT         BIT(12)
 #define GRF_SOC_CON26          0x6268
-#define UPHY_SEL_BIT           3
-#define UPHY_SEL_MASK          BIT(19)
 #define DPTX_HPD_SEL           (3 << 12)
 #define DPTX_HPD_DEL           (2 << 12)
 #define DPTX_HPD_SEL_MASK      (3 << 28)
@@ -394,11 +392,6 @@ static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
        union extcon_property_value property;
        int ret;
 
-       ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
-                              (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK);
-       if (ret)
-               return ret;
-
        if (!port->phy_enabled) {
                ret = phy_power_on(port->phy);
                if (ret) {