diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0181-BCM270X_DT-mz61581-Set-txbuflen-to-32k.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0181-BCM270X_DT-mz61581-Set-txbuflen-to-32k.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0181-BCM270X_DT-mz61581-Set-txbuflen-to-32k.patch b/target/linux/brcm2708/patches-4.1/0181-BCM270X_DT-mz61581-Set-txbuflen-to-32k.patch new file mode 100644 index 0000000000..076c2a545e --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0181-BCM270X_DT-mz61581-Set-txbuflen-to-32k.patch @@ -0,0 +1,47 @@ +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"; + }; |