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| author | Alex Deucher <alexdeucher@gmail.com> | 2011-05-20 10:34:17 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-05-20 12:02:22 +0200 |
| commit | 86a94defe2b88380c28547d7053633b26a397d42 (patch) | |
| tree | 5f18745f77235b364f85c8b74804957b285cca4e /drivers/gpu/drm/radeon/radeon_encoders.c | |
| parent | drm/radeon/kms: spread spectrum fixes (diff) | |
| download | linux-86a94defe2b88380c28547d7053633b26a397d42.tar.xz linux-86a94defe2b88380c28547d7053633b26a397d42.zip | |
drm/radeon/kms: fix up DP clock programming on DCE4/5
In DP mode, the DP ref clock can come from PPLL, DCPLL, or ext clock,
depending on the asic. The crtc virtual pixel clock is derived from
the DP ref clock.
- DCE4: PPLL or ext clock
- DCE5: DCPLL or ext clock
Setting ATOM_PPLL_INVALID will cause SetPixelClock to skip
PPLL/DCPLL programming and only program the DP DTO for the
crtc virtual pixel clock.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_encoders.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_encoders.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c index 6c6793e6e3a5..4d66e249e1c1 100644 --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -988,11 +988,16 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t } if (ASIC_IS_DCE5(rdev)) { - if (is_dp && rdev->clock.dp_extclk) - args.v4.acConfig.ucRefClkSource = 3; /* external src */ - else + /* On DCE5 DCPLL usually generates the DP ref clock */ + if (is_dp) { + if (rdev->clock.dp_extclk) + args.v4.acConfig.ucRefClkSource = ENCODER_REFCLK_SRC_EXTCLK; + else + args.v4.acConfig.ucRefClkSource = ENCODER_REFCLK_SRC_DCPLL; + } else args.v4.acConfig.ucRefClkSource = pll_id; } else { + /* On DCE4, if there is an external clock, it generates the DP ref clock */ if (is_dp && rdev->clock.dp_extclk) args.v3.acConfig.ucRefClkSource = 2; /* external src */ else |