From: Paulo Zanoni <paulo.r.zanoni at intel.com>
This fixes "unclaimed register" messages when booting with eDP only
and i915.disable_power_well=1.
The error messages were caused by:
commit 0e8ffe1bf81b0780cc6229cb38664754dffe8776
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date: Thu Mar 28 10:42:00 2013 +0100
drm/i915: add hw state readout/checking for pipe_config
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 02faba0..61636de 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5856,9 +5856,14 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ enum transcoder cpu_transcoder = crtc->config.cpu_transcoder;
uint32_t tmp;
- tmp = I915_READ(PIPECONF(crtc->config.cpu_transcoder));
+ if (!intel_using_power_well(dev_priv->dev) &&
+ cpu_transcoder != TRANSCODER_EDP)
+ return false;
+
+ tmp = I915_READ(PIPECONF(cpu_transcoder));
if (!(tmp & PIPECONF_ENABLE))
return false;
--
1.7.10.4
