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    Subject[PATCH 3.16.y-ckt 039/165] drm/radeon: fix 1 RB harvest config setup for TN/RL
    Date
    3.16.7-ckt9 -stable review patch.  If anyone has any objections, please let me know.

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

    From: Alex Deucher <alexander.deucher@amd.com>

    commit dbfb00c3e7e18439f2ebf67fe99bf7a50b5bae1e upstream.

    The logic was reversed from what the hw actually exposed.
    Fixes graphics corruption in certain harvest configurations.

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    drivers/gpu/drm/radeon/ni.c | 8 ++++----
    1 file changed, 4 insertions(+), 4 deletions(-)

    diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
    index 699bd1083e1f..1d0c08de1731 100644
    --- a/drivers/gpu/drm/radeon/ni.c
    +++ b/drivers/gpu/drm/radeon/ni.c
    @@ -1085,12 +1085,12 @@ static void cayman_gpu_init(struct radeon_device *rdev)

    if ((rdev->config.cayman.max_backends_per_se == 1) &&
    (rdev->flags & RADEON_IS_IGP)) {
    - if ((disabled_rb_mask & 3) == 1) {
    - /* RB0 disabled, RB1 enabled */
    - tmp = 0x11111111;
    - } else {
    + if ((disabled_rb_mask & 3) == 2) {
    /* RB1 disabled, RB0 enabled */
    tmp = 0x00000000;
    + } else {
    + /* RB0 disabled, RB1 enabled */
    + tmp = 0x11111111;
    }
    } else {
    tmp = gb_addr_config & NUM_PIPES_MASK;

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