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, 48 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0288-media-bcm2835-unicam-Retain-packing-information-on-G.patch b/target/linux/bcm27xx/patches-5.15/950-0288-media-bcm2835-unicam-Retain-packing-information-on-G.patch
new file mode 100644
index 0000000000..60b8025374
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0288-media-bcm2835-unicam-Retain-packing-information-on-G.patch
@@ -0,0 +1,48 @@
+From 6f1696959ba011cda3138d0dac6ed587282606b6 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Tue, 19 May 2020 11:46:47 +0100
+Subject: [PATCH] media: bcm2835-unicam: Retain packing information on
+ G_FMT
+
+The change to retrieve the pixel format always on g_fmt didn't
+check whether the native or unpacked version of the format
+had been requested, and always returned the packed one.
+Correct this so that the packing setting is retained whereever
+possible.
+
+Fixes "9d59e89 media: bcm2835-unicam: Re-fetch mbus code from subdev
+on a g_fmt call"
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ .../media/platform/bcm2835/bcm2835-unicam.c   | 19 +++++++++++++++++--
+ 1 file changed, 17 insertions(+), 2 deletions(-)
+
+--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
+@@ -980,8 +980,23 @@ static int unicam_g_fmt_vid_cap(struct f
+ 	if (!fmt)
+ 		return -EINVAL;
+ 
+-	node->fmt = fmt;
+-	node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
++	if (node->fmt != fmt) {
++		/*
++		 * The sensor format has changed so the pixelformat needs to
++		 * be updated. Try and retain the packed/unpacked choice if
++		 * at all possible.
++		 */
++		if (node->fmt->repacked_fourcc ==
++						node->v_fmt.fmt.pix.pixelformat)
++			/* Using the repacked format */
++			node->v_fmt.fmt.pix.pixelformat = fmt->repacked_fourcc;
++		else
++			/* Using the native format */
++			node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
++
++		node->fmt = fmt;
++	}
++
+ 	*f = node->v_fmt;
+ 
+ 	return 0;