From e2f716561b7eb6fd5c5962ee0bdbfc7ce2b21243 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 5 Aug 2015 16:29:40 +0200 Subject: [PATCH] clk: tegra: Disable spread spectrum on pll_d2 Enabling spread spectrum on pll_d2 can lead to issues with display modes. HDMI monitors, for example, would report "Signal Error" and some modes driven over DisplayPort would generate fuzzy horizontal bands. Signed-off-by: Thierry Reding --- drivers/clk/tegra/clk-tegra210.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index 6149573368ef..c1fabd82aa1a 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -1935,8 +1935,9 @@ static struct tegra_clk_pll_params pll_d2_params = { .sdm_din_mask = PLLA_SDM_DIN_MASK, .sdm_ctrl_reg = PLLD2_MISC1, .sdm_ctrl_en_mask = PLLD2_SDM_EN_MASK, - .ssc_ctrl_reg = PLLD2_MISC1, - .ssc_ctrl_en_mask = PLLD2_SSC_EN_MASK, + /* disable spread-spectrum for pll_d2 */ + .ssc_ctrl_reg = 0, + .ssc_ctrl_en_mask = 0, .round_p_to_pdiv = pll_qlin_p_to_pdiv, .pdiv_tohw = pll_qlin_pdiv_to_hw, .div_nmp = &pllss_nmp, -- GitLab