| Message ID | 1422543663-12661-1-git-send-email-deathsimple@vodafone.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Jan 29, 2015 at 10:01 AM, Christian König <deathsimple@vodafone.de> wrote: > From: Christian König <christian.koenig@amd.com> > > This is a workaround for RS880 and older chips which seem to have > an additional limit on the minimum PLL input frequency. > > v2: fix signed/unsigned warning > > Signed-off-by: Christian König <christian.koenig@amd.com> Added to my -fixes queue. Thanks! Alex > --- > drivers/gpu/drm/radeon/radeon_display.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c > index 1021169..913fafa 100644 > --- a/drivers/gpu/drm/radeon/radeon_display.c > +++ b/drivers/gpu/drm/radeon/radeon_display.c > @@ -960,6 +960,9 @@ void radeon_compute_pll_avivo(struct radeon_pll *pll, > if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV && > pll->flags & RADEON_PLL_USE_REF_DIV) > ref_div_max = pll->reference_div; > + else if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) > + /* fix for problems on RS880 */ > + ref_div_max = min(pll->max_ref_div, 7u); > else > ref_div_max = pll->max_ref_div; > > -- > 1.9.1 >
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 1021169..913fafa 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -960,6 +960,9 @@ void radeon_compute_pll_avivo(struct radeon_pll *pll, if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV && pll->flags & RADEON_PLL_USE_REF_DIV) ref_div_max = pll->reference_div; + else if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP) + /* fix for problems on RS880 */ + ref_div_max = min(pll->max_ref_div, 7u); else ref_div_max = pll->max_ref_div;