[PATCH 1/2] clk: rockchip: rk3399: add 85.5 MHz rate to PLL rate table

Vasily Khoruzhick anarsoul at gmail.com
Tue Sep 1 16:42:30 PDT 2026


85.5 MHz is the pixel clock of the standard DMT 1366x768 at 60 mode,
which is the native mode of many cheap HDMI panels.

Use a 1368 MHz VCO (24 MHz * 57, already used by the existing
1368 MHz entry) with postdiv1 = postdiv2 = 4 to hit 85.5 MHz
exactly in integer mode.

Assisted-by: Claude:claude-fable-5
Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
---
 drivers/clk/rockchip/clk-rk3399.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index c2b243d7a5e2..db241d2df625 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -98,6 +98,7 @@ static struct rockchip_pll_rate_table rk3399_pll_rates[] = {
 	RK3036_PLL_RATE( 148500000, 1, 99, 4, 4, 1, 0),
 	RK3036_PLL_RATE( 106500000, 1, 71, 4, 4, 1, 0),
 	RK3036_PLL_RATE(  96000000, 1, 64, 4, 4, 1, 0),
+	RK3036_PLL_RATE(  85500000, 1, 57, 4, 4, 1, 0),
 	RK3036_PLL_RATE(  74250000, 2, 99, 4, 4, 1, 0),
 	RK3036_PLL_RATE(  65000000, 1, 65, 6, 4, 1, 0),
 	RK3036_PLL_RATE(  54000000, 1, 54, 6, 4, 1, 0),
-- 
2.55.0




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