From 20ea6adbf199097c4f5f591ffee088340630dae4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Mon, 16 May 2022 23:40:32 +0200 Subject: bcm27xx: add support for linux v5.15 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Álvaro Fernández Rojas --- ...aspberrypi-ts-Insert-delay-before-polling.patch | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch (limited to 'target/linux/bcm27xx/patches-5.15/950-0317-drm-panel-raspberrypi-ts-Insert-delay-before-polling.patch') 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 +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 +--- + 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) -- cgit v1.2.3