qemu: Fix reversed BGR values on ARM Versatile emulation

[YOCTO #1469]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu-0.14.0/arm-bgr.patch b/meta/recipes-devtools/qemu/qemu-0.14.0/arm-bgr.patch
new file mode 100644
index 000000000..3b460d04c
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu-0.14.0/arm-bgr.patch
@@ -0,0 +1,30 @@
+After kernel commit:
+
+http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-3.0/commit/?h=meta&id=9728c1b6a724daefc413b44e10253cdbb5e06d08
+
+It appears that the emulated colours in qemu are incorrect and that 
+the red and blue channels are reversed. This patch reverses that logic
+so the colours are correctly displayed on the versatile platform which
+doesn't support the BGR bit.
+
+RP 16/9/2011
+
+Upstream-status: Pending
+
+Index: qemu-0.14.0/hw/pl110.c
+===================================================================
+--- qemu-0.14.0.orig/hw/pl110.c	2011-09-16 14:45:34.228668514 +0100
++++ qemu-0.14.0/hw/pl110.c	2011-09-16 15:17:22.458671206 +0100
+@@ -141,7 +141,11 @@
+         fprintf(stderr, "pl110: Bad color depth\n");
+         exit(1);
+     }
+-    if (s->cr & PL110_CR_BGR)
++
++    if (s->versatile && s->bpp == BPP_16)
++        /* Code assumes BPP_16 == 565 and BGR is never set on the versatile in 565 mode */
++        bpp_offset = 0;
++    else if (s->cr & PL110_CR_BGR)
+         bpp_offset = 0;
+     else
+         bpp_offset = 18;