diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-11 16:29:06 +0200 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-18 09:43:25 +0200 |
commit | 87476d632c5041cfb962630e618d787243c81ed8 (patch) | |
tree | 472b386d263ac65d6a768f0297b45e0dea2d6feb /drivers/gpu/drm/i915/intel_display.c | |
parent | b6c5164d7bf624f3e1b750787ddb983150c5117c (diff) |
drm/i915: Fixup pfit disabling for gen2/3
The recent rework of the pfit handling didn't take into account that
the panel fitter is fixed to pipe B:
commit 24a1f16de97c4cf0029d9acd04be06db32208726
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date: Fri Feb 8 16:35:37 2013 +0200
drm/i915: disable shared panel fitter for pipe
Fix this up by properly computing the pipe the pfit is on. Also
extract the logic into its own function, add a debug assert to check
that the pipe is off (mostly just documentation) and add some debug
output.
If pipe A was disabled after pipe B was set up, the panel fitter will
be disabled. Now most userspace doesn't do modesets in this order,
which is why I couldn't ever reproduce this and why it took me so long
to figure out.
We really need hw state readout and check support for the pannel
fitter ...
Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Hans de Bruin <jmdebruin@xmsnet.nl>
References: http://permalink.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/19049
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fd7fb6a6a9a0..1bbf7071e0c4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3724,6 +3724,26 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc) encoder->enable(encoder); } +static void i9xx_pfit_disable(struct intel_crtc *crtc) +{ + struct drm_device *dev = crtc->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + enum pipe pipe; + uint32_t pctl = I915_READ(PFIT_CONTROL); + + assert_pipe_disabled(dev_priv, crtc->pipe); + + if (INTEL_INFO(dev)->gen >= 4) + pipe = (pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT; + else + pipe = PIPE_B; + + if (pipe == crtc->pipe) { + DRM_DEBUG_DRIVER("disabling pfit, current: 0x%08x\n", pctl); + I915_WRITE(PFIT_CONTROL, 0); + } +} + static void i9xx_crtc_disable(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; @@ -3732,8 +3752,6 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) struct intel_encoder *encoder; int pipe = intel_crtc->pipe; int plane = intel_crtc->plane; - u32 pctl; - if (!intel_crtc->active) return; @@ -3753,11 +3771,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) intel_disable_plane(dev_priv, plane, pipe); intel_disable_pipe(dev_priv, pipe); - /* Disable pannel fitter if it is on this pipe. */ - pctl = I915_READ(PFIT_CONTROL); - if ((pctl & PFIT_ENABLE) && - ((pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT) == pipe) - I915_WRITE(PFIT_CONTROL, 0); + i9xx_pfit_disable(intel_crtc); intel_disable_pll(dev_priv, pipe); |