diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-06-12 11:47:24 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-06-12 16:50:45 +0200 |
| commit | fdafa9e276235225ce087695984cf1e52dd0c159 (patch) | |
| tree | 05eed23e436834bb3d4f670cc41f9c20085fc1cd /drivers/gpu/drm/i915/intel_sdvo.c | |
| parent | b8c3af766b7f9350c581bb44e6ffaaabc8c1c198 (diff) | |
drm/i915: disable sdvo pixel multiplier cross-check for HAS_PCH_SPLIT
We don't (yet) have proper pixel multiplier readout support on pch
split platforms, so the cross check will naturally fail.
v2: Fix spelling in the comment, spotted by Ville.
v3: Since the ordering constraint is pretty tricky between the crtc
get_pipe_config callback and the encoder->get_config callback add a
few comments about it. Prompted by a discussion with Chris Wilson on
irc about why this does work anywhere else than on i915g/gm.
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_sdvo.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sdvo.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index 97d3099aea2..b8e1623be30 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -1342,6 +1342,13 @@ static void intel_sdvo_get_config(struct intel_encoder *encoder, pipe_config->adjusted_mode.flags |= flags; + /* + * pixel multiplier readout is tricky: Only on i915g/gm it is stored in + * the sdvo port register, on all other platforms it is part of the dpll + * state. Since the general pipe state readout happens before the + * encoder->get_config we so already have a valid pixel multplier on all + * other platfroms. + */ if (IS_I915G(dev) || IS_I915GM(dev)) { sdvox = I915_READ(intel_sdvo->sdvo_reg); pipe_config->pixel_multiplier = @@ -1362,6 +1369,10 @@ static void intel_sdvo_get_config(struct intel_encoder *encoder, encoder_pixel_multiplier = 4; break; } + + if(HAS_PCH_SPLIT(dev)) + return; /* no pixel multiplier readout support yet */ + WARN(encoder_pixel_multiplier != pipe_config->pixel_multiplier, "SDVO pixel multiplier mismatch, port: %i, encoder: %i\n", pipe_config->pixel_multiplier, encoder_pixel_multiplier); |