commit: 24a1f16de97c4cf0029d9acd04be06db32208726 From: Mika Kuoppala <[email protected]> Date: Fri, 8 Feb 2013 16:35:37 +0200 Subject: drm/i915: disable shared panel fitter for pipe
If encoder is switched off by BIOS, but the panel fitter is left on, we never try to turn off the panel fitter and leave it still attached to the pipe - which can cause blurry output elsewhere. Based on work by Chris Wilson <[email protected]> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58867 Cc: [email protected] Signed-off-by: Mika Kuoppala <[email protected]> Tested-by: Andreas Sturmlechner <[email protected]> [danvet: Remove the redundant HAS_PCH_SPLIT check and add a tiny comment.] Signed-off-by: Daniel Vetter <[email protected]> --- drivers/gpu/drm/i915/intel_display.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0dfecaf..fc9b987 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3637,6 +3637,7 @@ 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) @@ -3656,6 +3657,13 @@ 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); + intel_disable_pll(dev_priv, pipe); intel_crtc->active = false; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
