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>

1 files changed, 74 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0120-media-tc358743-fix-connected-active-CSI-2-lane-repor.patch b/target/linux/bcm27xx/patches-5.15/950-0120-media-tc358743-fix-connected-active-CSI-2-lane-repor.patch
new file mode 100644
index 0000000000..b25b4a259c
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0120-media-tc358743-fix-connected-active-CSI-2-lane-repor.patch
@@ -0,0 +1,74 @@
+From 31fe8b118083aa6caff216fa476ae2393c49df27 Mon Sep 17 00:00:00 2001
+From: Philipp Zabel <p.zabel@pengutronix.de>
+Date: Thu, 21 Sep 2017 17:30:24 +0200
+Subject: [PATCH] media: tc358743: fix connected/active CSI-2 lane
+ reporting
+
+g_mbus_config was supposed to indicate all supported lane numbers, not
+only the number of those currently in active use. Since the TC358743
+can dynamically reduce the number of active lanes if the required
+bandwidth allows for it, report all lane numbers up to the connected
+number of lanes as supported in pdata mode.
+In device tree mode, do not report lane count and clock mode at all, as
+the receiver driver can determine these from the device tree.
+
+To allow communicating the number of currently active lanes, add a new
+bitfield to the v4l2_mbus_config flags. This is a temporary fix, to be
+used only until a better solution is found.
+
+Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
+---
+ drivers/media/i2c/tc358743.c  | 14 ++++++++++++--
+ include/media/v4l2-mediabus.h |  8 ++++++++
+ 2 files changed, 20 insertions(+), 2 deletions(-)
+
+--- a/drivers/media/i2c/tc358743.c
++++ b/drivers/media/i2c/tc358743.c
+@@ -1609,11 +1609,20 @@ static int tc358743_get_mbus_config(stru
+ 				    struct v4l2_mbus_config *cfg)
+ {
+ 	struct tc358743_state *state = to_state(sd);
++	const u32 mask = V4L2_MBUS_CSI2_LANE_MASK;
++
++	if (state->csi_lanes_in_use > state->bus.num_data_lanes)
++		return -EINVAL;
+ 
+ 	cfg->type = V4L2_MBUS_CSI2_DPHY;
++	cfg->flags = (state->csi_lanes_in_use << __ffs(mask)) & mask;
++
++	/* In DT mode, only report the number of active lanes */
++	if (sd->dev->of_node)
++		return 0;
+ 
+-	/* Support for non-continuous CSI-2 clock is missing in the driver */
+-	cfg->flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
++	/* Support for non-continuous CSI-2 clock is missing in pdate mode */
++	cfg->flags |= V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
+ 
+ 	switch (state->csi_lanes_in_use) {
+ 	case 1:
+@@ -2056,6 +2065,7 @@ static int tc358743_probe(struct i2c_cli
+ 	if (pdata) {
+ 		state->pdata = *pdata;
+ 		state->bus.flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
++		state->bus.num_data_lanes = 4;
+ 	} else {
+ 		err = tc358743_probe_of(state);
+ 		if (err == -ENODEV)
+--- a/include/media/v4l2-mediabus.h
++++ b/include/media/v4l2-mediabus.h
+@@ -92,6 +92,14 @@
+ 					 V4L2_MBUS_CSI2_CHANNEL_1 | \
+ 					 V4L2_MBUS_CSI2_CHANNEL_2 | \
+ 					 V4L2_MBUS_CSI2_CHANNEL_3)
++/*
++ * Number of lanes in use, 0 == use all available lanes (default)
++ *
++ * This is a temporary fix for devices that need to reduce the number of active
++ * lanes for certain modes, until g_mbus_config() can be replaced with a better
++ * solution.
++ */
++#define V4L2_MBUS_CSI2_LANE_MASK                (0xf << 10)
+ 
+ /**
+  * enum v4l2_mbus_type - media bus type