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    Subject[ 33/48] drm/nv50/kms: use dac loadval from vbios, where its available
    Date
    From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    3.9-stable review patch. If anyone has any objections, please let me know.

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

    From: Ben Skeggs <bskeggs@redhat.com>

    commit d40ee48acde16894fb3b241d7e896d5fa84e0f10 upstream.

    Regression from merging the old nv50/nvd9 code together, and may be
    needed to fully fix fdo#64904.

    The value is ignored completely by the hardware starting from nva3.

    Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
    Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

    ---
    drivers/gpu/drm/nouveau/nv50_display.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/drivers/gpu/drm/nouveau/nv50_display.c
    +++ b/drivers/gpu/drm/nouveau/nv50_display.c
    @@ -1554,7 +1554,9 @@ nv50_dac_detect(struct drm_encoder *enco
    {
    struct nv50_disp *disp = nv50_disp(encoder->dev);
    int ret, or = nouveau_encoder(encoder)->or;
    - u32 load = 0;
    + u32 load = nouveau_drm(encoder->dev)->vbios.dactestval;
    + if (load == 0)
    + load = 340;

    ret = nv_exec(disp->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
    if (ret || load != 7)



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