3b4e6e9462
The documentation for struct phy state that "The content of the
structure is managed solely by the PHY API and PHY drivers".
Change to use the generic_phy_valid() helper to check if phy is valid.
Fixes: b7d8d40346 ("video: rockchip: dw_mipi_dsi: Fix external phy existence check")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>