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49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
From 8750f19f56a935544b273de02153bca8cca3067e 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: Mon, 14 Aug 2023 07:28:11 +0200
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Subject: clk: sunxi-ng: sun50i-a64: Switch parent of MIPI-DSI 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 c8cdb342b1a0..e76a1c10f390 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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@@ -962,6 +962,8 @@ static struct ccu_mux_nb sun50i_a64_cpu_nb = {
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.bypass_index = 1, /* index of 24 MHz oscillator */
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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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@@ -981,9 +983,16 @@ static int sun50i_a64_ccu_probe(struct platform_device *pdev)
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writel(0x10040000, reg + SUN50I_A64_PLL_AUDIO_BIAS_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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ret = devm_sunxi_ccu_probe(&pdev->dev, reg, &sun50i_a64_ccu_desc);
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if (ret)
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return ret;
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--
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2.51.0
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