From 785c2392c51e1bedbe0647addcfd87f4c77a7e2e Mon Sep 17 00:00:00 2001 From: Frank Oltmanns Date: Sun, 10 Mar 2024 14:21:12 +0100 Subject: [PATCH] clk: sunxi-ng: a64: Set minimum and maximum rate for PLL-MIPI commit 69f16d9b789821183d342719d2ebd4a5ac7178bc upstream. When the Allwinner A64's TCON0 searches the ideal rate for the connected panel, it may happen that it requests a rate from its parent PLL-MIPI which PLL-MIPI does not support. This happens for example on the Olimex TERES-I laptop where TCON0 requests PLL-MIPI to change to a rate of several GHz which causes the panel to stay blank. It also happens on the pinephone where a rate of less than 500 MHz is requested which causes instabilities on some phones. Set the minimum and maximum rate of Allwinner A64's PLL-MIPI according to the Allwinner User Manual. Fixes: ca1170b69968 ("clk: sunxi-ng: a64: force select PLL_MIPI in TCON0 mux") Reported-by: Diego Roversi Closes: https://groups.google.com/g/linux-sunxi/c/Rh-Uqqa66bw Tested-by: Diego Roversi Cc: stable@vger.kernel.org Reviewed-by: Maxime Ripard Signed-off-by: Frank Oltmanns Reviewed-by: Jernej Skrabec Link: https://lore.kernel.org/r/20240310-pinephone-pll-fixes-v4-2-46fc80c83637@oltmanns.dev Signed-off-by: Jernej Skrabec Signed-off-by: Greg Kroah-Hartman --- drivers/clk/sunxi-ng/ccu-sun50i-a64.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/sunxi-ng/ccu-sun50i-a64.c b/drivers/clk/sunxi-ng/ccu-sun50i-a64.c index 8951ffc14ff5..6a4b2b9ef30a 100644 --- a/drivers/clk/sunxi-ng/ccu-sun50i-a64.c +++ b/drivers/clk/sunxi-ng/ccu-sun50i-a64.c @@ -182,6 +182,8 @@ static struct ccu_nkm pll_mipi_clk = { &ccu_nkm_ops, CLK_SET_RATE_UNGATE | CLK_SET_RATE_PARENT), .features = CCU_FEATURE_CLOSEST_RATE, + .min_rate = 500000000, + .max_rate = 1400000000, }, };