This is a note to let you know that I've just added the patch titled
ARM: bcm2835: Enable missing CMA settings for VC4 driver
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: arm-bcm2835-enable-missing-cma-settings-for-vc4-driver.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Sun Mar 18 16:55:33 CET 2018
From: Stefan Wahren stefan.wahren@i2se.com Date: Sat, 4 Mar 2017 09:43:51 +0000 Subject: ARM: bcm2835: Enable missing CMA settings for VC4 driver
From: Stefan Wahren stefan.wahren@i2se.com
[ Upstream commit bdd3c25423cb42171446940bca0946e0443e1a84 ]
Currently bcm2835_defconfig has CMA disabled which makes the HDMI output on a Raspberry Pi 1 stop working during boot:
fb: switching to vc4drmfb from simple Console: switching to colour dummy device 80x30 [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 0 [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [drm] Driver supports precise vblank timestamp query. vc4-drm soc:gpu: failed to allocate buffer with size 9216000 vc4-drm soc:gpu: Failed to set initial hw configuration.
So enable CMA and DMA_CMA in bcm2835_defconfig.
Signed-off-by: Stefan Wahren stefan.wahren@i2se.com Fixes: 4400d9ac05ee ("ARM: bcm2835: Enable the VC4 graphics driver in the defconfig") Reviewed-by: Eric Anholt eric@anholt.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/configs/bcm2835_defconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm/configs/bcm2835_defconfig +++ b/arch/arm/configs/bcm2835_defconfig @@ -1,6 +1,5 @@ # CONFIG_LOCALVERSION_AUTO is not set CONFIG_SYSVIPC=y -CONFIG_FHANDLE=y CONFIG_NO_HZ=y CONFIG_HIGH_RES_TIMERS=y CONFIG_BSD_PROCESS_ACCT=y @@ -32,6 +31,7 @@ CONFIG_PREEMPT_VOLUNTARY=y CONFIG_AEABI=y CONFIG_KSM=y CONFIG_CLEANCACHE=y +CONFIG_CMA=y CONFIG_SECCOMP=y CONFIG_KEXEC=y CONFIG_CRASH_DUMP=y @@ -52,6 +52,7 @@ CONFIG_MAC80211=y CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y # CONFIG_STANDALONE is not set +CONFIG_DMA_CMA=y CONFIG_SCSI=y CONFIG_BLK_DEV_SD=y CONFIG_SCSI_CONSTANTS=y @@ -62,7 +63,6 @@ CONFIG_USB_NET_SMSC95XX=y CONFIG_ZD1211RW=y CONFIG_INPUT_EVDEV=y # CONFIG_LEGACY_PTYS is not set -# CONFIG_DEVKMEM is not set CONFIG_SERIAL_AMBA_PL011=y CONFIG_SERIAL_AMBA_PL011_CONSOLE=y CONFIG_TTY_PRINTK=y
Patches currently in stable-queue which might be from stefan.wahren@i2se.com are
queue-4.9/arm-bcm2835-enable-missing-cma-settings-for-vc4-driver.patch