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| author | Alex Deucher <alexander.deucher@amd.com> | 2012-09-12 21:39:57 (GMT) |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2012-09-20 17:10:44 (GMT) |
| commit | 9dbbcfc6894957fdbb311ba92c85c026659878b5 (patch) | |
| tree | 1e0727929dbc39929f53d8a70e6a1df5c3833c37 /drivers/gpu/drm/radeon/atombios_crtc.c | |
| parent | f3dd8508d459a2d0d0bc426144b92f1696d4fe86 (diff) | |
| download | linux-9dbbcfc6894957fdbb311ba92c85c026659878b5.tar.xz | |
drm/radeon/dce3: use a single PPLL for all DP displays
If possible, use a single PPLL for multiple DP displays
on DCE3.x.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_crtc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 8e73d53..c5a0406 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -1652,6 +1652,30 @@ static int radeon_atom_pick_pll(struct drm_crtc *crtc) return ATOM_PPLL1; DRM_ERROR("unable to allocate a PPLL\n"); return ATOM_PPLL_INVALID; + } else if (ASIC_IS_DCE3(rdev)) { + list_for_each_entry(test_encoder, &dev->mode_config.encoder_list, head) { + if (test_encoder->crtc && (test_encoder->crtc == crtc)) { + /* in DP mode, the DP ref clock can come from either PPLL + * depending on the asic: + * DCE3: PPLL1 or PPLL2 + */ + if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(test_encoder))) { + /* use the same PPLL for all DP monitors */ + pll = radeon_get_shared_dp_ppll(crtc); + if (pll != ATOM_PPLL_INVALID) + return pll; + } + break; + } + } + /* all other cases */ + pll_in_use = radeon_get_pll_use_mask(crtc); + if (!(pll_in_use & (1 << ATOM_PPLL2))) + return ATOM_PPLL2; + if (!(pll_in_use & (1 << ATOM_PPLL1))) + return ATOM_PPLL1; + DRM_ERROR("unable to allocate a PPLL\n"); + return ATOM_PPLL_INVALID; } else /* use PPLL1 or PPLL2 */ return radeon_crtc->crtc_id; |