50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
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From f7549fb4c5ab1a2094b7cf805ee27e638e0ea190 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= <megi@xff.cz>
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Date: Wed, 7 Oct 2020 02:11:35 +0200
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Subject: [PATCH 203/391] clk: sunxi-ng: sun50i-a64: Switch parent of MIPI-DSI
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to periph0(1x)
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This makes video0(1x) clock less constrained, and improves compatibility
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with external monitors on Pinephone when using both internal display
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and HDMI output at once.
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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drivers/clk/sunxi-ng/ccu-sun50i-a64.c | 11 ++++++++++-
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1 file changed, 10 insertions(+), 1 deletion(-)
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diff --git a/drivers/clk/sunxi-ng/ccu-sun50i-a64.c b/drivers/clk/sunxi-ng/ccu-sun50i-a64.c
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index 77f887108..6fbfe9b3b 100644
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--- a/drivers/clk/sunxi-ng/ccu-sun50i-a64.c
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+++ b/drivers/clk/sunxi-ng/ccu-sun50i-a64.c
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@@ -950,6 +950,8 @@ static struct ccu_rate_reset_nb sun50i_a64_pll_video0_reset_tcon0_nb = {
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.common = &pll_video0_clk.common,
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};
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+#define CCU_MIPI_DSI_CLK 0x168
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+
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static int sun50i_a64_ccu_probe(struct platform_device *pdev)
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{
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void __iomem *reg;
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@@ -966,9 +968,16 @@ static int sun50i_a64_ccu_probe(struct platform_device *pdev)
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writel(val | (0 << 16), reg + SUN50I_A64_PLL_AUDIO_REG);
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ret = of_property_read_u32_index(of_chosen, "p-boot,framebuffer-start", 0, &val);
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- if (ret)
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+ if (ret) {
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writel(0x515, reg + SUN50I_A64_PLL_MIPI_REG);
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+ /* Set MIPI-DSI clock parent to periph0(1x), so that video0(1x) is free to change. */
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+ val = readl(reg + CCU_MIPI_DSI_CLK);
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+ val &= 0x30f;
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+ val |= (2 << 8) | ((4 - 1) << 0); /* M-1 */
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+ writel(val, reg + CCU_MIPI_DSI_CLK);
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+ }
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+
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/* Force the parent of TCON0 to PLL-MIPI */
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val = readl(reg + SUN50I_A64_TCON0_REG);
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val &= ~GENMASK(26, 24);
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--
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2.35.3
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