Commit 63000ef6 authored by Xiong Zhang's avatar Xiong Zhang Committed by Daniel Vetter

drm/i915: correct intel_dp_get_config() function for DevCPT

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: default avatarXiong Zhang <xiong.y.zhang@intel.com>
[danvet: Extend the encoder->get_config comment to specify that we now
also depend upon intel_encoder->base.crtc being correct. Also bikeshed
s/intel_crtc/crtc/.]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=65287Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent b5ea2d56
......@@ -1324,11 +1324,14 @@ 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 *crtc = to_intel_crtc(encoder->base.crtc);
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
......@@ -1338,6 +1341,18 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
flags |= DRM_MODE_FLAG_PVSYNC;
else
flags |= DRM_MODE_FLAG_NVSYNC;
} else {
tmp = I915_READ(TRANS_DP_CTL(crtc->pipe));
if (tmp & TRANS_DP_HSYNC_ACTIVE_HIGH)
flags |= DRM_MODE_FLAG_PHSYNC;
else
flags |= DRM_MODE_FLAG_NHSYNC;
if (tmp & TRANS_DP_VSYNC_ACTIVE_HIGH)
flags |= DRM_MODE_FLAG_PVSYNC;
else
flags |= DRM_MODE_FLAG_NVSYNC;
}
pipe_config->adjusted_mode.flags |= flags;
}
......
......@@ -141,7 +141,8 @@ struct intel_encoder {
bool (*get_hw_state)(struct intel_encoder *, enum pipe *pipe);
/* Reconstructs the equivalent mode flags for the current hardware
* state. This must be called _after_ display->get_pipe_config has
* pre-filled the pipe config. */
* pre-filled the pipe config. Note that intel_encoder->base.crtc must
* be set correctly before calling this function. */
void (*get_config)(struct intel_encoder *,
struct intel_crtc_config *pipe_config);
int crtc_mask;
......
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