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62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
From 460ddd2729f0dbb2723e48f3a22ffccbb78b42c7 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 31 Mar 2020 17:54:08 +0100
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Subject: [PATCH] dt: Drop I2C for Pi4 HDMI interfaces to 97.5kHz.
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It was set to 390kHz, which is outside of the required spec for
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reading HDMI (max 100kHz). The i2c-brcmstb driver only supports
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a number of fixed bus speeds, of which 97.5kHz is the closest to
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100kHz without exceeding it.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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arch/arm/boot/dts/bcm2711.dtsi | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/arch/arm/boot/dts/bcm2711.dtsi
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+++ b/arch/arm/boot/dts/bcm2711.dtsi
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@@ -358,7 +358,7 @@
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compatible = "brcm,bcm2711-hdmi-i2c";
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reg = <0x7ef04500 0x100>, <0x7ef00b00 0x300>;
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reg-names = "bsc", "auto-i2c";
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- clock-frequency = <390000>;
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+ clock-frequency = <97500>;
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status = "disabled";
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};
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@@ -395,7 +395,7 @@
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compatible = "brcm,bcm2711-hdmi-i2c";
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reg = <0x7ef09500 0x100>, <0x7ef05b00 0x300>;
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reg-names = "bsc", "auto-i2c";
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- clock-frequency = <390000>;
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+ clock-frequency = <97500>;
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status = "disabled";
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};
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};
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