drm/radeon: don't share PPLLs on DCE4.1

commit 70471860ff9f335c60c004d42ebd48945bfa5403 upstream.

Sharing PPLLs seems to cause problems on some boards.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=45334

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index bf87f6d..86d9ee0 100644 (file)
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1753,7 +1753,7 @@ static int radeon_atom_pick_pll(struct drm_crtc *crtc)
                                if (pll != ATOM_PPLL_INVALID)
                                        return pll;
                        }
-               } else {
+               } else if (!ASIC_IS_DCE41(rdev)) { /* Don't share PLLs on DCE4.1 chips */
                        /* use the same PPLL for all monitors with the same clock */
                        pll = radeon_get_shared_nondp_ppll(crtc);
                        if (pll != ATOM_PPLL_INVALID)