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    Subject[PATCH 4.9 036/241] ARM: bcm2835: Enable missing CMA settings for VC4 driver
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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

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