diff options
| author | Egbert Eich <eich@suse.de> | 2012-10-14 16:33:11 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-10-16 09:33:38 +0200 |
| commit | 6478d414fe4ee3114e760fb6d6df0f8e2f66186a (patch) | |
| tree | 28cb1bce4f4b7538e68b289a88867f01bf7ddfe8 /drivers/gpu | |
| parent | be3cd5e37716bcf1579f63bdd919345a1f9692b9 (diff) | |
DRM/i915: Don't delete DPLL Multiplier during DAC init.
The DPLL multipiler is set up in intel_display.c:i9xx_update_pll()
called from i9xx_crtc_mode_set().
There the DPLL multiplier is adjusted so that the SDVO gets a sufficient
bus clock.
When cloning a CRTC between an SDVO driven encoder and the standard
DAC the DAC setup code reseted the multiplier value to 1 thus undoing
the correct setup. There is no need to touch the multiplier in the DAC
setup code: the correct value (i.e. 1 in case no SDVO encoder is used)
is set by i9xx_update_pll() already.
A comment at the code suggested that this code is a left over from the
days when there was no setup for clone modes.
Signed-off-by: Egbert Eich <eich@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index c42b9809f86..ae3a3d545ef 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -220,20 +220,7 @@ static void intel_crt_mode_set(struct drm_encoder *encoder, intel_encoder_to_crt(to_intel_encoder(encoder)); struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct drm_i915_private *dev_priv = dev->dev_private; - int dpll_md_reg; - u32 adpa, dpll_md; - - dpll_md_reg = DPLL_MD(intel_crtc->pipe); - - /* - * Disable separate mode multiplier used when cloning SDVO to CRT - * XXX this needs to be adjusted when we really are cloning - */ - if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) { - dpll_md = I915_READ(dpll_md_reg); - I915_WRITE(dpll_md_reg, - dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); - } + u32 adpa; adpa = ADPA_HOTPLUG_BITS; if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |