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

[Deucher, Alexander]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Christian König
> Sent: Thursday, August 18, 2016 5:51 AM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander
> Subject: [PATCH] drm/radeon: only apply the SS fractional workaround to
> RS[78]80
> 
> 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>

Please mention the bugzilla in the patch.  With that included:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  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;
>  			}
>  		}
> --
> 2.5.0
> 
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