From 58786177fc62e50be1c7f5dc703db0fa6a751ea7 Mon Sep 17 00:00:00 2001
From: Christian Hewitt <christianshewitt@gmail.com>
Date: Tue, 18 Jan 2022 15:09:12 +0000
Subject: [PATCH 43/64] WIP: arm64: dts: meson: set p212/p23x/q20x SDIO to
 100MHz

Amlogic datasheets describe 50MHz max-frequency for SDIO on GXL/GXM but
real-world tests on an assortment of GXL and GXM boards show noteable
increases in throughput when max-frequency is 100MHz, so let's use it.

Before results from a p231 device:

Connecting to host 192.168.0.1, port 5201
Reverse mode, remote host 192.168.0.1 is sending
[  5] local 192.168.0.41 port 42550 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  8.84 MBytes  74.2 Mbits/sec
[  5]   1.00-2.00   sec  9.60 MBytes  80.5 Mbits/sec
[  5]   2.00-3.00   sec  9.07 MBytes  76.1 Mbits/sec
[  5]   3.00-4.00   sec  9.14 MBytes  76.6 Mbits/sec
[  5]   4.00-5.00   sec  9.26 MBytes  77.7 Mbits/sec
[  5]   5.00-6.00   sec  9.08 MBytes  76.2 Mbits/sec
[  5]   6.00-7.00   sec  9.11 MBytes  76.4 Mbits/sec
[  5]   7.00-8.00   sec  8.65 MBytes  72.5 Mbits/sec
[  5]   8.00-9.00   sec  9.24 MBytes  77.5 Mbits/sec
[  5]   9.00-10.00  sec  8.57 MBytes  71.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.27  sec  94.1 MBytes  76.8 Mbits/sec    0             sender
[  5]   0.00-10.00  sec  90.6 MBytes  76.0 Mbits/sec                  receiver

clock:		50000000 Hz
actual clock:	50000000 Hz
vdd:		21 (3.3 ~ 3.4 V)
bus mode:	2 (push-pull)
chip select:	0 (don't care)
power mode:	2 (on)
bus width:	2 (4 bits)
timing spec:	2 (sd high-speed)
signal voltage:	1 (1.80 V)
driver type:	0 (driver type B)

After results from a p231 device:

Connecting to host 192.168.0.1, port 5201
Reverse mode, remote host 192.168.0.1 is sending
[  5] local 192.168.0.41 port 58534 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  12.6 MBytes   106 Mbits/sec
[  5]   1.00-2.00   sec  13.0 MBytes   109 Mbits/sec
[  5]   2.00-3.00   sec  12.8 MBytes   107 Mbits/sec
[  5]   3.00-4.00   sec  13.2 MBytes   111 Mbits/sec
[  5]   4.00-5.00   sec  12.4 MBytes   104 Mbits/sec
[  5]   5.00-6.00   sec  11.2 MBytes  93.9 Mbits/sec
[  5]   6.00-7.00   sec  12.3 MBytes   103 Mbits/sec
[  5]   7.00-8.00   sec  12.3 MBytes   103 Mbits/sec
[  5]   8.00-9.00   sec  12.5 MBytes   105 Mbits/sec
[  5]   9.00-10.00  sec  12.3 MBytes   103 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.22  sec   127 MBytes   104 Mbits/sec    0             sender
[  5]   0.00-10.00  sec   125 MBytes   105 Mbits/sec                  receiver

clock:		100000000 Hz
actual clock:	100000000 Hz
vdd:		21 (3.3 ~ 3.4 V)
bus mode:	2 (push-pull)
chip select:	0 (don't care)
power mode:	2 (on)
bus width:	2 (4 bits)
timing spec:	6 (sd uhs SDR104)
signal voltage:	1 (1.80 V)
driver type:	0 (driver type B)

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
---
 arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi   | 2 +-
 arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
index 18f7b730289e..417c6c535325 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
@@ -257,7 +257,7 @@ &sd_emmc_a {
 
 	bus-width = <4>;
 	cap-sd-highspeed;
-	max-frequency = <50000000>;
+	max-frequency = <100000000>;
 
 	non-removable;
 	disable-wp;
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi
index a150cc0e18ff..b3d7b8613d6d 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-p212.dtsi
@@ -121,7 +121,7 @@ &sd_emmc_a {
 
 	bus-width = <4>;
 	cap-sd-highspeed;
-	max-frequency = <50000000>;
+	max-frequency = <100000000>;
 
 	non-removable;
 	disable-wp;
-- 
2.34.1

