[PATCH] drm/radeon: only apply the SS fractional workaround to RS[78]80

[Christian König]

Am 18.08.2016 um 11:51 schrieb Christian König:
> From: Christian König <christian.koenig at amd.com>
>
> Looks like some RV6xx have problems with that.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

Ups, here should be a CC:stable as well.

Christian.

> ---
>   drivers/gpu/drm/radeon/atombios_crtc.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
> index a97abc8..1dcf390 100644
> --- a/drivers/gpu/drm/radeon/atombios_crtc.c
> +++ b/drivers/gpu/drm/radeon/atombios_crtc.c
> @@ -627,7 +627,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
>   			if (radeon_crtc->ss.refdiv) {
>   				radeon_crtc->pll_flags |= RADEON_PLL_USE_REF_DIV;
>   				radeon_crtc->pll_reference_div = radeon_crtc->ss.refdiv;
> -				if (rdev->family >= CHIP_RV770)
> +				if (ASIC_IS_AVIVO(rdev) &&
> +				    rdev->family != CHIP_RS780 &&
> +				    rdev->family != CHIP_RS880)
>   					radeon_crtc->pll_flags |= RADEON_PLL_USE_FRAC_FB_DIV;
>   			}
>   		}