phy/rockchip: inno-hdmi: round fractal pixclock in rk3328 recalc_rate

[ Upstream commit d5ef343c1d62bc4c4c2c393af654a41cb34b449f ]

inno_hdmi_phy_rk3328_clk_recalc_rate() is returning a rate not found
in the pre pll config table when the fractal divider is used.
This can prevent proper power_on because a tmdsclock for the new rate
is not found in the pre pll config table.

Fix this by saving and returning a rounded pixel rate that exist
in the pre pll config table.

Fixes: 53706a116863 ("phy: add Rockchip Innosilicon hdmi phy")
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20230615171005.2251032-3-jonas@kwiboo.se
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
index 15339338aae35513863f65d154416e1b8696c34b..15a008a1ac7b9813baf478b6d0284041d9d147ac 100644 (file)
--- a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
@@ -745,10 +745,12 @@ unsigned long inno_hdmi_phy_rk3328_clk_recalc_rate(struct clk_hw *hw,
                do_div(vco, (nd * (no_a == 1 ? no_b : no_a) * no_d * 2));
        }
 
-       inno->pixclock = vco;
-       dev_dbg(inno->dev, "%s rate %lu\n", __func__, inno->pixclock);
+       inno->pixclock = DIV_ROUND_CLOSEST((unsigned long)vco, 1000) * 1000;
 
-       return vco;
+       dev_dbg(inno->dev, "%s rate %lu vco %llu\n",
+               __func__, inno->pixclock, vco);
+
+       return inno->pixclock;
 }
 
 static long inno_hdmi_phy_rk3328_clk_round_rate(struct clk_hw *hw,