bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0647-media-i2c-imx219-Fix-power-sequence.patch b/target/linux/bcm27xx/patches-5.4/950-0647-media-i2c-imx219-Fix-power-sequence.patch
new file mode 100644
index 0000000000..b85d917878
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0647-media-i2c-imx219-Fix-power-sequence.patch
@@ -0,0 +1,55 @@
+From 0fec1c81707f5335d0b04b5e97d2ddd0b902377b Mon Sep 17 00:00:00 2001
+From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
+Date: Tue, 10 Mar 2020 14:17:07 +0100
+Subject: [PATCH] media: i2c: imx219: Fix power sequence
+
+Commit ca45448a56659c6df6e0436188e97f6cc65dea8a upstream.
+
+When supporting Rpi Camera v2 Module on the RZ/G2E, found the driver had
+some issues with rcar mipi-csi driver. The sensor never entered into LP-11
+state.
+
+The powerup sequence in the datasheet[1] shows the sensor entering into
+LP-11 in streaming mode, so to fix this issue transitions are performed
+from "streaming -> standby" in the probe() after power up.
+
+With this commit the sensor is able to enter LP-11 mode during power up,
+as expected by some CSI-2 controllers.
+
+[1] https://publiclab.org/system/images/photos/000/023/294/original/
+RASPBERRY_PI_CAMERA_V2_DATASHEET_IMX219PQH5_7.0.0_Datasheet_XXX.PDF
+
+Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
+Acked-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
+Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+---
+ drivers/media/i2c/imx219.c | 17 +++++++++++++++++
+ 1 file changed, 17 insertions(+)
+
+--- a/drivers/media/i2c/imx219.c
++++ b/drivers/media/i2c/imx219.c
+@@ -1224,6 +1224,23 @@ static int imx219_probe(struct i2c_clien
+ 	/* Set default mode to max resolution */
+ 	imx219->mode = &supported_modes[0];
+ 
++	/* sensor doesn't enter LP-11 state upon power up until and unless
++	 * streaming is started, so upon power up switch the modes to:
++	 * streaming -> standby
++	 */
++	ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
++			       IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
++	if (ret < 0)
++		goto error_power_off;
++	usleep_range(100, 110);
++
++	/* put sensor back to standby mode */
++	ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
++			       IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
++	if (ret < 0)
++		goto error_power_off;
++	usleep_range(100, 110);
++
+ 	ret = imx219_init_controls(imx219);
+ 	if (ret)
+ 		goto error_power_off;