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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-16 23:40:32 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2022-05-17 15:11:22 +0200 |
| commit | 20ea6adbf199097c4f5f591ffee088340630dae4 (patch) | |
| tree | d6719d95e136611a1c25bbf7789652d6d402779d /target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch | |
| parent | bca05bd072180dc38ef740b37ded9572a6db1981 (diff) | |
| download | upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.gz upstream-20ea6adbf199097c4f5f591ffee088340630dae4.tar.bz2 upstream-20ea6adbf199097c4f5f591ffee088340630dae4.zip | |
bcm27xx: add support for linux v5.15
Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B
Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch b/target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch new file mode 100644 index 0000000000..35c546a990 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch @@ -0,0 +1,26 @@ +From f44c81e5ba2742d2d3f10b99f30983491b4a138f Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Tue, 10 Nov 2020 11:21:56 +0000 +Subject: [PATCH] drm/panel/raspberrypi-ts: Insert delay before polling + for startup state + +In switching to the hardware I2C controller there is an issue +where we seem to not get back the correct state from the Pi +touchscreen. +Insert a delay before polling to avoid this condition. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c ++++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c +@@ -299,6 +299,7 @@ static int rpi_touchscreen_prepare(struc + int i; + + rpi_touchscreen_i2c_write(ts, REG_POWERON, 1); ++ usleep_range(20000, 25000); + /* Wait for nPWRDWN to go low to indicate poweron is done. */ + for (i = 0; i < 100; i++) { + if (rpi_touchscreen_i2c_read(ts, REG_PORTB) & 1) |