From: Xiong Zhang <xiong.y.zhang@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH] drm/i915: correct intel_dp_get_config() function for DevCPT
Date: Fri, 28 Jun 2013 12:59:06 +0800 [thread overview]
Message-ID: <1372395546-15728-1-git-send-email-xiong.y.zhang@intel.com> (raw)
On DevCPT, the control register for Transcoder DP Sync Polarity is
TRANS_DP_CTL, not DP_CTL.
Without this patch, Many call trace occur on CPT machine with DP monitor.
The call trace is like: *ERROR* mismatch in adjusted_mode.flags(expected X,found X)
v2: use intel-crtc to simple patch, suggested by Daniel.
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 35 +++++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 8708a0c..c3ff8ac 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1324,20 +1324,35 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
struct intel_crtc_config *pipe_config)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
u32 tmp, flags = 0;
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ enum port port = dp_to_dig_port(intel_dp)->port;
+ struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
- tmp = I915_READ(intel_dp->output_reg);
+ if ((port == PORT_A) || !HAS_PCH_CPT(dev)) {
+ tmp = I915_READ(intel_dp->output_reg);
+ if (tmp & DP_SYNC_HS_HIGH)
+ flags |= DRM_MODE_FLAG_PHSYNC;
+ else
+ flags |= DRM_MODE_FLAG_NHSYNC;
- if (tmp & DP_SYNC_HS_HIGH)
- flags |= DRM_MODE_FLAG_PHSYNC;
- else
- flags |= DRM_MODE_FLAG_NHSYNC;
+ if (tmp & DP_SYNC_VS_HIGH)
+ flags |= DRM_MODE_FLAG_PVSYNC;
+ else
+ flags |= DRM_MODE_FLAG_NVSYNC;
+ } else {
+ tmp = I915_READ(TRANS_DP_CTL(intel_crtc->pipe));
+ if (tmp & TRANS_DP_HSYNC_ACTIVE_HIGH)
+ flags |= DRM_MODE_FLAG_PHSYNC;
+ else
+ flags |= DRM_MODE_FLAG_NHSYNC;
- if (tmp & DP_SYNC_VS_HIGH)
- flags |= DRM_MODE_FLAG_PVSYNC;
- else
- flags |= DRM_MODE_FLAG_NVSYNC;
+ if (tmp & TRANS_DP_VSYNC_ACTIVE_HIGH)
+ flags |= DRM_MODE_FLAG_PVSYNC;
+ else
+ flags |= DRM_MODE_FLAG_NVSYNC;
+ }
pipe_config->adjusted_mode.flags |= flags;
}
--
1.7.9.5
next reply other threads:[~2013-06-28 4:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 4:59 Xiong Zhang [this message]
2013-06-28 8:28 ` [PATCH] drm/i915: correct intel_dp_get_config() function for DevCPT Daniel Vetter
-- strict thread matches above, loose matches on Subject: below --
2013-06-27 5:25 Xiong Zhang
2013-06-27 10:30 ` Daniel Vetter
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