From: Lucas Stach <dev@xxxxxxxxxx> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know. =============== [ Upstream commit e3c00d87845ab375f90fa6e10a5e72a3a5778cd3 ] On DCE6.1 PPLL2 is exclusively available to UNIPHYA, so it should not be taken into consideration when looking for an already enabled PLL to be shared with other outputs. This fixes the broken VGA port (TRAVIS DP->VGA bridge) on my Richland based laptop, where the internal display is connected to UNIPHYA through a TRAVIS DP->LVDS bridge. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=78987 v2: agd: add check in radeon_get_shared_nondp_ppll as well, drop extra parameter. Signed-off-by: Lucas Stach <dev@xxxxxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/gpu/drm/radeon/atombios_crtc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index ce8cab5..2f2e50a 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -1730,6 +1730,7 @@ static u32 radeon_get_pll_use_mask(struct drm_crtc *crtc) static int radeon_get_shared_dp_ppll(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; + struct radeon_device *rdev = dev->dev_private; struct drm_crtc *test_crtc; struct radeon_crtc *test_radeon_crtc; @@ -1739,6 +1740,10 @@ static int radeon_get_shared_dp_ppll(struct drm_crtc *crtc) test_radeon_crtc = to_radeon_crtc(test_crtc); if (test_radeon_crtc->encoder && ENCODER_MODE_IS_DP(atombios_get_encoder_mode(test_radeon_crtc->encoder))) { + /* PPLL2 is exclusive to UNIPHYA on DCE61 */ + if (ASIC_IS_DCE61(rdev) && !ASIC_IS_DCE8(rdev) && + test_radeon_crtc->pll_id == ATOM_PPLL2) + continue; /* for DP use the same PLL for all */ if (test_radeon_crtc->pll_id != ATOM_PPLL_INVALID) return test_radeon_crtc->pll_id; @@ -1760,6 +1765,7 @@ static int radeon_get_shared_nondp_ppll(struct drm_crtc *crtc) { struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); struct drm_device *dev = crtc->dev; + struct radeon_device *rdev = dev->dev_private; struct drm_crtc *test_crtc; struct radeon_crtc *test_radeon_crtc; u32 adjusted_clock, test_adjusted_clock; @@ -1775,6 +1781,10 @@ static int radeon_get_shared_nondp_ppll(struct drm_crtc *crtc) test_radeon_crtc = to_radeon_crtc(test_crtc); if (test_radeon_crtc->encoder && !ENCODER_MODE_IS_DP(atombios_get_encoder_mode(test_radeon_crtc->encoder))) { + /* PPLL2 is exclusive to UNIPHYA on DCE61 */ + if (ASIC_IS_DCE61(rdev) && !ASIC_IS_DCE8(rdev) && + test_radeon_crtc->pll_id == ATOM_PPLL2) + continue; /* check if we are already driving this connector with another crtc */ if (test_radeon_crtc->connector == radeon_crtc->connector) { /* if we are, return that pll */ -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html