bf28fb50bf
As usual, this patches were taken (and rebased) from https://github.com/raspberrypi/linux/commits/rpi-4.1.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 47258
47 lines
1.6 KiB
Diff
47 lines
1.6 KiB
Diff
From d9273547c2d4f0d79a3d22324dfc0e125754e6e0 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
|
|
Date: Sun, 13 Sep 2015 17:17:14 +0200
|
|
Subject: [PATCH 181/203] BCM270X_DT: mz61581: Set txbuflen to 32k
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Because of the spi dma mapping/engine overhead with spi-bcm2835,
|
|
txbuflen has to be increased from 4096 to 32768 to maximize
|
|
throughput (11MB/s at 128MHz).
|
|
|
|
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
|
|
---
|
|
arch/arm/boot/dts/overlays/README | 2 ++
|
|
arch/arm/boot/dts/overlays/mz61581-overlay.dts | 2 ++
|
|
2 files changed, 4 insertions(+)
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -368,6 +368,8 @@ Params: speed Display
|
|
|
|
fps Delay between frame updates
|
|
|
|
+ txbuflen Transmit buffer length (default 32768)
|
|
+
|
|
debug Debug output level {0-7}
|
|
|
|
xohms Touchpanel sensitivity (X-plate resistance)
|
|
--- a/arch/arm/boot/dts/overlays/mz61581-overlay.dts
|
|
+++ b/arch/arm/boot/dts/overlays/mz61581-overlay.dts
|
|
@@ -57,6 +57,7 @@
|
|
bgr;
|
|
fps = <30>;
|
|
buswidth = <8>;
|
|
+ txbuflen = <32768>;
|
|
|
|
reset-gpios = <&gpio 15 0>;
|
|
dc-gpios = <&gpio 25 0>;
|
|
@@ -103,6 +104,7 @@
|
|
speed = <&mz61581>, "spi-max-frequency:0";
|
|
rotate = <&mz61581>, "rotate:0";
|
|
fps = <&mz61581>, "fps:0";
|
|
+ txbuflen = <&mz61581>, "txbuflen:0";
|
|
debug = <&mz61581>, "debug:0";
|
|
xohms = <&mz61581_ts>,"ti,x-plate-ohms;0";
|
|
};
|